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lockdep: Reintroduce generation count to make BFS faster
[linux-2.6.git] / drivers / s390 / net / claw.c
blobf370f8d460a721674f5537d79c8e528d23bb4b5e
1 /*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * Linux for zSeries version
6 * Copyright IBM Corp. 2002, 2009
7 * Author(s) Original code written by:
8 * Kazuo Iimura <iimura@jp.ibm.com>
9 * Rewritten by
10 * Andy Richter <richtera@us.ibm.com>
11 * Marc Price <mwprice@us.ibm.com>
12 *
13 * sysfs parms:
14 * group x.x.rrrr,x.x.wwww
15 * read_buffer nnnnnnn
16 * write_buffer nnnnnn
17 * host_name aaaaaaaa
18 * adapter_name aaaaaaaa
19 * api_type aaaaaaaa
20 *
21 * eg.
22 * group 0.0.0200 0.0.0201
23 * read_buffer 25
24 * write_buffer 20
25 * host_name LINUX390
26 * adapter_name RS6K
27 * api_type TCPIP
28 *
29 * where
30 *
31 * The device id is decided by the order entries
32 * are added to the group the first is claw0 the second claw1
33 * up to CLAW_MAX_DEV
34 *
35 * rrrr - the first of 2 consecutive device addresses used for the
36 * CLAW protocol.
37 * The specified address is always used as the input (Read)
38 * channel and the next address is used as the output channel.
39 *
40 * wwww - the second of 2 consecutive device addresses used for
41 * the CLAW protocol.
42 * The specified address is always used as the output
43 * channel and the previous address is used as the input channel.
44 *
45 * read_buffer - specifies number of input buffers to allocate.
46 * write_buffer - specifies number of output buffers to allocate.
47 * host_name - host name
48 * adaptor_name - adaptor name
49 * api_type - API type TCPIP or API will be sent and expected
50 * as ws_name
51 *
52 * Note the following requirements:
53 * 1) host_name must match the configured adapter_name on the remote side
54 * 2) adaptor_name must match the configured host name on the remote side
55 *
56 * Change History
57 * 1.00 Initial release shipped
58 * 1.10 Changes for Buffer allocation
59 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
60 * 1.25 Added Packing support
61 * 1.5
62 */
63
64 #define KMSG_COMPONENT "claw"
65
66 #include <asm/ccwdev.h>
67 #include <asm/ccwgroup.h>
68 #include <asm/debug.h>
69 #include <asm/idals.h>
70 #include <asm/io.h>
71 #include <linux/bitops.h>
72 #include <linux/ctype.h>
73 #include <linux/delay.h>
74 #include <linux/errno.h>
75 #include <linux/if_arp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/ip.h>
79 #include <linux/kernel.h>
80 #include <linux/module.h>
81 #include <linux/netdevice.h>
82 #include <linux/etherdevice.h>
83 #include <linux/proc_fs.h>
84 #include <linux/sched.h>
85 #include <linux/signal.h>
86 #include <linux/skbuff.h>
87 #include <linux/slab.h>
88 #include <linux/string.h>
89 #include <linux/tcp.h>
90 #include <linux/timer.h>
91 #include <linux/types.h>
92
93 #include "cu3088.h"
94 #include "claw.h"
95
96 /*
97 CLAW uses the s390dbf file system see claw_trace and claw_setup
98 */
99
100 static char version[] __initdata = "CLAW driver";
101 static char debug_buffer[255];
102 /**
103 * Debug Facility Stuff
104 */
105 static debug_info_t *claw_dbf_setup;
106 static debug_info_t *claw_dbf_trace;
107
108 /**
109 * CLAW Debug Facility functions
110 */
111 static void
112 claw_unregister_debug_facility(void)
113 {
114 if (claw_dbf_setup)
115 debug_unregister(claw_dbf_setup);
116 if (claw_dbf_trace)
117 debug_unregister(claw_dbf_trace);
118 }
119
120 static int
121 claw_register_debug_facility(void)
122 {
123 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
124 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
125 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
126 claw_unregister_debug_facility();
127 return -ENOMEM;
128 }
129 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
130 debug_set_level(claw_dbf_setup, 2);
131 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
132 debug_set_level(claw_dbf_trace, 2);
133 return 0;
134 }
135
136 static inline void
137 claw_set_busy(struct net_device *dev)
138 {
139 ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
140 eieio();
141 }
142
143 static inline void
144 claw_clear_busy(struct net_device *dev)
145 {
146 clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
147 netif_wake_queue(dev);
148 eieio();
149 }
150
151 static inline int
152 claw_check_busy(struct net_device *dev)
153 {
154 eieio();
155 return ((struct claw_privbk *) dev->ml_priv)->tbusy;
156 }
157
158 static inline void
159 claw_setbit_busy(int nr,struct net_device *dev)
160 {
161 netif_stop_queue(dev);
162 set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
163 }
164
165 static inline void
166 claw_clearbit_busy(int nr,struct net_device *dev)
167 {
168 clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
169 netif_wake_queue(dev);
170 }
171
172 static inline int
173 claw_test_and_setbit_busy(int nr,struct net_device *dev)
174 {
175 netif_stop_queue(dev);
176 return test_and_set_bit(nr,
177 (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
178 }
179
180
181 /* Functions for the DEV methods */
182
183 static int claw_probe(struct ccwgroup_device *cgdev);
184 static void claw_remove_device(struct ccwgroup_device *cgdev);
185 static void claw_purge_skb_queue(struct sk_buff_head *q);
186 static int claw_new_device(struct ccwgroup_device *cgdev);
187 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
188 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
189 static int claw_change_mtu( struct net_device *dev, int new_mtu);
190 static int claw_open(struct net_device *dev);
191 static void claw_irq_handler(struct ccw_device *cdev,
192 unsigned long intparm, struct irb *irb);
193 static void claw_irq_tasklet ( unsigned long data );
194 static int claw_release(struct net_device *dev);
195 static void claw_write_retry ( struct chbk * p_ch );
196 static void claw_write_next ( struct chbk * p_ch );
197 static void claw_timer ( struct chbk * p_ch );
198
199 /* Functions */
200 static int add_claw_reads(struct net_device *dev,
201 struct ccwbk* p_first, struct ccwbk* p_last);
202 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
203 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
204 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
205 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
206 static int init_ccw_bk(struct net_device *dev);
207 static void probe_error( struct ccwgroup_device *cgdev);
208 static struct net_device_stats *claw_stats(struct net_device *dev);
209 static int pages_to_order_of_mag(int num_of_pages);
210 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
211 /* sysfs Functions */
212 static ssize_t claw_hname_show(struct device *dev,
213 struct device_attribute *attr, char *buf);
214 static ssize_t claw_hname_write(struct device *dev,
215 struct device_attribute *attr,
216 const char *buf, size_t count);
217 static ssize_t claw_adname_show(struct device *dev,
218 struct device_attribute *attr, char *buf);
219 static ssize_t claw_adname_write(struct device *dev,
220 struct device_attribute *attr,
221 const char *buf, size_t count);
222 static ssize_t claw_apname_show(struct device *dev,
223 struct device_attribute *attr, char *buf);
224 static ssize_t claw_apname_write(struct device *dev,
225 struct device_attribute *attr,
226 const char *buf, size_t count);
227 static ssize_t claw_wbuff_show(struct device *dev,
228 struct device_attribute *attr, char *buf);
229 static ssize_t claw_wbuff_write(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count);
232 static ssize_t claw_rbuff_show(struct device *dev,
233 struct device_attribute *attr, char *buf);
234 static ssize_t claw_rbuff_write(struct device *dev,
235 struct device_attribute *attr,
236 const char *buf, size_t count);
237 static int claw_add_files(struct device *dev);
238 static void claw_remove_files(struct device *dev);
239
240 /* Functions for System Validate */
241 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
242 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
243 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
244 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
245 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
246 static int claw_snd_sys_validate_rsp(struct net_device *dev,
247 struct clawctl * p_ctl, __u32 return_code);
248 static int claw_strt_conn_req(struct net_device *dev );
249 static void claw_strt_read(struct net_device *dev, int lock);
250 static void claw_strt_out_IO(struct net_device *dev);
251 static void claw_free_wrt_buf(struct net_device *dev);
252
253 /* Functions for unpack reads */
254 static void unpack_read(struct net_device *dev);
255
256 static int claw_pm_prepare(struct ccwgroup_device *gdev)
257 {
258 return -EPERM;
259 }
260
261 /* ccwgroup table */
262
263 static struct ccwgroup_driver claw_group_driver = {
264 .owner = THIS_MODULE,
265 .name = "claw",
266 .max_slaves = 2,
267 .driver_id = 0xC3D3C1E6,
268 .probe = claw_probe,
269 .remove = claw_remove_device,
270 .set_online = claw_new_device,
271 .set_offline = claw_shutdown_device,
272 .prepare = claw_pm_prepare,
273 };
274
275 /*
276 * Key functions
277 */
278
279 /*----------------------------------------------------------------*
280 * claw_probe *
281 * this function is called for each CLAW device. *
282 *----------------------------------------------------------------*/
283 static int
284 claw_probe(struct ccwgroup_device *cgdev)
285 {
286 int rc;
287 struct claw_privbk *privptr=NULL;
288
289 CLAW_DBF_TEXT(2, setup, "probe");
290 if (!get_device(&cgdev->dev))
291 return -ENODEV;
292 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
293 dev_set_drvdata(&cgdev->dev, privptr);
294 if (privptr == NULL) {
295 probe_error(cgdev);
296 put_device(&cgdev->dev);
297 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
298 return -ENOMEM;
299 }
300 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
301 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
302 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
303 probe_error(cgdev);
304 put_device(&cgdev->dev);
305 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
306 return -ENOMEM;
307 }
308 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
309 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
310 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
311 privptr->p_env->packing = 0;
312 privptr->p_env->write_buffers = 5;
313 privptr->p_env->read_buffers = 5;
314 privptr->p_env->read_size = CLAW_FRAME_SIZE;
315 privptr->p_env->write_size = CLAW_FRAME_SIZE;
316 rc = claw_add_files(&cgdev->dev);
317 if (rc) {
318 probe_error(cgdev);
319 put_device(&cgdev->dev);
320 dev_err(&cgdev->dev, "Creating the /proc files for a new"
321 " CLAW device failed\n");
322 CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
323 return rc;
324 }
325 privptr->p_env->p_priv = privptr;
326 cgdev->cdev[0]->handler = claw_irq_handler;
327 cgdev->cdev[1]->handler = claw_irq_handler;
328 CLAW_DBF_TEXT(2, setup, "prbext 0");
329
330 return 0;
331 } /* end of claw_probe */
332
333 /*-------------------------------------------------------------------*
334 * claw_tx *
335 *-------------------------------------------------------------------*/
336
337 static int
338 claw_tx(struct sk_buff *skb, struct net_device *dev)
339 {
340 int rc;
341 struct claw_privbk *privptr = dev->ml_priv;
342 unsigned long saveflags;
343 struct chbk *p_ch;
344
345 CLAW_DBF_TEXT(4, trace, "claw_tx");
346 p_ch=&privptr->channel[WRITE];
347 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
348 rc=claw_hw_tx( skb, dev, 1 );
349 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
350 CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
351 if (rc)
352 rc = NETDEV_TX_BUSY;
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
361 static struct sk_buff *
362 claw_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;
371 CLAW_DBF_TEXT(4, trace, "PackSKBe");
372 if (!skb_queue_empty(&p_ch->collect_queue)) {
373 /* some data */
374 held_skb = skb_dequeue(&p_ch->collect_queue);
375 if (held_skb)
376 dev_kfree_skb_any(held_skb);
377 else
378 return NULL;
379 if (p_env->packing != DO_PACKED)
380 return held_skb;
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++;
399 dev_kfree_skb_any(held_skb);
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 }
409 }
410 CLAW_DBF_TEXT(4, trace, "PackSKBx");
411 return new_skb;
412 }
413
414 /*-------------------------------------------------------------------*
415 * claw_change_mtu *
416 * *
417 *-------------------------------------------------------------------*/
418
419 static int
420 claw_change_mtu(struct net_device *dev, int new_mtu)
421 {
422 struct claw_privbk *privptr = dev->ml_priv;
423 int buff_size;
424 CLAW_DBF_TEXT(4, trace, "setmtu");
425 buff_size = privptr->p_env->write_size;
426 if ((new_mtu < 60) || (new_mtu > buff_size)) {
427 return -EINVAL;
428 }
429 dev->mtu = new_mtu;
430 return 0;
431 } /* end of claw_change_mtu */
432
433
434 /*-------------------------------------------------------------------*
435 * claw_open *
436 * *
437 *-------------------------------------------------------------------*/
438 static int
439 claw_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
451 CLAW_DBF_TEXT(4, trace, "open");
452 privptr = (struct claw_privbk *)dev->ml_priv;
453 /* allocate and initialize CCW blocks */
454 if (privptr->buffs_alloc == 0) {
455 rc=init_ccw_bk(dev);
456 if (rc) {
457 CLAW_DBF_TEXT(2, trace, "openmem");
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++) {
476 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
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)) {
514 dev_info(&privptr->channel[READ].cdev->dev,
515 "%s: remote side is not ready\n", dev->name);
516 CLAW_DBF_TEXT(2, trace, "notrdy");
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);
572 CLAW_DBF_TEXT(2, trace, "open EIO");
573 return -EIO;
574 }
575
576 /* Send SystemValidate command */
577
578 claw_clear_busy(dev);
579 CLAW_DBF_TEXT(4, trace, "openok");
580 return 0;
581 } /* end of claw_open */
582
583 /*-------------------------------------------------------------------*
584 * *
585 * claw_irq_handler *
586 * *
587 *--------------------------------------------------------------------*/
588 static void
589 claw_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
598 CLAW_DBF_TEXT(4, trace, "clawirq");
599 /* Bypass all 'unsolicited interrupts' */
600 privptr = dev_get_drvdata(&cdev->dev);
601 if (!privptr) {
602 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
603 " IRQ, c-%02x d-%02x\n",
604 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
605 CLAW_DBF_TEXT(2, trace, "badirq");
606 return;
607 }
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 {
615 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
616 CLAW_DBF_TEXT(2, trace, "badchan");
617 return;
618 }
619 CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
620
621 dev = (struct net_device *) (p_ch->ndev);
622 p_env=privptr->p_env;
623
624 /* Copy interruption response block. */
625 memcpy(p_ch->irb, irb, sizeof(struct irb));
626
627 /* Check for good subchannel return code, otherwise info message */
628 if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
629 dev_info(&cdev->dev,
630 "%s: subchannel check for device: %04x -"
631 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
632 dev->name, p_ch->devno,
633 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
634 irb->scsw.cmd.cpa);
635 CLAW_DBF_TEXT(2, trace, "chanchk");
636 /* return; */
637 }
638
639 /* Check the reason-code of a unit check */
640 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
641 ccw_check_unit_check(p_ch, irb->ecw[0]);
642
643 /* State machine to bring the connection up, down and to restart */
644 p_ch->last_dstat = irb->scsw.cmd.dstat;
645
646 switch (p_ch->claw_state) {
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;
669 /* send SYSTEM_VALIDATE */
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 {
677 dev_warn(&cdev->dev, "The CLAW device received"
678 " an unexpected IRQ, "
679 "c-%02x d-%02x\n",
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++;
694 dev_info(&cdev->dev,
695 "%s: Restart is required after remote "
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);
707 else
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) {
730 dev_info(&cdev->dev,
731 "%s: Unit Check Occured in "
732 "write channel\n", dev->name);
733 clear_bit(0, (void *)&p_ch->IO_active);
734 if (p_ch->irb->ecw[0] & 0x80) {
735 dev_info(&cdev->dev,
736 "%s: Resetting Event "
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);
744 dev_info(&cdev->dev,
745 "%s: write connection "
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);
753 dev_info(&cdev->dev,
754 "%s: Unit Exception "
755 "occurred in write channel\n",
756 dev->name);
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:
778 dev_warn(&cdev->dev,
779 "The CLAW device for %s received an unexpected IRQ\n",
780 dev->name);
781 CLAW_DBF_TEXT(2, trace, "badIRQ");
782 return;
783 }
784
785 } /* end of claw_irq_handler */
786
787
788 /*-------------------------------------------------------------------*
789 * claw_irq_tasklet *
790 * *
791 *--------------------------------------------------------------------*/
792 static void
793 claw_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;
801 CLAW_DBF_TEXT(4, trace, "IRQtask");
802 privptr = (struct claw_privbk *)dev->ml_priv;
803 unpack_read(dev);
804 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
805 CLAW_DBF_TEXT(4, trace, "TskletXt");
806 return;
807 } /* end of claw_irq_bh */
808
809 /*-------------------------------------------------------------------*
810 * claw_release *
811 * *
812 *--------------------------------------------------------------------*/
813 static int
814 claw_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;
827 privptr = (struct claw_privbk *)dev->ml_priv;
828 if (!privptr)
829 return 0;
830 CLAW_DBF_TEXT(4, trace, "release");
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) {
858 dev_kfree_skb_any(privptr->pk_skb);
859 privptr->pk_skb = NULL;
860 }
861 if(privptr->buffs_alloc != 1) {
862 CLAW_DBF_TEXT(4, trace, "none2fre");
863 return 0;
864 }
865 CLAW_DBF_TEXT(4, trace, "freebufs");
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 }
870 CLAW_DBF_TEXT(4, trace, "freeread");
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 }
886 CLAW_DBF_TEXT(4, trace, "freewrit");
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 }
900 CLAW_DBF_TEXT(4, trace, "clearptr");
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) {
932 dev_warn(&privptr->channel[READ].cdev->dev,
933 "Deactivating %s completed with incorrect"
934 " subchannel status "
935 "(read %02x, write %02x)\n",
936 dev->name,
937 privptr->channel[READ].last_dstat,
938 privptr->channel[WRITE].last_dstat);
939 CLAW_DBF_TEXT(2, trace, "badclose");
940 }
941 CLAW_DBF_TEXT(4, trace, "rlsexit");
942 return 0;
943 } /* end of claw_release */
944
945 /*-------------------------------------------------------------------*
946 * claw_write_retry *
947 * *
948 *--------------------------------------------------------------------*/
949
950 static void
951 claw_write_retry ( struct chbk *p_ch )
952 {
953
954 struct net_device *dev=p_ch->ndev;
955
956 CLAW_DBF_TEXT(4, trace, "w_retry");
957 if (p_ch->claw_state == CLAW_STOP) {
958 return;
959 }
960 claw_strt_out_IO( dev );
961 CLAW_DBF_TEXT(4, trace, "rtry_xit");
962 return;
963 } /* end of claw_write_retry */
964
965
966 /*-------------------------------------------------------------------*
967 * claw_write_next *
968 * *
969 *--------------------------------------------------------------------*/
970
971 static void
972 claw_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
980 CLAW_DBF_TEXT(4, trace, "claw_wrt");
981 if (p_ch->claw_state == CLAW_STOP)
982 return;
983 dev = (struct net_device *) p_ch->ndev;
984 privptr = (struct claw_privbk *) dev->ml_priv;
985 claw_free_wrt_buf( dev );
986 if ((privptr->write_free_count > 0) &&
987 !skb_queue_empty(&p_ch->collect_queue)) {
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 }
1000 return;
1001 } /* end of claw_write_next */
1002
1003 /*-------------------------------------------------------------------*
1004 * *
1005 * claw_timer *
1006 *--------------------------------------------------------------------*/
1007
1008 static void
1009 claw_timer ( struct chbk * p_ch )
1010 {
1011 CLAW_DBF_TEXT(4, trace, "timer");
1012 p_ch->flag |= CLAW_TIMER;
1013 wake_up(&p_ch->wait);
1014 return;
1015 } /* end of claw_timer */
1016
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
1032 static int
1033 pages_to_order_of_mag(int num_of_pages)
1034 {
1035 int order_of_mag=1; /* assume 2 pages */
1036 int nump;
1037
1038 CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
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 */
1049 CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1050 return order_of_mag;
1051 }
1052
1053 /*-------------------------------------------------------------------*
1054 * *
1055 * add_claw_reads *
1056 * *
1057 *--------------------------------------------------------------------*/
1058 static int
1059 add_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;
1065 CLAW_DBF_TEXT(4, trace, "addreads");
1066 privptr = dev->ml_priv;
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) {
1073 CLAW_DBF_TEXT(4, trace, "addexit");
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 ) {
1100 privptr->p_read_active_first = p_first; /* set new first */
1101 privptr->p_read_active_last = p_last; /* set new last */
1102 }
1103 else {
1104
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 }
1137 /* chain in new set of blocks */
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) */
1141 CLAW_DBF_TEXT(4, trace, "addexit");
1142 return 0;
1143 } /* end of add_claw_reads */
1144
1145 /*-------------------------------------------------------------------*
1146 * ccw_check_return_code *
1147 * *
1148 *-------------------------------------------------------------------*/
1149
1150 static void
1151 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1152 {
1153 CLAW_DBF_TEXT(4, trace, "ccwret");
1154 if (return_code != 0) {
1155 switch (return_code) {
1156 case -EBUSY: /* BUSY is a transient state no action needed */
1157 break;
1158 case -ENODEV:
1159 dev_err(&cdev->dev, "The remote channel adapter is not"
1160 " available\n");
1161 break;
1162 case -EINVAL:
1163 dev_err(&cdev->dev,
1164 "The status of the remote channel adapter"
1165 " is not valid\n");
1166 break;
1167 default:
1168 dev_err(&cdev->dev, "The common device layer"
1169 " returned error code %d\n",
1170 return_code);
1171 }
1172 }
1173 CLAW_DBF_TEXT(4, trace, "ccwret");
1174 } /* end of ccw_check_return_code */
1175
1176 /*-------------------------------------------------------------------*
1177 * ccw_check_unit_check *
1178 *--------------------------------------------------------------------*/
1179
1180 static void
1181 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1182 {
1183 struct net_device *ndev = p_ch->ndev;
1184 struct device *dev = &p_ch->cdev->dev;
1185
1186 CLAW_DBF_TEXT(4, trace, "unitchek");
1187 dev_warn(dev, "The communication peer of %s disconnected\n",
1188 ndev->name);
1189
1190 if (sense & 0x40) {
1191 if (sense & 0x01) {
1192 dev_warn(dev, "The remote channel adapter for"
1193 " %s has been reset\n",
1194 ndev->name);
1195 }
1196 } else if (sense & 0x20) {
1197 if (sense & 0x04) {
1198 dev_warn(dev, "A data streaming timeout occurred"
1199 " for %s\n",
1200 ndev->name);
1201 } else if (sense & 0x10) {
1202 dev_warn(dev, "The remote channel adapter for %s"
1203 " is faulty\n",
1204 ndev->name);
1205 } else {
1206 dev_warn(dev, "A data transfer parity error occurred"
1207 " for %s\n",
1208 ndev->name);
1209 }
1210 } else if (sense & 0x10) {
1211 dev_warn(dev, "A read data parity error occurred"
1212 " for %s\n",
1213 ndev->name);
1214 }
1215
1216 } /* end of ccw_check_unit_check */
1217
1218 /*-------------------------------------------------------------------*
1219 * find_link *
1220 *--------------------------------------------------------------------*/
1221 static int
1222 find_link(struct net_device *dev, char *host_name, char *ws_name )
1223 {
1224 struct claw_privbk *privptr;
1225 struct claw_env *p_env;
1226 int rc=0;
1227
1228 CLAW_DBF_TEXT(2, setup, "findlink");
1229 privptr = dev->ml_priv;
1230 p_env=privptr->p_env;
1231 switch (p_env->packing)
1232 {
1233 case PACKING_ASK:
1234 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1235 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1236 rc = EINVAL;
1237 break;
1238 case DO_PACKED:
1239 case PACK_SEND:
1240 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1241 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1242 rc = EINVAL;
1243 break;
1244 default:
1245 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1246 (memcmp(p_env->api_type , ws_name, 8)!=0))
1247 rc = EINVAL;
1248 break;
1249 }
1250
1251 return rc;
1252 } /* end of find_link */
1253
1254 /*-------------------------------------------------------------------*
1255 * claw_hw_tx *
1256 * *
1257 * *
1258 *-------------------------------------------------------------------*/
1259
1260 static int
1261 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1262 {
1263 int rc=0;
1264 struct claw_privbk *privptr;
1265 struct ccwbk *p_this_ccw;
1266 struct ccwbk *p_first_ccw;
1267 struct ccwbk *p_last_ccw;
1268 __u32 numBuffers;
1269 signed long len_of_data;
1270 unsigned long bytesInThisBuffer;
1271 unsigned char *pDataAddress;
1272 struct endccw *pEnd;
1273 struct ccw1 tempCCW;
1274 struct chbk *p_ch;
1275 struct claw_env *p_env;
1276 int lock;
1277 struct clawph *pk_head;
1278 struct chbk *ch;
1279
1280 CLAW_DBF_TEXT(4, trace, "hw_tx");
1281 privptr = (struct claw_privbk *)(dev->ml_priv);
1282 p_ch=(struct chbk *)&privptr->channel[WRITE];
1283 p_env =privptr->p_env;
1284 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1285 /* scan the write queue to free any completed write packets */
1286 p_first_ccw=NULL;
1287 p_last_ccw=NULL;
1288 if ((p_env->packing >= PACK_SEND) &&
1289 (skb->cb[1] != 'P')) {
1290 skb_push(skb,sizeof(struct clawph));
1291 pk_head=(struct clawph *)skb->data;
1292 pk_head->len=skb->len-sizeof(struct clawph);
1293 if (pk_head->len%4) {
1294 pk_head->len+= 4-(pk_head->len%4);
1295 skb_pad(skb,4-(pk_head->len%4));
1296 skb_put(skb,4-(pk_head->len%4));
1297 }
1298 if (p_env->packing == DO_PACKED)
1299 pk_head->link_num = linkid;
1300 else
1301 pk_head->link_num = 0;
1302 pk_head->flag = 0x00;
1303 skb_pad(skb,4);
1304 skb->cb[1] = 'P';
1305 }
1306 if (linkid == 0) {
1307 if (claw_check_busy(dev)) {
1308 if (privptr->write_free_count!=0) {
1309 claw_clear_busy(dev);
1310 }
1311 else {
1312 claw_strt_out_IO(dev );
1313 claw_free_wrt_buf( dev );
1314 if (privptr->write_free_count==0) {
1315 ch = &privptr->channel[WRITE];
1316 atomic_inc(&skb->users);
1317 skb_queue_tail(&ch->collect_queue, skb);
1318 goto Done;
1319 }
1320 else {
1321 claw_clear_busy(dev);
1322 }
1323 }
1324 }
1325 /* tx lock */
1326 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1327 ch = &privptr->channel[WRITE];
1328 atomic_inc(&skb->users);
1329 skb_queue_tail(&ch->collect_queue, skb);
1330 claw_strt_out_IO(dev );
1331 rc=-EBUSY;
1332 goto Done2;
1333 }
1334 }
1335 /* See how many write buffers are required to hold this data */
1336 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1337
1338 /* If that number of buffers isn't available, give up for now */
1339 if (privptr->write_free_count < numBuffers ||
1340 privptr->p_write_free_chain == NULL ) {
1341
1342 claw_setbit_busy(TB_NOBUFFER,dev);
1343 ch = &privptr->channel[WRITE];
1344 atomic_inc(&skb->users);
1345 skb_queue_tail(&ch->collect_queue, skb);
1346 CLAW_DBF_TEXT(2, trace, "clawbusy");
1347 goto Done2;
1348 }
1349 pDataAddress=skb->data;
1350 len_of_data=skb->len;
1351
1352 while (len_of_data > 0) {
1353 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1354 if (p_this_ccw == NULL) { /* lost the race */
1355 ch = &privptr->channel[WRITE];
1356 atomic_inc(&skb->users);
1357 skb_queue_tail(&ch->collect_queue, skb);
1358 goto Done2;
1359 }
1360 privptr->p_write_free_chain=p_this_ccw->next;
1361 p_this_ccw->next=NULL;
1362 --privptr->write_free_count; /* -1 */
1363 if (len_of_data >= privptr->p_env->write_size)
1364 bytesInThisBuffer = privptr->p_env->write_size;
1365 else
1366 bytesInThisBuffer = len_of_data;
1367 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1368 len_of_data-=bytesInThisBuffer;
1369 pDataAddress+=(unsigned long)bytesInThisBuffer;
1370 /* setup write CCW */
1371 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1372 if (len_of_data>0) {
1373 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1374 }
1375 p_this_ccw->write.count=bytesInThisBuffer;
1376 /* now add to end of this chain */
1377 if (p_first_ccw==NULL) {
1378 p_first_ccw=p_this_ccw;
1379 }
1380 if (p_last_ccw!=NULL) {
1381 p_last_ccw->next=p_this_ccw;
1382 /* set up TIC ccws */
1383 p_last_ccw->w_TIC_1.cda=
1384 (__u32)__pa(&p_this_ccw->write);
1385 }
1386 p_last_ccw=p_this_ccw; /* save new last block */
1387 }
1388
1389 /* FirstCCW and LastCCW now contain a new set of write channel
1390 * programs to append to the running channel program
1391 */
1392
1393 if (p_first_ccw!=NULL) {
1394 /* setup ending ccw sequence for this segment */
1395 pEnd=privptr->p_end_ccw;
1396 if (pEnd->write1) {
1397 pEnd->write1=0x00; /* second end ccw is now active */
1398 /* set up Tic CCWs */
1399 p_last_ccw->w_TIC_1.cda=
1400 (__u32)__pa(&pEnd->write2_nop1);
1401 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1402 pEnd->write2_nop2.flags =
1403 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1404 pEnd->write2_nop2.cda=0;
1405 pEnd->write2_nop2.count=1;
1406 }
1407 else { /* end of if (pEnd->write1)*/
1408 pEnd->write1=0x01; /* first end ccw is now active */
1409 /* set up Tic CCWs */
1410 p_last_ccw->w_TIC_1.cda=
1411 (__u32)__pa(&pEnd->write1_nop1);
1412 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1413 pEnd->write1_nop2.flags =
1414 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1415 pEnd->write1_nop2.cda=0;
1416 pEnd->write1_nop2.count=1;
1417 } /* end if if (pEnd->write1) */
1418
1419 if (privptr->p_write_active_first==NULL ) {
1420 privptr->p_write_active_first=p_first_ccw;
1421 privptr->p_write_active_last=p_last_ccw;
1422 }
1423 else {
1424 /* set up Tic CCWs */
1425
1426 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1427 tempCCW.count=0;
1428 tempCCW.flags=0;
1429 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1430
1431 if (pEnd->write1) {
1432
1433 /*
1434 * first set of ending CCW's is chained to the new write
1435 * chain, so the second set is chained to the active chain
1436 * Therefore modify the second set to point the new write chain.
1437 * make sure we update the CCW atomically
1438 * so channel does not fetch it when it's only half done
1439 */
1440 memcpy( &pEnd->write2_nop2, &tempCCW ,
1441 sizeof(struct ccw1));
1442 privptr->p_write_active_last->w_TIC_1.cda=
1443 (__u32)__pa(&p_first_ccw->write);
1444 }
1445 else {
1446
1447 /*make sure we update the CCW atomically
1448 *so channel does not fetch it when it's only half done
1449 */
1450 memcpy(&pEnd->write1_nop2, &tempCCW ,
1451 sizeof(struct ccw1));
1452 privptr->p_write_active_last->w_TIC_1.cda=
1453 (__u32)__pa(&p_first_ccw->write);
1454
1455 } /* end if if (pEnd->write1) */
1456
1457 privptr->p_write_active_last->next=p_first_ccw;
1458 privptr->p_write_active_last=p_last_ccw;
1459 }
1460
1461 } /* endif (p_first_ccw!=NULL) */
1462 dev_kfree_skb_any(skb);
1463 if (linkid==0) {
1464 lock=LOCK_NO;
1465 }
1466 else {
1467 lock=LOCK_YES;
1468 }
1469 claw_strt_out_IO(dev );
1470 /* if write free count is zero , set NOBUFFER */
1471 if (privptr->write_free_count==0) {
1472 claw_setbit_busy(TB_NOBUFFER,dev);
1473 }
1474 Done2:
1475 claw_clearbit_busy(TB_TX,dev);
1476 Done:
1477 return(rc);
1478 } /* end of claw_hw_tx */
1479
1480 /*-------------------------------------------------------------------*
1481 * *
1482 * init_ccw_bk *
1483 * *
1484 *--------------------------------------------------------------------*/
1485
1486 static int
1487 init_ccw_bk(struct net_device *dev)
1488 {
1489
1490 __u32 ccw_blocks_required;
1491 __u32 ccw_blocks_perpage;
1492 __u32 ccw_pages_required;
1493 __u32 claw_reads_perpage=1;
1494 __u32 claw_read_pages;
1495 __u32 claw_writes_perpage=1;
1496 __u32 claw_write_pages;
1497 void *p_buff=NULL;
1498 struct ccwbk*p_free_chain;
1499 struct ccwbk*p_buf;
1500 struct ccwbk*p_last_CCWB;
1501 struct ccwbk*p_first_CCWB;
1502 struct endccw *p_endccw=NULL;
1503 addr_t real_address;
1504 struct claw_privbk *privptr = dev->ml_priv;
1505 struct clawh *pClawH=NULL;
1506 addr_t real_TIC_address;
1507 int i,j;
1508 CLAW_DBF_TEXT(4, trace, "init_ccw");
1509
1510 /* initialize statistics field */
1511 privptr->active_link_ID=0;
1512 /* initialize ccwbk pointers */
1513 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1514 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1515 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1516 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1517 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1518 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1519 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1520 privptr->buffs_alloc = 0;
1521 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1522 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1523 /* initialize free write ccwbk counter */
1524 privptr->write_free_count=0; /* number of free bufs on write chain */
1525 p_last_CCWB = NULL;
1526 p_first_CCWB= NULL;
1527 /*
1528 * We need 1 CCW block for each read buffer, 1 for each
1529 * write buffer, plus 1 for ClawSignalBlock
1530 */
1531 ccw_blocks_required =
1532 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1533 /*
1534 * compute number of CCW blocks that will fit in a page
1535 */
1536 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1537 ccw_pages_required=
1538 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1539
1540 /*
1541 * read and write sizes are set by 2 constants in claw.h
1542 * 4k and 32k. Unpacked values other than 4k are not going to
1543 * provide good performance. With packing buffers support 32k
1544 * buffers are used.
1545 */
1546 if (privptr->p_env->read_size < PAGE_SIZE) {
1547 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1548 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1549 claw_reads_perpage);
1550 }
1551 else { /* > or equal */
1552 privptr->p_buff_pages_perread =
1553 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1554 claw_read_pages = privptr->p_env->read_buffers *
1555 privptr->p_buff_pages_perread;
1556 }
1557 if (privptr->p_env->write_size < PAGE_SIZE) {
1558 claw_writes_perpage =
1559 PAGE_SIZE / privptr->p_env->write_size;
1560 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1561 claw_writes_perpage);
1562
1563 }
1564 else { /* > or equal */
1565 privptr->p_buff_pages_perwrite =
1566 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1567 claw_write_pages = privptr->p_env->write_buffers *
1568 privptr->p_buff_pages_perwrite;
1569 }
1570 /*
1571 * allocate ccw_pages_required
1572 */
1573 if (privptr->p_buff_ccw==NULL) {
1574 privptr->p_buff_ccw=
1575 (void *)__get_free_pages(__GFP_DMA,
1576 (int)pages_to_order_of_mag(ccw_pages_required ));
1577 if (privptr->p_buff_ccw==NULL) {
1578 return -ENOMEM;
1579 }
1580 privptr->p_buff_ccw_num=ccw_pages_required;
1581 }
1582 memset(privptr->p_buff_ccw, 0x00,
1583 privptr->p_buff_ccw_num * PAGE_SIZE);
1584
1585 /*
1586 * obtain ending ccw block address
1587 *
1588 */
1589 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1590 real_address = (__u32)__pa(privptr->p_end_ccw);
1591 /* Initialize ending CCW block */
1592 p_endccw=privptr->p_end_ccw;
1593 p_endccw->real=real_address;
1594 p_endccw->write1=0x00;
1595 p_endccw->read1=0x00;
1596
1597 /* write1_nop1 */
1598 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1599 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1600 p_endccw->write1_nop1.count = 1;
1601 p_endccw->write1_nop1.cda = 0;
1602
1603 /* write1_nop2 */
1604 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1605 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1606 p_endccw->write1_nop2.count = 1;
1607 p_endccw->write1_nop2.cda = 0;
1608
1609 /* write2_nop1 */
1610 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1611 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1612 p_endccw->write2_nop1.count = 1;
1613 p_endccw->write2_nop1.cda = 0;
1614
1615 /* write2_nop2 */
1616 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1617 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1618 p_endccw->write2_nop2.count = 1;
1619 p_endccw->write2_nop2.cda = 0;
1620
1621 /* read1_nop1 */
1622 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1623 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1624 p_endccw->read1_nop1.count = 1;
1625 p_endccw->read1_nop1.cda = 0;
1626
1627 /* read1_nop2 */
1628 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1629 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1630 p_endccw->read1_nop2.count = 1;
1631 p_endccw->read1_nop2.cda = 0;
1632
1633 /* read2_nop1 */
1634 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1635 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1636 p_endccw->read2_nop1.count = 1;
1637 p_endccw->read2_nop1.cda = 0;
1638
1639 /* read2_nop2 */
1640 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1641 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1642 p_endccw->read2_nop2.count = 1;
1643 p_endccw->read2_nop2.cda = 0;
1644
1645 /*
1646 * Build a chain of CCWs
1647 *
1648 */
1649 p_buff=privptr->p_buff_ccw;
1650
1651 p_free_chain=NULL;
1652 for (i=0 ; i < ccw_pages_required; i++ ) {
1653 real_address = (__u32)__pa(p_buff);
1654 p_buf=p_buff;
1655 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1656 p_buf->next = p_free_chain;
1657 p_free_chain = p_buf;
1658 p_buf->real=(__u32)__pa(p_buf);
1659 ++p_buf;
1660 }
1661 p_buff+=PAGE_SIZE;
1662 }
1663 /*
1664 * Initialize ClawSignalBlock
1665 *
1666 */
1667 if (privptr->p_claw_signal_blk==NULL) {
1668 privptr->p_claw_signal_blk=p_free_chain;
1669 p_free_chain=p_free_chain->next;
1670 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1671 pClawH->length=0xffff;
1672 pClawH->opcode=0xff;
1673 pClawH->flag=CLAW_BUSY;
1674 }
1675
1676 /*
1677 * allocate write_pages_required and add to free chain
1678 */
1679 if (privptr->p_buff_write==NULL) {
1680 if (privptr->p_env->write_size < PAGE_SIZE) {
1681 privptr->p_buff_write=
1682 (void *)__get_free_pages(__GFP_DMA,
1683 (int)pages_to_order_of_mag(claw_write_pages ));
1684 if (privptr->p_buff_write==NULL) {
1685 privptr->p_buff_ccw=NULL;
1686 return -ENOMEM;
1687 }
1688 /*
1689 * Build CLAW write free chain
1690 *
1691 */
1692
1693 memset(privptr->p_buff_write, 0x00,
1694 ccw_pages_required * PAGE_SIZE);
1695 privptr->p_write_free_chain=NULL;
1696
1697 p_buff=privptr->p_buff_write;
1698
1699 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1700 p_buf = p_free_chain; /* get a CCW */
1701 p_free_chain = p_buf->next;
1702 p_buf->next =privptr->p_write_free_chain;
1703 privptr->p_write_free_chain = p_buf;
1704 p_buf-> p_buffer = (struct clawbuf *)p_buff;
1705 p_buf-> write.cda = (__u32)__pa(p_buff);
1706 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1707 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1708 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1709 p_buf-> w_read_FF.count = 1;
1710 p_buf-> w_read_FF.cda =
1711 (__u32)__pa(&p_buf-> header.flag);
1712 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1713 p_buf-> w_TIC_1.flags = 0;
1714 p_buf-> w_TIC_1.count = 0;
1715
1716 if (((unsigned long)p_buff +
1717 privptr->p_env->write_size) >=
1718 ((unsigned long)(p_buff+2*
1719 (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1720 p_buff = p_buff+privptr->p_env->write_size;
1721 }
1722 }
1723 }
1724 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1725 {
1726 privptr->p_write_free_chain=NULL;
1727 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1728 p_buff=(void *)__get_free_pages(__GFP_DMA,
1729 (int)pages_to_order_of_mag(
1730 privptr->p_buff_pages_perwrite) );
1731 if (p_buff==NULL) {
1732 free_pages((unsigned long)privptr->p_buff_ccw,
1733 (int)pages_to_order_of_mag(
1734 privptr->p_buff_ccw_num));
1735 privptr->p_buff_ccw=NULL;
1736 p_buf=privptr->p_buff_write;
1737 while (p_buf!=NULL) {
1738 free_pages((unsigned long)
1739 p_buf->p_buffer,
1740 (int)pages_to_order_of_mag(
1741 privptr->p_buff_pages_perwrite));
1742 p_buf=p_buf->next;
1743 }
1744 return -ENOMEM;
1745 } /* Error on get_pages */
1746 memset(p_buff, 0x00, privptr->p_env->write_size );
1747 p_buf = p_free_chain;
1748 p_free_chain = p_buf->next;
1749 p_buf->next = privptr->p_write_free_chain;
1750 privptr->p_write_free_chain = p_buf;
1751 privptr->p_buff_write = p_buf;
1752 p_buf->p_buffer=(struct clawbuf *)p_buff;
1753 p_buf-> write.cda = (__u32)__pa(p_buff);
1754 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1755 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1756 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1757 p_buf-> w_read_FF.count = 1;
1758 p_buf-> w_read_FF.cda =
1759 (__u32)__pa(&p_buf-> header.flag);
1760 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1761 p_buf-> w_TIC_1.flags = 0;
1762 p_buf-> w_TIC_1.count = 0;
1763 } /* for all write_buffers */
1764
1765 } /* else buffers are PAGE_SIZE or bigger */
1766
1767 }
1768 privptr->p_buff_write_num=claw_write_pages;
1769 privptr->write_free_count=privptr->p_env->write_buffers;
1770
1771
1772 /*
1773 * allocate read_pages_required and chain to free chain
1774 */
1775 if (privptr->p_buff_read==NULL) {
1776 if (privptr->p_env->read_size < PAGE_SIZE) {
1777 privptr->p_buff_read=
1778 (void *)__get_free_pages(__GFP_DMA,
1779 (int)pages_to_order_of_mag(claw_read_pages) );
1780 if (privptr->p_buff_read==NULL) {
1781 free_pages((unsigned long)privptr->p_buff_ccw,
1782 (int)pages_to_order_of_mag(
1783 privptr->p_buff_ccw_num));
1784 /* free the write pages size is < page size */
1785 free_pages((unsigned long)privptr->p_buff_write,
1786 (int)pages_to_order_of_mag(
1787 privptr->p_buff_write_num));
1788 privptr->p_buff_ccw=NULL;
1789 privptr->p_buff_write=NULL;
1790 return -ENOMEM;
1791 }
1792 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1793 privptr->p_buff_read_num=claw_read_pages;
1794 /*
1795 * Build CLAW read free chain
1796 *
1797 */
1798 p_buff=privptr->p_buff_read;
1799 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1800 p_buf = p_free_chain;
1801 p_free_chain = p_buf->next;
1802
1803 if (p_last_CCWB==NULL) {
1804 p_buf->next=NULL;
1805 real_TIC_address=0;
1806 p_last_CCWB=p_buf;
1807 }
1808 else {
1809 p_buf->next=p_first_CCWB;
1810 real_TIC_address=
1811 (__u32)__pa(&p_first_CCWB -> read );
1812 }
1813
1814 p_first_CCWB=p_buf;
1815
1816 p_buf->p_buffer=(struct clawbuf *)p_buff;
1817 /* initialize read command */
1818 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1819 p_buf-> read.cda = (__u32)__pa(p_buff);
1820 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1821 p_buf-> read.count = privptr->p_env->read_size;
1822
1823 /* initialize read_h command */
1824 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1825 p_buf-> read_h.cda =
1826 (__u32)__pa(&(p_buf->header));
1827 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1828 p_buf-> read_h.count = sizeof(struct clawh);
1829
1830 /* initialize Signal command */
1831 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1832 p_buf-> signal.cda =
1833 (__u32)__pa(&(pClawH->flag));
1834 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1835 p_buf-> signal.count = 1;
1836
1837 /* initialize r_TIC_1 command */
1838 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1839 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1840 p_buf-> r_TIC_1.flags = 0;
1841 p_buf-> r_TIC_1.count = 0;
1842
1843 /* initialize r_read_FF command */
1844 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1845 p_buf-> r_read_FF.cda =
1846 (__u32)__pa(&(pClawH->flag));
1847 p_buf-> r_read_FF.flags =
1848 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1849 p_buf-> r_read_FF.count = 1;
1850
1851 /* initialize r_TIC_2 */
1852 memcpy(&p_buf->r_TIC_2,
1853 &p_buf->r_TIC_1, sizeof(struct ccw1));
1854
1855 /* initialize Header */
1856 p_buf->header.length=0xffff;
1857 p_buf->header.opcode=0xff;
1858 p_buf->header.flag=CLAW_PENDING;
1859
1860 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1861 ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1862 -1)
1863 & PAGE_MASK)) {
1864 p_buff= p_buff+privptr->p_env->read_size;
1865 }
1866 else {
1867 p_buff=
1868 (void *)((unsigned long)
1869 (p_buff+2*(privptr->p_env->read_size)-1)
1870 & PAGE_MASK) ;
1871 }
1872 } /* for read_buffers */
1873 } /* read_size < PAGE_SIZE */
1874 else { /* read Size >= PAGE_SIZE */
1875 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1876 p_buff = (void *)__get_free_pages(__GFP_DMA,
1877 (int)pages_to_order_of_mag(
1878 privptr->p_buff_pages_perread));
1879 if (p_buff==NULL) {
1880 free_pages((unsigned long)privptr->p_buff_ccw,
1881 (int)pages_to_order_of_mag(privptr->
1882 p_buff_ccw_num));
1883 /* free the write pages */
1884 p_buf=privptr->p_buff_write;
1885 while (p_buf!=NULL) {
1886 free_pages(
1887 (unsigned long)p_buf->p_buffer,
1888 (int)pages_to_order_of_mag(
1889 privptr->p_buff_pages_perwrite));
1890 p_buf=p_buf->next;
1891 }
1892 /* free any read pages already alloc */
1893 p_buf=privptr->p_buff_read;
1894 while (p_buf!=NULL) {
1895 free_pages(
1896 (unsigned long)p_buf->p_buffer,
1897 (int)pages_to_order_of_mag(
1898 privptr->p_buff_pages_perread));
1899 p_buf=p_buf->next;
1900 }
1901 privptr->p_buff_ccw=NULL;
1902 privptr->p_buff_write=NULL;
1903 return -ENOMEM;
1904 }
1905 memset(p_buff, 0x00, privptr->p_env->read_size);
1906 p_buf = p_free_chain;
1907 privptr->p_buff_read = p_buf;
1908 p_free_chain = p_buf->next;
1909
1910 if (p_last_CCWB==NULL) {
1911 p_buf->next=NULL;
1912 real_TIC_address=0;
1913 p_last_CCWB=p_buf;
1914 }
1915 else {
1916 p_buf->next=p_first_CCWB;
1917 real_TIC_address=
1918 (addr_t)__pa(
1919 &p_first_CCWB -> read );
1920 }
1921
1922 p_first_CCWB=p_buf;
1923 /* save buff address */
1924 p_buf->p_buffer=(struct clawbuf *)p_buff;
1925 /* initialize read command */
1926 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1927 p_buf-> read.cda = (__u32)__pa(p_buff);
1928 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1929 p_buf-> read.count = privptr->p_env->read_size;
1930
1931 /* initialize read_h command */
1932 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1933 p_buf-> read_h.cda =
1934 (__u32)__pa(&(p_buf->header));
1935 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1936 p_buf-> read_h.count = sizeof(struct clawh);
1937
1938 /* initialize Signal command */
1939 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1940 p_buf-> signal.cda =
1941 (__u32)__pa(&(pClawH->flag));
1942 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1943 p_buf-> signal.count = 1;
1944
1945 /* initialize r_TIC_1 command */
1946 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1947 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1948 p_buf-> r_TIC_1.flags = 0;
1949 p_buf-> r_TIC_1.count = 0;
1950
1951 /* initialize r_read_FF command */
1952 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1953 p_buf-> r_read_FF.cda =
1954 (__u32)__pa(&(pClawH->flag));
1955 p_buf-> r_read_FF.flags =
1956 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1957 p_buf-> r_read_FF.count = 1;
1958
1959 /* initialize r_TIC_2 */
1960 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
1961 sizeof(struct ccw1));
1962
1963 /* initialize Header */
1964 p_buf->header.length=0xffff;
1965 p_buf->header.opcode=0xff;
1966 p_buf->header.flag=CLAW_PENDING;
1967
1968 } /* For read_buffers */
1969 } /* read_size >= PAGE_SIZE */
1970 } /* pBuffread = NULL */
1971 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
1972 privptr->buffs_alloc = 1;
1973
1974 return 0;
1975 } /* end of init_ccw_bk */
1976
1977 /*-------------------------------------------------------------------*
1978 * *
1979 * probe_error *
1980 * *
1981 *--------------------------------------------------------------------*/
1982
1983 static void
1984 probe_error( struct ccwgroup_device *cgdev)
1985 {
1986 struct claw_privbk *privptr;
1987
1988 CLAW_DBF_TEXT(4, trace, "proberr");
1989 privptr = dev_get_drvdata(&cgdev->dev);
1990 if (privptr != NULL) {
1991 dev_set_drvdata(&cgdev->dev, NULL);
1992 kfree(privptr->p_env);
1993 kfree(privptr->p_mtc_envelope);
1994 kfree(privptr);
1995 }
1996 } /* probe_error */
1997
1998 /*-------------------------------------------------------------------*
1999 * claw_process_control *
2000 * *
2001 * *
2002 *--------------------------------------------------------------------*/
2003
2004 static int
2005 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2006 {
2007
2008 struct clawbuf *p_buf;
2009 struct clawctl ctlbk;
2010 struct clawctl *p_ctlbk;
2011 char temp_host_name[8];
2012 char temp_ws_name[8];
2013 struct claw_privbk *privptr;
2014 struct claw_env *p_env;
2015 struct sysval *p_sysval;
2016 struct conncmd *p_connect=NULL;
2017 int rc;
2018 struct chbk *p_ch = NULL;
2019 struct device *tdev;
2020 CLAW_DBF_TEXT(2, setup, "clw_cntl");
2021 udelay(1000); /* Wait a ms for the control packets to
2022 *catch up to each other */
2023 privptr = dev->ml_priv;
2024 p_env=privptr->p_env;
2025 tdev = &privptr->channel[READ].cdev->dev;
2026 memcpy( &temp_host_name, p_env->host_name, 8);
2027 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2028 dev_info(tdev, "%s: CLAW device %.8s: "
2029 "Received Control Packet\n",
2030 dev->name, temp_ws_name);
2031 if (privptr->release_pend==1) {
2032 return 0;
2033 }
2034 p_buf=p_ccw->p_buffer;
2035 p_ctlbk=&ctlbk;
2036 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2037 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2038 } else {
2039 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2040 }
2041 switch (p_ctlbk->command)
2042 {
2043 case SYSTEM_VALIDATE_REQUEST:
2044 if (p_ctlbk->version != CLAW_VERSION_ID) {
2045 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2046 CLAW_RC_WRONG_VERSION);
2047 dev_warn(tdev, "The communication peer of %s"
2048 " uses an incorrect API version %d\n",
2049 dev->name, p_ctlbk->version);
2050 }
2051 p_sysval = (struct sysval *)&(p_ctlbk->data);
2052 dev_info(tdev, "%s: Recv Sys Validate Request: "
2053 "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2054 "Host name=%.8s\n",
2055 dev->name, p_ctlbk->version,
2056 p_ctlbk->linkid,
2057 p_ctlbk->correlator,
2058 p_sysval->WS_name,
2059 p_sysval->host_name);
2060 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2061 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2062 CLAW_RC_NAME_MISMATCH);
2063 CLAW_DBF_TEXT(2, setup, "HSTBAD");
2064 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2065 CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2066 dev_warn(tdev,
2067 "Host name %s for %s does not match the"
2068 " remote adapter name %s\n",
2069 p_sysval->host_name,
2070 dev->name,
2071 temp_host_name);
2072 }
2073 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2074 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2075 CLAW_RC_NAME_MISMATCH);
2076 CLAW_DBF_TEXT(2, setup, "WSNBAD");
2077 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2078 CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2079 dev_warn(tdev, "Adapter name %s for %s does not match"
2080 " the remote host name %s\n",
2081 p_sysval->WS_name,
2082 dev->name,
2083 temp_ws_name);
2084 }
2085 if ((p_sysval->write_frame_size < p_env->write_size) &&
2086 (p_env->packing == 0)) {
2087 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2088 CLAW_RC_HOST_RCV_TOO_SMALL);
2089 dev_warn(tdev,
2090 "The local write buffer is smaller than the"
2091 " remote read buffer\n");
2092 CLAW_DBF_TEXT(2, setup, "wrtszbad");
2093 }
2094 if ((p_sysval->read_frame_size < p_env->read_size) &&
2095 (p_env->packing == 0)) {
2096 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2097 CLAW_RC_HOST_RCV_TOO_SMALL);
2098 dev_warn(tdev,
2099 "The local read buffer is smaller than the"
2100 " remote write buffer\n");
2101 CLAW_DBF_TEXT(2, setup, "rdsizbad");
2102 }
2103 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2104 dev_info(tdev,
2105 "CLAW device %.8s: System validate"
2106 " completed.\n", temp_ws_name);
2107 dev_info(tdev,
2108 "%s: sys Validate Rsize:%d Wsize:%d\n",
2109 dev->name, p_sysval->read_frame_size,
2110 p_sysval->write_frame_size);
2111 privptr->system_validate_comp = 1;
2112 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2113 p_env->packing = PACKING_ASK;
2114 claw_strt_conn_req(dev);
2115 break;
2116 case SYSTEM_VALIDATE_RESPONSE:
2117 p_sysval = (struct sysval *)&(p_ctlbk->data);
2118 dev_info(tdev,
2119 "Settings for %s validated (version=%d, "
2120 "remote device=%d, rc=%d, adapter name=%.8s, "
2121 "host name=%.8s)\n",
2122 dev->name,
2123 p_ctlbk->version,
2124 p_ctlbk->correlator,
2125 p_ctlbk->rc,
2126 p_sysval->WS_name,
2127 p_sysval->host_name);
2128 switch (p_ctlbk->rc) {
2129 case 0:
2130 dev_info(tdev, "%s: CLAW device "
2131 "%.8s: System validate completed.\n",
2132 dev->name, temp_ws_name);
2133 if (privptr->system_validate_comp == 0)
2134 claw_strt_conn_req(dev);
2135 privptr->system_validate_comp = 1;
2136 break;
2137 case CLAW_RC_NAME_MISMATCH:
2138 dev_warn(tdev, "Validating %s failed because of"
2139 " a host or adapter name mismatch\n",
2140 dev->name);
2141 break;
2142 case CLAW_RC_WRONG_VERSION:
2143 dev_warn(tdev, "Validating %s failed because of a"
2144 " version conflict\n",
2145 dev->name);
2146 break;
2147 case CLAW_RC_HOST_RCV_TOO_SMALL:
2148 dev_warn(tdev, "Validating %s failed because of a"
2149 " frame size conflict\n",
2150 dev->name);
2151 break;
2152 default:
2153 dev_warn(tdev, "The communication peer of %s rejected"
2154 " the connection\n",
2155 dev->name);
2156 break;
2157 }
2158 break;
2159
2160 case CONNECTION_REQUEST:
2161 p_connect = (struct conncmd *)&(p_ctlbk->data);
2162 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2163 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2164 dev->name,
2165 p_ctlbk->version,
2166 p_ctlbk->linkid,
2167 p_ctlbk->correlator,
2168 p_connect->host_name,
2169 p_connect->WS_name);
2170 if (privptr->active_link_ID != 0) {
2171 claw_snd_disc(dev, p_ctlbk);
2172 dev_info(tdev, "%s rejected a connection request"
2173 " because it is already active\n",
2174 dev->name);
2175 }
2176 if (p_ctlbk->linkid != 1) {
2177 claw_snd_disc(dev, p_ctlbk);
2178 dev_info(tdev, "%s rejected a request to open multiple"
2179 " connections\n",
2180 dev->name);
2181 }
2182 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2183 if (rc != 0) {
2184 claw_snd_disc(dev, p_ctlbk);
2185 dev_info(tdev, "%s rejected a connection request"
2186 " because of a type mismatch\n",
2187 dev->name);
2188 }
2189 claw_send_control(dev,
2190 CONNECTION_CONFIRM, p_ctlbk->linkid,
2191 p_ctlbk->correlator,
2192 0, p_connect->host_name,
2193 p_connect->WS_name);
2194 if (p_env->packing == PACKING_ASK) {
2195 p_env->packing = PACK_SEND;
2196 claw_snd_conn_req(dev, 0);
2197 }
2198 dev_info(tdev, "%s: CLAW device %.8s: Connection "
2199 "completed link_id=%d.\n",
2200 dev->name, temp_ws_name,
2201 p_ctlbk->linkid);
2202 privptr->active_link_ID = p_ctlbk->linkid;
2203 p_ch = &privptr->channel[WRITE];
2204 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2205 break;
2206 case CONNECTION_RESPONSE:
2207 p_connect = (struct conncmd *)&(p_ctlbk->data);
2208 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2209 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2210 dev->name,
2211 p_ctlbk->version,
2212 p_ctlbk->linkid,
2213 p_ctlbk->correlator,
2214 p_ctlbk->rc,
2215 p_connect->host_name,
2216 p_connect->WS_name);
2217
2218 if (p_ctlbk->rc != 0) {
2219 dev_warn(tdev, "The communication peer of %s rejected"
2220 " a connection request\n",
2221 dev->name);
2222 return 1;
2223 }
2224 rc = find_link(dev,
2225 p_connect->host_name, p_connect->WS_name);
2226 if (rc != 0) {
2227 claw_snd_disc(dev, p_ctlbk);
2228 dev_warn(tdev, "The communication peer of %s"
2229 " rejected a connection "
2230 "request because of a type mismatch\n",
2231 dev->name);
2232 }
2233 /* should be until CONNECTION_CONFIRM */
2234 privptr->active_link_ID = -(p_ctlbk->linkid);
2235 break;
2236 case CONNECTION_CONFIRM:
2237 p_connect = (struct conncmd *)&(p_ctlbk->data);
2238 dev_info(tdev,
2239 "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
2240 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2241 dev->name,
2242 p_ctlbk->version,
2243 p_ctlbk->linkid,
2244 p_ctlbk->correlator,
2245 p_connect->host_name,
2246 p_connect->WS_name);
2247 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2248 privptr->active_link_ID = p_ctlbk->linkid;
2249 if (p_env->packing > PACKING_ASK) {
2250 dev_info(tdev,
2251 "%s: Confirmed Now packing\n", dev->name);
2252 p_env->packing = DO_PACKED;
2253 }
2254 p_ch = &privptr->channel[WRITE];
2255 wake_up(&p_ch->wait);
2256 } else {
2257 dev_warn(tdev, "Activating %s failed because of"
2258 " an incorrect link ID=%d\n",
2259 dev->name, p_ctlbk->linkid);
2260 claw_snd_disc(dev, p_ctlbk);
2261 }
2262 break;
2263 case DISCONNECT:
2264 dev_info(tdev, "%s: Disconnect: "
2265 "Vers=%d,link_id=%d,Corr=%d\n",
2266 dev->name, p_ctlbk->version,
2267 p_ctlbk->linkid, p_ctlbk->correlator);
2268 if ((p_ctlbk->linkid == 2) &&
2269 (p_env->packing == PACK_SEND)) {
2270 privptr->active_link_ID = 1;
2271 p_env->packing = DO_PACKED;
2272 } else
2273 privptr->active_link_ID = 0;
2274 break;
2275 case CLAW_ERROR:
2276 dev_warn(tdev, "The communication peer of %s failed\n",
2277 dev->name);
2278 break;
2279 default:
2280 dev_warn(tdev, "The communication peer of %s sent"
2281 " an unknown command code\n",
2282 dev->name);
2283 break;
2284 }
2285
2286 return 0;
2287 } /* end of claw_process_control */
2288
2289
2290 /*-------------------------------------------------------------------*
2291 * claw_send_control *
2292 * *
2293 *--------------------------------------------------------------------*/
2294
2295 static int
2296 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2297 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2298 {
2299 struct claw_privbk *privptr;
2300 struct clawctl *p_ctl;
2301 struct sysval *p_sysval;
2302 struct conncmd *p_connect;
2303 struct sk_buff *skb;
2304
2305 CLAW_DBF_TEXT(2, setup, "sndcntl");
2306 privptr = dev->ml_priv;
2307 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2308
2309 p_ctl->command=type;
2310 p_ctl->version=CLAW_VERSION_ID;
2311 p_ctl->linkid=link;
2312 p_ctl->correlator=correlator;
2313 p_ctl->rc=rc;
2314
2315 p_sysval=(struct sysval *)&p_ctl->data;
2316 p_connect=(struct conncmd *)&p_ctl->data;
2317
2318 switch (p_ctl->command) {
2319 case SYSTEM_VALIDATE_REQUEST:
2320 case SYSTEM_VALIDATE_RESPONSE:
2321 memcpy(&p_sysval->host_name, local_name, 8);
2322 memcpy(&p_sysval->WS_name, remote_name, 8);
2323 if (privptr->p_env->packing > 0) {
2324 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2325 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2326 } else {
2327 /* how big is the biggest group of packets */
2328 p_sysval->read_frame_size =
2329 privptr->p_env->read_size;
2330 p_sysval->write_frame_size =
2331 privptr->p_env->write_size;
2332 }
2333 memset(&p_sysval->reserved, 0x00, 4);
2334 break;
2335 case CONNECTION_REQUEST:
2336 case CONNECTION_RESPONSE:
2337 case CONNECTION_CONFIRM:
2338 case DISCONNECT:
2339 memcpy(&p_sysval->host_name, local_name, 8);
2340 memcpy(&p_sysval->WS_name, remote_name, 8);
2341 if (privptr->p_env->packing > 0) {
2342 /* How big is the biggest packet */
2343 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2344 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2345 } else {
2346 memset(&p_connect->reserved1, 0x00, 4);
2347 memset(&p_connect->reserved2, 0x00, 4);
2348 }
2349 break;
2350 default:
2351 break;
2352 }
2353
2354 /* write Control Record to the device */
2355
2356
2357 skb = dev_alloc_skb(sizeof(struct clawctl));
2358 if (!skb) {
2359 return -ENOMEM;
2360 }
2361 memcpy(skb_put(skb, sizeof(struct clawctl)),
2362 p_ctl, sizeof(struct clawctl));
2363 if (privptr->p_env->packing >= PACK_SEND)
2364 claw_hw_tx(skb, dev, 1);
2365 else
2366 claw_hw_tx(skb, dev, 0);
2367 return 0;
2368 } /* end of claw_send_control */
2369
2370 /*-------------------------------------------------------------------*
2371 * claw_snd_conn_req *
2372 * *
2373 *--------------------------------------------------------------------*/
2374 static int
2375 claw_snd_conn_req(struct net_device *dev, __u8 link)
2376 {
2377 int rc;
2378 struct claw_privbk *privptr = dev->ml_priv;
2379 struct clawctl *p_ctl;
2380
2381 CLAW_DBF_TEXT(2, setup, "snd_conn");
2382 rc = 1;
2383 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2384 p_ctl->linkid = link;
2385 if ( privptr->system_validate_comp==0x00 ) {
2386 return rc;
2387 }
2388 if (privptr->p_env->packing == PACKING_ASK )
2389 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2390 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2391 if (privptr->p_env->packing == PACK_SEND) {
2392 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2393 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2394 }
2395 if (privptr->p_env->packing == 0)
2396 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2397 HOST_APPL_NAME, privptr->p_env->api_type);
2398 return rc;
2399
2400 } /* end of claw_snd_conn_req */
2401
2402
2403 /*-------------------------------------------------------------------*
2404 * claw_snd_disc *
2405 * *
2406 *--------------------------------------------------------------------*/
2407
2408 static int
2409 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2410 {
2411 int rc;
2412 struct conncmd * p_connect;
2413
2414 CLAW_DBF_TEXT(2, setup, "snd_dsc");
2415 p_connect=(struct conncmd *)&p_ctl->data;
2416
2417 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2418 p_ctl->correlator, 0,
2419 p_connect->host_name, p_connect->WS_name);
2420 return rc;
2421 } /* end of claw_snd_disc */
2422
2423
2424 /*-------------------------------------------------------------------*
2425 * claw_snd_sys_validate_rsp *
2426 * *
2427 *--------------------------------------------------------------------*/
2428
2429 static int
2430 claw_snd_sys_validate_rsp(struct net_device *dev,
2431 struct clawctl *p_ctl, __u32 return_code)
2432 {
2433 struct claw_env * p_env;
2434 struct claw_privbk *privptr;
2435 int rc;
2436
2437 CLAW_DBF_TEXT(2, setup, "chkresp");
2438 privptr = dev->ml_priv;
2439 p_env=privptr->p_env;
2440 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2441 p_ctl->linkid,
2442 p_ctl->correlator,
2443 return_code,
2444 p_env->host_name,
2445 p_env->adapter_name );
2446 return rc;
2447 } /* end of claw_snd_sys_validate_rsp */
2448
2449 /*-------------------------------------------------------------------*
2450 * claw_strt_conn_req *
2451 * *
2452 *--------------------------------------------------------------------*/
2453
2454 static int
2455 claw_strt_conn_req(struct net_device *dev )
2456 {
2457 int rc;
2458
2459 CLAW_DBF_TEXT(2, setup, "conn_req");
2460 rc=claw_snd_conn_req(dev, 1);
2461 return rc;
2462 } /* end of claw_strt_conn_req */
2463
2464
2465
2466 /*-------------------------------------------------------------------*
2467 * claw_stats *
2468 *-------------------------------------------------------------------*/
2469
2470 static struct
2471 net_device_stats *claw_stats(struct net_device *dev)
2472 {
2473 struct claw_privbk *privptr;
2474
2475 CLAW_DBF_TEXT(4, trace, "stats");
2476 privptr = dev->ml_priv;
2477 return &privptr->stats;
2478 } /* end of claw_stats */
2479
2480
2481 /*-------------------------------------------------------------------*
2482 * unpack_read *
2483 * *
2484 *--------------------------------------------------------------------*/
2485 static void
2486 unpack_read(struct net_device *dev )
2487 {
2488 struct sk_buff *skb;
2489 struct claw_privbk *privptr;
2490 struct claw_env *p_env;
2491 struct ccwbk *p_this_ccw;
2492 struct ccwbk *p_first_ccw;
2493 struct ccwbk *p_last_ccw;
2494 struct clawph *p_packh;
2495 void *p_packd;
2496 struct clawctl *p_ctlrec=NULL;
2497 struct device *p_dev;
2498
2499 __u32 len_of_data;
2500 __u32 pack_off;
2501 __u8 link_num;
2502 __u8 mtc_this_frm=0;
2503 __u32 bytes_to_mov;
2504 int i=0;
2505 int p=0;
2506
2507 CLAW_DBF_TEXT(4, trace, "unpkread");
2508 p_first_ccw=NULL;
2509 p_last_ccw=NULL;
2510 p_packh=NULL;
2511 p_packd=NULL;
2512 privptr = dev->ml_priv;
2513
2514 p_dev = &privptr->channel[READ].cdev->dev;
2515 p_env = privptr->p_env;
2516 p_this_ccw=privptr->p_read_active_first;
2517 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2518 pack_off = 0;
2519 p = 0;
2520 p_this_ccw->header.flag=CLAW_PENDING;
2521 privptr->p_read_active_first=p_this_ccw->next;
2522 p_this_ccw->next=NULL;
2523 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2524 if ((p_env->packing == PACK_SEND) &&
2525 (p_packh->len == 32) &&
2526 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2527 p_packh++; /* peek past pack header */
2528 p_ctlrec = (struct clawctl *)p_packh;
2529 p_packh--; /* un peek */
2530 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2531 (p_ctlrec->command == CONNECTION_CONFIRM))
2532 p_env->packing = DO_PACKED;
2533 }
2534 if (p_env->packing == DO_PACKED)
2535 link_num=p_packh->link_num;
2536 else
2537 link_num=p_this_ccw->header.opcode / 8;
2538 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2539 mtc_this_frm=1;
2540 if (p_this_ccw->header.length!=
2541 privptr->p_env->read_size ) {
2542 dev_warn(p_dev,
2543 "The communication peer of %s"
2544 " sent a faulty"
2545 " frame of length %02x\n",
2546 dev->name, p_this_ccw->header.length);
2547 }
2548 }
2549
2550 if (privptr->mtc_skipping) {
2551 /*
2552 * We're in the mode of skipping past a
2553 * multi-frame message
2554 * that we can't process for some reason or other.
2555 * The first frame without the More-To-Come flag is
2556 * the last frame of the skipped message.
2557 */
2558 /* in case of More-To-Come not set in this frame */
2559 if (mtc_this_frm==0) {
2560 privptr->mtc_skipping=0; /* Ok, the end */
2561 privptr->mtc_logical_link=-1;
2562 }
2563 goto NextFrame;
2564 }
2565
2566 if (link_num==0) {
2567 claw_process_control(dev, p_this_ccw);
2568 CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2569 goto NextFrame;
2570 }
2571 unpack_next:
2572 if (p_env->packing == DO_PACKED) {
2573 if (pack_off > p_env->read_size)
2574 goto NextFrame;
2575 p_packd = p_this_ccw->p_buffer+pack_off;
2576 p_packh = (struct clawph *) p_packd;
2577 if ((p_packh->len == 0) || /* done with this frame? */
2578 (p_packh->flag != 0))
2579 goto NextFrame;
2580 bytes_to_mov = p_packh->len;
2581 pack_off += bytes_to_mov+sizeof(struct clawph);
2582 p++;
2583 } else {
2584 bytes_to_mov=p_this_ccw->header.length;
2585 }
2586 if (privptr->mtc_logical_link<0) {
2587
2588 /*
2589 * if More-To-Come is set in this frame then we don't know
2590 * length of entire message, and hence have to allocate
2591 * large buffer */
2592
2593 /* We are starting a new envelope */
2594 privptr->mtc_offset=0;
2595 privptr->mtc_logical_link=link_num;
2596 }
2597
2598 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2599 /* error */
2600 privptr->stats.rx_frame_errors++;
2601 goto NextFrame;
2602 }
2603 if (p_env->packing == DO_PACKED) {
2604 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2605 p_packd+sizeof(struct clawph), bytes_to_mov);
2606
2607 } else {
2608 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2609 p_this_ccw->p_buffer, bytes_to_mov);
2610 }
2611 if (mtc_this_frm==0) {
2612 len_of_data=privptr->mtc_offset+bytes_to_mov;
2613 skb=dev_alloc_skb(len_of_data);
2614 if (skb) {
2615 memcpy(skb_put(skb,len_of_data),
2616 privptr->p_mtc_envelope,
2617 len_of_data);
2618 skb->dev=dev;
2619 skb_reset_mac_header(skb);
2620 skb->protocol=htons(ETH_P_IP);
2621 skb->ip_summed=CHECKSUM_UNNECESSARY;
2622 privptr->stats.rx_packets++;
2623 privptr->stats.rx_bytes+=len_of_data;
2624 netif_rx(skb);
2625 }
2626 else {
2627 dev_info(p_dev, "Allocating a buffer for"
2628 " incoming data failed\n");
2629 privptr->stats.rx_dropped++;
2630 }
2631 privptr->mtc_offset=0;
2632 privptr->mtc_logical_link=-1;
2633 }
2634 else {
2635 privptr->mtc_offset+=bytes_to_mov;
2636 }
2637 if (p_env->packing == DO_PACKED)
2638 goto unpack_next;
2639 NextFrame:
2640 /*
2641 * Remove ThisCCWblock from active read queue, and add it
2642 * to queue of free blocks to be reused.
2643 */
2644 i++;
2645 p_this_ccw->header.length=0xffff;
2646 p_this_ccw->header.opcode=0xff;
2647 /*
2648 * add this one to the free queue for later reuse
2649 */
2650 if (p_first_ccw==NULL) {
2651 p_first_ccw = p_this_ccw;
2652 }
2653 else {
2654 p_last_ccw->next = p_this_ccw;
2655 }
2656 p_last_ccw = p_this_ccw;
2657 /*
2658 * chain to next block on active read queue
2659 */
2660 p_this_ccw = privptr->p_read_active_first;
2661 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2662 } /* end of while */
2663
2664 /* check validity */
2665
2666 CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2667 add_claw_reads(dev, p_first_ccw, p_last_ccw);
2668 claw_strt_read(dev, LOCK_YES);
2669 return;
2670 } /* end of unpack_read */
2671
2672 /*-------------------------------------------------------------------*
2673 * claw_strt_read *
2674 * *
2675 *--------------------------------------------------------------------*/
2676 static void
2677 claw_strt_read (struct net_device *dev, int lock )
2678 {
2679 int rc = 0;
2680 __u32 parm;
2681 unsigned long saveflags = 0;
2682 struct claw_privbk *privptr = dev->ml_priv;
2683 struct ccwbk*p_ccwbk;
2684 struct chbk *p_ch;
2685 struct clawh *p_clawh;
2686 p_ch=&privptr->channel[READ];
2687
2688 CLAW_DBF_TEXT(4, trace, "StRdNter");
2689 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2690 p_clawh->flag=CLAW_IDLE; /* 0x00 */
2691
2692 if ((privptr->p_write_active_first!=NULL &&
2693 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2694 (privptr->p_read_active_first!=NULL &&
2695 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2696 p_clawh->flag=CLAW_BUSY; /* 0xff */
2697 }
2698 if (lock==LOCK_YES) {
2699 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2700 }
2701 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2702 CLAW_DBF_TEXT(4, trace, "HotRead");
2703 p_ccwbk=privptr->p_read_active_first;
2704 parm = (unsigned long) p_ch;
2705 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2706 0xff, 0);
2707 if (rc != 0) {
2708 ccw_check_return_code(p_ch->cdev, rc);
2709 }
2710 }
2711 else {
2712 CLAW_DBF_TEXT(2, trace, "ReadAct");
2713 }
2714
2715 if (lock==LOCK_YES) {
2716 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2717 }
2718 CLAW_DBF_TEXT(4, trace, "StRdExit");
2719 return;
2720 } /* end of claw_strt_read */
2721
2722 /*-------------------------------------------------------------------*
2723 * claw_strt_out_IO *
2724 * *
2725 *--------------------------------------------------------------------*/
2726
2727 static void
2728 claw_strt_out_IO( struct net_device *dev )
2729 {
2730 int rc = 0;
2731 unsigned long parm;
2732 struct claw_privbk *privptr;
2733 struct chbk *p_ch;
2734 struct ccwbk *p_first_ccw;
2735
2736 if (!dev) {
2737 return;
2738 }
2739 privptr = (struct claw_privbk *)dev->ml_priv;
2740 p_ch=&privptr->channel[WRITE];
2741
2742 CLAW_DBF_TEXT(4, trace, "strt_io");
2743 p_first_ccw=privptr->p_write_active_first;
2744
2745 if (p_ch->claw_state == CLAW_STOP)
2746 return;
2747 if (p_first_ccw == NULL) {
2748 return;
2749 }
2750 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2751 parm = (unsigned long) p_ch;
2752 CLAW_DBF_TEXT(2, trace, "StWrtIO");
2753 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2754 0xff, 0);
2755 if (rc != 0) {
2756 ccw_check_return_code(p_ch->cdev, rc);
2757 }
2758 }
2759 dev->trans_start = jiffies;
2760 return;
2761 } /* end of claw_strt_out_IO */
2762
2763 /*-------------------------------------------------------------------*
2764 * Free write buffers *
2765 * *
2766 *--------------------------------------------------------------------*/
2767
2768 static void
2769 claw_free_wrt_buf( struct net_device *dev )
2770 {
2771
2772 struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2773 struct ccwbk*p_first_ccw;
2774 struct ccwbk*p_last_ccw;
2775 struct ccwbk*p_this_ccw;
2776 struct ccwbk*p_next_ccw;
2777
2778 CLAW_DBF_TEXT(4, trace, "freewrtb");
2779 /* scan the write queue to free any completed write packets */
2780 p_first_ccw=NULL;
2781 p_last_ccw=NULL;
2782 p_this_ccw=privptr->p_write_active_first;
2783 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2784 {
2785 p_next_ccw = p_this_ccw->next;
2786 if (((p_next_ccw!=NULL) &&
2787 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2788 ((p_this_ccw == privptr->p_write_active_last) &&
2789 (p_this_ccw->header.flag!=CLAW_PENDING))) {
2790 /* The next CCW is OK or this is */
2791 /* the last CCW...free it @A1A */
2792 privptr->p_write_active_first=p_this_ccw->next;
2793 p_this_ccw->header.flag=CLAW_PENDING;
2794 p_this_ccw->next=privptr->p_write_free_chain;
2795 privptr->p_write_free_chain=p_this_ccw;
2796 ++privptr->write_free_count;
2797 privptr->stats.tx_bytes+= p_this_ccw->write.count;
2798 p_this_ccw=privptr->p_write_active_first;
2799 privptr->stats.tx_packets++;
2800 }
2801 else {
2802 break;
2803 }
2804 }
2805 if (privptr->write_free_count!=0) {
2806 claw_clearbit_busy(TB_NOBUFFER,dev);
2807 }
2808 /* whole chain removed? */
2809 if (privptr->p_write_active_first==NULL) {
2810 privptr->p_write_active_last=NULL;
2811 }
2812 CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2813 return;
2814 }
2815
2816 /*-------------------------------------------------------------------*
2817 * claw free netdevice *
2818 * *
2819 *--------------------------------------------------------------------*/
2820 static void
2821 claw_free_netdevice(struct net_device * dev, int free_dev)
2822 {
2823 struct claw_privbk *privptr;
2824
2825 CLAW_DBF_TEXT(2, setup, "free_dev");
2826 if (!dev)
2827 return;
2828 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2829 privptr = dev->ml_priv;
2830 if (dev->flags & IFF_RUNNING)
2831 claw_release(dev);
2832 if (privptr) {
2833 privptr->channel[READ].ndev = NULL; /* say it's free */
2834 }
2835 dev->ml_priv = NULL;
2836 #ifdef MODULE
2837 if (free_dev) {
2838 free_netdev(dev);
2839 }
2840 #endif
2841 CLAW_DBF_TEXT(2, setup, "free_ok");
2842 }
2843
2844 /**
2845 * Claw init netdevice
2846 * Initialize everything of the net device except the name and the
2847 * channel structs.
2848 */
2849 static const struct net_device_ops claw_netdev_ops = {
2850 .ndo_open = claw_open,
2851 .ndo_stop = claw_release,
2852 .ndo_get_stats = claw_stats,
2853 .ndo_start_xmit = claw_tx,
2854 .ndo_change_mtu = claw_change_mtu,
2855 };
2856
2857 static void
2858 claw_init_netdevice(struct net_device * dev)
2859 {
2860 CLAW_DBF_TEXT(2, setup, "init_dev");
2861 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2862 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2863 dev->hard_header_len = 0;
2864 dev->addr_len = 0;
2865 dev->type = ARPHRD_SLIP;
2866 dev->tx_queue_len = 1300;
2867 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2868 dev->netdev_ops = &claw_netdev_ops;
2869 CLAW_DBF_TEXT(2, setup, "initok");
2870 return;
2871 }
2872
2873 /**
2874 * Init a new channel in the privptr->channel[i].
2875 *
2876 * @param cdev The ccw_device to be added.
2877 *
2878 * @return 0 on success, !0 on error.
2879 */
2880 static int
2881 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2882 {
2883 struct chbk *p_ch;
2884 struct ccw_dev_id dev_id;
2885
2886 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2887 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2888 p_ch = &privptr->channel[i];
2889 p_ch->cdev = cdev;
2890 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2891 ccw_device_get_id(cdev, &dev_id);
2892 p_ch->devno = dev_id.devno;
2893 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2894 return -ENOMEM;
2895 }
2896 return 0;
2897 }
2898
2899
2900 /**
2901 *
2902 * Setup an interface.
2903 *
2904 * @param cgdev Device to be setup.
2905 *
2906 * @returns 0 on success, !0 on failure.
2907 */
2908 static int
2909 claw_new_device(struct ccwgroup_device *cgdev)
2910 {
2911 struct claw_privbk *privptr;
2912 struct claw_env *p_env;
2913 struct net_device *dev;
2914 int ret;
2915 struct ccw_dev_id dev_id;
2916
2917 dev_info(&cgdev->dev, "add for %s\n",
2918 dev_name(&cgdev->cdev[READ]->dev));
2919 CLAW_DBF_TEXT(2, setup, "new_dev");
2920 privptr = dev_get_drvdata(&cgdev->dev);
2921 dev_set_drvdata(&cgdev->cdev[READ]->dev, privptr);
2922 dev_set_drvdata(&cgdev->cdev[WRITE]->dev, privptr);
2923 if (!privptr)
2924 return -ENODEV;
2925 p_env = privptr->p_env;
2926 ccw_device_get_id(cgdev->cdev[READ], &dev_id);
2927 p_env->devno[READ] = dev_id.devno;
2928 ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
2929 p_env->devno[WRITE] = dev_id.devno;
2930 ret = add_channel(cgdev->cdev[0],0,privptr);
2931 if (ret == 0)
2932 ret = add_channel(cgdev->cdev[1],1,privptr);
2933 if (ret != 0) {
2934 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2935 " failed with error code %d\n", ret);
2936 goto out;
2937 }
2938 ret = ccw_device_set_online(cgdev->cdev[READ]);
2939 if (ret != 0) {
2940 dev_warn(&cgdev->dev,
2941 "Setting the read subchannel online"
2942 " failed with error code %d\n", ret);
2943 goto out;
2944 }
2945 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
2946 if (ret != 0) {
2947 dev_warn(&cgdev->dev,
2948 "Setting the write subchannel online "
2949 "failed with error code %d\n", ret);
2950 goto out;
2951 }
2952 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2953 if (!dev) {
2954 dev_warn(&cgdev->dev,
2955 "Activating the CLAW device failed\n");
2956 goto out;
2957 }
2958 dev->ml_priv = privptr;
2959 dev_set_drvdata(&cgdev->dev, privptr);
2960 dev_set_drvdata(&cgdev->cdev[READ]->dev, privptr);
2961 dev_set_drvdata(&cgdev->cdev[WRITE]->dev, privptr);
2962 /* sysfs magic */
2963 SET_NETDEV_DEV(dev, &cgdev->dev);
2964 if (register_netdev(dev) != 0) {
2965 claw_free_netdevice(dev, 1);
2966 CLAW_DBF_TEXT(2, trace, "regfail");
2967 goto out;
2968 }
2969 dev->flags &=~IFF_RUNNING;
2970 if (privptr->buffs_alloc == 0) {
2971 ret=init_ccw_bk(dev);
2972 if (ret !=0) {
2973 unregister_netdev(dev);
2974 claw_free_netdevice(dev,1);
2975 CLAW_DBF_TEXT(2, trace, "ccwmem");
2976 goto out;
2977 }
2978 }
2979 privptr->channel[READ].ndev = dev;
2980 privptr->channel[WRITE].ndev = dev;
2981 privptr->p_env->ndev = dev;
2982
2983 dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
2984 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
2985 dev->name, p_env->read_size,
2986 p_env->write_size, p_env->read_buffers,
2987 p_env->write_buffers, p_env->devno[READ],
2988 p_env->devno[WRITE]);
2989 dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
2990 ":%.8s api_type: %.8s\n",
2991 dev->name, p_env->host_name,
2992 p_env->adapter_name , p_env->api_type);
2993 return 0;
2994 out:
2995 ccw_device_set_offline(cgdev->cdev[1]);
2996 ccw_device_set_offline(cgdev->cdev[0]);
2997 return -ENODEV;
2998 }
2999
3000 static void
3001 claw_purge_skb_queue(struct sk_buff_head *q)
3002 {
3003 struct sk_buff *skb;
3004
3005 CLAW_DBF_TEXT(4, trace, "purgque");
3006 while ((skb = skb_dequeue(q))) {
3007 atomic_dec(&skb->users);
3008 dev_kfree_skb_any(skb);
3009 }
3010 }
3011
3012 /**
3013 * Shutdown an interface.
3014 *
3015 * @param cgdev Device to be shut down.
3016 *
3017 * @returns 0 on success, !0 on failure.
3018 */
3019 static int
3020 claw_shutdown_device(struct ccwgroup_device *cgdev)
3021 {
3022 struct claw_privbk *priv;
3023 struct net_device *ndev;
3024 int ret;
3025
3026 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3027 priv = dev_get_drvdata(&cgdev->dev);
3028 if (!priv)
3029 return -ENODEV;
3030 ndev = priv->channel[READ].ndev;
3031 if (ndev) {
3032 /* Close the device */
3033 dev_info(&cgdev->dev, "%s: shutting down \n",
3034 ndev->name);
3035 if (ndev->flags & IFF_RUNNING)
3036 ret = claw_release(ndev);
3037 ndev->flags &=~IFF_RUNNING;
3038 unregister_netdev(ndev);
3039 ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
3040 claw_free_netdevice(ndev, 1);
3041 priv->channel[READ].ndev = NULL;
3042 priv->channel[WRITE].ndev = NULL;
3043 priv->p_env->ndev = NULL;
3044 }
3045 ccw_device_set_offline(cgdev->cdev[1]);
3046 ccw_device_set_offline(cgdev->cdev[0]);
3047 return 0;
3048 }
3049
3050 static void
3051 claw_remove_device(struct ccwgroup_device *cgdev)
3052 {
3053 struct claw_privbk *priv;
3054
3055 BUG_ON(!cgdev);
3056 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3057 priv = dev_get_drvdata(&cgdev->dev);
3058 BUG_ON(!priv);
3059 dev_info(&cgdev->dev, " will be removed.\n");
3060 if (cgdev->state == CCWGROUP_ONLINE)
3061 claw_shutdown_device(cgdev);
3062 claw_remove_files(&cgdev->dev);
3063 kfree(priv->p_mtc_envelope);
3064 priv->p_mtc_envelope=NULL;
3065 kfree(priv->p_env);
3066 priv->p_env=NULL;
3067 kfree(priv->channel[0].irb);
3068 priv->channel[0].irb=NULL;
3069 kfree(priv->channel[1].irb);
3070 priv->channel[1].irb=NULL;
3071 kfree(priv);
3072 dev_set_drvdata(&cgdev->dev, NULL);
3073 dev_set_drvdata(&cgdev->cdev[READ]->dev, NULL);
3074 dev_set_drvdata(&cgdev->cdev[WRITE]->dev, NULL);
3075 put_device(&cgdev->dev);
3076
3077 return;
3078 }
3079
3080
3081 /*
3082 * sysfs attributes
3083 */
3084 static ssize_t
3085 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3086 {
3087 struct claw_privbk *priv;
3088 struct claw_env * p_env;
3089
3090 priv = dev_get_drvdata(dev);
3091 if (!priv)
3092 return -ENODEV;
3093 p_env = priv->p_env;
3094 return sprintf(buf, "%s\n",p_env->host_name);
3095 }
3096
3097 static ssize_t
3098 claw_hname_write(struct device *dev, struct device_attribute *attr,
3099 const char *buf, size_t count)
3100 {
3101 struct claw_privbk *priv;
3102 struct claw_env * p_env;
3103
3104 priv = dev_get_drvdata(dev);
3105 if (!priv)
3106 return -ENODEV;
3107 p_env = priv->p_env;
3108 if (count > MAX_NAME_LEN+1)
3109 return -EINVAL;
3110 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3111 strncpy(p_env->host_name,buf, count);
3112 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3113 p_env->host_name[MAX_NAME_LEN] = 0x00;
3114 CLAW_DBF_TEXT(2, setup, "HstnSet");
3115 CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3116
3117 return count;
3118 }
3119
3120 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3121
3122 static ssize_t
3123 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3124 {
3125 struct claw_privbk *priv;
3126 struct claw_env * p_env;
3127
3128 priv = dev_get_drvdata(dev);
3129 if (!priv)
3130 return -ENODEV;
3131 p_env = priv->p_env;
3132 return sprintf(buf, "%s\n", p_env->adapter_name);
3133 }
3134
3135 static ssize_t
3136 claw_adname_write(struct device *dev, struct device_attribute *attr,
3137 const char *buf, size_t count)
3138 {
3139 struct claw_privbk *priv;
3140 struct claw_env * p_env;
3141
3142 priv = dev_get_drvdata(dev);
3143 if (!priv)
3144 return -ENODEV;
3145 p_env = priv->p_env;
3146 if (count > MAX_NAME_LEN+1)
3147 return -EINVAL;
3148 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3149 strncpy(p_env->adapter_name,buf, count);
3150 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3151 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3152 CLAW_DBF_TEXT(2, setup, "AdnSet");
3153 CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3154
3155 return count;
3156 }
3157
3158 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3159
3160 static ssize_t
3161 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3162 {
3163 struct claw_privbk *priv;
3164 struct claw_env * p_env;
3165
3166 priv = dev_get_drvdata(dev);
3167 if (!priv)
3168 return -ENODEV;
3169 p_env = priv->p_env;
3170 return sprintf(buf, "%s\n",
3171 p_env->api_type);
3172 }
3173
3174 static ssize_t
3175 claw_apname_write(struct device *dev, struct device_attribute *attr,
3176 const char *buf, size_t count)
3177 {
3178 struct claw_privbk *priv;
3179 struct claw_env * p_env;
3180
3181 priv = dev_get_drvdata(dev);
3182 if (!priv)
3183 return -ENODEV;
3184 p_env = priv->p_env;
3185 if (count > MAX_NAME_LEN+1)
3186 return -EINVAL;
3187 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3188 strncpy(p_env->api_type,buf, count);
3189 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3190 p_env->api_type[MAX_NAME_LEN] = 0x00;
3191 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3192 p_env->read_size=DEF_PACK_BUFSIZE;
3193 p_env->write_size=DEF_PACK_BUFSIZE;
3194 p_env->packing=PACKING_ASK;
3195 CLAW_DBF_TEXT(2, setup, "PACKING");
3196 }
3197 else {
3198 p_env->packing=0;
3199 p_env->read_size=CLAW_FRAME_SIZE;
3200 p_env->write_size=CLAW_FRAME_SIZE;
3201 CLAW_DBF_TEXT(2, setup, "ApiSet");
3202 }
3203 CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3204 return count;
3205 }
3206
3207 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3208
3209 static ssize_t
3210 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3211 {
3212 struct claw_privbk *priv;
3213 struct claw_env * p_env;
3214
3215 priv = dev_get_drvdata(dev);
3216 if (!priv)
3217 return -ENODEV;
3218 p_env = priv->p_env;
3219 return sprintf(buf, "%d\n", p_env->write_buffers);
3220 }
3221
3222 static ssize_t
3223 claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3224 const char *buf, size_t count)
3225 {
3226 struct claw_privbk *priv;
3227 struct claw_env * p_env;
3228 int nnn,max;
3229
3230 priv = dev_get_drvdata(dev);
3231 if (!priv)
3232 return -ENODEV;
3233 p_env = priv->p_env;
3234 sscanf(buf, "%i", &nnn);
3235 if (p_env->packing) {
3236 max = 64;
3237 }
3238 else {
3239 max = 512;
3240 }
3241 if ((nnn > max ) || (nnn < 2))
3242 return -EINVAL;
3243 p_env->write_buffers = nnn;
3244 CLAW_DBF_TEXT(2, setup, "Wbufset");
3245 CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3246 return count;
3247 }
3248
3249 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3250
3251 static ssize_t
3252 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3253 {
3254 struct claw_privbk *priv;
3255 struct claw_env * p_env;
3256
3257 priv = dev_get_drvdata(dev);
3258 if (!priv)
3259 return -ENODEV;
3260 p_env = priv->p_env;
3261 return sprintf(buf, "%d\n", p_env->read_buffers);
3262 }
3263
3264 static ssize_t
3265 claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3266 const char *buf, size_t count)
3267 {
3268 struct claw_privbk *priv;
3269 struct claw_env *p_env;
3270 int nnn,max;
3271
3272 priv = dev_get_drvdata(dev);
3273 if (!priv)
3274 return -ENODEV;
3275 p_env = priv->p_env;
3276 sscanf(buf, "%i", &nnn);
3277 if (p_env->packing) {
3278 max = 64;
3279 }
3280 else {
3281 max = 512;
3282 }
3283 if ((nnn > max ) || (nnn < 2))
3284 return -EINVAL;
3285 p_env->read_buffers = nnn;
3286 CLAW_DBF_TEXT(2, setup, "Rbufset");
3287 CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3288 return count;
3289 }
3290
3291 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3292
3293 static struct attribute *claw_attr[] = {
3294 &dev_attr_read_buffer.attr,
3295 &dev_attr_write_buffer.attr,
3296 &dev_attr_adapter_name.attr,
3297 &dev_attr_api_type.attr,
3298 &dev_attr_host_name.attr,
3299 NULL,
3300 };
3301
3302 static struct attribute_group claw_attr_group = {
3303 .attrs = claw_attr,
3304 };
3305
3306 static int
3307 claw_add_files(struct device *dev)
3308 {
3309 CLAW_DBF_TEXT(2, setup, "add_file");
3310 return sysfs_create_group(&dev->kobj, &claw_attr_group);
3311 }
3312
3313 static void
3314 claw_remove_files(struct device *dev)
3315 {
3316 CLAW_DBF_TEXT(2, setup, "rem_file");
3317 sysfs_remove_group(&dev->kobj, &claw_attr_group);
3318 }
3319
3320 /*--------------------------------------------------------------------*
3321 * claw_init and cleanup *
3322 *---------------------------------------------------------------------*/
3323
3324 static void __exit
3325 claw_cleanup(void)
3326 {
3327 unregister_cu3088_discipline(&claw_group_driver);
3328 claw_unregister_debug_facility();
3329 pr_info("Driver unloaded\n");
3330
3331 }
3332
3333 /**
3334 * Initialize module.
3335 * This is called just after the module is loaded.
3336 *
3337 * @return 0 on success, !0 on error.
3338 */
3339 static int __init
3340 claw_init(void)
3341 {
3342 int ret = 0;
3343
3344 pr_info("Loading %s\n", version);
3345 ret = claw_register_debug_facility();
3346 if (ret) {
3347 pr_err("Registering with the S/390 debug feature"
3348 " failed with error code %d\n", ret);
3349 return ret;
3350 }
3351 CLAW_DBF_TEXT(2, setup, "init_mod");
3352 ret = register_cu3088_discipline(&claw_group_driver);
3353 if (ret) {
3354 CLAW_DBF_TEXT(2, setup, "init_bad");
3355 claw_unregister_debug_facility();
3356 pr_err("Registering with the cu3088 device driver failed "
3357 "with error code %d\n", ret);
3358 }
3359 return ret;
3360 }
3361
3362 module_init(claw_init);
3363 module_exit(claw_cleanup);
3364
3365 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3366 MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3367 "Copyright 2000,2008 IBM Corporation\n");
3368 MODULE_LICENSE("GPL");
Linus' kernel tree