Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / 89796f64a20d31e74ee0051df2e26812c852e734 / . / drivers / s390 / net / claw.c
blob: d8a5c229c5a7adc71703417c4a6a84331f3976a4 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]5 * Linux for zSeries version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]6 * Copyright (C) 2002,2005 IBM Corporation
7 * Author(s) Original code written by:
8 * Kazuo Iimura (iimura@jp.ibm.com)
9 * Rewritten by
10 * Andy Richter (richtera@us.ibm.com)
11 * Marc Price (mwprice@us.ibm.com)
12 *
13 * sysfs parms:
14 * group x.x.rrrr,x.x.wwww
15 * read_buffer nnnnnnn
16 * write_buffer nnnnnn
17 * host_name aaaaaaaa
18 * adapter_name aaaaaaaa
19 * api_type aaaaaaaa
20 *
21 * eg.
22 * group 0.0.0200 0.0.0201
23 * read_buffer 25
24 * write_buffer 20
25 * host_name LINUX390
26 * adapter_name RS6K
27 * api_type TCPIP
28 *
29 * where
30 *
31 * The device id is decided by the order entries
32 * are added to the group the first is claw0 the second claw1
33 * up to CLAW_MAX_DEV
34 *
35 * rrrr - the first of 2 consecutive device addresses used for the
36 * CLAW protocol.
37 * The specified address is always used as the input (Read)
38 * channel and the next address is used as the output channel.
39 *
40 * wwww - the second of 2 consecutive device addresses used for
41 * the CLAW protocol.
42 * The specified address is always used as the output
43 * channel and the previous address is used as the input channel.
44 *
45 * read_buffer - specifies number of input buffers to allocate.
46 * write_buffer - specifies number of output buffers to allocate.
47 * host_name - host name
48 * adaptor_name - adaptor name
49 * api_type - API type TCPIP or API will be sent and expected
50 * as ws_name
51 *
52 * Note the following requirements:
53 * 1) host_name must match the configured adapter_name on the remote side
54 * 2) adaptor_name must match the configured host name on the remote side
55 *
56 * Change History
57 * 1.00 Initial release shipped
58 * 1.10 Changes for Buffer allocation
59 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
60 * 1.25 Added Packing support
61 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]62#include <asm/ccwdev.h>
63#include <asm/ccwgroup.h>
64#include <asm/debug.h>
65#include <asm/idals.h>
66#include <asm/io.h>
67
Jiri Slaby1977f032007-10-18 23:40:25 -0700[diff] [blame]68#include <linux/bitops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]69#include <linux/ctype.h>
70#include <linux/delay.h>
71#include <linux/errno.h>
72#include <linux/if_arp.h>
73#include <linux/init.h>
74#include <linux/interrupt.h>
75#include <linux/ip.h>
76#include <linux/kernel.h>
77#include <linux/module.h>
78#include <linux/netdevice.h>
79#include <linux/etherdevice.h>
80#include <linux/proc_fs.h>
81#include <linux/sched.h>
82#include <linux/signal.h>
83#include <linux/skbuff.h>
84#include <linux/slab.h>
85#include <linux/string.h>
86#include <linux/tcp.h>
87#include <linux/timer.h>
88#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]89
90#include "cu3088.h"
91#include "claw.h"
92
93MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
94MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
95 "Copyright 2000,2005 IBM Corporation\n");
96MODULE_LICENSE("GPL");
97
98/* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
99 DEBUGMSG - Enables output of various debug messages in the code
100 IOTRACE - Enables output of CCW and other IO related traces
101 FUNCTRACE - Enables output of function entry/exit trace
102 Define any combination of above options to enable tracing
103
104 CLAW also uses the s390dbf file system see claw_trace and claw_setup
105*/
106
107/* following enables tracing */
108//#define DEBUGMSG
109//#define IOTRACE
110//#define FUNCTRACE
111
112#ifdef DEBUGMSG
113#define DEBUG
114#endif
115
116#ifdef IOTRACE
117#define DEBUG
118#endif
119
120#ifdef FUNCTRACE
121#define DEBUG
122#endif
123
Heiko Carstens2b67fc42007-02-05 21:16:47 +0100[diff] [blame]124static char debug_buffer[255];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]125/**
126 * Debug Facility Stuff
127 */
128static debug_info_t *claw_dbf_setup;
129static debug_info_t *claw_dbf_trace;
130
131/**
132 * CLAW Debug Facility functions
133 */
134static void
135claw_unregister_debug_facility(void)
136{
137 if (claw_dbf_setup)
138 debug_unregister(claw_dbf_setup);
139 if (claw_dbf_trace)
140 debug_unregister(claw_dbf_trace);
141}
142
143static int
144claw_register_debug_facility(void)
145{
Michael Holzheu66a464d2005-06-25 14:55:33 -0700[diff] [blame]146 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
147 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]148 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
149 printk(KERN_WARNING "Not enough memory for debug facility.\n");
150 claw_unregister_debug_facility();
151 return -ENOMEM;
152 }
153 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
154 debug_set_level(claw_dbf_setup, 2);
155 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
156 debug_set_level(claw_dbf_trace, 2);
157 return 0;
158}
159
160static inline void
161claw_set_busy(struct net_device *dev)
162{
163 ((struct claw_privbk *) dev->priv)->tbusy=1;
164 eieio();
165}
166
167static inline void
168claw_clear_busy(struct net_device *dev)
169{
170 clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
171 netif_wake_queue(dev);
172 eieio();
173}
174
175static inline int
176claw_check_busy(struct net_device *dev)
177{
178 eieio();
179 return ((struct claw_privbk *) dev->priv)->tbusy;
180}
181
182static inline void
183claw_setbit_busy(int nr,struct net_device *dev)
184{
185 netif_stop_queue(dev);
186 set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
187}
188
189static inline void
190claw_clearbit_busy(int nr,struct net_device *dev)
191{
192 clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
193 netif_wake_queue(dev);
194}
195
196static inline int
197claw_test_and_setbit_busy(int nr,struct net_device *dev)
198{
199 netif_stop_queue(dev);
200 return test_and_set_bit(nr,
201 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
202}
203
204
205/* Functions for the DEV methods */
206
207static int claw_probe(struct ccwgroup_device *cgdev);
208static void claw_remove_device(struct ccwgroup_device *cgdev);
209static void claw_purge_skb_queue(struct sk_buff_head *q);
210static int claw_new_device(struct ccwgroup_device *cgdev);
211static int claw_shutdown_device(struct ccwgroup_device *cgdev);
212static int claw_tx(struct sk_buff *skb, struct net_device *dev);
213static int claw_change_mtu( struct net_device *dev, int new_mtu);
214static int claw_open(struct net_device *dev);
215static void claw_irq_handler(struct ccw_device *cdev,
216 unsigned long intparm, struct irb *irb);
217static void claw_irq_tasklet ( unsigned long data );
218static int claw_release(struct net_device *dev);
219static void claw_write_retry ( struct chbk * p_ch );
220static void claw_write_next ( struct chbk * p_ch );
221static void claw_timer ( struct chbk * p_ch );
222
223/* Functions */
224static int add_claw_reads(struct net_device *dev,
225 struct ccwbk* p_first, struct ccwbk* p_last);
Heiko Carstens4d284ca2007-02-05 21:18:53 +0100[diff] [blame]226static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
227static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]228static int find_link(struct net_device *dev, char *host_name, char *ws_name );
229static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
230static int init_ccw_bk(struct net_device *dev);
231static void probe_error( struct ccwgroup_device *cgdev);
232static struct net_device_stats *claw_stats(struct net_device *dev);
Heiko Carstens4d284ca2007-02-05 21:18:53 +0100[diff] [blame]233static int pages_to_order_of_mag(int num_of_pages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]234static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
235#ifdef DEBUG
236static void dumpit (char *buf, int len);
237#endif
238/* sysfs Functions */
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]239static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
240static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]241 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]242static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
243static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]244 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]245static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
246static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]247 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]248static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
249static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]250 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]251static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
252static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]253 const char *buf, size_t count);
254static int claw_add_files(struct device *dev);
255static void claw_remove_files(struct device *dev);
256
257/* Functions for System Validate */
258static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
259static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
260 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
261static int claw_snd_conn_req(struct net_device *dev, __u8 link);
262static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
263static int claw_snd_sys_validate_rsp(struct net_device *dev,
264 struct clawctl * p_ctl, __u32 return_code);
265static int claw_strt_conn_req(struct net_device *dev );
266static void claw_strt_read ( struct net_device *dev, int lock );
267static void claw_strt_out_IO( struct net_device *dev );
268static void claw_free_wrt_buf( struct net_device *dev );
269
270/* Functions for unpack reads */
271static void unpack_read (struct net_device *dev );
272
273/* ccwgroup table */
274
275static struct ccwgroup_driver claw_group_driver = {
276 .owner = THIS_MODULE,
277 .name = "claw",
278 .max_slaves = 2,
279 .driver_id = 0xC3D3C1E6,
280 .probe = claw_probe,
281 .remove = claw_remove_device,
282 .set_online = claw_new_device,
283 .set_offline = claw_shutdown_device,
284};
285
286/*
287*
288* Key functions
289*/
290
291/*----------------------------------------------------------------*
292 * claw_probe *
293 * this function is called for each CLAW device. *
294 *----------------------------------------------------------------*/
295static int
296claw_probe(struct ccwgroup_device *cgdev)
297{
298 int rc;
299 struct claw_privbk *privptr=NULL;
300
301#ifdef FUNCTRACE
302 printk(KERN_INFO "%s Enter\n",__FUNCTION__);
303#endif
304 CLAW_DBF_TEXT(2,setup,"probe");
305 if (!get_device(&cgdev->dev))
306 return -ENODEV;
307#ifdef DEBUGMSG
308 printk(KERN_INFO "claw: variable cgdev =\n");
309 dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
310#endif
Eric Sesterhenn88abaab2006-03-24 03:15:31 -0800[diff] [blame]311 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]312 if (privptr == NULL) {
313 probe_error(cgdev);
314 put_device(&cgdev->dev);
315 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
316 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
317 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
318 return -ENOMEM;
319 }
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700[diff] [blame]320 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
321 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]322 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
323 probe_error(cgdev);
324 put_device(&cgdev->dev);
325 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
326 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
327 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
328 return -ENOMEM;
329 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]330 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
331 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
332 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
333 privptr->p_env->packing = 0;
334 privptr->p_env->write_buffers = 5;
335 privptr->p_env->read_buffers = 5;
336 privptr->p_env->read_size = CLAW_FRAME_SIZE;
337 privptr->p_env->write_size = CLAW_FRAME_SIZE;
338 rc = claw_add_files(&cgdev->dev);
339 if (rc) {
340 probe_error(cgdev);
341 put_device(&cgdev->dev);
342 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
343 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
344 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
345 return rc;
346 }
347 printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
348 privptr->p_env->p_priv = privptr;
349 cgdev->cdev[0]->handler = claw_irq_handler;
350 cgdev->cdev[1]->handler = claw_irq_handler;
351 cgdev->dev.driver_data = privptr;
352#ifdef FUNCTRACE
353 printk(KERN_INFO "claw:%s exit on line %d, "
354 "rc = 0\n",__FUNCTION__,__LINE__);
355#endif
356 CLAW_DBF_TEXT(2,setup,"prbext 0");
357
358 return 0;
359} /* end of claw_probe */
360
361/*-------------------------------------------------------------------*
362 * claw_tx *
363 *-------------------------------------------------------------------*/
364
365static int
366claw_tx(struct sk_buff *skb, struct net_device *dev)
367{
368 int rc;
369 struct claw_privbk *privptr=dev->priv;
370 unsigned long saveflags;
371 struct chbk *p_ch;
372
373#ifdef FUNCTRACE
374 printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
375#endif
376 CLAW_DBF_TEXT(4,trace,"claw_tx");
377 p_ch=&privptr->channel[WRITE];
378 if (skb == NULL) {
379 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
380 dev->name);
381 privptr->stats.tx_dropped++;
382#ifdef FUNCTRACE
383 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
384 dev->name,__FUNCTION__, __LINE__);
385#endif
386 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
387 return -EIO;
388 }
389
390#ifdef IOTRACE
391 printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
392 dumpit((char *) skb, sizeof(struct sk_buff));
393 printk(KERN_INFO "%s: variable dev=\n",dev->name);
394 dumpit((char *) dev, sizeof(struct net_device));
395#endif
396 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
397 rc=claw_hw_tx( skb, dev, 1 );
398 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
399#ifdef FUNCTRACE
400 printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
401 dev->name, __FUNCTION__, __LINE__, rc);
402#endif
403 CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
404 return rc;
405} /* end of claw_tx */
406
407/*------------------------------------------------------------------*
408 * pack the collect queue into an skb and return it *
409 * If not packing just return the top skb from the queue *
410 *------------------------------------------------------------------*/
411
412static struct sk_buff *
413claw_pack_skb(struct claw_privbk *privptr)
414{
415 struct sk_buff *new_skb,*held_skb;
416 struct chbk *p_ch = &privptr->channel[WRITE];
417 struct claw_env *p_env = privptr->p_env;
418 int pkt_cnt,pk_ind,so_far;
419
420 new_skb = NULL; /* assume no dice */
421 pkt_cnt = 0;
422 CLAW_DBF_TEXT(4,trace,"PackSKBe");
David S. Millerb03efcf2005-07-08 14:57:23 -0700[diff] [blame]423 if (!skb_queue_empty(&p_ch->collect_queue)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]424 /* some data */
425 held_skb = skb_dequeue(&p_ch->collect_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]426 if (held_skb)
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]427 dev_kfree_skb_any(held_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]428 else
429 return NULL;
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]430 if (p_env->packing != DO_PACKED)
431 return held_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]432 /* get a new SKB we will pack at least one */
433 new_skb = dev_alloc_skb(p_env->write_size);
434 if (new_skb == NULL) {
435 atomic_inc(&held_skb->users);
436 skb_queue_head(&p_ch->collect_queue,held_skb);
437 return NULL;
438 }
439 /* we have packed packet and a place to put it */
440 pk_ind = 1;
441 so_far = 0;
442 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
443 while ((pk_ind) && (held_skb != NULL)) {
444 if (held_skb->len+so_far <= p_env->write_size-8) {
445 memcpy(skb_put(new_skb,held_skb->len),
446 held_skb->data,held_skb->len);
447 privptr->stats.tx_packets++;
448 so_far += held_skb->len;
449 pkt_cnt++;
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]450 dev_kfree_skb_any(held_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]451 held_skb = skb_dequeue(&p_ch->collect_queue);
452 if (held_skb)
453 atomic_dec(&held_skb->users);
454 } else {
455 pk_ind = 0;
456 atomic_inc(&held_skb->users);
457 skb_queue_head(&p_ch->collect_queue,held_skb);
458 }
459 }
460#ifdef IOTRACE
461 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
462 p_env->ndev->name,
463 __FUNCTION__,pkt_cnt,new_skb->len);
464#endif
465 }
466 CLAW_DBF_TEXT(4,trace,"PackSKBx");
467 return new_skb;
468}
469
470/*-------------------------------------------------------------------*
471 * claw_change_mtu *
472 * *
473 *-------------------------------------------------------------------*/
474
475static int
476claw_change_mtu(struct net_device *dev, int new_mtu)
477{
478 struct claw_privbk *privptr=dev->priv;
479 int buff_size;
480#ifdef FUNCTRACE
481 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
482#endif
483#ifdef DEBUGMSG
484 printk(KERN_INFO "variable dev =\n");
485 dumpit((char *) dev, sizeof(struct net_device));
486 printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
487#endif
488 CLAW_DBF_TEXT(4,trace,"setmtu");
489 buff_size = privptr->p_env->write_size;
490 if ((new_mtu < 60) || (new_mtu > buff_size)) {
491#ifdef FUNCTRACE
492 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
493 dev->name,
494 __FUNCTION__, __LINE__);
495#endif
496 return -EINVAL;
497 }
498 dev->mtu = new_mtu;
499#ifdef FUNCTRACE
500 printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
501 __FUNCTION__, __LINE__);
502#endif
503 return 0;
504} /* end of claw_change_mtu */
505
506
507/*-------------------------------------------------------------------*
508 * claw_open *
509 * *
510 *-------------------------------------------------------------------*/
511static int
512claw_open(struct net_device *dev)
513{
514
515 int rc;
516 int i;
517 unsigned long saveflags=0;
518 unsigned long parm;
519 struct claw_privbk *privptr;
520 DECLARE_WAITQUEUE(wait, current);
521 struct timer_list timer;
522 struct ccwbk *p_buf;
523
524#ifdef FUNCTRACE
525 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
526#endif
527 CLAW_DBF_TEXT(4,trace,"open");
Dave Jones68e3c5e2006-07-10 04:45:18 -0700[diff] [blame]528 if (!dev || (dev->name[0] == 0x00)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]529 CLAW_DBF_TEXT(2,trace,"BadDev");
530 printk(KERN_WARNING "claw: Bad device at open failing \n");
531 return -ENODEV;
532 }
533 privptr = (struct claw_privbk *)dev->priv;
534 /* allocate and initialize CCW blocks */
535 if (privptr->buffs_alloc == 0) {
536 rc=init_ccw_bk(dev);
537 if (rc) {
538 printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
539 dev->name,
540 __FUNCTION__, __LINE__);
541 CLAW_DBF_TEXT(2,trace,"openmem");
542 return -ENOMEM;
543 }
544 }
545 privptr->system_validate_comp=0;
546 privptr->release_pend=0;
547 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
548 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
549 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
550 privptr->p_env->packing=PACKING_ASK;
551 } else {
552 privptr->p_env->packing=0;
553 privptr->p_env->read_size=CLAW_FRAME_SIZE;
554 privptr->p_env->write_size=CLAW_FRAME_SIZE;
555 }
556 claw_set_busy(dev);
557 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
558 (unsigned long) &privptr->channel[READ]);
559 for ( i = 0; i < 2; i++) {
560 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
561 init_waitqueue_head(&privptr->channel[i].wait);
562 /* skb_queue_head_init(&p_ch->io_queue); */
563 if (i == WRITE)
564 skb_queue_head_init(
565 &privptr->channel[WRITE].collect_queue);
566 privptr->channel[i].flag_a = 0;
567 privptr->channel[i].IO_active = 0;
568 privptr->channel[i].flag &= ~CLAW_TIMER;
569 init_timer(&timer);
570 timer.function = (void *)claw_timer;
571 timer.data = (unsigned long)(&privptr->channel[i]);
572 timer.expires = jiffies + 15*HZ;
573 add_timer(&timer);
574 spin_lock_irqsave(get_ccwdev_lock(
575 privptr->channel[i].cdev), saveflags);
576 parm = (unsigned long) &privptr->channel[i];
577 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
578 rc = 0;
579 add_wait_queue(&privptr->channel[i].wait, &wait);
580 rc = ccw_device_halt(
581 (struct ccw_device *)privptr->channel[i].cdev,parm);
582 set_current_state(TASK_INTERRUPTIBLE);
583 spin_unlock_irqrestore(
584 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
585 schedule();
586 set_current_state(TASK_RUNNING);
587 remove_wait_queue(&privptr->channel[i].wait, &wait);
588 if(rc != 0)
589 ccw_check_return_code(privptr->channel[i].cdev, rc);
590 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
591 del_timer(&timer);
592 }
593 if ((((privptr->channel[READ].last_dstat |
594 privptr->channel[WRITE].last_dstat) &
595 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
596 (((privptr->channel[READ].flag |
597 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
598#ifdef DEBUGMSG
599 printk(KERN_INFO "%s: channel problems during open - read:"
600 " %02x - write: %02x\n",
601 dev->name,
602 privptr->channel[READ].last_dstat,
603 privptr->channel[WRITE].last_dstat);
604#endif
605 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
606 CLAW_DBF_TEXT(2,trace,"notrdy");
607
608 for ( i = 0; i < 2; i++) {
609 spin_lock_irqsave(
610 get_ccwdev_lock(privptr->channel[i].cdev),
611 saveflags);
612 parm = (unsigned long) &privptr->channel[i];
613 privptr->channel[i].claw_state = CLAW_STOP;
614 rc = ccw_device_halt(
615 (struct ccw_device *)&privptr->channel[i].cdev,
616 parm);
617 spin_unlock_irqrestore(
618 get_ccwdev_lock(privptr->channel[i].cdev),
619 saveflags);
620 if (rc != 0) {
621 ccw_check_return_code(
622 privptr->channel[i].cdev, rc);
623 }
624 }
625 free_pages((unsigned long)privptr->p_buff_ccw,
626 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
627 if (privptr->p_env->read_size < PAGE_SIZE) {
628 free_pages((unsigned long)privptr->p_buff_read,
629 (int)pages_to_order_of_mag(
630 privptr->p_buff_read_num));
631 }
632 else {
633 p_buf=privptr->p_read_active_first;
634 while (p_buf!=NULL) {
635 free_pages((unsigned long)p_buf->p_buffer,
636 (int)pages_to_order_of_mag(
637 privptr->p_buff_pages_perread ));
638 p_buf=p_buf->next;
639 }
640 }
641 if (privptr->p_env->write_size < PAGE_SIZE ) {
642 free_pages((unsigned long)privptr->p_buff_write,
643 (int)pages_to_order_of_mag(
644 privptr->p_buff_write_num));
645 }
646 else {
647 p_buf=privptr->p_write_active_first;
648 while (p_buf!=NULL) {
649 free_pages((unsigned long)p_buf->p_buffer,
650 (int)pages_to_order_of_mag(
651 privptr->p_buff_pages_perwrite ));
652 p_buf=p_buf->next;
653 }
654 }
655 privptr->buffs_alloc = 0;
656 privptr->channel[READ].flag= 0x00;
657 privptr->channel[WRITE].flag = 0x00;
658 privptr->p_buff_ccw=NULL;
659 privptr->p_buff_read=NULL;
660 privptr->p_buff_write=NULL;
661 claw_clear_busy(dev);
662#ifdef FUNCTRACE
663 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
664 dev->name,__FUNCTION__,__LINE__);
665#endif
666 CLAW_DBF_TEXT(2,trace,"open EIO");
667 return -EIO;
668 }
669
670 /* Send SystemValidate command */
671
672 claw_clear_busy(dev);
673
674#ifdef FUNCTRACE
675 printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
676 dev->name,__FUNCTION__,__LINE__);
677#endif
678 CLAW_DBF_TEXT(4,trace,"openok");
679 return 0;
680} /* end of claw_open */
681
682/*-------------------------------------------------------------------*
683* *
684* claw_irq_handler *
685* *
686*--------------------------------------------------------------------*/
687static void
688claw_irq_handler(struct ccw_device *cdev,
689 unsigned long intparm, struct irb *irb)
690{
691 struct chbk *p_ch = NULL;
692 struct claw_privbk *privptr = NULL;
693 struct net_device *dev = NULL;
694 struct claw_env *p_env;
695 struct chbk *p_ch_r=NULL;
696
697
698#ifdef FUNCTRACE
699 printk(KERN_INFO "%s enter \n",__FUNCTION__);
700#endif
701 CLAW_DBF_TEXT(4,trace,"clawirq");
702 /* Bypass all 'unsolicited interrupts' */
703 if (!cdev->dev.driver_data) {
704 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
705 "%s received c-%02x d-%02x\n",
706 cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
707#ifdef FUNCTRACE
708 printk(KERN_INFO "claw: %s() "
709 "exit on line %d\n",__FUNCTION__,__LINE__);
710#endif
711 CLAW_DBF_TEXT(2,trace,"badirq");
712 return;
713 }
714 privptr = (struct claw_privbk *)cdev->dev.driver_data;
715
716 /* Try to extract channel from driver data. */
717 if (privptr->channel[READ].cdev == cdev)
718 p_ch = &privptr->channel[READ];
719 else if (privptr->channel[WRITE].cdev == cdev)
720 p_ch = &privptr->channel[WRITE];
721 else {
722 printk(KERN_WARNING "claw: Can't determine channel for "
723 "interrupt, device %s\n", cdev->dev.bus_id);
724 CLAW_DBF_TEXT(2,trace,"badchan");
725 return;
726 }
727 CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
728
729 dev = (struct net_device *) (p_ch->ndev);
730 p_env=privptr->p_env;
731
732#ifdef IOTRACE
733 printk(KERN_INFO "%s: interrupt for device: %04x "
734 "received c-%02x d-%02x state-%02x\n",
735 dev->name, p_ch->devno, irb->scsw.cstat,
736 irb->scsw.dstat, p_ch->claw_state);
737#endif
738
739 /* Copy interruption response block. */
740 memcpy(p_ch->irb, irb, sizeof(struct irb));
741
742 /* Check for good subchannel return code, otherwise error message */
743 if (irb->scsw.cstat && !(irb->scsw.cstat & SCHN_STAT_PCI)) {
744 printk(KERN_INFO "%s: subchannel check for device: %04x -"
745 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
746 dev->name, p_ch->devno,
747 irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
748#ifdef IOTRACE
749 dumpit((char *)irb,sizeof(struct irb));
750 dumpit((char *)(unsigned long)irb->scsw.cpa,
751 sizeof(struct ccw1));
752#endif
753#ifdef FUNCTRACE
754 printk(KERN_INFO "%s:%s Exit on line %d\n",
755 dev->name,__FUNCTION__,__LINE__);
756#endif
757 CLAW_DBF_TEXT(2,trace,"chanchk");
758 /* return; */
759 }
760
761 /* Check the reason-code of a unit check */
762 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
763 ccw_check_unit_check(p_ch, irb->ecw[0]);
764 }
765
766 /* State machine to bring the connection up, down and to restart */
767 p_ch->last_dstat = irb->scsw.dstat;
768
769 switch (p_ch->claw_state) {
770 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
771#ifdef DEBUGMSG
772 printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
773#endif
774 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
775 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
776 (p_ch->irb->scsw.stctl ==
777 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
778#ifdef FUNCTRACE
779 printk(KERN_INFO "%s:%s Exit on line %d\n",
780 dev->name,__FUNCTION__,__LINE__);
781#endif
782 return;
783 }
784 wake_up(&p_ch->wait); /* wake up claw_release */
785
786#ifdef DEBUGMSG
787 printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
788#endif
789#ifdef FUNCTRACE
790 printk(KERN_INFO "%s:%s Exit on line %d\n",
791 dev->name,__FUNCTION__,__LINE__);
792#endif
793 CLAW_DBF_TEXT(4,trace,"stop");
794 return;
795
796 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
797#ifdef DEBUGMSG
798 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
799 dev->name);
800#endif
801 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
802 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
803 (p_ch->irb->scsw.stctl ==
804 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
805#ifdef FUNCTRACE
806 printk(KERN_INFO "%s:%s Exit on line %d\n",
807 dev->name,__FUNCTION__,__LINE__);
808#endif
809 CLAW_DBF_TEXT(4,trace,"haltio");
810 return;
811 }
812 if (p_ch->flag == CLAW_READ) {
813 p_ch->claw_state = CLAW_START_READ;
814 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
815 }
816 else
817 if (p_ch->flag == CLAW_WRITE) {
818 p_ch->claw_state = CLAW_START_WRITE;
819 /* send SYSTEM_VALIDATE */
820 claw_strt_read(dev, LOCK_NO);
821 claw_send_control(dev,
822 SYSTEM_VALIDATE_REQUEST,
823 0, 0, 0,
824 p_env->host_name,
825 p_env->adapter_name );
826 } else {
827 printk(KERN_WARNING "claw: unsolicited "
828 "interrupt for device:"
829 "%s received c-%02x d-%02x\n",
830 cdev->dev.bus_id,
831 irb->scsw.cstat,
832 irb->scsw.dstat);
833 return;
834 }
835#ifdef DEBUGMSG
836 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
837 dev->name);
838#endif
839#ifdef FUNCTRACE
840 printk(KERN_INFO "%s:%s Exit on line %d\n",
841 dev->name,__FUNCTION__,__LINE__);
842#endif
843 CLAW_DBF_TEXT(4,trace,"haltio");
844 return;
845 case CLAW_START_READ:
846 CLAW_DBF_TEXT(4,trace,"ReadIRQ");
847 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
848 clear_bit(0, (void *)&p_ch->IO_active);
849 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
850 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
851 (p_ch->irb->ecw[0]) == 0)
852 {
853 privptr->stats.rx_errors++;
854 printk(KERN_INFO "%s: Restart is "
855 "required after remote "
856 "side recovers \n",
857 dev->name);
858 }
859#ifdef FUNCTRACE
860 printk(KERN_INFO "%s:%s Exit on line %d\n",
861 dev->name,__FUNCTION__,__LINE__);
862#endif
863 CLAW_DBF_TEXT(4,trace,"notrdy");
864 return;
865 }
866 if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
867 (p_ch->irb->scsw.dstat==0)) {
868 if (test_and_set_bit(CLAW_BH_ACTIVE,
869 (void *)&p_ch->flag_a) == 0) {
870 tasklet_schedule(&p_ch->tasklet);
871 }
872 else {
873 CLAW_DBF_TEXT(4,trace,"PCINoBH");
874 }
875#ifdef FUNCTRACE
876 printk(KERN_INFO "%s:%s Exit on line %d\n",
877 dev->name,__FUNCTION__,__LINE__);
878#endif
879 CLAW_DBF_TEXT(4,trace,"PCI_read");
880 return;
881 }
882 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
883 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
884 (p_ch->irb->scsw.stctl ==
885 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
886#ifdef FUNCTRACE
887 printk(KERN_INFO "%s:%s Exit on line %d\n",
888 dev->name,__FUNCTION__,__LINE__);
889#endif
890 CLAW_DBF_TEXT(4,trace,"SPend_rd");
891 return;
892 }
893 clear_bit(0, (void *)&p_ch->IO_active);
894 claw_clearbit_busy(TB_RETRY,dev);
895 if (test_and_set_bit(CLAW_BH_ACTIVE,
896 (void *)&p_ch->flag_a) == 0) {
897 tasklet_schedule(&p_ch->tasklet);
898 }
899 else {
900 CLAW_DBF_TEXT(4,trace,"RdBHAct");
901 }
902
903#ifdef DEBUGMSG
904 printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
905 dev->name);
906#endif
907#ifdef FUNCTRACE
908 printk(KERN_INFO "%s:%s Exit on line %d\n",
909 dev->name,__FUNCTION__,__LINE__);
910#endif
911 CLAW_DBF_TEXT(4,trace,"RdIRQXit");
912 return;
913 case CLAW_START_WRITE:
914 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
915 printk(KERN_INFO "%s: Unit Check Occured in "
916 "write channel\n",dev->name);
917 clear_bit(0, (void *)&p_ch->IO_active);
918 if (p_ch->irb->ecw[0] & 0x80 ) {
919 printk(KERN_INFO "%s: Resetting Event "
920 "occurred:\n",dev->name);
921 init_timer(&p_ch->timer);
922 p_ch->timer.function =
923 (void *)claw_write_retry;
924 p_ch->timer.data = (unsigned long)p_ch;
925 p_ch->timer.expires = jiffies + 10*HZ;
926 add_timer(&p_ch->timer);
927 printk(KERN_INFO "%s: write connection "
928 "restarting\n",dev->name);
929 }
930#ifdef FUNCTRACE
931 printk(KERN_INFO "%s:%s Exit on line %d\n",
932 dev->name,__FUNCTION__,__LINE__);
933#endif
934 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
935 return;
936 }
937 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
938 clear_bit(0, (void *)&p_ch->IO_active);
939 printk(KERN_INFO "%s: Unit Exception "
940 "Occured in write channel\n",
941 dev->name);
942 }
943 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
944 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
945 (p_ch->irb->scsw.stctl ==
946 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
947#ifdef FUNCTRACE
948 printk(KERN_INFO "%s:%s Exit on line %d\n",
949 dev->name,__FUNCTION__,__LINE__);
950#endif
951 CLAW_DBF_TEXT(4,trace,"writeUE");
952 return;
953 }
954 clear_bit(0, (void *)&p_ch->IO_active);
955 if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
956 claw_write_next(p_ch);
957 claw_clearbit_busy(TB_TX,dev);
958 claw_clear_busy(dev);
959 }
960 p_ch_r=(struct chbk *)&privptr->channel[READ];
961 if (test_and_set_bit(CLAW_BH_ACTIVE,
962 (void *)&p_ch_r->flag_a) == 0) {
963 tasklet_schedule(&p_ch_r->tasklet);
964 }
965
966#ifdef DEBUGMSG
967 printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
968 dev->name);
969#endif
970#ifdef FUNCTRACE
971 printk(KERN_INFO "%s:%s Exit on line %d\n",
972 dev->name,__FUNCTION__,__LINE__);
973#endif
974 CLAW_DBF_TEXT(4,trace,"StWtExit");
975 return;
976 default:
977 printk(KERN_WARNING "%s: wrong selection code - irq "
978 "state=%d\n",dev->name,p_ch->claw_state);
979#ifdef FUNCTRACE
980 printk(KERN_INFO "%s:%s Exit on line %d\n",
981 dev->name,__FUNCTION__,__LINE__);
982#endif
983 CLAW_DBF_TEXT(2,trace,"badIRQ");
984 return;
985 }
986
987} /* end of claw_irq_handler */
988
989
990/*-------------------------------------------------------------------*
991* claw_irq_tasklet *
992* *
993*--------------------------------------------------------------------*/
994static void
995claw_irq_tasklet ( unsigned long data )
996{
997 struct chbk * p_ch;
998 struct net_device *dev;
999 struct claw_privbk * privptr;
1000
1001 p_ch = (struct chbk *) data;
1002 dev = (struct net_device *)p_ch->ndev;
1003#ifdef FUNCTRACE
1004 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1005#endif
1006#ifdef DEBUGMSG
1007 printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1008 dumpit((char *) p_ch, sizeof(struct chbk));
1009#endif
1010 CLAW_DBF_TEXT(4,trace,"IRQtask");
1011
1012 privptr = (struct claw_privbk *) dev->priv;
1013
1014#ifdef DEBUGMSG
1015 printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1016 dev->name, p_ch->claw_state);
1017#endif
1018
1019 unpack_read(dev);
1020 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1021 CLAW_DBF_TEXT(4,trace,"TskletXt");
1022#ifdef FUNCTRACE
1023 printk(KERN_INFO "%s:%s Exit on line %d\n",
1024 dev->name,__FUNCTION__,__LINE__);
1025#endif
1026 return;
1027} /* end of claw_irq_bh */
1028
1029/*-------------------------------------------------------------------*
1030* claw_release *
1031* *
1032*--------------------------------------------------------------------*/
1033static int
1034claw_release(struct net_device *dev)
1035{
1036 int rc;
1037 int i;
1038 unsigned long saveflags;
1039 unsigned long parm;
1040 struct claw_privbk *privptr;
1041 DECLARE_WAITQUEUE(wait, current);
1042 struct ccwbk* p_this_ccw;
1043 struct ccwbk* p_buf;
1044
1045 if (!dev)
1046 return 0;
1047 privptr = (struct claw_privbk *) dev->priv;
1048 if (!privptr)
1049 return 0;
1050#ifdef FUNCTRACE
1051 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1052#endif
1053 CLAW_DBF_TEXT(4,trace,"release");
1054#ifdef DEBUGMSG
1055 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1056 dumpit((char *) dev, sizeof(struct net_device));
1057 printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1058 printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1059#endif
1060 privptr->release_pend=1;
1061 claw_setbit_busy(TB_STOP,dev);
1062 for ( i = 1; i >=0 ; i--) {
1063 spin_lock_irqsave(
1064 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1065 /* del_timer(&privptr->channel[READ].timer); */
1066 privptr->channel[i].claw_state = CLAW_STOP;
1067 privptr->channel[i].IO_active = 0;
1068 parm = (unsigned long) &privptr->channel[i];
1069 if (i == WRITE)
1070 claw_purge_skb_queue(
1071 &privptr->channel[WRITE].collect_queue);
1072 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1073 if (privptr->system_validate_comp==0x00) /* never opened? */
1074 init_waitqueue_head(&privptr->channel[i].wait);
1075 add_wait_queue(&privptr->channel[i].wait, &wait);
1076 set_current_state(TASK_INTERRUPTIBLE);
1077 spin_unlock_irqrestore(
1078 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1079 schedule();
1080 set_current_state(TASK_RUNNING);
1081 remove_wait_queue(&privptr->channel[i].wait, &wait);
1082 if (rc != 0) {
1083 ccw_check_return_code(privptr->channel[i].cdev, rc);
1084 }
1085 }
1086 if (privptr->pk_skb != NULL) {
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]1087 dev_kfree_skb_any(privptr->pk_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1088 privptr->pk_skb = NULL;
1089 }
1090 if(privptr->buffs_alloc != 1) {
1091#ifdef FUNCTRACE
1092 printk(KERN_INFO "%s:%s Exit on line %d\n",
1093 dev->name,__FUNCTION__,__LINE__);
1094#endif
1095 CLAW_DBF_TEXT(4,trace,"none2fre");
1096 return 0;
1097 }
1098 CLAW_DBF_TEXT(4,trace,"freebufs");
1099 if (privptr->p_buff_ccw != NULL) {
1100 free_pages((unsigned long)privptr->p_buff_ccw,
1101 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1102 }
1103 CLAW_DBF_TEXT(4,trace,"freeread");
1104 if (privptr->p_env->read_size < PAGE_SIZE) {
1105 if (privptr->p_buff_read != NULL) {
1106 free_pages((unsigned long)privptr->p_buff_read,
1107 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1108 }
1109 }
1110 else {
1111 p_buf=privptr->p_read_active_first;
1112 while (p_buf!=NULL) {
1113 free_pages((unsigned long)p_buf->p_buffer,
1114 (int)pages_to_order_of_mag(
1115 privptr->p_buff_pages_perread ));
1116 p_buf=p_buf->next;
1117 }
1118 }
1119 CLAW_DBF_TEXT(4,trace,"freewrit");
1120 if (privptr->p_env->write_size < PAGE_SIZE ) {
1121 free_pages((unsigned long)privptr->p_buff_write,
1122 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1123 }
1124 else {
1125 p_buf=privptr->p_write_active_first;
1126 while (p_buf!=NULL) {
1127 free_pages((unsigned long)p_buf->p_buffer,
1128 (int)pages_to_order_of_mag(
1129 privptr->p_buff_pages_perwrite ));
1130 p_buf=p_buf->next;
1131 }
1132 }
1133 CLAW_DBF_TEXT(4,trace,"clearptr");
1134 privptr->buffs_alloc = 0;
1135 privptr->p_buff_ccw=NULL;
1136 privptr->p_buff_read=NULL;
1137 privptr->p_buff_write=NULL;
1138 privptr->system_validate_comp=0;
1139 privptr->release_pend=0;
1140 /* Remove any writes that were pending and reset all reads */
1141 p_this_ccw=privptr->p_read_active_first;
1142 while (p_this_ccw!=NULL) {
1143 p_this_ccw->header.length=0xffff;
1144 p_this_ccw->header.opcode=0xff;
1145 p_this_ccw->header.flag=0x00;
1146 p_this_ccw=p_this_ccw->next;
1147 }
1148
1149 while (privptr->p_write_active_first!=NULL) {
1150 p_this_ccw=privptr->p_write_active_first;
1151 p_this_ccw->header.flag=CLAW_PENDING;
1152 privptr->p_write_active_first=p_this_ccw->next;
1153 p_this_ccw->next=privptr->p_write_free_chain;
1154 privptr->p_write_free_chain=p_this_ccw;
1155 ++privptr->write_free_count;
1156 }
1157 privptr->p_write_active_last=NULL;
1158 privptr->mtc_logical_link = -1;
1159 privptr->mtc_skipping = 1;
1160 privptr->mtc_offset=0;
1161
1162 if (((privptr->channel[READ].last_dstat |
1163 privptr->channel[WRITE].last_dstat) &
1164 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1165 printk(KERN_WARNING "%s: channel problems during close - "
1166 "read: %02x - write: %02x\n",
1167 dev->name,
1168 privptr->channel[READ].last_dstat,
1169 privptr->channel[WRITE].last_dstat);
1170 CLAW_DBF_TEXT(2,trace,"badclose");
1171 }
1172#ifdef FUNCTRACE
1173 printk(KERN_INFO "%s:%s Exit on line %d\n",
1174 dev->name,__FUNCTION__,__LINE__);
1175#endif
1176 CLAW_DBF_TEXT(4,trace,"rlsexit");
1177 return 0;
1178} /* end of claw_release */
1179
1180
1181
1182/*-------------------------------------------------------------------*
1183* claw_write_retry *
1184* *
1185*--------------------------------------------------------------------*/
1186
1187static void
1188claw_write_retry ( struct chbk *p_ch )
1189{
1190
1191 struct net_device *dev=p_ch->ndev;
1192
1193
1194#ifdef FUNCTRACE
1195 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1196 printk(KERN_INFO "claw: variable p_ch =\n");
1197 dumpit((char *) p_ch, sizeof(struct chbk));
1198#endif
1199 CLAW_DBF_TEXT(4,trace,"w_retry");
1200 if (p_ch->claw_state == CLAW_STOP) {
1201#ifdef FUNCTRACE
1202 printk(KERN_INFO "%s:%s Exit on line %d\n",
1203 dev->name,__FUNCTION__,__LINE__);
1204#endif
1205 return;
1206 }
1207#ifdef DEBUGMSG
1208 printk( KERN_INFO "%s:%s state-%02x\n" ,
1209 dev->name,
1210 __FUNCTION__,
1211 p_ch->claw_state);
1212#endif
1213 claw_strt_out_IO( dev );
1214#ifdef FUNCTRACE
1215 printk(KERN_INFO "%s:%s Exit on line %d\n",
1216 dev->name,__FUNCTION__,__LINE__);
1217#endif
1218 CLAW_DBF_TEXT(4,trace,"rtry_xit");
1219 return;
1220} /* end of claw_write_retry */
1221
1222
1223/*-------------------------------------------------------------------*
1224* claw_write_next *
1225* *
1226*--------------------------------------------------------------------*/
1227
1228static void
1229claw_write_next ( struct chbk * p_ch )
1230{
1231
1232 struct net_device *dev;
1233 struct claw_privbk *privptr=NULL;
1234 struct sk_buff *pk_skb;
1235 int rc;
1236
1237#ifdef FUNCTRACE
1238 printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__FUNCTION__);
1239 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1240 dumpit((char *) p_ch, sizeof(struct chbk));
1241#endif
1242 CLAW_DBF_TEXT(4,trace,"claw_wrt");
1243 if (p_ch->claw_state == CLAW_STOP)
1244 return;
1245 dev = (struct net_device *) p_ch->ndev;
1246 privptr = (struct claw_privbk *) dev->priv;
1247 claw_free_wrt_buf( dev );
1248 if ((privptr->write_free_count > 0) &&
David S. Millerb03efcf2005-07-08 14:57:23 -0700[diff] [blame]1249 !skb_queue_empty(&p_ch->collect_queue)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1250 pk_skb = claw_pack_skb(privptr);
1251 while (pk_skb != NULL) {
1252 rc = claw_hw_tx( pk_skb, dev,1);
1253 if (privptr->write_free_count > 0) {
1254 pk_skb = claw_pack_skb(privptr);
1255 } else
1256 pk_skb = NULL;
1257 }
1258 }
1259 if (privptr->p_write_active_first!=NULL) {
1260 claw_strt_out_IO(dev);
1261 }
1262
1263#ifdef FUNCTRACE
1264 printk(KERN_INFO "%s:%s Exit on line %d\n",
1265 dev->name,__FUNCTION__,__LINE__);
1266#endif
1267 return;
1268} /* end of claw_write_next */
1269
1270/*-------------------------------------------------------------------*
1271* *
1272* claw_timer *
1273*--------------------------------------------------------------------*/
1274
1275static void
1276claw_timer ( struct chbk * p_ch )
1277{
1278#ifdef FUNCTRACE
1279 printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1280 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1281 dumpit((char *) p_ch, sizeof(struct chbk));
1282#endif
1283 CLAW_DBF_TEXT(4,trace,"timer");
1284 p_ch->flag |= CLAW_TIMER;
1285 wake_up(&p_ch->wait);
1286#ifdef FUNCTRACE
1287 printk(KERN_INFO "%s:%s Exit on line %d\n",
1288 p_ch->ndev->name,__FUNCTION__,__LINE__);
1289#endif
1290 return;
1291} /* end of claw_timer */
1292
1293
1294/*
1295*
1296* functions
1297*/
1298
1299
1300/*-------------------------------------------------------------------*
1301* *
1302* pages_to_order_of_mag *
1303* *
1304* takes a number of pages from 1 to 512 and returns the *
1305* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1306* of magnitude get_free_pages() has an upper order of 9 *
1307*--------------------------------------------------------------------*/
1308
Heiko Carstens4d284ca2007-02-05 21:18:53 +0100[diff] [blame]1309static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1310pages_to_order_of_mag(int num_of_pages)
1311{
1312 int order_of_mag=1; /* assume 2 pages */
1313 int nump=2;
1314#ifdef FUNCTRACE
1315 printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1316#endif
1317 CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1318 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1319 /* 512 pages = 2Meg on 4k page systems */
1320 if (num_of_pages >= 512) {return 9; }
1321 /* we have two or more pages order is at least 1 */
1322 for (nump=2 ;nump <= 512;nump*=2) {
1323 if (num_of_pages <= nump)
1324 break;
1325 order_of_mag +=1;
1326 }
1327 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1328#ifdef FUNCTRACE
1329 printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1330 __FUNCTION__,__LINE__, order_of_mag);
1331#endif
1332 CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1333 return order_of_mag;
1334}
1335
1336/*-------------------------------------------------------------------*
1337* *
1338* add_claw_reads *
1339* *
1340*--------------------------------------------------------------------*/
1341static int
1342add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1343 struct ccwbk* p_last)
1344{
1345 struct claw_privbk *privptr;
1346 struct ccw1 temp_ccw;
1347 struct endccw * p_end;
1348#ifdef IOTRACE
1349 struct ccwbk* p_buf;
1350#endif
1351#ifdef FUNCTRACE
1352 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1353#endif
1354#ifdef DEBUGMSG
1355 printk(KERN_INFO "dev\n");
1356 dumpit((char *) dev, sizeof(struct net_device));
1357 printk(KERN_INFO "p_first\n");
1358 dumpit((char *) p_first, sizeof(struct ccwbk));
1359 printk(KERN_INFO "p_last\n");
1360 dumpit((char *) p_last, sizeof(struct ccwbk));
1361#endif
1362 CLAW_DBF_TEXT(4,trace,"addreads");
1363 privptr = dev->priv;
1364 p_end = privptr->p_end_ccw;
1365
1366 /* first CCW and last CCW contains a new set of read channel programs
1367 * to apend the running channel programs
1368 */
1369 if ( p_first==NULL) {
1370#ifdef FUNCTRACE
1371 printk(KERN_INFO "%s:%s Exit on line %d\n",
1372 dev->name,__FUNCTION__,__LINE__);
1373#endif
1374 CLAW_DBF_TEXT(4,trace,"addexit");
1375 return 0;
1376 }
1377
1378 /* set up ending CCW sequence for this segment */
1379 if (p_end->read1) {
1380 p_end->read1=0x00; /* second ending CCW is now active */
1381 /* reset ending CCWs and setup TIC CCWs */
1382 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1383 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1384 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1385 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1386 p_end->read2_nop2.cda=0;
1387 p_end->read2_nop2.count=1;
1388 }
1389 else {
1390 p_end->read1=0x01; /* first ending CCW is now active */
1391 /* reset ending CCWs and setup TIC CCWs */
1392 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1393 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1394 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1395 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1396 p_end->read1_nop2.cda=0;
1397 p_end->read1_nop2.count=1;
1398 }
1399
1400 if ( privptr-> p_read_active_first ==NULL ) {
1401#ifdef DEBUGMSG
Uwe Zeisberger80682fa2006-03-22 00:21:33 +0100[diff] [blame]1402 printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1403 dev->name,__FUNCTION__);
1404 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1405 dev->name,__FUNCTION__);
1406#endif
1407 privptr-> p_read_active_first= p_first; /* set new first */
1408 privptr-> p_read_active_last = p_last; /* set new last */
1409 }
1410 else {
1411
1412#ifdef DEBUGMSG
1413 printk(KERN_INFO "%s:%s Read in progress \n",
1414 dev->name,__FUNCTION__);
1415#endif
1416 /* set up TIC ccw */
1417 temp_ccw.cda= (__u32)__pa(&p_first->read);
1418 temp_ccw.count=0;
1419 temp_ccw.flags=0;
1420 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1421
1422
1423 if (p_end->read1) {
1424
1425 /* first set of CCW's is chained to the new read */
1426 /* chain, so the second set is chained to the active chain. */
1427 /* Therefore modify the second set to point to the new */
1428 /* read chain set up TIC CCWs */
1429 /* make sure we update the CCW so channel doesn't fetch it */
1430 /* when it's only half done */
1431 memcpy( &p_end->read2_nop2, &temp_ccw ,
1432 sizeof(struct ccw1));
1433 privptr->p_read_active_last->r_TIC_1.cda=
1434 (__u32)__pa(&p_first->read);
1435 privptr->p_read_active_last->r_TIC_2.cda=
1436 (__u32)__pa(&p_first->read);
1437 }
1438 else {
1439 /* make sure we update the CCW so channel doesn't */
1440 /* fetch it when it is only half done */
1441 memcpy( &p_end->read1_nop2, &temp_ccw ,
1442 sizeof(struct ccw1));
1443 privptr->p_read_active_last->r_TIC_1.cda=
1444 (__u32)__pa(&p_first->read);
1445 privptr->p_read_active_last->r_TIC_2.cda=
1446 (__u32)__pa(&p_first->read);
1447 }
1448 /* chain in new set of blocks */
1449 privptr->p_read_active_last->next = p_first;
1450 privptr->p_read_active_last=p_last;
1451 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1452#ifdef IOTRACE
1453 printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__FUNCTION__);
1454 dumpit((char *)p_last, sizeof(struct ccwbk));
1455 printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
1456 dumpit((char *)p_end, sizeof(struct endccw));
1457
1458 printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1459 dumpit((char *)p_first, sizeof(struct ccwbk));
1460 printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1461 dev->name,__FUNCTION__);
1462 p_buf=privptr->p_read_active_first;
1463 while (p_buf!=NULL) {
1464 dumpit((char *)p_buf, sizeof(struct ccwbk));
1465 p_buf=p_buf->next;
1466 }
1467#endif
1468#ifdef FUNCTRACE
1469 printk(KERN_INFO "%s:%s Exit on line %d\n",
1470 dev->name,__FUNCTION__,__LINE__);
1471#endif
1472 CLAW_DBF_TEXT(4,trace,"addexit");
1473 return 0;
1474} /* end of add_claw_reads */
1475
1476/*-------------------------------------------------------------------*
1477 * ccw_check_return_code *
1478 * *
1479 *-------------------------------------------------------------------*/
1480
Heiko Carstens4d284ca2007-02-05 21:18:53 +0100[diff] [blame]1481static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1482ccw_check_return_code(struct ccw_device *cdev, int return_code)
1483{
1484#ifdef FUNCTRACE
1485 printk(KERN_INFO "%s: %s() > enter \n",
1486 cdev->dev.bus_id,__FUNCTION__);
1487#endif
1488 CLAW_DBF_TEXT(4,trace,"ccwret");
1489#ifdef DEBUGMSG
1490 printk(KERN_INFO "variable cdev =\n");
1491 dumpit((char *) cdev, sizeof(struct ccw_device));
1492 printk(KERN_INFO "variable return_code = %d\n",return_code);
1493#endif
1494 if (return_code != 0) {
1495 switch (return_code) {
1496 case -EBUSY:
1497 printk(KERN_INFO "%s: Busy !\n",
1498 cdev->dev.bus_id);
1499 break;
1500 case -ENODEV:
1501 printk(KERN_EMERG "%s: Missing device called "
1502 "for IO ENODEV\n", cdev->dev.bus_id);
1503 break;
1504 case -EIO:
1505 printk(KERN_EMERG "%s: Status pending... EIO \n",
1506 cdev->dev.bus_id);
1507 break;
1508 case -EINVAL:
1509 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1510 cdev->dev.bus_id);
1511 break;
1512 default:
1513 printk(KERN_EMERG "%s: Unknown error in "
1514 "Do_IO %d\n",cdev->dev.bus_id, return_code);
1515 }
1516 }
1517#ifdef FUNCTRACE
1518 printk(KERN_INFO "%s: %s() > exit on line %d\n",
1519 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1520#endif
1521 CLAW_DBF_TEXT(4,trace,"ccwret");
1522} /* end of ccw_check_return_code */
1523
1524/*-------------------------------------------------------------------*
1525* ccw_check_unit_check *
1526*--------------------------------------------------------------------*/
1527
Heiko Carstens4d284ca2007-02-05 21:18:53 +0100[diff] [blame]1528static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1529ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1530{
1531 struct net_device *dev = p_ch->ndev;
1532
1533#ifdef FUNCTRACE
1534 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1535#endif
1536#ifdef DEBUGMSG
1537 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1538 dumpit((char *)dev, sizeof(struct net_device));
1539 printk(KERN_INFO "%s: variable sense =\n",dev->name);
1540 dumpit((char *)&sense, 2);
1541#endif
1542 CLAW_DBF_TEXT(4,trace,"unitchek");
1543
1544 printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1545 dev->name, sense);
1546
1547 if (sense & 0x40) {
1548 if (sense & 0x01) {
1549 printk(KERN_WARNING "%s: Interface disconnect or "
1550 "Selective reset "
1551 "occurred (remote side)\n", dev->name);
1552 }
1553 else {
1554 printk(KERN_WARNING "%s: System reset occured"
1555 " (remote side)\n", dev->name);
1556 }
1557 }
1558 else if (sense & 0x20) {
1559 if (sense & 0x04) {
1560 printk(KERN_WARNING "%s: Data-streaming "
1561 "timeout)\n", dev->name);
1562 }
1563 else {
1564 printk(KERN_WARNING "%s: Data-transfer parity"
1565 " error\n", dev->name);
1566 }
1567 }
1568 else if (sense & 0x10) {
1569 if (sense & 0x20) {
1570 printk(KERN_WARNING "%s: Hardware malfunction "
1571 "(remote side)\n", dev->name);
1572 }
1573 else {
1574 printk(KERN_WARNING "%s: read-data parity error "
1575 "(remote side)\n", dev->name);
1576 }
1577 }
1578
1579#ifdef FUNCTRACE
1580 printk(KERN_INFO "%s: %s() exit on line %d\n",
1581 dev->name,__FUNCTION__,__LINE__);
1582#endif
1583} /* end of ccw_check_unit_check */
1584
1585
1586
1587/*-------------------------------------------------------------------*
1588* Dump buffer format *
1589* *
1590*--------------------------------------------------------------------*/
1591#ifdef DEBUG
1592static void
1593dumpit(char* buf, int len)
1594{
1595
1596 __u32 ct, sw, rm, dup;
1597 char *ptr, *rptr;
1598 char tbuf[82], tdup[82];
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800[diff] [blame]1599#if (CONFIG_64BIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1600 char addr[22];
1601#else
1602 char addr[12];
1603#endif
1604 char boff[12];
1605 char bhex[82], duphex[82];
1606 char basc[40];
1607
1608 sw = 0;
1609 rptr =ptr=buf;
1610 rm = 16;
1611 duphex[0] = 0x00;
1612 dup = 0;
1613 for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
1614 if (sw == 0) {
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800[diff] [blame]1615#if (CONFIG_64BIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1616 sprintf(addr, "%16.16lX",(unsigned long)rptr);
1617#else
1618 sprintf(addr, "%8.8X",(__u32)rptr);
1619#endif
1620 sprintf(boff, "%4.4X", (__u32)ct);
1621 bhex[0] = '\0';
1622 basc[0] = '\0';
1623 }
1624 if ((sw == 4) || (sw == 12)) {
1625 strcat(bhex, " ");
1626 }
1627 if (sw == 8) {
1628 strcat(bhex, " ");
1629 }
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800[diff] [blame]1630#if (CONFIG_64BIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1631 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1632#else
1633 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1634#endif
1635 tbuf[2] = '\0';
1636 strcat(bhex, tbuf);
1637 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1638 basc[sw] = *ptr;
1639 }
1640 else {
1641 basc[sw] = '.';
1642 }
1643 basc[sw+1] = '\0';
1644 sw++;
1645 rm--;
1646 if (sw==16) {
1647 if ((strcmp(duphex, bhex)) !=0) {
1648 if (dup !=0) {
1649 sprintf(tdup,"Duplicate as above to"
1650 " %s", addr);
1651 printk( KERN_INFO " "
1652 " --- %s ---\n",tdup);
1653 }
1654 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1655 addr, boff, bhex, basc);
1656 dup = 0;
1657 strcpy(duphex, bhex);
1658 }
1659 else {
1660 dup++;
1661 }
1662 sw = 0;
1663 rm = 16;
1664 }
1665 } /* endfor */
1666
1667 if (sw != 0) {
1668 for ( ; rm > 0; rm--, sw++ ) {
1669 if ((sw==4) || (sw==12)) strcat(bhex, " ");
1670 if (sw==8) strcat(bhex, " ");
1671 strcat(bhex, " ");
1672 strcat(basc, " ");
1673 }
1674 if (dup !=0) {
1675 sprintf(tdup,"Duplicate as above to %s", addr);
1676 printk( KERN_INFO " --- %s ---\n",
1677 tdup);
1678 }
1679 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1680 addr, boff, bhex, basc);
1681 }
1682 else {
1683 if (dup >=1) {
1684 sprintf(tdup,"Duplicate as above to %s", addr);
1685 printk( KERN_INFO " --- %s ---\n",
1686 tdup);
1687 }
1688 if (dup !=0) {
1689 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1690 addr, boff, bhex, basc);
1691 }
1692 }
1693 return;
1694
1695} /* end of dumpit */
1696#endif
1697
1698/*-------------------------------------------------------------------*
1699* find_link *
1700*--------------------------------------------------------------------*/
1701static int
1702find_link(struct net_device *dev, char *host_name, char *ws_name )
1703{
1704 struct claw_privbk *privptr;
1705 struct claw_env *p_env;
1706 int rc=0;
1707
1708#ifdef FUNCTRACE
1709 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
1710#endif
1711 CLAW_DBF_TEXT(2,setup,"findlink");
1712#ifdef DEBUGMSG
1713 printk(KERN_INFO "%s: variable dev = \n",dev->name);
1714 dumpit((char *) dev, sizeof(struct net_device));
1715 printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1716 printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1717#endif
1718 privptr=dev->priv;
1719 p_env=privptr->p_env;
1720 switch (p_env->packing)
1721 {
1722 case PACKING_ASK:
1723 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1724 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1725 rc = EINVAL;
1726 break;
1727 case DO_PACKED:
1728 case PACK_SEND:
1729 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1730 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1731 rc = EINVAL;
1732 break;
1733 default:
1734 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1735 (memcmp(p_env->api_type , ws_name, 8)!=0))
1736 rc = EINVAL;
1737 break;
1738 }
1739
1740#ifdef FUNCTRACE
1741 printk(KERN_INFO "%s:%s Exit on line %d\n",
1742 dev->name,__FUNCTION__,__LINE__);
1743#endif
1744 return 0;
1745} /* end of find_link */
1746
1747/*-------------------------------------------------------------------*
1748 * claw_hw_tx *
1749 * *
1750 * *
1751 *-------------------------------------------------------------------*/
1752
1753static int
1754claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1755{
1756 int rc=0;
1757 struct claw_privbk *privptr;
1758 struct ccwbk *p_this_ccw;
1759 struct ccwbk *p_first_ccw;
1760 struct ccwbk *p_last_ccw;
1761 __u32 numBuffers;
1762 signed long len_of_data;
1763 unsigned long bytesInThisBuffer;
1764 unsigned char *pDataAddress;
1765 struct endccw *pEnd;
1766 struct ccw1 tempCCW;
1767 struct chbk *p_ch;
1768 struct claw_env *p_env;
1769 int lock;
1770 struct clawph *pk_head;
1771 struct chbk *ch;
1772#ifdef IOTRACE
1773 struct ccwbk *p_buf;
1774#endif
1775#ifdef FUNCTRACE
1776 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1777#endif
1778 CLAW_DBF_TEXT(4,trace,"hw_tx");
1779#ifdef DEBUGMSG
1780 printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1781 dumpit((char *) skb, sizeof(struct sk_buff));
1782 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1783 dumpit((char *) dev, sizeof(struct net_device));
1784 printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1785#endif
1786 privptr = (struct claw_privbk *) (dev->priv);
1787 p_ch=(struct chbk *)&privptr->channel[WRITE];
1788 p_env =privptr->p_env;
1789#ifdef IOTRACE
1790 printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__FUNCTION__);
1791 dumpit((char *)skb ,sizeof(struct sk_buff));
1792#endif
1793 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1794 /* scan the write queue to free any completed write packets */
1795 p_first_ccw=NULL;
1796 p_last_ccw=NULL;
1797 if ((p_env->packing >= PACK_SEND) &&
1798 (skb->cb[1] != 'P')) {
1799 skb_push(skb,sizeof(struct clawph));
1800 pk_head=(struct clawph *)skb->data;
1801 pk_head->len=skb->len-sizeof(struct clawph);
1802 if (pk_head->len%4) {
1803 pk_head->len+= 4-(pk_head->len%4);
1804 skb_pad(skb,4-(pk_head->len%4));
1805 skb_put(skb,4-(pk_head->len%4));
1806 }
1807 if (p_env->packing == DO_PACKED)
1808 pk_head->link_num = linkid;
1809 else
1810 pk_head->link_num = 0;
1811 pk_head->flag = 0x00;
1812 skb_pad(skb,4);
1813 skb->cb[1] = 'P';
1814 }
1815 if (linkid == 0) {
1816 if (claw_check_busy(dev)) {
1817 if (privptr->write_free_count!=0) {
1818 claw_clear_busy(dev);
1819 }
1820 else {
1821 claw_strt_out_IO(dev );
1822 claw_free_wrt_buf( dev );
1823 if (privptr->write_free_count==0) {
1824#ifdef IOTRACE
1825 printk(KERN_INFO "%s: "
1826 "(claw_check_busy) no free write "
1827 "buffers\n", dev->name);
1828#endif
1829 ch = &privptr->channel[WRITE];
1830 atomic_inc(&skb->users);
1831 skb_queue_tail(&ch->collect_queue, skb);
1832 goto Done;
1833 }
1834 else {
1835 claw_clear_busy(dev);
1836 }
1837 }
1838 }
1839 /* tx lock */
1840 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1841#ifdef DEBUGMSG
1842 printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
1843 "busy)\n", dev->name);
1844#endif
1845 ch = &privptr->channel[WRITE];
1846 atomic_inc(&skb->users);
1847 skb_queue_tail(&ch->collect_queue, skb);
1848 claw_strt_out_IO(dev );
1849 rc=-EBUSY;
1850 goto Done2;
1851 }
1852 }
1853 /* See how many write buffers are required to hold this data */
Julia Lawallf5154fb2008-02-18 14:41:55 +0100[diff] [blame]1854 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1855
1856 /* If that number of buffers isn't available, give up for now */
1857 if (privptr->write_free_count < numBuffers ||
1858 privptr->p_write_free_chain == NULL ) {
1859
1860 claw_setbit_busy(TB_NOBUFFER,dev);
1861
1862#ifdef DEBUGMSG
1863 printk(KERN_INFO "%s: busy (claw_setbit_busy"
1864 "(TB_NOBUFFER))\n", dev->name);
1865 printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
1866 (int)privptr->write_free_count,(int) numBuffers );
1867#endif
1868 ch = &privptr->channel[WRITE];
1869 atomic_inc(&skb->users);
1870 skb_queue_tail(&ch->collect_queue, skb);
1871 CLAW_DBF_TEXT(2,trace,"clawbusy");
1872 goto Done2;
1873 }
1874 pDataAddress=skb->data;
1875 len_of_data=skb->len;
1876
1877 while (len_of_data > 0) {
1878#ifdef DEBUGMSG
1879 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1880 dev->name ,__FUNCTION__,len_of_data);
1881 dumpit((char *)pDataAddress ,64);
1882#endif
1883 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1884 if (p_this_ccw == NULL) { /* lost the race */
1885 ch = &privptr->channel[WRITE];
1886 atomic_inc(&skb->users);
1887 skb_queue_tail(&ch->collect_queue, skb);
1888 goto Done2;
1889 }
1890 privptr->p_write_free_chain=p_this_ccw->next;
1891 p_this_ccw->next=NULL;
1892 --privptr->write_free_count; /* -1 */
1893 bytesInThisBuffer=len_of_data;
1894 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1895 len_of_data-=bytesInThisBuffer;
1896 pDataAddress+=(unsigned long)bytesInThisBuffer;
1897 /* setup write CCW */
1898 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1899 if (len_of_data>0) {
1900 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1901 }
1902 p_this_ccw->write.count=bytesInThisBuffer;
1903 /* now add to end of this chain */
1904 if (p_first_ccw==NULL) {
1905 p_first_ccw=p_this_ccw;
1906 }
1907 if (p_last_ccw!=NULL) {
1908 p_last_ccw->next=p_this_ccw;
1909 /* set up TIC ccws */
1910 p_last_ccw->w_TIC_1.cda=
1911 (__u32)__pa(&p_this_ccw->write);
1912 }
1913 p_last_ccw=p_this_ccw; /* save new last block */
1914#ifdef IOTRACE
1915 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1916 dev->name,__FUNCTION__,bytesInThisBuffer);
1917 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1918 dumpit((char *)p_this_ccw->p_buffer, 64);
1919#endif
1920 }
1921
1922 /* FirstCCW and LastCCW now contain a new set of write channel
1923 * programs to append to the running channel program
1924 */
1925
1926 if (p_first_ccw!=NULL) {
1927 /* setup ending ccw sequence for this segment */
1928 pEnd=privptr->p_end_ccw;
1929 if (pEnd->write1) {
1930 pEnd->write1=0x00; /* second end ccw is now active */
1931 /* set up Tic CCWs */
1932 p_last_ccw->w_TIC_1.cda=
1933 (__u32)__pa(&pEnd->write2_nop1);
1934 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1935 pEnd->write2_nop2.flags =
1936 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1937 pEnd->write2_nop2.cda=0;
1938 pEnd->write2_nop2.count=1;
1939 }
1940 else { /* end of if (pEnd->write1)*/
1941 pEnd->write1=0x01; /* first end ccw is now active */
1942 /* set up Tic CCWs */
1943 p_last_ccw->w_TIC_1.cda=
1944 (__u32)__pa(&pEnd->write1_nop1);
1945 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1946 pEnd->write1_nop2.flags =
1947 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1948 pEnd->write1_nop2.cda=0;
1949 pEnd->write1_nop2.count=1;
1950 } /* end if if (pEnd->write1) */
1951
1952
1953 if (privptr->p_write_active_first==NULL ) {
1954 privptr->p_write_active_first=p_first_ccw;
1955 privptr->p_write_active_last=p_last_ccw;
1956 }
1957 else {
1958
1959 /* set up Tic CCWs */
1960
1961 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1962 tempCCW.count=0;
1963 tempCCW.flags=0;
1964 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1965
1966 if (pEnd->write1) {
1967
1968 /*
1969 * first set of ending CCW's is chained to the new write
1970 * chain, so the second set is chained to the active chain
1971 * Therefore modify the second set to point the new write chain.
1972 * make sure we update the CCW atomically
1973 * so channel does not fetch it when it's only half done
1974 */
1975 memcpy( &pEnd->write2_nop2, &tempCCW ,
1976 sizeof(struct ccw1));
1977 privptr->p_write_active_last->w_TIC_1.cda=
1978 (__u32)__pa(&p_first_ccw->write);
1979 }
1980 else {
1981
1982 /*make sure we update the CCW atomically
1983 *so channel does not fetch it when it's only half done
1984 */
1985 memcpy(&pEnd->write1_nop2, &tempCCW ,
1986 sizeof(struct ccw1));
1987 privptr->p_write_active_last->w_TIC_1.cda=
1988 (__u32)__pa(&p_first_ccw->write);
1989
1990 } /* end if if (pEnd->write1) */
1991
1992 privptr->p_write_active_last->next=p_first_ccw;
1993 privptr->p_write_active_last=p_last_ccw;
1994 }
1995
1996 } /* endif (p_first_ccw!=NULL) */
1997
1998
1999#ifdef IOTRACE
2000 printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
2001 dev->name,__FUNCTION__);
2002 p_buf=privptr->p_write_active_first;
2003 while (p_buf!=NULL) {
2004 dumpit((char *)p_buf, sizeof(struct ccwbk));
2005 p_buf=p_buf->next;
2006 }
2007 p_buf=(struct ccwbk*)privptr->p_end_ccw;
2008 dumpit((char *)p_buf, sizeof(struct endccw));
2009#endif
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]2010 dev_kfree_skb_any(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2011 if (linkid==0) {
2012 lock=LOCK_NO;
2013 }
2014 else {
2015 lock=LOCK_YES;
2016 }
2017 claw_strt_out_IO(dev );
2018 /* if write free count is zero , set NOBUFFER */
2019#ifdef DEBUGMSG
2020 printk(KERN_INFO "%s: %s() > free_count is %d\n",
2021 dev->name,__FUNCTION__,
2022 (int) privptr->write_free_count );
2023#endif
2024 if (privptr->write_free_count==0) {
2025 claw_setbit_busy(TB_NOBUFFER,dev);
2026 }
2027Done2:
2028 claw_clearbit_busy(TB_TX,dev);
2029Done:
2030#ifdef FUNCTRACE
2031 printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2032 dev->name,__FUNCTION__,__LINE__, rc);
2033#endif
2034 return(rc);
2035} /* end of claw_hw_tx */
2036
2037/*-------------------------------------------------------------------*
2038* *
2039* init_ccw_bk *
2040* *
2041*--------------------------------------------------------------------*/
2042
2043static int
2044init_ccw_bk(struct net_device *dev)
2045{
2046
2047 __u32 ccw_blocks_required;
2048 __u32 ccw_blocks_perpage;
2049 __u32 ccw_pages_required;
2050 __u32 claw_reads_perpage=1;
2051 __u32 claw_read_pages;
2052 __u32 claw_writes_perpage=1;
2053 __u32 claw_write_pages;
2054 void *p_buff=NULL;
2055 struct ccwbk*p_free_chain;
2056 struct ccwbk*p_buf;
2057 struct ccwbk*p_last_CCWB;
2058 struct ccwbk*p_first_CCWB;
2059 struct endccw *p_endccw=NULL;
2060 addr_t real_address;
2061 struct claw_privbk *privptr=dev->priv;
2062 struct clawh *pClawH=NULL;
2063 addr_t real_TIC_address;
2064 int i,j;
2065#ifdef FUNCTRACE
2066 printk(KERN_INFO "%s: %s() enter \n",dev->name,__FUNCTION__);
2067#endif
2068 CLAW_DBF_TEXT(4,trace,"init_ccw");
2069#ifdef DEBUGMSG
2070 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2071 dumpit((char *) dev, sizeof(struct net_device));
2072#endif
2073
2074 /* initialize statistics field */
2075 privptr->active_link_ID=0;
2076 /* initialize ccwbk pointers */
2077 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
2078 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2079 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
2080 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
2081 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
2082 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
2083 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
2084 privptr->buffs_alloc = 0;
2085 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2086 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2087 /* initialize free write ccwbk counter */
2088 privptr->write_free_count=0; /* number of free bufs on write chain */
2089 p_last_CCWB = NULL;
2090 p_first_CCWB= NULL;
2091 /*
2092 * We need 1 CCW block for each read buffer, 1 for each
2093 * write buffer, plus 1 for ClawSignalBlock
2094 */
2095 ccw_blocks_required =
2096 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2097#ifdef DEBUGMSG
2098 printk(KERN_INFO "%s: %s() "
2099 "ccw_blocks_required=%d\n",
2100 dev->name,__FUNCTION__,
2101 ccw_blocks_required);
2102 printk(KERN_INFO "%s: %s() "
2103 "PAGE_SIZE=0x%x\n",
2104 dev->name,__FUNCTION__,
2105 (unsigned int)PAGE_SIZE);
2106 printk(KERN_INFO "%s: %s() > "
2107 "PAGE_MASK=0x%x\n",
2108 dev->name,__FUNCTION__,
2109 (unsigned int)PAGE_MASK);
2110#endif
2111 /*
2112 * compute number of CCW blocks that will fit in a page
2113 */
2114 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
2115 ccw_pages_required=
Julia Lawallf5154fb2008-02-18 14:41:55 +0100[diff] [blame]2116 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2117
2118#ifdef DEBUGMSG
2119 printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2120 dev->name,__FUNCTION__,
2121 ccw_blocks_perpage);
2122 printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2123 dev->name,__FUNCTION__,
2124 ccw_pages_required);
2125#endif
2126 /*
2127 * read and write sizes are set by 2 constants in claw.h
2128 * 4k and 32k. Unpacked values other than 4k are not going to
2129 * provide good performance. With packing buffers support 32k
2130 * buffers are used.
2131 */
Julia Lawallf5154fb2008-02-18 14:41:55 +0100[diff] [blame]2132 if (privptr->p_env->read_size < PAGE_SIZE) {
2133 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
2134 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
2135 claw_reads_perpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2136 }
2137 else { /* > or equal */
Julia Lawallf5154fb2008-02-18 14:41:55 +0100[diff] [blame]2138 privptr->p_buff_pages_perread =
2139 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
2140 claw_read_pages = privptr->p_env->read_buffers *
2141 privptr->p_buff_pages_perread;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2142 }
2143 if (privptr->p_env->write_size < PAGE_SIZE) {
Julia Lawallf5154fb2008-02-18 14:41:55 +0100[diff] [blame]2144 claw_writes_perpage =
2145 PAGE_SIZE / privptr->p_env->write_size;
2146 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
2147 claw_writes_perpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2148
2149 }
2150 else { /* > or equal */
Julia Lawallf5154fb2008-02-18 14:41:55 +0100[diff] [blame]2151 privptr->p_buff_pages_perwrite =
2152 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
2153 claw_write_pages = privptr->p_env->write_buffers *
2154 privptr->p_buff_pages_perwrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2155 }
2156#ifdef DEBUGMSG
2157 if (privptr->p_env->read_size < PAGE_SIZE) {
2158 printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2159 dev->name,__FUNCTION__,
2160 claw_reads_perpage);
2161 }
2162 else {
2163 printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2164 dev->name,__FUNCTION__,
2165 privptr->p_buff_pages_perread);
2166 }
2167 printk(KERN_INFO "%s: %s() read_pages=%d\n",
2168 dev->name,__FUNCTION__,
2169 claw_read_pages);
2170 if (privptr->p_env->write_size < PAGE_SIZE) {
2171 printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2172 dev->name,__FUNCTION__,
2173 claw_writes_perpage);
2174 }
2175 else {
2176 printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2177 dev->name,__FUNCTION__,
2178 privptr->p_buff_pages_perwrite);
2179 }
2180 printk(KERN_INFO "%s: %s() write_pages=%d\n",
2181 dev->name,__FUNCTION__,
2182 claw_write_pages);
2183#endif
2184
2185
2186 /*
2187 * allocate ccw_pages_required
2188 */
2189 if (privptr->p_buff_ccw==NULL) {
2190 privptr->p_buff_ccw=
2191 (void *)__get_free_pages(__GFP_DMA,
2192 (int)pages_to_order_of_mag(ccw_pages_required ));
2193 if (privptr->p_buff_ccw==NULL) {
2194 printk(KERN_INFO "%s: %s() "
2195 "__get_free_pages for CCWs failed : "
2196 "pages is %d\n",
2197 dev->name,__FUNCTION__,
2198 ccw_pages_required );
2199#ifdef FUNCTRACE
2200 printk(KERN_INFO "%s: %s() > "
2201 "exit on line %d, rc = ENOMEM\n",
2202 dev->name,__FUNCTION__,
2203 __LINE__);
2204#endif
2205 return -ENOMEM;
2206 }
2207 privptr->p_buff_ccw_num=ccw_pages_required;
2208 }
2209 memset(privptr->p_buff_ccw, 0x00,
2210 privptr->p_buff_ccw_num * PAGE_SIZE);
2211
2212 /*
2213 * obtain ending ccw block address
2214 *
2215 */
2216 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2217 real_address = (__u32)__pa(privptr->p_end_ccw);
2218 /* Initialize ending CCW block */
2219#ifdef DEBUGMSG
2220 printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2221 dev->name,__FUNCTION__);
2222#endif
2223
2224 p_endccw=privptr->p_end_ccw;
2225 p_endccw->real=real_address;
2226 p_endccw->write1=0x00;
2227 p_endccw->read1=0x00;
2228
2229 /* write1_nop1 */
2230 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2231 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2232 p_endccw->write1_nop1.count = 1;
2233 p_endccw->write1_nop1.cda = 0;
2234
2235 /* write1_nop2 */
2236 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2237 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2238 p_endccw->write1_nop2.count = 1;
2239 p_endccw->write1_nop2.cda = 0;
2240
2241 /* write2_nop1 */
2242 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2243 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2244 p_endccw->write2_nop1.count = 1;
2245 p_endccw->write2_nop1.cda = 0;
2246
2247 /* write2_nop2 */
2248 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2249 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2250 p_endccw->write2_nop2.count = 1;
2251 p_endccw->write2_nop2.cda = 0;
2252
2253 /* read1_nop1 */
2254 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2255 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2256 p_endccw->read1_nop1.count = 1;
2257 p_endccw->read1_nop1.cda = 0;
2258
2259 /* read1_nop2 */
2260 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2261 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2262 p_endccw->read1_nop2.count = 1;
2263 p_endccw->read1_nop2.cda = 0;
2264
2265 /* read2_nop1 */
2266 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2267 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2268 p_endccw->read2_nop1.count = 1;
2269 p_endccw->read2_nop1.cda = 0;
2270
2271 /* read2_nop2 */
2272 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2273 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2274 p_endccw->read2_nop2.count = 1;
2275 p_endccw->read2_nop2.cda = 0;
2276
2277#ifdef IOTRACE
2278 printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2279 dev->name,__FUNCTION__);
2280 dumpit((char *)p_endccw, sizeof(struct endccw));
2281#endif
2282
2283 /*
2284 * Build a chain of CCWs
2285 *
2286 */
2287
2288#ifdef DEBUGMSG
2289 printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
2290 dev->name,__FUNCTION__);
2291#endif
2292 p_buff=privptr->p_buff_ccw;
2293
2294 p_free_chain=NULL;
2295 for (i=0 ; i < ccw_pages_required; i++ ) {
2296 real_address = (__u32)__pa(p_buff);
2297 p_buf=p_buff;
2298 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2299 p_buf->next = p_free_chain;
2300 p_free_chain = p_buf;
2301 p_buf->real=(__u32)__pa(p_buf);
2302 ++p_buf;
2303 }
2304 p_buff+=PAGE_SIZE;
2305 }
2306#ifdef DEBUGMSG
2307 printk(KERN_INFO "%s: %s() "
2308 "End build a chain of CCW buffer \n",
2309 dev->name,__FUNCTION__);
2310 p_buf=p_free_chain;
2311 while (p_buf!=NULL) {
2312 dumpit((char *)p_buf, sizeof(struct ccwbk));
2313 p_buf=p_buf->next;
2314 }
2315#endif
2316
2317 /*
2318 * Initialize ClawSignalBlock
2319 *
2320 */
2321#ifdef DEBUGMSG
2322 printk(KERN_INFO "%s: %s() "
2323 "Begin initialize ClawSignalBlock \n",
2324 dev->name,__FUNCTION__);
2325#endif
2326 if (privptr->p_claw_signal_blk==NULL) {
2327 privptr->p_claw_signal_blk=p_free_chain;
2328 p_free_chain=p_free_chain->next;
2329 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2330 pClawH->length=0xffff;
2331 pClawH->opcode=0xff;
2332 pClawH->flag=CLAW_BUSY;
2333 }
2334#ifdef DEBUGMSG
2335 printk(KERN_INFO "%s: %s() > End initialize "
2336 "ClawSignalBlock\n",
2337 dev->name,__FUNCTION__);
2338 dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2339#endif
2340
2341 /*
2342 * allocate write_pages_required and add to free chain
2343 */
2344 if (privptr->p_buff_write==NULL) {
2345 if (privptr->p_env->write_size < PAGE_SIZE) {
2346 privptr->p_buff_write=
2347 (void *)__get_free_pages(__GFP_DMA,
2348 (int)pages_to_order_of_mag(claw_write_pages ));
2349 if (privptr->p_buff_write==NULL) {
2350 printk(KERN_INFO "%s: %s() __get_free_pages for write"
2351 " bufs failed : get is for %d pages\n",
2352 dev->name,__FUNCTION__,claw_write_pages );
2353 free_pages((unsigned long)privptr->p_buff_ccw,
2354 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2355 privptr->p_buff_ccw=NULL;
2356#ifdef FUNCTRACE
2357 printk(KERN_INFO "%s: %s() > exit on line %d,"
2358 "rc = ENOMEM\n",
2359 dev->name,__FUNCTION__,__LINE__);
2360#endif
2361 return -ENOMEM;
2362 }
2363 /*
2364 * Build CLAW write free chain
2365 *
2366 */
2367
2368 memset(privptr->p_buff_write, 0x00,
2369 ccw_pages_required * PAGE_SIZE);
2370#ifdef DEBUGMSG
2371 printk(KERN_INFO "%s: %s() Begin build claw write free "
2372 "chain \n",dev->name,__FUNCTION__);
2373#endif
2374 privptr->p_write_free_chain=NULL;
2375
2376 p_buff=privptr->p_buff_write;
2377
2378 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2379 p_buf = p_free_chain; /* get a CCW */
2380 p_free_chain = p_buf->next;
2381 p_buf->next =privptr->p_write_free_chain;
2382 privptr->p_write_free_chain = p_buf;
2383 p_buf-> p_buffer = (struct clawbuf *)p_buff;
2384 p_buf-> write.cda = (__u32)__pa(p_buff);
2385 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2386 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2387 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2388 p_buf-> w_read_FF.count = 1;
2389 p_buf-> w_read_FF.cda =
2390 (__u32)__pa(&p_buf-> header.flag);
2391 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2392 p_buf-> w_TIC_1.flags = 0;
2393 p_buf-> w_TIC_1.count = 0;
2394
2395 if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2396 ((unsigned long)(p_buff+2*
2397 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2398 p_buff= p_buff+privptr->p_env->write_size;
2399 }
2400 }
2401 }
2402 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2403 {
2404 privptr->p_write_free_chain=NULL;
2405 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2406 p_buff=(void *)__get_free_pages(__GFP_DMA,
2407 (int)pages_to_order_of_mag(
2408 privptr->p_buff_pages_perwrite) );
2409#ifdef IOTRACE
2410 printk(KERN_INFO "%s:%s __get_free_pages "
2411 "for writes buf: get for %d pages\n",
2412 dev->name,__FUNCTION__,
2413 privptr->p_buff_pages_perwrite);
2414#endif
2415 if (p_buff==NULL) {
Joe Perchesceb3dfb2008-01-26 14:11:10 +0100[diff] [blame]2416 printk(KERN_INFO "%s:%s __get_free_pages "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2417 "for writes buf failed : get is for %d pages\n",
2418 dev->name,
2419 __FUNCTION__,
2420 privptr->p_buff_pages_perwrite );
2421 free_pages((unsigned long)privptr->p_buff_ccw,
2422 (int)pages_to_order_of_mag(
2423 privptr->p_buff_ccw_num));
2424 privptr->p_buff_ccw=NULL;
2425 p_buf=privptr->p_buff_write;
2426 while (p_buf!=NULL) {
2427 free_pages((unsigned long)
2428 p_buf->p_buffer,
2429 (int)pages_to_order_of_mag(
2430 privptr->p_buff_pages_perwrite));
2431 p_buf=p_buf->next;
2432 }
2433#ifdef FUNCTRACE
2434 printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2435 dev->name,
2436 __FUNCTION__,
2437 __LINE__);
2438#endif
2439 return -ENOMEM;
2440 } /* Error on get_pages */
2441 memset(p_buff, 0x00, privptr->p_env->write_size );
2442 p_buf = p_free_chain;
2443 p_free_chain = p_buf->next;
2444 p_buf->next = privptr->p_write_free_chain;
2445 privptr->p_write_free_chain = p_buf;
2446 privptr->p_buff_write = p_buf;
2447 p_buf->p_buffer=(struct clawbuf *)p_buff;
2448 p_buf-> write.cda = (__u32)__pa(p_buff);
2449 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2450 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2451 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2452 p_buf-> w_read_FF.count = 1;
2453 p_buf-> w_read_FF.cda =
2454 (__u32)__pa(&p_buf-> header.flag);
2455 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2456 p_buf-> w_TIC_1.flags = 0;
2457 p_buf-> w_TIC_1.count = 0;
2458 } /* for all write_buffers */
2459
2460 } /* else buffers are PAGE_SIZE or bigger */
2461
2462 }
2463 privptr->p_buff_write_num=claw_write_pages;
2464 privptr->write_free_count=privptr->p_env->write_buffers;
2465
2466
2467#ifdef DEBUGMSG
2468 printk(KERN_INFO "%s:%s End build claw write free chain \n",
2469 dev->name,__FUNCTION__);
2470 p_buf=privptr->p_write_free_chain;
2471 while (p_buf!=NULL) {
2472 dumpit((char *)p_buf, sizeof(struct ccwbk));
2473 p_buf=p_buf->next;
2474 }
2475#endif
2476 /*
2477 * allocate read_pages_required and chain to free chain
2478 */
2479 if (privptr->p_buff_read==NULL) {
2480 if (privptr->p_env->read_size < PAGE_SIZE) {
2481 privptr->p_buff_read=
2482 (void *)__get_free_pages(__GFP_DMA,
2483 (int)pages_to_order_of_mag(claw_read_pages) );
2484 if (privptr->p_buff_read==NULL) {
2485 printk(KERN_INFO "%s: %s() "
2486 "__get_free_pages for read buf failed : "
2487 "get is for %d pages\n",
2488 dev->name,__FUNCTION__,claw_read_pages );
2489 free_pages((unsigned long)privptr->p_buff_ccw,
2490 (int)pages_to_order_of_mag(
2491 privptr->p_buff_ccw_num));
2492 /* free the write pages size is < page size */
2493 free_pages((unsigned long)privptr->p_buff_write,
2494 (int)pages_to_order_of_mag(
2495 privptr->p_buff_write_num));
2496 privptr->p_buff_ccw=NULL;
2497 privptr->p_buff_write=NULL;
2498#ifdef FUNCTRACE
2499 printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2500 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2501#endif
2502 return -ENOMEM;
2503 }
2504 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2505 privptr->p_buff_read_num=claw_read_pages;
2506 /*
2507 * Build CLAW read free chain
2508 *
2509 */
2510#ifdef DEBUGMSG
2511 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2512 dev->name,__FUNCTION__);
2513#endif
2514 p_buff=privptr->p_buff_read;
2515 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2516 p_buf = p_free_chain;
2517 p_free_chain = p_buf->next;
2518
2519 if (p_last_CCWB==NULL) {
2520 p_buf->next=NULL;
2521 real_TIC_address=0;
2522 p_last_CCWB=p_buf;
2523 }
2524 else {
2525 p_buf->next=p_first_CCWB;
2526 real_TIC_address=
2527 (__u32)__pa(&p_first_CCWB -> read );
2528 }
2529
2530 p_first_CCWB=p_buf;
2531
2532 p_buf->p_buffer=(struct clawbuf *)p_buff;
2533 /* initialize read command */
2534 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2535 p_buf-> read.cda = (__u32)__pa(p_buff);
2536 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2537 p_buf-> read.count = privptr->p_env->read_size;
2538
2539 /* initialize read_h command */
2540 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2541 p_buf-> read_h.cda =
2542 (__u32)__pa(&(p_buf->header));
2543 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2544 p_buf-> read_h.count = sizeof(struct clawh);
2545
2546 /* initialize Signal command */
2547 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2548 p_buf-> signal.cda =
2549 (__u32)__pa(&(pClawH->flag));
2550 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2551 p_buf-> signal.count = 1;
2552
2553 /* initialize r_TIC_1 command */
2554 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2555 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2556 p_buf-> r_TIC_1.flags = 0;
2557 p_buf-> r_TIC_1.count = 0;
2558
2559 /* initialize r_read_FF command */
2560 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2561 p_buf-> r_read_FF.cda =
2562 (__u32)__pa(&(pClawH->flag));
2563 p_buf-> r_read_FF.flags =
2564 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2565 p_buf-> r_read_FF.count = 1;
2566
2567 /* initialize r_TIC_2 */
2568 memcpy(&p_buf->r_TIC_2,
2569 &p_buf->r_TIC_1, sizeof(struct ccw1));
2570
2571 /* initialize Header */
2572 p_buf->header.length=0xffff;
2573 p_buf->header.opcode=0xff;
2574 p_buf->header.flag=CLAW_PENDING;
2575
2576 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2577 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2578 & PAGE_MASK) ) {
2579 p_buff= p_buff+privptr->p_env->read_size;
2580 }
2581 else {
2582 p_buff=
2583 (void *)((unsigned long)
2584 (p_buff+2*(privptr->p_env->read_size) -1)
2585 & PAGE_MASK) ;
2586 }
2587 } /* for read_buffers */
2588 } /* read_size < PAGE_SIZE */
2589 else { /* read Size >= PAGE_SIZE */
2590
2591#ifdef DEBUGMSG
2592 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2593 dev->name,__FUNCTION__);
2594#endif
2595 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2596 p_buff = (void *)__get_free_pages(__GFP_DMA,
2597 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2598 if (p_buff==NULL) {
2599 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2600 "buf failed : get is for %d pages\n",
2601 dev->name,__FUNCTION__,
2602 privptr->p_buff_pages_perread );
2603 free_pages((unsigned long)privptr->p_buff_ccw,
2604 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2605 /* free the write pages */
2606 p_buf=privptr->p_buff_write;
2607 while (p_buf!=NULL) {
2608 free_pages((unsigned long)p_buf->p_buffer,
2609 (int)pages_to_order_of_mag(
2610 privptr->p_buff_pages_perwrite ));
2611 p_buf=p_buf->next;
2612 }
2613 /* free any read pages already alloc */
2614 p_buf=privptr->p_buff_read;
2615 while (p_buf!=NULL) {
2616 free_pages((unsigned long)p_buf->p_buffer,
2617 (int)pages_to_order_of_mag(
2618 privptr->p_buff_pages_perread ));
2619 p_buf=p_buf->next;
2620 }
2621 privptr->p_buff_ccw=NULL;
2622 privptr->p_buff_write=NULL;
2623#ifdef FUNCTRACE
2624 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2625 dev->name,__FUNCTION__,
2626 __LINE__);
2627#endif
2628 return -ENOMEM;
2629 }
2630 memset(p_buff, 0x00, privptr->p_env->read_size);
2631 p_buf = p_free_chain;
2632 privptr->p_buff_read = p_buf;
2633 p_free_chain = p_buf->next;
2634
2635 if (p_last_CCWB==NULL) {
2636 p_buf->next=NULL;
2637 real_TIC_address=0;
2638 p_last_CCWB=p_buf;
2639 }
2640 else {
2641 p_buf->next=p_first_CCWB;
2642 real_TIC_address=
2643 (addr_t)__pa(
2644 &p_first_CCWB -> read );
2645 }
2646
2647 p_first_CCWB=p_buf;
2648 /* save buff address */
2649 p_buf->p_buffer=(struct clawbuf *)p_buff;
2650 /* initialize read command */
2651 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2652 p_buf-> read.cda = (__u32)__pa(p_buff);
2653 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2654 p_buf-> read.count = privptr->p_env->read_size;
2655
2656 /* initialize read_h command */
2657 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2658 p_buf-> read_h.cda =
2659 (__u32)__pa(&(p_buf->header));
2660 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2661 p_buf-> read_h.count = sizeof(struct clawh);
2662
2663 /* initialize Signal command */
2664 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2665 p_buf-> signal.cda =
2666 (__u32)__pa(&(pClawH->flag));
2667 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2668 p_buf-> signal.count = 1;
2669
2670 /* initialize r_TIC_1 command */
2671 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2672 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2673 p_buf-> r_TIC_1.flags = 0;
2674 p_buf-> r_TIC_1.count = 0;
2675
2676 /* initialize r_read_FF command */
2677 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2678 p_buf-> r_read_FF.cda =
2679 (__u32)__pa(&(pClawH->flag));
2680 p_buf-> r_read_FF.flags =
2681 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2682 p_buf-> r_read_FF.count = 1;
2683
2684 /* initialize r_TIC_2 */
2685 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2686 sizeof(struct ccw1));
2687
2688 /* initialize Header */
2689 p_buf->header.length=0xffff;
2690 p_buf->header.opcode=0xff;
2691 p_buf->header.flag=CLAW_PENDING;
2692
2693 } /* For read_buffers */
2694 } /* read_size >= PAGE_SIZE */
2695 } /* pBuffread = NULL */
2696#ifdef DEBUGMSG
2697 printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
2698 dev->name,__FUNCTION__);
2699 p_buf=p_first_CCWB;
2700 while (p_buf!=NULL) {
2701 dumpit((char *)p_buf, sizeof(struct ccwbk));
2702 p_buf=p_buf->next;
2703 }
2704
2705#endif
2706 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
2707 privptr->buffs_alloc = 1;
2708#ifdef FUNCTRACE
2709 printk(KERN_INFO "%s: %s() exit on line %d\n",
2710 dev->name,__FUNCTION__,__LINE__);
2711#endif
2712 return 0;
2713} /* end of init_ccw_bk */
2714
2715/*-------------------------------------------------------------------*
2716* *
2717* probe_error *
2718* *
2719*--------------------------------------------------------------------*/
2720
2721static void
2722probe_error( struct ccwgroup_device *cgdev)
2723{
2724 struct claw_privbk *privptr;
2725#ifdef FUNCTRACE
2726 printk(KERN_INFO "%s enter \n",__FUNCTION__);
2727#endif
2728 CLAW_DBF_TEXT(4,trace,"proberr");
2729#ifdef DEBUGMSG
2730 printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2731 dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2732#endif
2733 privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2734 if (privptr!=NULL) {
Jesper Juhl17fd6822005-11-07 01:01:30 -0800[diff] [blame]2735 kfree(privptr->p_env);
2736 privptr->p_env=NULL;
2737 kfree(privptr->p_mtc_envelope);
2738 privptr->p_mtc_envelope=NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2739 kfree(privptr);
2740 privptr=NULL;
2741 }
2742#ifdef FUNCTRACE
2743 printk(KERN_INFO "%s > exit on line %d\n",
2744 __FUNCTION__,__LINE__);
2745#endif
2746
2747 return;
2748} /* probe_error */
2749
2750
2751
2752/*-------------------------------------------------------------------*
2753* claw_process_control *
2754* *
2755* *
2756*--------------------------------------------------------------------*/
2757
2758static int
2759claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2760{
2761
2762 struct clawbuf *p_buf;
2763 struct clawctl ctlbk;
2764 struct clawctl *p_ctlbk;
2765 char temp_host_name[8];
2766 char temp_ws_name[8];
2767 struct claw_privbk *privptr;
2768 struct claw_env *p_env;
2769 struct sysval *p_sysval;
2770 struct conncmd *p_connect=NULL;
2771 int rc;
2772 struct chbk *p_ch = NULL;
2773#ifdef FUNCTRACE
2774 printk(KERN_INFO "%s: %s() > enter \n",
2775 dev->name,__FUNCTION__);
2776#endif
2777 CLAW_DBF_TEXT(2,setup,"clw_cntl");
2778#ifdef DEBUGMSG
2779 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2780 dumpit((char *) dev, sizeof(struct net_device));
2781 printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2782 dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2783#endif
2784 udelay(1000); /* Wait a ms for the control packets to
2785 *catch up to each other */
2786 privptr=dev->priv;
2787 p_env=privptr->p_env;
2788 memcpy( &temp_host_name, p_env->host_name, 8);
2789 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2790 printk(KERN_INFO "%s: CLAW device %.8s: "
2791 "Received Control Packet\n",
2792 dev->name, temp_ws_name);
2793 if (privptr->release_pend==1) {
2794#ifdef FUNCTRACE
2795 printk(KERN_INFO "%s: %s() > "
2796 "exit on line %d, rc=0\n",
2797 dev->name,__FUNCTION__,__LINE__);
2798#endif
2799 return 0;
2800 }
2801 p_buf=p_ccw->p_buffer;
2802 p_ctlbk=&ctlbk;
2803 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2804 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2805 } else {
2806 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2807 }
2808#ifdef IOTRACE
2809 printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2810 dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2811#endif
2812 switch (p_ctlbk->command)
2813 {
2814 case SYSTEM_VALIDATE_REQUEST:
2815 if (p_ctlbk->version!=CLAW_VERSION_ID) {
2816 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2817 CLAW_RC_WRONG_VERSION );
2818 printk("%s: %d is wrong version id. "
2819 "Expected %d\n",
2820 dev->name, p_ctlbk->version,
2821 CLAW_VERSION_ID);
2822 }
2823 p_sysval=(struct sysval *)&(p_ctlbk->data);
2824 printk( "%s: Recv Sys Validate Request: "
2825 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2826 "8s,Host name=%.8s\n",
2827 dev->name, p_ctlbk->version,
2828 p_ctlbk->linkid,
2829 p_ctlbk->correlator,
2830 p_sysval->WS_name,
2831 p_sysval->host_name);
2832 if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2833 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2834 CLAW_RC_NAME_MISMATCH );
2835 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2836 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2837 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2838 printk(KERN_INFO "%s: Host name mismatch\n",
2839 dev->name);
2840 printk(KERN_INFO "%s: Received :%s: "
2841 "expected :%s: \n",
2842 dev->name,
2843 p_sysval->host_name,
2844 temp_host_name);
2845 }
2846 if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2847 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2848 CLAW_RC_NAME_MISMATCH );
2849 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2850 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2851 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2852 printk(KERN_INFO "%s: WS name mismatch\n",
2853 dev->name);
2854 printk(KERN_INFO "%s: Received :%s: "
2855 "expected :%s: \n",
2856 dev->name,
2857 p_sysval->WS_name,
2858 temp_ws_name);
2859 }
2860 if (( p_sysval->write_frame_size < p_env->write_size) &&
2861 ( p_env->packing == 0)) {
2862 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2863 CLAW_RC_HOST_RCV_TOO_SMALL );
2864 printk(KERN_INFO "%s: host write size is too "
2865 "small\n", dev->name);
2866 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2867 }
2868 if (( p_sysval->read_frame_size < p_env->read_size) &&
2869 ( p_env->packing == 0)) {
2870 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2871 CLAW_RC_HOST_RCV_TOO_SMALL );
2872 printk(KERN_INFO "%s: host read size is too "
2873 "small\n", dev->name);
2874 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2875 }
2876 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2877 printk("%s: CLAW device %.8s: System validate"
2878 " completed.\n",dev->name, temp_ws_name);
2879 printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2880 p_sysval->read_frame_size,p_sysval->write_frame_size);
2881 privptr->system_validate_comp=1;
2882 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2883 p_env->packing = PACKING_ASK;
2884 }
2885 claw_strt_conn_req(dev);
2886 break;
2887
2888 case SYSTEM_VALIDATE_RESPONSE:
2889 p_sysval=(struct sysval *)&(p_ctlbk->data);
2890 printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2891 "WS name=%.8s,Host name=%.8s\n",
2892 dev->name,
2893 p_ctlbk->version,
2894 p_ctlbk->correlator,
2895 p_ctlbk->rc,
2896 p_sysval->WS_name,
2897 p_sysval->host_name);
2898 switch (p_ctlbk->rc)
2899 {
2900 case 0:
2901 printk(KERN_INFO "%s: CLAW device "
2902 "%.8s: System validate "
2903 "completed.\n",
2904 dev->name, temp_ws_name);
2905 if (privptr->system_validate_comp == 0)
2906 claw_strt_conn_req(dev);
2907 privptr->system_validate_comp=1;
2908 break;
2909 case CLAW_RC_NAME_MISMATCH:
2910 printk(KERN_INFO "%s: Sys Validate "
2911 "Resp : Host, WS name is "
2912 "mismatch\n",
2913 dev->name);
2914 break;
2915 case CLAW_RC_WRONG_VERSION:
2916 printk(KERN_INFO "%s: Sys Validate "
2917 "Resp : Wrong version\n",
2918 dev->name);
2919 break;
2920 case CLAW_RC_HOST_RCV_TOO_SMALL:
2921 printk(KERN_INFO "%s: Sys Validate "
2922 "Resp : bad frame size\n",
2923 dev->name);
2924 break;
2925 default:
2926 printk(KERN_INFO "%s: Sys Validate "
2927 "error code=%d \n",
2928 dev->name, p_ctlbk->rc );
2929 break;
2930 }
2931 break;
2932
2933 case CONNECTION_REQUEST:
2934 p_connect=(struct conncmd *)&(p_ctlbk->data);
2935 printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2936 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2937 dev->name,
2938 p_ctlbk->version,
2939 p_ctlbk->linkid,
2940 p_ctlbk->correlator,
2941 p_connect->host_name,
2942 p_connect->WS_name);
2943 if (privptr->active_link_ID!=0 ) {
2944 claw_snd_disc(dev, p_ctlbk);
2945 printk(KERN_INFO "%s: Conn Req error : "
2946 "already logical link is active \n",
2947 dev->name);
2948 }
2949 if (p_ctlbk->linkid!=1 ) {
2950 claw_snd_disc(dev, p_ctlbk);
2951 printk(KERN_INFO "%s: Conn Req error : "
2952 "req logical link id is not 1\n",
2953 dev->name);
2954 }
2955 rc=find_link(dev,
2956 p_connect->host_name, p_connect->WS_name);
2957 if (rc!=0) {
2958 claw_snd_disc(dev, p_ctlbk);
2959 printk(KERN_INFO "%s: Conn Req error : "
2960 "req appl name does not match\n",
2961 dev->name);
2962 }
2963 claw_send_control(dev,
2964 CONNECTION_CONFIRM, p_ctlbk->linkid,
2965 p_ctlbk->correlator,
2966 0, p_connect->host_name,
2967 p_connect->WS_name);
2968 if (p_env->packing == PACKING_ASK) {
2969 printk("%s: Now Pack ask\n",dev->name);
2970 p_env->packing = PACK_SEND;
2971 claw_snd_conn_req(dev,0);
2972 }
2973 printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2974 "completed link_id=%d.\n",
2975 dev->name, temp_ws_name,
2976 p_ctlbk->linkid);
2977 privptr->active_link_ID=p_ctlbk->linkid;
2978 p_ch=&privptr->channel[WRITE];
2979 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2980 break;
2981 case CONNECTION_RESPONSE:
2982 p_connect=(struct conncmd *)&(p_ctlbk->data);
2983 printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2984 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2985 dev->name,
2986 p_ctlbk->version,
2987 p_ctlbk->linkid,
2988 p_ctlbk->correlator,
2989 p_ctlbk->rc,
2990 p_connect->host_name,
2991 p_connect->WS_name);
2992
2993 if (p_ctlbk->rc !=0 ) {
2994 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
2995 dev->name, p_ctlbk->rc);
2996 return 1;
2997 }
2998 rc=find_link(dev,
2999 p_connect->host_name, p_connect->WS_name);
3000 if (rc!=0) {
3001 claw_snd_disc(dev, p_ctlbk);
3002 printk(KERN_INFO "%s: Conn Resp error: "
3003 "req appl name does not match\n",
3004 dev->name);
3005 }
3006 /* should be until CONNECTION_CONFIRM */
3007 privptr->active_link_ID = - (p_ctlbk->linkid);
3008 break;
3009 case CONNECTION_CONFIRM:
3010 p_connect=(struct conncmd *)&(p_ctlbk->data);
3011 printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3012 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3013 dev->name,
3014 p_ctlbk->version,
3015 p_ctlbk->linkid,
3016 p_ctlbk->correlator,
3017 p_connect->host_name,
3018 p_connect->WS_name);
3019 if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3020 privptr->active_link_ID=p_ctlbk->linkid;
3021 if (p_env->packing > PACKING_ASK) {
3022 printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3023 p_env->packing = DO_PACKED;
3024 }
3025 p_ch=&privptr->channel[WRITE];
3026 wake_up(&p_ch->wait);
3027 }
3028 else {
3029 printk(KERN_INFO "%s: Conn confirm: "
3030 "unexpected linkid=%d \n",
3031 dev->name, p_ctlbk->linkid);
3032 claw_snd_disc(dev, p_ctlbk);
3033 }
3034 break;
3035 case DISCONNECT:
3036 printk(KERN_INFO "%s: Disconnect: "
3037 "Vers=%d,link_id=%d,Corr=%d\n",
3038 dev->name, p_ctlbk->version,
3039 p_ctlbk->linkid, p_ctlbk->correlator);
3040 if ((p_ctlbk->linkid == 2) &&
3041 (p_env->packing == PACK_SEND)) {
3042 privptr->active_link_ID = 1;
3043 p_env->packing = DO_PACKED;
3044 }
3045 else
3046 privptr->active_link_ID=0;
3047 break;
3048 case CLAW_ERROR:
3049 printk(KERN_INFO "%s: CLAW ERROR detected\n",
3050 dev->name);
3051 break;
3052 default:
3053 printk(KERN_INFO "%s: Unexpected command code=%d \n",
3054 dev->name, p_ctlbk->command);
3055 break;
3056 }
3057
3058#ifdef FUNCTRACE
3059 printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3060 dev->name,__FUNCTION__,__LINE__);
3061#endif
3062
3063 return 0;
3064} /* end of claw_process_control */
3065
3066
3067/*-------------------------------------------------------------------*
3068* claw_send_control *
3069* *
3070*--------------------------------------------------------------------*/
3071
3072static int
3073claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3074 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3075{
3076 struct claw_privbk *privptr;
3077 struct clawctl *p_ctl;
3078 struct sysval *p_sysval;
3079 struct conncmd *p_connect;
3080 struct sk_buff *skb;
3081
3082#ifdef FUNCTRACE
3083 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
3084#endif
3085 CLAW_DBF_TEXT(2,setup,"sndcntl");
3086#ifdef DEBUGMSG
3087 printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3088 printk(KERN_INFO "%s: variable type = 0x%X, link = "
3089 "%d, correlator = %d, rc = %d\n",
3090 dev->name,type, link, correlator, rc);
3091 printk(KERN_INFO "%s: variable local_name = %s, "
3092 "remote_name = %s\n",dev->name, local_name, remote_name);
3093#endif
3094 privptr=dev->priv;
3095 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3096
3097 p_ctl->command=type;
3098 p_ctl->version=CLAW_VERSION_ID;
3099 p_ctl->linkid=link;
3100 p_ctl->correlator=correlator;
3101 p_ctl->rc=rc;
3102
3103 p_sysval=(struct sysval *)&p_ctl->data;
3104 p_connect=(struct conncmd *)&p_ctl->data;
3105
3106 switch (p_ctl->command) {
3107 case SYSTEM_VALIDATE_REQUEST:
3108 case SYSTEM_VALIDATE_RESPONSE:
3109 memcpy(&p_sysval->host_name, local_name, 8);
3110 memcpy(&p_sysval->WS_name, remote_name, 8);
3111 if (privptr->p_env->packing > 0) {
3112 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3113 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3114 } else {
3115 /* how big is the piggest group of packets */
3116 p_sysval->read_frame_size=privptr->p_env->read_size;
3117 p_sysval->write_frame_size=privptr->p_env->write_size;
3118 }
3119 memset(&p_sysval->reserved, 0x00, 4);
3120 break;
3121 case CONNECTION_REQUEST:
3122 case CONNECTION_RESPONSE:
3123 case CONNECTION_CONFIRM:
3124 case DISCONNECT:
3125 memcpy(&p_sysval->host_name, local_name, 8);
3126 memcpy(&p_sysval->WS_name, remote_name, 8);
3127 if (privptr->p_env->packing > 0) {
3128 /* How big is the biggest packet */
3129 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3130 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3131 } else {
3132 memset(&p_connect->reserved1, 0x00, 4);
3133 memset(&p_connect->reserved2, 0x00, 4);
3134 }
3135 break;
3136 default:
3137 break;
3138 }
3139
3140 /* write Control Record to the device */
3141
3142
3143 skb = dev_alloc_skb(sizeof(struct clawctl));
3144 if (!skb) {
3145 printk( "%s:%s low on mem, returning...\n",
3146 dev->name,__FUNCTION__);
3147#ifdef DEBUG
3148 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3149 dev->name,__FUNCTION__);
3150#endif
3151 return -ENOMEM;
3152 }
3153 memcpy(skb_put(skb, sizeof(struct clawctl)),
3154 p_ctl, sizeof(struct clawctl));
3155#ifdef IOTRACE
3156 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3157 dumpit((char *)p_ctl,sizeof(struct clawctl));
3158#endif
3159 if (privptr->p_env->packing >= PACK_SEND)
3160 claw_hw_tx(skb, dev, 1);
3161 else
3162 claw_hw_tx(skb, dev, 0);
3163#ifdef FUNCTRACE
3164 printk(KERN_INFO "%s:%s Exit on line %d\n",
3165 dev->name,__FUNCTION__,__LINE__);
3166#endif
3167
3168 return 0;
3169} /* end of claw_send_control */
3170
3171/*-------------------------------------------------------------------*
3172* claw_snd_conn_req *
3173* *
3174*--------------------------------------------------------------------*/
3175static int
3176claw_snd_conn_req(struct net_device *dev, __u8 link)
3177{
3178 int rc;
3179 struct claw_privbk *privptr=dev->priv;
3180 struct clawctl *p_ctl;
3181
3182#ifdef FUNCTRACE
3183 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3184#endif
3185 CLAW_DBF_TEXT(2,setup,"snd_conn");
3186#ifdef DEBUGMSG
3187 printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3188 dumpit((char *) dev, sizeof(struct net_device));
3189#endif
3190 rc = 1;
3191 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3192 p_ctl->linkid = link;
3193 if ( privptr->system_validate_comp==0x00 ) {
3194#ifdef FUNCTRACE
3195 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3196 dev->name,__FUNCTION__,__LINE__);
3197#endif
3198 return rc;
3199 }
3200 if (privptr->p_env->packing == PACKING_ASK )
3201 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3202 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3203 if (privptr->p_env->packing == PACK_SEND) {
3204 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3205 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3206 }
3207 if (privptr->p_env->packing == 0)
3208 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3209 HOST_APPL_NAME, privptr->p_env->api_type);
3210#ifdef FUNCTRACE
3211 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3212 dev->name,__FUNCTION__,__LINE__, rc);
3213#endif
3214 return rc;
3215
3216} /* end of claw_snd_conn_req */
3217
3218
3219/*-------------------------------------------------------------------*
3220* claw_snd_disc *
3221* *
3222*--------------------------------------------------------------------*/
3223
3224static int
3225claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3226{
3227 int rc;
3228 struct conncmd * p_connect;
3229
3230#ifdef FUNCTRACE
3231 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3232#endif
3233 CLAW_DBF_TEXT(2,setup,"snd_dsc");
3234#ifdef DEBUGMSG
3235 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3236 dumpit((char *) dev, sizeof(struct net_device));
3237 printk(KERN_INFO "%s: variable p_ctl",dev->name);
3238 dumpit((char *) p_ctl, sizeof(struct clawctl));
3239#endif
3240 p_connect=(struct conncmd *)&p_ctl->data;
3241
3242 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3243 p_ctl->correlator, 0,
3244 p_connect->host_name, p_connect->WS_name);
3245#ifdef FUNCTRACE
3246 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3247 dev->name,__FUNCTION__, __LINE__, rc);
3248#endif
3249 return rc;
3250} /* end of claw_snd_disc */
3251
3252
3253/*-------------------------------------------------------------------*
3254* claw_snd_sys_validate_rsp *
3255* *
3256*--------------------------------------------------------------------*/
3257
3258static int
3259claw_snd_sys_validate_rsp(struct net_device *dev,
3260 struct clawctl *p_ctl, __u32 return_code)
3261{
3262 struct claw_env * p_env;
3263 struct claw_privbk *privptr;
3264 int rc;
3265
3266#ifdef FUNCTRACE
3267 printk(KERN_INFO "%s:%s Enter\n",
3268 dev->name,__FUNCTION__);
3269#endif
3270 CLAW_DBF_TEXT(2,setup,"chkresp");
3271#ifdef DEBUGMSG
3272 printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3273 dev->name, return_code);
3274 dumpit((char *) dev, sizeof(struct net_device));
3275 printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3276 dumpit((char *) p_ctl, sizeof(struct clawctl));
3277#endif
3278 privptr = dev->priv;
3279 p_env=privptr->p_env;
3280 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3281 p_ctl->linkid,
3282 p_ctl->correlator,
3283 return_code,
3284 p_env->host_name,
3285 p_env->adapter_name );
3286#ifdef FUNCTRACE
3287 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3288 dev->name,__FUNCTION__,__LINE__, rc);
3289#endif
3290 return rc;
3291} /* end of claw_snd_sys_validate_rsp */
3292
3293/*-------------------------------------------------------------------*
3294* claw_strt_conn_req *
3295* *
3296*--------------------------------------------------------------------*/
3297
3298static int
3299claw_strt_conn_req(struct net_device *dev )
3300{
3301 int rc;
3302
3303#ifdef FUNCTRACE
3304 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3305#endif
3306 CLAW_DBF_TEXT(2,setup,"conn_req");
3307#ifdef DEBUGMSG
3308 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3309 dumpit((char *) dev, sizeof(struct net_device));
3310#endif
3311 rc=claw_snd_conn_req(dev, 1);
3312#ifdef FUNCTRACE
3313 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3314 dev->name,__FUNCTION__,__LINE__, rc);
3315#endif
3316 return rc;
3317} /* end of claw_strt_conn_req */
3318
3319
3320
3321/*-------------------------------------------------------------------*
3322 * claw_stats *
3323 *-------------------------------------------------------------------*/
3324
3325static struct
3326net_device_stats *claw_stats(struct net_device *dev)
3327{
3328 struct claw_privbk *privptr;
3329#ifdef FUNCTRACE
3330 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3331#endif
3332 CLAW_DBF_TEXT(4,trace,"stats");
3333 privptr = dev->priv;
3334#ifdef FUNCTRACE
3335 printk(KERN_INFO "%s:%s Exit on line %d\n",
3336 dev->name,__FUNCTION__,__LINE__);
3337#endif
3338 return &privptr->stats;
3339} /* end of claw_stats */
3340
3341
3342/*-------------------------------------------------------------------*
3343* unpack_read *
3344* *
3345*--------------------------------------------------------------------*/
3346static void
3347unpack_read(struct net_device *dev )
3348{
3349 struct sk_buff *skb;
3350 struct claw_privbk *privptr;
3351 struct claw_env *p_env;
3352 struct ccwbk *p_this_ccw;
3353 struct ccwbk *p_first_ccw;
3354 struct ccwbk *p_last_ccw;
3355 struct clawph *p_packh;
3356 void *p_packd;
3357 struct clawctl *p_ctlrec=NULL;
3358
3359 __u32 len_of_data;
3360 __u32 pack_off;
3361 __u8 link_num;
3362 __u8 mtc_this_frm=0;
3363 __u32 bytes_to_mov;
3364 struct chbk *p_ch = NULL;
3365 int i=0;
3366 int p=0;
3367
3368#ifdef FUNCTRACE
3369 printk(KERN_INFO "%s:%s enter \n",dev->name,__FUNCTION__);
3370#endif
3371 CLAW_DBF_TEXT(4,trace,"unpkread");
3372 p_first_ccw=NULL;
3373 p_last_ccw=NULL;
3374 p_packh=NULL;
3375 p_packd=NULL;
3376 privptr=dev->priv;
3377 p_env = privptr->p_env;
3378 p_this_ccw=privptr->p_read_active_first;
3379 i=0;
3380 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3381#ifdef IOTRACE
3382 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3383 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3384 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3385 " pk=%d \n",dev->name,p_env->packing);
3386 dumpit((char *)p_this_ccw->p_buffer, 64 );
3387#endif
3388 pack_off = 0;
3389 p = 0;
3390 p_this_ccw->header.flag=CLAW_PENDING;
3391 privptr->p_read_active_first=p_this_ccw->next;
3392 p_this_ccw->next=NULL;
3393 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3394 if ((p_env->packing == PACK_SEND) &&
3395 (p_packh->len == 32) &&
3396 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
3397 p_packh++; /* peek past pack header */
3398 p_ctlrec = (struct clawctl *)p_packh;
3399 p_packh--; /* un peek */
3400 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3401 (p_ctlrec->command == CONNECTION_CONFIRM))
3402 p_env->packing = DO_PACKED;
3403 }
3404 if (p_env->packing == DO_PACKED)
3405 link_num=p_packh->link_num;
3406 else
3407 link_num=p_this_ccw->header.opcode / 8;
3408 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3409#ifdef DEBUGMSG
3410 printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3411 dev->name,__FUNCTION__);
3412#endif
3413 mtc_this_frm=1;
3414 if (p_this_ccw->header.length!=
3415 privptr->p_env->read_size ) {
3416 printk(KERN_INFO " %s: Invalid frame detected "
3417 "length is %02x\n" ,
3418 dev->name, p_this_ccw->header.length);
3419 }
3420 }
3421
3422 if (privptr->mtc_skipping) {
3423 /*
3424 * We're in the mode of skipping past a
3425 * multi-frame message
3426 * that we can't process for some reason or other.
3427 * The first frame without the More-To-Come flag is
3428 * the last frame of the skipped message.
3429 */
3430 /* in case of More-To-Come not set in this frame */
3431 if (mtc_this_frm==0) {
3432 privptr->mtc_skipping=0; /* Ok, the end */
3433 privptr->mtc_logical_link=-1;
3434 }
3435#ifdef DEBUGMSG
3436 printk(KERN_INFO "%s:%s goto next "
3437 "frame from MoretoComeSkip \n",
3438 dev->name,__FUNCTION__);
3439#endif
3440 goto NextFrame;
3441 }
3442
3443 if (link_num==0) {
3444 claw_process_control(dev, p_this_ccw);
3445#ifdef DEBUGMSG
3446 printk(KERN_INFO "%s:%s goto next "
3447 "frame from claw_process_control \n",
3448 dev->name,__FUNCTION__);
3449#endif
3450 CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3451 goto NextFrame;
3452 }
3453unpack_next:
3454 if (p_env->packing == DO_PACKED) {
3455 if (pack_off > p_env->read_size)
3456 goto NextFrame;
3457 p_packd = p_this_ccw->p_buffer+pack_off;
3458 p_packh = (struct clawph *) p_packd;
3459 if ((p_packh->len == 0) || /* all done with this frame? */
3460 (p_packh->flag != 0))
3461 goto NextFrame;
3462 bytes_to_mov = p_packh->len;
3463 pack_off += bytes_to_mov+sizeof(struct clawph);
3464 p++;
3465 } else {
3466 bytes_to_mov=p_this_ccw->header.length;
3467 }
3468 if (privptr->mtc_logical_link<0) {
3469#ifdef DEBUGMSG
3470 printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
3471 dev->name,__FUNCTION__);
3472#endif
3473
3474 /*
3475 * if More-To-Come is set in this frame then we don't know
3476 * length of entire message, and hence have to allocate
3477 * large buffer */
3478
3479 /* We are starting a new envelope */
3480 privptr->mtc_offset=0;
3481 privptr->mtc_logical_link=link_num;
3482 }
3483
3484 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3485 /* error */
3486#ifdef DEBUGMSG
3487 printk(KERN_INFO "%s: %s > goto next "
3488 "frame from MoretoComeSkip \n",
3489 dev->name,
3490 __FUNCTION__);
3491 printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
3492 "SIZE-privptr->mtc_offset %d)\n",
3493 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3494#endif
3495 privptr->stats.rx_frame_errors++;
3496 goto NextFrame;
3497 }
3498 if (p_env->packing == DO_PACKED) {
3499 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3500 p_packd+sizeof(struct clawph), bytes_to_mov);
3501
3502 } else {
3503 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3504 p_this_ccw->p_buffer, bytes_to_mov);
3505 }
3506#ifdef DEBUGMSG
3507 printk(KERN_INFO "%s: %s() received data \n",
3508 dev->name,__FUNCTION__);
3509 if (p_env->packing == DO_PACKED)
3510 dumpit((char *)p_packd+sizeof(struct clawph),32);
3511 else
3512 dumpit((char *)p_this_ccw->p_buffer, 32);
3513 printk(KERN_INFO "%s: %s() bytelength %d \n",
3514 dev->name,__FUNCTION__,bytes_to_mov);
3515#endif
3516 if (mtc_this_frm==0) {
3517 len_of_data=privptr->mtc_offset+bytes_to_mov;
3518 skb=dev_alloc_skb(len_of_data);
3519 if (skb) {
3520 memcpy(skb_put(skb,len_of_data),
3521 privptr->p_mtc_envelope,
3522 len_of_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3523 skb->dev=dev;
Arnaldo Carvalho de Melo98e399f2007-03-19 15:33:04 -0700[diff] [blame]3524 skb_reset_mac_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3525 skb->protocol=htons(ETH_P_IP);
3526 skb->ip_summed=CHECKSUM_UNNECESSARY;
3527 privptr->stats.rx_packets++;
3528 privptr->stats.rx_bytes+=len_of_data;
3529 netif_rx(skb);
3530#ifdef DEBUGMSG
3531 printk(KERN_INFO "%s: %s() netif_"
3532 "rx(skb) completed \n",
3533 dev->name,__FUNCTION__);
3534#endif
3535 }
3536 else {
3537 privptr->stats.rx_dropped++;
3538 printk(KERN_WARNING "%s: %s() low on memory\n",
3539 dev->name,__FUNCTION__);
3540 }
3541 privptr->mtc_offset=0;
3542 privptr->mtc_logical_link=-1;
3543 }
3544 else {
3545 privptr->mtc_offset+=bytes_to_mov;
3546 }
3547 if (p_env->packing == DO_PACKED)
3548 goto unpack_next;
3549NextFrame:
3550 /*
3551 * Remove ThisCCWblock from active read queue, and add it
3552 * to queue of free blocks to be reused.
3553 */
3554 i++;
3555 p_this_ccw->header.length=0xffff;
3556 p_this_ccw->header.opcode=0xff;
3557 /*
3558 * add this one to the free queue for later reuse
3559 */
3560 if (p_first_ccw==NULL) {
3561 p_first_ccw = p_this_ccw;
3562 }
3563 else {
3564 p_last_ccw->next = p_this_ccw;
3565 }
3566 p_last_ccw = p_this_ccw;
3567 /*
3568 * chain to next block on active read queue
3569 */
3570 p_this_ccw = privptr->p_read_active_first;
3571 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3572 } /* end of while */
3573
3574 /* check validity */
3575
3576#ifdef IOTRACE
3577 printk(KERN_INFO "%s:%s processed frame is %d \n",
3578 dev->name,__FUNCTION__,i);
3579 printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
3580 dev->name,
3581 __FUNCTION__,
3582 (unsigned long)p_first_ccw,
3583 (unsigned long)p_last_ccw);
3584#endif
3585 CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3586 add_claw_reads(dev, p_first_ccw, p_last_ccw);
3587 p_ch=&privptr->channel[READ];
3588 claw_strt_read(dev, LOCK_YES);
3589#ifdef FUNCTRACE
3590 printk(KERN_INFO "%s: %s exit on line %d\n",
3591 dev->name, __FUNCTION__, __LINE__);
3592#endif
3593 return;
3594} /* end of unpack_read */
3595
3596/*-------------------------------------------------------------------*
3597* claw_strt_read *
3598* *
3599*--------------------------------------------------------------------*/
3600static void
3601claw_strt_read (struct net_device *dev, int lock )
3602{
3603 int rc = 0;
3604 __u32 parm;
3605 unsigned long saveflags = 0;
3606 struct claw_privbk *privptr=dev->priv;
3607 struct ccwbk*p_ccwbk;
3608 struct chbk *p_ch;
3609 struct clawh *p_clawh;
3610 p_ch=&privptr->channel[READ];
3611
3612#ifdef FUNCTRACE
3613 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3614 printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3615 dumpit((char *) dev, sizeof(struct net_device));
3616#endif
3617 CLAW_DBF_TEXT(4,trace,"StRdNter");
3618 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3619 p_clawh->flag=CLAW_IDLE; /* 0x00 */
3620
3621 if ((privptr->p_write_active_first!=NULL &&
3622 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3623 (privptr->p_read_active_first!=NULL &&
3624 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3625 p_clawh->flag=CLAW_BUSY; /* 0xff */
3626 }
3627#ifdef DEBUGMSG
3628 printk(KERN_INFO "%s:%s state-%02x\n" ,
3629 dev->name,__FUNCTION__, p_ch->claw_state);
3630#endif
3631 if (lock==LOCK_YES) {
3632 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3633 }
3634 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3635#ifdef DEBUGMSG
3636 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3637 dev->name,__FUNCTION__);
3638 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3639 dumpit((char *)&p_clawh->flag , 1);
3640#endif
3641 CLAW_DBF_TEXT(4,trace,"HotRead");
3642 p_ccwbk=privptr->p_read_active_first;
3643 parm = (unsigned long) p_ch;
3644 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3645 0xff, 0);
3646 if (rc != 0) {
3647 ccw_check_return_code(p_ch->cdev, rc);
3648 }
3649 }
3650 else {
3651#ifdef DEBUGMSG
3652 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3653 dev->name,__FUNCTION__);
3654#endif
3655 CLAW_DBF_TEXT(2,trace,"ReadAct");
3656 }
3657
3658 if (lock==LOCK_YES) {
3659 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3660 }
3661#ifdef FUNCTRACE
3662 printk(KERN_INFO "%s:%s Exit on line %d\n",
3663 dev->name,__FUNCTION__,__LINE__);
3664#endif
3665 CLAW_DBF_TEXT(4,trace,"StRdExit");
3666 return;
3667} /* end of claw_strt_read */
3668
3669/*-------------------------------------------------------------------*
3670* claw_strt_out_IO *
3671* *
3672*--------------------------------------------------------------------*/
3673
3674static void
3675claw_strt_out_IO( struct net_device *dev )
3676{
3677 int rc = 0;
3678 unsigned long parm;
3679 struct claw_privbk *privptr;
3680 struct chbk *p_ch;
3681 struct ccwbk *p_first_ccw;
3682
3683#ifdef FUNCTRACE
3684 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3685#endif
3686 if (!dev) {
3687 return;
3688 }
3689 privptr=(struct claw_privbk *)dev->priv;
3690 p_ch=&privptr->channel[WRITE];
3691
3692#ifdef DEBUGMSG
3693 printk(KERN_INFO "%s:%s state-%02x\n" ,
3694 dev->name,__FUNCTION__,p_ch->claw_state);
3695#endif
3696 CLAW_DBF_TEXT(4,trace,"strt_io");
3697 p_first_ccw=privptr->p_write_active_first;
3698
3699 if (p_ch->claw_state == CLAW_STOP)
3700 return;
3701 if (p_first_ccw == NULL) {
3702#ifdef FUNCTRACE
3703 printk(KERN_INFO "%s:%s Exit on line %d\n",
3704 dev->name,__FUNCTION__,__LINE__);
3705#endif
3706 return;
3707 }
3708 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3709 parm = (unsigned long) p_ch;
3710#ifdef DEBUGMSG
3711 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3712 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3713#endif
3714 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3715 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3716 0xff, 0);
3717 if (rc != 0) {
3718 ccw_check_return_code(p_ch->cdev, rc);
3719 }
3720 }
3721 dev->trans_start = jiffies;
3722#ifdef FUNCTRACE
3723 printk(KERN_INFO "%s:%s Exit on line %d\n",
3724 dev->name,__FUNCTION__,__LINE__);
3725#endif
3726
3727 return;
3728} /* end of claw_strt_out_IO */
3729
3730/*-------------------------------------------------------------------*
3731* Free write buffers *
3732* *
3733*--------------------------------------------------------------------*/
3734
3735static void
3736claw_free_wrt_buf( struct net_device *dev )
3737{
3738
3739 struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3740 struct ccwbk*p_first_ccw;
3741 struct ccwbk*p_last_ccw;
3742 struct ccwbk*p_this_ccw;
3743 struct ccwbk*p_next_ccw;
3744#ifdef IOTRACE
3745 struct ccwbk*p_buf;
3746#endif
3747#ifdef FUNCTRACE
3748 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3749 printk(KERN_INFO "%s: free count = %d variable dev =\n",
3750 dev->name,privptr->write_free_count);
3751#endif
3752 CLAW_DBF_TEXT(4,trace,"freewrtb");
3753 /* scan the write queue to free any completed write packets */
3754 p_first_ccw=NULL;
3755 p_last_ccw=NULL;
3756#ifdef IOTRACE
3757 printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
3758 p_buf=privptr->p_write_active_first;
3759 while (p_buf!=NULL) {
3760 dumpit((char *)p_buf, sizeof(struct ccwbk));
3761 p_buf=p_buf->next;
3762 }
3763 if (p_buf==NULL) {
3764 printk(KERN_INFO "%s: privptr->p_write_"
3765 "active_first==NULL\n",dev->name );
3766 }
3767 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3768 dumpit((char *)p_buf, sizeof(struct endccw));
3769#endif
3770 p_this_ccw=privptr->p_write_active_first;
3771 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3772 {
3773 p_next_ccw = p_this_ccw->next;
3774 if (((p_next_ccw!=NULL) &&
3775 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3776 ((p_this_ccw == privptr->p_write_active_last) &&
3777 (p_this_ccw->header.flag!=CLAW_PENDING))) {
3778 /* The next CCW is OK or this is */
3779 /* the last CCW...free it @A1A */
3780 privptr->p_write_active_first=p_this_ccw->next;
3781 p_this_ccw->header.flag=CLAW_PENDING;
3782 p_this_ccw->next=privptr->p_write_free_chain;
3783 privptr->p_write_free_chain=p_this_ccw;
3784 ++privptr->write_free_count;
3785 privptr->stats.tx_bytes+= p_this_ccw->write.count;
3786 p_this_ccw=privptr->p_write_active_first;
3787 privptr->stats.tx_packets++;
3788 }
3789 else {
3790 break;
3791 }
3792 }
3793 if (privptr->write_free_count!=0) {
3794 claw_clearbit_busy(TB_NOBUFFER,dev);
3795 }
3796 /* whole chain removed? */
3797 if (privptr->p_write_active_first==NULL) {
3798 privptr->p_write_active_last=NULL;
3799#ifdef DEBUGMSG
3800 printk(KERN_INFO "%s:%s p_write_"
3801 "active_first==NULL\n",dev->name,__FUNCTION__);
3802#endif
3803 }
3804#ifdef IOTRACE
3805 printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
3806 p_buf=privptr->p_write_active_first;
3807 while (p_buf!=NULL) {
3808 dumpit((char *)p_buf, sizeof(struct ccwbk));
3809 p_buf=p_buf->next;
3810 }
3811 if (p_buf==NULL) {
3812 printk(KERN_INFO "%s: privptr->p_write_active_"
3813 "first==NULL\n",dev->name );
3814 }
3815 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3816 dumpit((char *)p_buf, sizeof(struct endccw));
3817#endif
3818
3819 CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3820#ifdef FUNCTRACE
3821 printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3822 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3823#endif
3824 return;
3825}
3826
3827/*-------------------------------------------------------------------*
3828* claw free netdevice *
3829* *
3830*--------------------------------------------------------------------*/
3831static void
3832claw_free_netdevice(struct net_device * dev, int free_dev)
3833{
3834 struct claw_privbk *privptr;
3835#ifdef FUNCTRACE
3836 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3837#endif
3838 CLAW_DBF_TEXT(2,setup,"free_dev");
3839
3840 if (!dev)
3841 return;
3842 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3843 privptr = dev->priv;
3844 if (dev->flags & IFF_RUNNING)
3845 claw_release(dev);
3846 if (privptr) {
3847 privptr->channel[READ].ndev = NULL; /* say it's free */
3848 }
3849 dev->priv=NULL;
3850#ifdef MODULE
3851 if (free_dev) {
3852 free_netdev(dev);
3853 }
3854#endif
3855 CLAW_DBF_TEXT(2,setup,"feee_ok");
3856#ifdef FUNCTRACE
3857 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3858#endif
3859}
3860
3861/**
3862 * Claw init netdevice
3863 * Initialize everything of the net device except the name and the
3864 * channel structs.
3865 */
3866static void
3867claw_init_netdevice(struct net_device * dev)
3868{
3869#ifdef FUNCTRACE
3870 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3871#endif
3872 CLAW_DBF_TEXT(2,setup,"init_dev");
3873 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3874 if (!dev) {
3875 printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3876 __FUNCTION__,__LINE__);
3877 CLAW_DBF_TEXT(2,setup,"baddev");
3878 return;
3879 }
3880 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3881 dev->hard_start_xmit = claw_tx;
3882 dev->open = claw_open;
3883 dev->stop = claw_release;
3884 dev->get_stats = claw_stats;
3885 dev->change_mtu = claw_change_mtu;
3886 dev->hard_header_len = 0;
3887 dev->addr_len = 0;
3888 dev->type = ARPHRD_SLIP;
3889 dev->tx_queue_len = 1300;
3890 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3891#ifdef FUNCTRACE
3892 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3893#endif
3894 CLAW_DBF_TEXT(2,setup,"initok");
3895 return;
3896}
3897
3898/**
3899 * Init a new channel in the privptr->channel[i].
3900 *
3901 * @param cdev The ccw_device to be added.
3902 *
3903 * @return 0 on success, !0 on error.
3904 */
3905static int
3906add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3907{
3908 struct chbk *p_ch;
Cornelia Huckdc5bc0c2007-06-20 13:00:20 +0200[diff] [blame]3909 struct ccw_dev_id dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3910
3911#ifdef FUNCTRACE
3912 printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3913#endif
3914 CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3915 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
3916 p_ch = &privptr->channel[i];
3917 p_ch->cdev = cdev;
3918 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
Cornelia Huckdc5bc0c2007-06-20 13:00:20 +0200[diff] [blame]3919 ccw_device_get_id(cdev, &dev_id);
3920 p_ch->devno = dev_id.devno;
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700[diff] [blame]3921 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3922 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3923 p_ch->id,__FUNCTION__);
3924#ifdef FUNCTRACE
3925 printk(KERN_INFO "%s:%s Exit on line %d\n",
3926 p_ch->id,__FUNCTION__,__LINE__);
3927#endif
3928 return -ENOMEM;
3929 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3930#ifdef FUNCTRACE
3931 printk(KERN_INFO "%s:%s Exit on line %d\n",
3932 cdev->dev.bus_id,__FUNCTION__,__LINE__);
3933#endif
3934 return 0;
3935}
3936
3937
3938/**
3939 *
3940 * Setup an interface.
3941 *
3942 * @param cgdev Device to be setup.
3943 *
3944 * @returns 0 on success, !0 on failure.
3945 */
3946static int
3947claw_new_device(struct ccwgroup_device *cgdev)
3948{
3949 struct claw_privbk *privptr;
3950 struct claw_env *p_env;
3951 struct net_device *dev;
3952 int ret;
Cornelia Huckdc5bc0c2007-06-20 13:00:20 +0200[diff] [blame]3953 struct ccw_dev_id dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3954
3955 pr_debug("%s() called\n", __FUNCTION__);
3956 printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3957 CLAW_DBF_TEXT(2,setup,"new_dev");
3958 privptr = cgdev->dev.driver_data;
3959 cgdev->cdev[READ]->dev.driver_data = privptr;
3960 cgdev->cdev[WRITE]->dev.driver_data = privptr;
3961 if (!privptr)
3962 return -ENODEV;
3963 p_env = privptr->p_env;
Cornelia Huckdc5bc0c2007-06-20 13:00:20 +0200[diff] [blame]3964 ccw_device_get_id(cgdev->cdev[READ], &dev_id);
3965 p_env->devno[READ] = dev_id.devno;
3966 ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
3967 p_env->devno[WRITE] = dev_id.devno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3968 ret = add_channel(cgdev->cdev[0],0,privptr);
3969 if (ret == 0)
3970 ret = add_channel(cgdev->cdev[1],1,privptr);
3971 if (ret != 0) {
3972 printk(KERN_WARNING
3973 "add channel failed "
3974 "with ret = %d\n", ret);
3975 goto out;
3976 }
3977 ret = ccw_device_set_online(cgdev->cdev[READ]);
3978 if (ret != 0) {
3979 printk(KERN_WARNING
3980 "claw: ccw_device_set_online %s READ failed "
3981 "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3982 goto out;
3983 }
3984 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3985 if (ret != 0) {
3986 printk(KERN_WARNING
3987 "claw: ccw_device_set_online %s WRITE failed "
3988 "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
3989 goto out;
3990 }
3991 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
3992 if (!dev) {
3993 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
3994 goto out;
3995 }
3996 dev->priv = privptr;
3997 cgdev->dev.driver_data = privptr;
3998 cgdev->cdev[READ]->dev.driver_data = privptr;
3999 cgdev->cdev[WRITE]->dev.driver_data = privptr;
4000 /* sysfs magic */
4001 SET_NETDEV_DEV(dev, &cgdev->dev);
4002 if (register_netdev(dev) != 0) {
4003 claw_free_netdevice(dev, 1);
4004 CLAW_DBF_TEXT(2,trace,"regfail");
4005 goto out;
4006 }
4007 dev->flags &=~IFF_RUNNING;
4008 if (privptr->buffs_alloc == 0) {
4009 ret=init_ccw_bk(dev);
4010 if (ret !=0) {
4011 printk(KERN_WARNING
4012 "claw: init_ccw_bk failed with ret=%d\n", ret);
4013 unregister_netdev(dev);
4014 claw_free_netdevice(dev,1);
4015 CLAW_DBF_TEXT(2,trace,"ccwmem");
4016 goto out;
4017 }
4018 }
4019 privptr->channel[READ].ndev = dev;
4020 privptr->channel[WRITE].ndev = dev;
4021 privptr->p_env->ndev = dev;
4022
4023 printk(KERN_INFO "%s:readsize=%d writesize=%d "
4024 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4025 dev->name, p_env->read_size,
4026 p_env->write_size, p_env->read_buffers,
4027 p_env->write_buffers, p_env->devno[READ],
4028 p_env->devno[WRITE]);
4029 printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4030 ":%.8s api_type: %.8s\n",
4031 dev->name, p_env->host_name,
4032 p_env->adapter_name , p_env->api_type);
4033 return 0;
4034out:
4035 ccw_device_set_offline(cgdev->cdev[1]);
4036 ccw_device_set_offline(cgdev->cdev[0]);
4037
4038 return -ENODEV;
4039}
4040
4041static void
4042claw_purge_skb_queue(struct sk_buff_head *q)
4043{
4044 struct sk_buff *skb;
4045
4046 CLAW_DBF_TEXT(4,trace,"purgque");
4047
4048 while ((skb = skb_dequeue(q))) {
4049 atomic_dec(&skb->users);
Frank Pavlic8e84c802005-09-06 15:03:09 +0200[diff] [blame]4050 dev_kfree_skb_any(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4051 }
4052}
4053
4054/**
4055 * Shutdown an interface.
4056 *
4057 * @param cgdev Device to be shut down.
4058 *
4059 * @returns 0 on success, !0 on failure.
4060 */
4061static int
4062claw_shutdown_device(struct ccwgroup_device *cgdev)
4063{
4064 struct claw_privbk *priv;
4065 struct net_device *ndev;
4066 int ret;
4067
4068 pr_debug("%s() called\n", __FUNCTION__);
4069 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4070 priv = cgdev->dev.driver_data;
4071 if (!priv)
4072 return -ENODEV;
4073 ndev = priv->channel[READ].ndev;
4074 if (ndev) {
4075 /* Close the device */
4076 printk(KERN_INFO
4077 "%s: shuting down \n",ndev->name);
4078 if (ndev->flags & IFF_RUNNING)
4079 ret = claw_release(ndev);
4080 ndev->flags &=~IFF_RUNNING;
4081 unregister_netdev(ndev);
4082 ndev->priv = NULL; /* cgdev data, not ndev's to free */
4083 claw_free_netdevice(ndev, 1);
4084 priv->channel[READ].ndev = NULL;
4085 priv->channel[WRITE].ndev = NULL;
4086 priv->p_env->ndev = NULL;
4087 }
4088 ccw_device_set_offline(cgdev->cdev[1]);
4089 ccw_device_set_offline(cgdev->cdev[0]);
4090 return 0;
4091}
4092
4093static void
4094claw_remove_device(struct ccwgroup_device *cgdev)
4095{
4096 struct claw_privbk *priv;
4097
4098 pr_debug("%s() called\n", __FUNCTION__);
4099 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4100 priv = cgdev->dev.driver_data;
4101 if (!priv) {
4102 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4103 return;
4104 }
4105 printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4106 __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4107 if (cgdev->state == CCWGROUP_ONLINE)
4108 claw_shutdown_device(cgdev);
4109 claw_remove_files(&cgdev->dev);
Jesper Juhl17fd6822005-11-07 01:01:30 -0800[diff] [blame]4110 kfree(priv->p_mtc_envelope);
4111 priv->p_mtc_envelope=NULL;
4112 kfree(priv->p_env);
4113 priv->p_env=NULL;
4114 kfree(priv->channel[0].irb);
4115 priv->channel[0].irb=NULL;
4116 kfree(priv->channel[1].irb);
4117 priv->channel[1].irb=NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4118 kfree(priv);
4119 cgdev->dev.driver_data=NULL;
4120 cgdev->cdev[READ]->dev.driver_data = NULL;
4121 cgdev->cdev[WRITE]->dev.driver_data = NULL;
4122 put_device(&cgdev->dev);
4123}
4124
4125
4126/*
4127 * sysfs attributes
4128 */
4129static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4130claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4131{
4132 struct claw_privbk *priv;
4133 struct claw_env * p_env;
4134
4135 priv = dev->driver_data;
4136 if (!priv)
4137 return -ENODEV;
4138 p_env = priv->p_env;
4139 return sprintf(buf, "%s\n",p_env->host_name);
4140}
4141
4142static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4143claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4144{
4145 struct claw_privbk *priv;
4146 struct claw_env * p_env;
4147
4148 priv = dev->driver_data;
4149 if (!priv)
4150 return -ENODEV;
4151 p_env = priv->p_env;
4152 if (count > MAX_NAME_LEN+1)
4153 return -EINVAL;
4154 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4155 strncpy(p_env->host_name,buf, count);
4156 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
4157 p_env->host_name[MAX_NAME_LEN] = 0x00;
4158 CLAW_DBF_TEXT(2,setup,"HstnSet");
4159 CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4160
4161 return count;
4162}
4163
4164static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4165
4166static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4167claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4168{
4169 struct claw_privbk *priv;
4170 struct claw_env * p_env;
4171
4172 priv = dev->driver_data;
4173 if (!priv)
4174 return -ENODEV;
4175 p_env = priv->p_env;
4176 return sprintf(buf, "%s\n",p_env->adapter_name);
4177}
4178
4179static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4180claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4181{
4182 struct claw_privbk *priv;
4183 struct claw_env * p_env;
4184
4185 priv = dev->driver_data;
4186 if (!priv)
4187 return -ENODEV;
4188 p_env = priv->p_env;
4189 if (count > MAX_NAME_LEN+1)
4190 return -EINVAL;
4191 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4192 strncpy(p_env->adapter_name,buf, count);
4193 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4194 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4195 CLAW_DBF_TEXT(2,setup,"AdnSet");
4196 CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4197
4198 return count;
4199}
4200
4201static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4202
4203static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4204claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4205{
4206 struct claw_privbk *priv;
4207 struct claw_env * p_env;
4208
4209 priv = dev->driver_data;
4210 if (!priv)
4211 return -ENODEV;
4212 p_env = priv->p_env;
4213 return sprintf(buf, "%s\n",
4214 p_env->api_type);
4215}
4216
4217static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4218claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4219{
4220 struct claw_privbk *priv;
4221 struct claw_env * p_env;
4222
4223 priv = dev->driver_data;
4224 if (!priv)
4225 return -ENODEV;
4226 p_env = priv->p_env;
4227 if (count > MAX_NAME_LEN+1)
4228 return -EINVAL;
4229 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4230 strncpy(p_env->api_type,buf, count);
4231 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
4232 p_env->api_type[MAX_NAME_LEN] = 0x00;
4233 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4234 p_env->read_size=DEF_PACK_BUFSIZE;
4235 p_env->write_size=DEF_PACK_BUFSIZE;
4236 p_env->packing=PACKING_ASK;
4237 CLAW_DBF_TEXT(2,setup,"PACKING");
4238 }
4239 else {
4240 p_env->packing=0;
4241 p_env->read_size=CLAW_FRAME_SIZE;
4242 p_env->write_size=CLAW_FRAME_SIZE;
4243 CLAW_DBF_TEXT(2,setup,"ApiSet");
4244 }
4245 CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4246 return count;
4247}
4248
4249static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4250
4251static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4252claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4253{
4254 struct claw_privbk *priv;
4255 struct claw_env * p_env;
4256
4257 priv = dev->driver_data;
4258 if (!priv)
4259 return -ENODEV;
4260 p_env = priv->p_env;
4261 return sprintf(buf, "%d\n", p_env->write_buffers);
4262}
4263
4264static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4265claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4266{
4267 struct claw_privbk *priv;
4268 struct claw_env * p_env;
4269 int nnn,max;
4270
4271 priv = dev->driver_data;
4272 if (!priv)
4273 return -ENODEV;
4274 p_env = priv->p_env;
4275 sscanf(buf, "%i", &nnn);
4276 if (p_env->packing) {
4277 max = 64;
4278 }
4279 else {
4280 max = 512;
4281 }
4282 if ((nnn > max ) || (nnn < 2))
4283 return -EINVAL;
4284 p_env->write_buffers = nnn;
4285 CLAW_DBF_TEXT(2,setup,"Wbufset");
4286 CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4287 return count;
4288}
4289
4290static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4291
4292static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4293claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4294{
4295 struct claw_privbk *priv;
4296 struct claw_env * p_env;
4297
4298 priv = dev->driver_data;
4299 if (!priv)
4300 return -ENODEV;
4301 p_env = priv->p_env;
4302 return sprintf(buf, "%d\n", p_env->read_buffers);
4303}
4304
4305static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4306claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4307{
4308 struct claw_privbk *priv;
4309 struct claw_env *p_env;
4310 int nnn,max;
4311
4312 priv = dev->driver_data;
4313 if (!priv)
4314 return -ENODEV;
4315 p_env = priv->p_env;
4316 sscanf(buf, "%i", &nnn);
4317 if (p_env->packing) {
4318 max = 64;
4319 }
4320 else {
4321 max = 512;
4322 }
4323 if ((nnn > max ) || (nnn < 2))
4324 return -EINVAL;
4325 p_env->read_buffers = nnn;
4326 CLAW_DBF_TEXT(2,setup,"Rbufset");
4327 CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4328 return count;
4329}
4330
4331static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4332
4333static struct attribute *claw_attr[] = {
4334 &dev_attr_read_buffer.attr,
4335 &dev_attr_write_buffer.attr,
4336 &dev_attr_adapter_name.attr,
4337 &dev_attr_api_type.attr,
4338 &dev_attr_host_name.attr,
4339 NULL,
4340};
4341
4342static struct attribute_group claw_attr_group = {
4343 .attrs = claw_attr,
4344};
4345
4346static int
4347claw_add_files(struct device *dev)
4348{
4349 pr_debug("%s() called\n", __FUNCTION__);
4350 CLAW_DBF_TEXT(2,setup,"add_file");
4351 return sysfs_create_group(&dev->kobj, &claw_attr_group);
4352}
4353
4354static void
4355claw_remove_files(struct device *dev)
4356{
4357 pr_debug("%s() called\n", __FUNCTION__);
4358 CLAW_DBF_TEXT(2,setup,"rem_file");
4359 sysfs_remove_group(&dev->kobj, &claw_attr_group);
4360}
4361
4362/*--------------------------------------------------------------------*
4363* claw_init and cleanup *
4364*---------------------------------------------------------------------*/
4365
4366static void __exit
4367claw_cleanup(void)
4368{
4369 unregister_cu3088_discipline(&claw_group_driver);
4370 claw_unregister_debug_facility();
4371 printk(KERN_INFO "claw: Driver unloaded\n");
4372
4373}
4374
4375/**
4376 * Initialize module.
4377 * This is called just after the module is loaded.
4378 *
4379 * @return 0 on success, !0 on error.
4380 */
4381static int __init
4382claw_init(void)
4383{
4384 int ret = 0;
Heiko Carstense018ba12006-02-01 03:06:31 -0800[diff] [blame]4385 printk(KERN_INFO "claw: starting driver\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4386
4387#ifdef FUNCTRACE
4388 printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4389#endif
4390 ret = claw_register_debug_facility();
4391 if (ret) {
4392 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4393 __FUNCTION__,ret);
4394 return ret;
4395 }
4396 CLAW_DBF_TEXT(2,setup,"init_mod");
4397 ret = register_cu3088_discipline(&claw_group_driver);
4398 if (ret) {
4399 claw_unregister_debug_facility();
4400 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4401 __FUNCTION__,ret);
4402 }
4403#ifdef FUNCTRACE
4404 printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4405#endif
4406 return ret;
4407}
4408
4409module_init(claw_init);
4410module_exit(claw_cleanup);
4411
4412
4413
4414/*--------------------------------------------------------------------*
4415* End of File *
4416*---------------------------------------------------------------------*/
4417
4418