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13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/sched.h>
17#include <linux/poll.h>
18#include <linux/proc_fs.h>
19#include <linux/skbuff.h>
20#include <linux/seq_file.h>
21#include <asm/uaccess.h>
22
23#include "platform.h"
24#include "di_defs.h"
25#include "divasync.h"
26#include "um_xdi.h"
27#include "um_idi.h"
28
29static char *main_revision = "$Revision: 1.25.6.2 $";
30
31static int major;
32
33MODULE_DESCRIPTION("User IDI Interface for Eicon ISDN cards");
34MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
35MODULE_SUPPORTED_DEVICE("DIVA card driver");
36MODULE_LICENSE("GPL");
37
38typedef struct _diva_um_idi_os_context {
39 wait_queue_head_t read_wait;
40 wait_queue_head_t close_wait;
41 struct timer_list diva_timer_id;
42 int aborted;
43 int adapter_nr;
44} diva_um_idi_os_context_t;
45
46static char *DRIVERNAME = "Eicon DIVA - User IDI (http://www.melware.net)";
47static char *DRIVERLNAME = "diva_idi";
48static char *DEVNAME = "DivasIDI";
49char *DRIVERRELEASE_IDI = "2.0";
50
51extern int idifunc_init(void);
52extern void idifunc_finit(void);
53
54
55
56
57static char *getrev(const char *revision)
58{
59 char *rev;
60 char *p;
61 if ((p = strchr(revision, ':'))) {
62 rev = p + 2;
63 p = strchr(rev, '$');
64 *--p = 0;
65 } else
66 rev = "1.0";
67 return rev;
68}
69
70
71
72
73static ssize_t um_idi_read(struct file *file, char __user *buf, size_t count,
74 loff_t *offset);
75static ssize_t um_idi_write(struct file *file, const char __user *buf,
76 size_t count, loff_t *offset);
77static unsigned int um_idi_poll(struct file *file, poll_table *wait);
78static int um_idi_open(struct inode *inode, struct file *file);
79static int um_idi_release(struct inode *inode, struct file *file);
80static int remove_entity(void *entity);
81static void diva_um_timer_function(unsigned long data);
82
83
84
85
86extern struct proc_dir_entry *proc_net_eicon;
87static struct proc_dir_entry *um_idi_proc_entry = NULL;
88
89static int um_idi_proc_show(struct seq_file *m, void *v)
90{
91 char tmprev[32];
92
93 seq_printf(m, "%s\n", DRIVERNAME);
94 seq_printf(m, "name : %s\n", DRIVERLNAME);
95 seq_printf(m, "release : %s\n", DRIVERRELEASE_IDI);
96 strcpy(tmprev, main_revision);
97 seq_printf(m, "revision : %s\n", getrev(tmprev));
98 seq_printf(m, "build : %s\n", DIVA_BUILD);
99 seq_printf(m, "major : %d\n", major);
100
101 return 0;
102}
103
104static int um_idi_proc_open(struct inode *inode, struct file *file)
105{
106 return single_open(file, um_idi_proc_show, NULL);
107}
108
109static const struct file_operations um_idi_proc_fops = {
110 .owner = THIS_MODULE,
111 .open = um_idi_proc_open,
112 .read = seq_read,
113 .llseek = seq_lseek,
114 .release = single_release,
115};
116
117static int __init create_um_idi_proc(void)
118{
119 um_idi_proc_entry = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
120 &um_idi_proc_fops);
121 if (!um_idi_proc_entry)
122 return (0);
123 return (1);
124}
125
126static void remove_um_idi_proc(void)
127{
128 if (um_idi_proc_entry) {
129 remove_proc_entry(DRIVERLNAME, proc_net_eicon);
130 um_idi_proc_entry = NULL;
131 }
132}
133
134static const struct file_operations divas_idi_fops = {
135 .owner = THIS_MODULE,
136 .llseek = no_llseek,
137 .read = um_idi_read,
138 .write = um_idi_write,
139 .poll = um_idi_poll,
140 .open = um_idi_open,
141 .release = um_idi_release
142};
143
144static void divas_idi_unregister_chrdev(void)
145{
146 unregister_chrdev(major, DEVNAME);
147}
148
149static int __init divas_idi_register_chrdev(void)
150{
151 if ((major = register_chrdev(0, DEVNAME, &divas_idi_fops)) < 0)
152 {
153 printk(KERN_ERR "%s: failed to create /dev entry.\n",
154 DRIVERLNAME);
155 return (0);
156 }
157
158 return (1);
159}
160
161
162
163
164static int __init divasi_init(void)
165{
166 char tmprev[50];
167 int ret = 0;
168
169 printk(KERN_INFO "%s\n", DRIVERNAME);
170 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_IDI);
171 strcpy(tmprev, main_revision);
172 printk("%s Build: %s\n", getrev(tmprev), DIVA_BUILD);
173
174 if (!divas_idi_register_chrdev()) {
175 ret = -EIO;
176 goto out;
177 }
178
179 if (!create_um_idi_proc()) {
180 divas_idi_unregister_chrdev();
181 printk(KERN_ERR "%s: failed to create proc entry.\n",
182 DRIVERLNAME);
183 ret = -EIO;
184 goto out;
185 }
186
187 if (!(idifunc_init())) {
188 remove_um_idi_proc();
189 divas_idi_unregister_chrdev();
190 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
191 DRIVERLNAME);
192 ret = -EIO;
193 goto out;
194 }
195 printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
196
197out:
198 return (ret);
199}
200
201
202
203
204
205static void __exit divasi_exit(void)
206{
207 idifunc_finit();
208 remove_um_idi_proc();
209 divas_idi_unregister_chrdev();
210
211 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
212}
213
214module_init(divasi_init);
215module_exit(divasi_exit);
216
217
218
219
220
221
222static int
223divas_um_idi_copy_to_user(void *os_handle, void *dst, const void *src,
224 int length)
225{
226 memcpy(dst, src, length);
227 return (length);
228}
229
230static ssize_t
231um_idi_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
232{
233 diva_um_idi_os_context_t *p_os;
234 int ret = -EINVAL;
235 void *data;
236
237 if (!file->private_data) {
238 return (-ENODEV);
239 }
240
241 if (!
242 (p_os =
243 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
244 private_data)))
245 {
246 return (-ENODEV);
247 }
248 if (p_os->aborted) {
249 return (-ENODEV);
250 }
251
252 if (!(data = diva_os_malloc(0, count))) {
253 return (-ENOMEM);
254 }
255
256 ret = diva_um_idi_read(file->private_data,
257 file, data, count,
258 divas_um_idi_copy_to_user);
259 switch (ret) {
260 case 0:
261 ret = (-EAGAIN);
262 break;
263 case (-1):
264 ret = (-ENODEV);
265 break;
266 case (-2):
267 ret = (-EFAULT);
268 break;
269 }
270
271 if (ret > 0) {
272 if (copy_to_user(buf, data, ret)) {
273 ret = (-EFAULT);
274 }
275 }
276
277 diva_os_free(0, data);
278 DBG_TRC(("read: ret %d", ret));
279 return (ret);
280}
281
282
283static int
284divas_um_idi_copy_from_user(void *os_handle, void *dst, const void *src,
285 int length)
286{
287 memcpy(dst, src, length);
288 return (length);
289}
290
291static int um_idi_open_adapter(struct file *file, int adapter_nr)
292{
293 diva_um_idi_os_context_t *p_os;
294 void *e =
295 divas_um_idi_create_entity((dword) adapter_nr, (void *) file);
296
297 if (!(file->private_data = e)) {
298 return (0);
299 }
300 p_os = (diva_um_idi_os_context_t *) diva_um_id_get_os_context(e);
301 init_waitqueue_head(&p_os->read_wait);
302 init_waitqueue_head(&p_os->close_wait);
303 init_timer(&p_os->diva_timer_id);
304 p_os->diva_timer_id.function = (void *) diva_um_timer_function;
305 p_os->diva_timer_id.data = (unsigned long) p_os;
306 p_os->aborted = 0;
307 p_os->adapter_nr = adapter_nr;
308 return (1);
309}
310
311static ssize_t
312um_idi_write(struct file *file, const char __user *buf, size_t count,
313 loff_t *offset)
314{
315 diva_um_idi_os_context_t *p_os;
316 int ret = -EINVAL;
317 void *data;
318 int adapter_nr = 0;
319
320 if (!file->private_data) {
321
322 if (count == sizeof(int)) {
323 if (copy_from_user
324 ((void *) &adapter_nr, buf,
325 count)) return (-EFAULT);
326 if (!(um_idi_open_adapter(file, adapter_nr)))
327 return (-ENODEV);
328 return (count);
329 } else
330 return (-ENODEV);
331 }
332
333 if (!(p_os =
334 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
335 private_data)))
336 {
337 return (-ENODEV);
338 }
339 if (p_os->aborted) {
340 return (-ENODEV);
341 }
342
343 if (!(data = diva_os_malloc(0, count))) {
344 return (-ENOMEM);
345 }
346
347 if (copy_from_user(data, buf, count)) {
348 ret = -EFAULT;
349 } else {
350 ret = diva_um_idi_write(file->private_data,
351 file, data, count,
352 divas_um_idi_copy_from_user);
353 switch (ret) {
354 case 0:
355 ret = (-EAGAIN);
356 break;
357 case (-1):
358 ret = (-ENODEV);
359 break;
360 case (-2):
361 ret = (-EFAULT);
362 break;
363 }
364 }
365 diva_os_free(0, data);
366 DBG_TRC(("write: ret %d", ret));
367 return (ret);
368}
369
370static unsigned int um_idi_poll(struct file *file, poll_table *wait)
371{
372 diva_um_idi_os_context_t *p_os;
373
374 if (!file->private_data) {
375 return (POLLERR);
376 }
377
378 if ((!(p_os =
379 (diva_um_idi_os_context_t *)
380 diva_um_id_get_os_context(file->private_data)))
381 || p_os->aborted) {
382 return (POLLERR);
383 }
384
385 poll_wait(file, &p_os->read_wait, wait);
386
387 if (p_os->aborted) {
388 return (POLLERR);
389 }
390
391 switch (diva_user_mode_idi_ind_ready(file->private_data, file)) {
392 case (-1):
393 return (POLLERR);
394
395 case 0:
396 return (0);
397 }
398
399 return (POLLIN | POLLRDNORM);
400}
401
402static int um_idi_open(struct inode *inode, struct file *file)
403{
404 return (0);
405}
406
407
408static int um_idi_release(struct inode *inode, struct file *file)
409{
410 diva_um_idi_os_context_t *p_os;
411 unsigned int adapter_nr;
412 int ret = 0;
413
414 if (!(file->private_data)) {
415 ret = -ENODEV;
416 goto out;
417 }
418
419 if (!(p_os =
420 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) {
421 ret = -ENODEV;
422 goto out;
423 }
424
425 adapter_nr = p_os->adapter_nr;
426
427 if ((ret = remove_entity(file->private_data))) {
428 goto out;
429 }
430
431 if (divas_um_idi_delete_entity
432 ((int) adapter_nr, file->private_data)) {
433 ret = -ENODEV;
434 goto out;
435 }
436
437out:
438 return (ret);
439}
440
441int diva_os_get_context_size(void)
442{
443 return (sizeof(diva_um_idi_os_context_t));
444}
445
446void diva_os_wakeup_read(void *os_context)
447{
448 diva_um_idi_os_context_t *p_os =
449 (diva_um_idi_os_context_t *) os_context;
450 wake_up_interruptible(&p_os->read_wait);
451}
452
453void diva_os_wakeup_close(void *os_context)
454{
455 diva_um_idi_os_context_t *p_os =
456 (diva_um_idi_os_context_t *) os_context;
457 wake_up_interruptible(&p_os->close_wait);
458}
459
460static
461void diva_um_timer_function(unsigned long data)
462{
463 diva_um_idi_os_context_t *p_os = (diva_um_idi_os_context_t *) data;
464
465 p_os->aborted = 1;
466 wake_up_interruptible(&p_os->read_wait);
467 wake_up_interruptible(&p_os->close_wait);
468 DBG_ERR(("entity removal watchdog"))
469 }
470
471
472
473
474
475static int remove_entity(void *entity)
476{
477 struct task_struct *curtask = current;
478 diva_um_idi_os_context_t *p_os;
479
480 diva_um_idi_stop_wdog(entity);
481
482 if (!entity) {
483 DBG_FTL(("Zero entity on remove"))
484 return (0);
485 }
486
487 if (!(p_os =
488 (diva_um_idi_os_context_t *)
489 diva_um_id_get_os_context(entity))) {
490 DBG_FTL(("Zero entity os context on remove"))
491 return (0);
492 }
493
494 if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) {
495
496
497
498 return (0);
499 }
500
501 DBG_TRC(("E(%08x) check remove", entity))
502
503
504
505
506
507 diva_um_idi_start_wdog(entity);
508
509 {
510 DECLARE_WAITQUEUE(wait, curtask);
511
512 add_wait_queue(&p_os->close_wait, &wait);
513 for (;;) {
514 set_current_state(TASK_INTERRUPTIBLE);
515 if (!divas_um_idi_entity_start_remove(entity)
516 || p_os->aborted) {
517 break;
518 }
519 schedule();
520 }
521 set_current_state(TASK_RUNNING);
522 remove_wait_queue(&p_os->close_wait, &wait);
523 }
524
525 DBG_TRC(("E(%08x) start remove", entity))
526 {
527 DECLARE_WAITQUEUE(wait, curtask);
528
529 add_wait_queue(&p_os->close_wait, &wait);
530 for (;;) {
531 set_current_state(TASK_INTERRUPTIBLE);
532 if (!divas_um_idi_entity_assigned(entity)
533 || p_os->aborted) {
534 break;
535 }
536 schedule();
537 }
538 set_current_state(TASK_RUNNING);
539 remove_wait_queue(&p_os->close_wait, &wait);
540 }
541
542 DBG_TRC(("E(%08x) remove complete, aborted:%d", entity,
543 p_os->aborted))
544
545 diva_um_idi_stop_wdog(entity);
546
547 p_os->aborted = 0;
548
549 return (0);
550}
551
552
553
554
555void diva_um_idi_start_wdog(void *entity)
556{
557 diva_um_idi_os_context_t *p_os;
558
559 if (entity &&
560 ((p_os =
561 (diva_um_idi_os_context_t *)
562 diva_um_id_get_os_context(entity)))) {
563 mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ);
564 }
565}
566
567void diva_um_idi_stop_wdog(void *entity)
568{
569 diva_um_idi_os_context_t *p_os;
570
571 if (entity &&
572 ((p_os =
573 (diva_um_idi_os_context_t *)
574 diva_um_id_get_os_context(entity)))) {
575 del_timer(&p_os->diva_timer_id);
576 }
577}
578
