Commit | Line | Data |
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6f05e69e | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
4b214a0c | 3 | * IBM/3270 Driver - fullscreen driver. |
1da177e4 | 4 | * |
4b214a0c MS |
5 | * Author(s): |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
9 | */ |
10 | ||
57c8a661 | 11 | #include <linux/memblock.h> |
1da177e4 LT |
12 | #include <linux/console.h> |
13 | #include <linux/init.h> | |
14 | #include <linux/interrupt.h> | |
048cd4e5 | 15 | #include <linux/compat.h> |
3f07c014 | 16 | #include <linux/sched/signal.h> |
3a4c5d59 | 17 | #include <linux/module.h> |
1da177e4 | 18 | #include <linux/list.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
1da177e4 LT |
20 | #include <linux/types.h> |
21 | ||
22 | #include <asm/ccwdev.h> | |
23 | #include <asm/cio.h> | |
1da177e4 LT |
24 | #include <asm/ebcdic.h> |
25 | #include <asm/idals.h> | |
26 | ||
27 | #include "raw3270.h" | |
28 | #include "ctrlchar.h" | |
29 | ||
2b67fc46 | 30 | static struct raw3270_fn fs3270_fn; |
1da177e4 LT |
31 | |
32 | struct fs3270 { | |
33 | struct raw3270_view view; | |
782237a2 | 34 | struct pid *fs_pid; /* Pid of controlling program. */ |
1da177e4 LT |
35 | int read_command; /* ccw command to use for reads. */ |
36 | int write_command; /* ccw command to use for writes. */ | |
37 | int attention; /* Got attention. */ | |
ed3cb6f0 RH |
38 | int active; /* Fullscreen view is active. */ |
39 | struct raw3270_request *init; /* single init request. */ | |
40 | wait_queue_head_t wait; /* Init & attention wait queue. */ | |
41 | struct idal_buffer *rdbuf; /* full-screen-deactivate buffer */ | |
42 | size_t rdbuf_size; /* size of data returned by RDBUF */ | |
1da177e4 LT |
43 | }; |
44 | ||
5cbb5f57 MS |
45 | static DEFINE_MUTEX(fs3270_mutex); |
46 | ||
1da177e4 LT |
47 | static void |
48 | fs3270_wake_up(struct raw3270_request *rq, void *data) | |
49 | { | |
a82603b0 | 50 | wake_up((wait_queue_head_t *)data); |
1da177e4 LT |
51 | } |
52 | ||
ed3cb6f0 RH |
53 | static inline int |
54 | fs3270_working(struct fs3270 *fp) | |
55 | { | |
56 | /* | |
57 | * The fullscreen view is in working order if the view | |
58 | * has been activated AND the initial request is finished. | |
59 | */ | |
60 | return fp->active && raw3270_request_final(fp->init); | |
61 | } | |
62 | ||
1da177e4 LT |
63 | static int |
64 | fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq) | |
65 | { | |
ed3cb6f0 | 66 | struct fs3270 *fp; |
1da177e4 LT |
67 | int rc; |
68 | ||
a82603b0 | 69 | fp = (struct fs3270 *)view; |
1da177e4 | 70 | rq->callback = fs3270_wake_up; |
ed3cb6f0 RH |
71 | rq->callback_data = &fp->wait; |
72 | ||
73 | do { | |
74 | if (!fs3270_working(fp)) { | |
75 | /* Fullscreen view isn't ready yet. */ | |
76 | rc = wait_event_interruptible(fp->wait, | |
77 | fs3270_working(fp)); | |
78 | if (rc != 0) | |
79 | break; | |
80 | } | |
81 | rc = raw3270_start(view, rq); | |
82 | if (rc == 0) { | |
af901ca1 | 83 | /* Started successfully. Now wait for completion. */ |
ed3cb6f0 RH |
84 | wait_event(fp->wait, raw3270_request_final(rq)); |
85 | } | |
86 | } while (rc == -EACCES); | |
87 | return rc; | |
1da177e4 LT |
88 | } |
89 | ||
ed3cb6f0 RH |
90 | /* |
91 | * Switch to the fullscreen view. | |
92 | */ | |
1da177e4 LT |
93 | static void |
94 | fs3270_reset_callback(struct raw3270_request *rq, void *data) | |
95 | { | |
ed3cb6f0 RH |
96 | struct fs3270 *fp; |
97 | ||
a82603b0 | 98 | fp = (struct fs3270 *)rq->view; |
1da177e4 | 99 | raw3270_request_reset(rq); |
ed3cb6f0 RH |
100 | wake_up(&fp->wait); |
101 | } | |
102 | ||
103 | static void | |
104 | fs3270_restore_callback(struct raw3270_request *rq, void *data) | |
105 | { | |
106 | struct fs3270 *fp; | |
107 | ||
a82603b0 | 108 | fp = (struct fs3270 *)rq->view; |
ed3cb6f0 RH |
109 | if (rq->rc != 0 || rq->rescnt != 0) { |
110 | if (fp->fs_pid) | |
782237a2 | 111 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
112 | } |
113 | fp->rdbuf_size = 0; | |
114 | raw3270_request_reset(rq); | |
115 | wake_up(&fp->wait); | |
1da177e4 LT |
116 | } |
117 | ||
1da177e4 LT |
118 | static int |
119 | fs3270_activate(struct raw3270_view *view) | |
120 | { | |
121 | struct fs3270 *fp; | |
ed3cb6f0 RH |
122 | char *cp; |
123 | int rc; | |
1da177e4 | 124 | |
a82603b0 | 125 | fp = (struct fs3270 *)view; |
ed3cb6f0 RH |
126 | |
127 | /* If an old init command is still running just return. */ | |
128 | if (!raw3270_request_final(fp->init)) | |
129 | return 0; | |
130 | ||
131 | if (fp->rdbuf_size == 0) { | |
132 | /* No saved buffer. Just clear the screen. */ | |
133 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
134 | fp->init->callback = fs3270_reset_callback; | |
135 | } else { | |
136 | /* Restore fullscreen buffer saved by fs3270_deactivate. */ | |
137 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
138 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
139 | fp->init->ccw.count = fp->rdbuf_size; | |
140 | cp = fp->rdbuf->data[0]; | |
141 | cp[0] = TW_KR; | |
142 | cp[1] = TO_SBA; | |
143 | cp[2] = cp[6]; | |
144 | cp[3] = cp[7]; | |
145 | cp[4] = TO_IC; | |
146 | cp[5] = TO_SBA; | |
147 | cp[6] = 0x40; | |
148 | cp[7] = 0x40; | |
149 | fp->init->rescnt = 0; | |
150 | fp->init->callback = fs3270_restore_callback; | |
151 | } | |
aa08b6a4 SS |
152 | rc = raw3270_start_locked(view, fp->init); |
153 | fp->init->rc = rc; | |
ed3cb6f0 RH |
154 | if (rc) |
155 | fp->init->callback(fp->init, NULL); | |
156 | else | |
157 | fp->active = 1; | |
158 | return rc; | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* | |
162 | * Shutdown fullscreen view. | |
163 | */ | |
ed3cb6f0 RH |
164 | static void |
165 | fs3270_save_callback(struct raw3270_request *rq, void *data) | |
166 | { | |
167 | struct fs3270 *fp; | |
168 | ||
a82603b0 | 169 | fp = (struct fs3270 *)rq->view; |
ed3cb6f0 RH |
170 | |
171 | /* Correct idal buffer element 0 address. */ | |
172 | fp->rdbuf->data[0] -= 5; | |
173 | fp->rdbuf->size += 5; | |
174 | ||
175 | /* | |
176 | * If the rdbuf command failed or the idal buffer is | |
177 | * to small for the amount of data returned by the | |
178 | * rdbuf command, then we have no choice but to send | |
179 | * a SIGHUP to the application. | |
180 | */ | |
181 | if (rq->rc != 0 || rq->rescnt == 0) { | |
182 | if (fp->fs_pid) | |
782237a2 | 183 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 | 184 | fp->rdbuf_size = 0; |
94577515 | 185 | } else { |
ed3cb6f0 | 186 | fp->rdbuf_size = fp->rdbuf->size - rq->rescnt; |
94577515 | 187 | } |
ed3cb6f0 RH |
188 | raw3270_request_reset(rq); |
189 | wake_up(&fp->wait); | |
190 | } | |
191 | ||
1da177e4 LT |
192 | static void |
193 | fs3270_deactivate(struct raw3270_view *view) | |
194 | { | |
1da177e4 LT |
195 | struct fs3270 *fp; |
196 | ||
a82603b0 | 197 | fp = (struct fs3270 *)view; |
ed3cb6f0 RH |
198 | fp->active = 0; |
199 | ||
200 | /* If an old init command is still running just return. */ | |
201 | if (!raw3270_request_final(fp->init)) | |
202 | return; | |
203 | ||
204 | /* Prepare read-buffer request. */ | |
205 | raw3270_request_set_cmd(fp->init, TC_RDBUF); | |
206 | /* | |
207 | * Hackish: skip first 5 bytes of the idal buffer to make | |
208 | * room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence | |
209 | * in the activation command. | |
210 | */ | |
211 | fp->rdbuf->data[0] += 5; | |
212 | fp->rdbuf->size -= 5; | |
213 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
214 | fp->init->rescnt = 0; | |
215 | fp->init->callback = fs3270_save_callback; | |
216 | ||
217 | /* Start I/O to read in the 3270 buffer. */ | |
218 | fp->init->rc = raw3270_start_locked(view, fp->init); | |
219 | if (fp->init->rc) | |
220 | fp->init->callback(fp->init, NULL); | |
1da177e4 LT |
221 | } |
222 | ||
8340ab60 | 223 | static void |
1da177e4 LT |
224 | fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb) |
225 | { | |
226 | /* Handle ATTN. Set indication and wake waiters for attention. */ | |
23d805b6 | 227 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 | 228 | fp->attention = 1; |
ed3cb6f0 | 229 | wake_up(&fp->wait); |
1da177e4 LT |
230 | } |
231 | ||
232 | if (rq) { | |
23d805b6 | 233 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
234 | rq->rc = -EIO; |
235 | else | |
236 | /* Normal end. Copy residual count. */ | |
23d805b6 | 237 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 | 238 | } |
1da177e4 LT |
239 | } |
240 | ||
241 | /* | |
242 | * Process reads from fullscreen 3270. | |
243 | */ | |
244 | static ssize_t | |
d2c993d8 | 245 | fs3270_read(struct file *filp, char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
246 | { |
247 | struct fs3270 *fp; | |
248 | struct raw3270_request *rq; | |
249 | struct idal_buffer *ib; | |
ed3cb6f0 | 250 | ssize_t rc; |
a82603b0 | 251 | |
1da177e4 LT |
252 | if (count == 0 || count > 65535) |
253 | return -EINVAL; | |
254 | fp = filp->private_data; | |
255 | if (!fp) | |
256 | return -ENODEV; | |
257 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 258 | if (IS_ERR(ib)) |
1da177e4 LT |
259 | return -ENOMEM; |
260 | rq = raw3270_request_alloc(0); | |
261 | if (!IS_ERR(rq)) { | |
262 | if (fp->read_command == 0 && fp->write_command != 0) | |
263 | fp->read_command = 6; | |
264 | raw3270_request_set_cmd(rq, fp->read_command ? : 2); | |
265 | raw3270_request_set_idal(rq, ib); | |
ed3cb6f0 RH |
266 | rc = wait_event_interruptible(fp->wait, fp->attention); |
267 | fp->attention = 0; | |
268 | if (rc == 0) { | |
269 | rc = fs3270_do_io(&fp->view, rq); | |
270 | if (rc == 0) { | |
271 | count -= rq->rescnt; | |
272 | if (idal_buffer_to_user(ib, data, count) != 0) | |
273 | rc = -EFAULT; | |
274 | else | |
275 | rc = count; | |
ed3cb6f0 RH |
276 | } |
277 | } | |
1da177e4 | 278 | raw3270_request_free(rq); |
94577515 | 279 | } else { |
1da177e4 | 280 | rc = PTR_ERR(rq); |
94577515 | 281 | } |
1da177e4 LT |
282 | idal_buffer_free(ib); |
283 | return rc; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Process writes to fullscreen 3270. | |
288 | */ | |
289 | static ssize_t | |
d2c993d8 | 290 | fs3270_write(struct file *filp, const char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
291 | { |
292 | struct fs3270 *fp; | |
293 | struct raw3270_request *rq; | |
294 | struct idal_buffer *ib; | |
295 | int write_command; | |
ed3cb6f0 | 296 | ssize_t rc; |
1da177e4 LT |
297 | |
298 | fp = filp->private_data; | |
299 | if (!fp) | |
300 | return -ENODEV; | |
301 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 302 | if (IS_ERR(ib)) |
1da177e4 LT |
303 | return -ENOMEM; |
304 | rq = raw3270_request_alloc(0); | |
305 | if (!IS_ERR(rq)) { | |
306 | if (idal_buffer_from_user(ib, data, count) == 0) { | |
307 | write_command = fp->write_command ? : 1; | |
308 | if (write_command == 5) | |
309 | write_command = 13; | |
310 | raw3270_request_set_cmd(rq, write_command); | |
311 | raw3270_request_set_idal(rq, ib); | |
312 | rc = fs3270_do_io(&fp->view, rq); | |
ed3cb6f0 RH |
313 | if (rc == 0) |
314 | rc = count - rq->rescnt; | |
94577515 | 315 | } else { |
1da177e4 | 316 | rc = -EFAULT; |
94577515 | 317 | } |
1da177e4 | 318 | raw3270_request_free(rq); |
94577515 | 319 | } else { |
1da177e4 | 320 | rc = PTR_ERR(rq); |
94577515 | 321 | } |
1da177e4 LT |
322 | idal_buffer_free(ib); |
323 | return rc; | |
324 | } | |
325 | ||
326 | /* | |
327 | * process ioctl commands for the tube driver | |
328 | */ | |
0f75e00c CH |
329 | static long |
330 | fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 331 | { |
16e1a577 | 332 | char __user *argp; |
1da177e4 LT |
333 | struct fs3270 *fp; |
334 | struct raw3270_iocb iocb; | |
335 | int rc; | |
336 | ||
337 | fp = filp->private_data; | |
338 | if (!fp) | |
339 | return -ENODEV; | |
16e1a577 HC |
340 | if (is_compat_task()) |
341 | argp = compat_ptr(arg); | |
342 | else | |
343 | argp = (char __user *)arg; | |
1da177e4 | 344 | rc = 0; |
5cbb5f57 | 345 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
346 | switch (cmd) { |
347 | case TUBICMD: | |
348 | fp->read_command = arg; | |
349 | break; | |
350 | case TUBOCMD: | |
351 | fp->write_command = arg; | |
352 | break; | |
353 | case TUBGETI: | |
16e1a577 | 354 | rc = put_user(fp->read_command, argp); |
1da177e4 LT |
355 | break; |
356 | case TUBGETO: | |
16e1a577 | 357 | rc = put_user(fp->write_command, argp); |
1da177e4 LT |
358 | break; |
359 | case TUBGETMOD: | |
360 | iocb.model = fp->view.model; | |
361 | iocb.line_cnt = fp->view.rows; | |
362 | iocb.col_cnt = fp->view.cols; | |
363 | iocb.pf_cnt = 24; | |
364 | iocb.re_cnt = 20; | |
365 | iocb.map = 0; | |
16e1a577 | 366 | if (copy_to_user(argp, &iocb, sizeof(struct raw3270_iocb))) |
1da177e4 LT |
367 | rc = -EFAULT; |
368 | break; | |
369 | } | |
5cbb5f57 | 370 | mutex_unlock(&fs3270_mutex); |
1da177e4 LT |
371 | return rc; |
372 | } | |
373 | ||
374 | /* | |
ed3cb6f0 | 375 | * Allocate fs3270 structure. |
1da177e4 LT |
376 | */ |
377 | static struct fs3270 * | |
378 | fs3270_alloc_view(void) | |
379 | { | |
380 | struct fs3270 *fp; | |
381 | ||
a82603b0 | 382 | fp = kzalloc(sizeof(struct fs3270), GFP_KERNEL); |
1da177e4 LT |
383 | if (!fp) |
384 | return ERR_PTR(-ENOMEM); | |
ed3cb6f0 RH |
385 | fp->init = raw3270_request_alloc(0); |
386 | if (IS_ERR(fp->init)) { | |
1da177e4 LT |
387 | kfree(fp); |
388 | return ERR_PTR(-ENOMEM); | |
389 | } | |
390 | return fp; | |
391 | } | |
392 | ||
393 | /* | |
ed3cb6f0 | 394 | * Free fs3270 structure. |
1da177e4 LT |
395 | */ |
396 | static void | |
397 | fs3270_free_view(struct raw3270_view *view) | |
398 | { | |
ed3cb6f0 RH |
399 | struct fs3270 *fp; |
400 | ||
a82603b0 | 401 | fp = (struct fs3270 *)view; |
ed3cb6f0 RH |
402 | if (fp->rdbuf) |
403 | idal_buffer_free(fp->rdbuf); | |
a82603b0 | 404 | raw3270_request_free(((struct fs3270 *)view)->init); |
1da177e4 LT |
405 | kfree(view); |
406 | } | |
407 | ||
408 | /* | |
409 | * Unlink fs3270 data structure from filp. | |
410 | */ | |
411 | static void | |
412 | fs3270_release(struct raw3270_view *view) | |
413 | { | |
4b214a0c MS |
414 | struct fs3270 *fp; |
415 | ||
a82603b0 | 416 | fp = (struct fs3270 *)view; |
4b214a0c MS |
417 | if (fp->fs_pid) |
418 | kill_pid(fp->fs_pid, SIGHUP, 1); | |
1da177e4 LT |
419 | } |
420 | ||
421 | /* View to a 3270 device. Can be console, tty or fullscreen. */ | |
2b67fc46 | 422 | static struct raw3270_fn fs3270_fn = { |
1da177e4 LT |
423 | .activate = fs3270_activate, |
424 | .deactivate = fs3270_deactivate, | |
a82603b0 | 425 | .intv = (void *)fs3270_irq, |
1da177e4 LT |
426 | .release = fs3270_release, |
427 | .free = fs3270_free_view | |
428 | }; | |
429 | ||
430 | /* | |
431 | * This routine is called whenever a 3270 fullscreen device is opened. | |
432 | */ | |
433 | static int | |
434 | fs3270_open(struct inode *inode, struct file *filp) | |
435 | { | |
436 | struct fs3270 *fp; | |
ed3cb6f0 | 437 | struct idal_buffer *ib; |
a18992d4 | 438 | int minor, rc = 0; |
1da177e4 | 439 | |
496ad9aa | 440 | if (imajor(file_inode(filp)) != IBM_FS3270_MAJOR) |
1da177e4 | 441 | return -ENODEV; |
496ad9aa | 442 | minor = iminor(file_inode(filp)); |
ed3cb6f0 RH |
443 | /* Check for minor 0 multiplexer. */ |
444 | if (minor == 0) { | |
a90610e5 | 445 | struct tty_struct *tty = get_current_tty(); |
a82603b0 | 446 | |
24ec839c | 447 | if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) { |
452a00d2 | 448 | tty_kref_put(tty); |
a18992d4 | 449 | return -ENODEV; |
24ec839c | 450 | } |
c95571e6 | 451 | minor = tty->index; |
452a00d2 | 452 | tty_kref_put(tty); |
ed3cb6f0 | 453 | } |
5cbb5f57 | 454 | mutex_lock(&fs3270_mutex); |
1da177e4 | 455 | /* Check if some other program is already using fullscreen mode. */ |
a82603b0 | 456 | fp = (struct fs3270 *)raw3270_find_view(&fs3270_fn, minor); |
1da177e4 LT |
457 | if (!IS_ERR(fp)) { |
458 | raw3270_put_view(&fp->view); | |
764a4a8e JC |
459 | rc = -EBUSY; |
460 | goto out; | |
1da177e4 LT |
461 | } |
462 | /* Allocate fullscreen view structure. */ | |
463 | fp = fs3270_alloc_view(); | |
764a4a8e JC |
464 | if (IS_ERR(fp)) { |
465 | rc = PTR_ERR(fp); | |
466 | goto out; | |
467 | } | |
1da177e4 | 468 | |
ed3cb6f0 | 469 | init_waitqueue_head(&fp->wait); |
782237a2 | 470 | fp->fs_pid = get_pid(task_pid(current)); |
5712f330 MS |
471 | rc = raw3270_add_view(&fp->view, &fs3270_fn, minor, |
472 | RAW3270_VIEW_LOCK_BH); | |
1da177e4 LT |
473 | if (rc) { |
474 | fs3270_free_view(&fp->view); | |
764a4a8e | 475 | goto out; |
1da177e4 LT |
476 | } |
477 | ||
ed3cb6f0 | 478 | /* Allocate idal-buffer. */ |
a82603b0 | 479 | ib = idal_buffer_alloc(2 * fp->view.rows * fp->view.cols + 5, 0); |
ed3cb6f0 RH |
480 | if (IS_ERR(ib)) { |
481 | raw3270_put_view(&fp->view); | |
482 | raw3270_del_view(&fp->view); | |
2b31001d | 483 | rc = PTR_ERR(ib); |
764a4a8e | 484 | goto out; |
ed3cb6f0 RH |
485 | } |
486 | fp->rdbuf = ib; | |
487 | ||
1da177e4 LT |
488 | rc = raw3270_activate_view(&fp->view); |
489 | if (rc) { | |
ed3cb6f0 | 490 | raw3270_put_view(&fp->view); |
1da177e4 | 491 | raw3270_del_view(&fp->view); |
764a4a8e | 492 | goto out; |
1da177e4 | 493 | } |
c5bf68fe | 494 | stream_open(inode, filp); |
1da177e4 | 495 | filp->private_data = fp; |
764a4a8e | 496 | out: |
5cbb5f57 | 497 | mutex_unlock(&fs3270_mutex); |
a18992d4 | 498 | return rc; |
1da177e4 LT |
499 | } |
500 | ||
501 | /* | |
502 | * This routine is called when the 3270 tty is closed. We wait | |
503 | * for the remaining request to be completed. Then we clean up. | |
504 | */ | |
505 | static int | |
506 | fs3270_close(struct inode *inode, struct file *filp) | |
507 | { | |
508 | struct fs3270 *fp; | |
509 | ||
510 | fp = filp->private_data; | |
d2c993d8 | 511 | filp->private_data = NULL; |
ed3cb6f0 | 512 | if (fp) { |
782237a2 CLG |
513 | put_pid(fp->fs_pid); |
514 | fp->fs_pid = NULL; | |
ed3cb6f0 RH |
515 | raw3270_reset(&fp->view); |
516 | raw3270_put_view(&fp->view); | |
1da177e4 | 517 | raw3270_del_view(&fp->view); |
ed3cb6f0 | 518 | } |
1da177e4 LT |
519 | return 0; |
520 | } | |
521 | ||
d54b1fdb | 522 | static const struct file_operations fs3270_fops = { |
0f75e00c CH |
523 | .owner = THIS_MODULE, /* owner */ |
524 | .read = fs3270_read, /* read */ | |
525 | .write = fs3270_write, /* write */ | |
526 | .unlocked_ioctl = fs3270_ioctl, /* ioctl */ | |
527 | .compat_ioctl = fs3270_ioctl, /* ioctl */ | |
16e1a577 HC |
528 | .open = fs3270_open, /* open */ |
529 | .release = fs3270_close, /* release */ | |
6038f373 | 530 | .llseek = no_llseek, |
1da177e4 LT |
531 | }; |
532 | ||
63df41d6 | 533 | static void fs3270_create_cb(int minor) |
c95571e6 MS |
534 | { |
535 | __register_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub", &fs3270_fops); | |
536 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, minor), | |
537 | NULL, "3270/tub%d", minor); | |
538 | } | |
539 | ||
63df41d6 | 540 | static void fs3270_destroy_cb(int minor) |
c95571e6 MS |
541 | { |
542 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, minor)); | |
543 | __unregister_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub"); | |
544 | } | |
545 | ||
94577515 | 546 | static struct raw3270_notifier fs3270_notifier = { |
c95571e6 MS |
547 | .create = fs3270_create_cb, |
548 | .destroy = fs3270_destroy_cb, | |
549 | }; | |
550 | ||
1da177e4 LT |
551 | /* |
552 | * 3270 fullscreen driver initialization. | |
553 | */ | |
554 | static int __init | |
555 | fs3270_init(void) | |
556 | { | |
557 | int rc; | |
558 | ||
c95571e6 | 559 | rc = __register_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270", &fs3270_fops); |
a26182ed | 560 | if (rc) |
1da177e4 | 561 | return rc; |
c95571e6 MS |
562 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, 0), |
563 | NULL, "3270/tub"); | |
564 | raw3270_register_notifier(&fs3270_notifier); | |
1da177e4 LT |
565 | return 0; |
566 | } | |
567 | ||
568 | static void __exit | |
569 | fs3270_exit(void) | |
570 | { | |
c95571e6 | 571 | raw3270_unregister_notifier(&fs3270_notifier); |
d1e61fe4 | 572 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, 0)); |
c95571e6 | 573 | __unregister_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270"); |
1da177e4 LT |
574 | } |
575 | ||
576 | MODULE_LICENSE("GPL"); | |
577 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_FS3270_MAJOR); | |
578 | ||
579 | module_init(fs3270_init); | |
580 | module_exit(fs3270_exit); |