Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4b214a0c | 2 | * IBM/3270 Driver - core functions. |
1da177e4 | 3 | * |
4b214a0c MS |
4 | * Author(s): |
5 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
6 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
7 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
8 | */ |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/err.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/wait.h> | |
18 | ||
19 | #include <asm/ccwdev.h> | |
20 | #include <asm/cio.h> | |
21 | #include <asm/ebcdic.h> | |
0a87c5cf | 22 | #include <asm/diag.h> |
1da177e4 LT |
23 | |
24 | #include "raw3270.h" | |
25 | ||
ed3cb6f0 RH |
26 | #include <linux/major.h> |
27 | #include <linux/kdev_t.h> | |
28 | #include <linux/device.h> | |
14cc3e2b | 29 | #include <linux/mutex.h> |
ed3cb6f0 | 30 | |
2b67fc46 | 31 | static struct class *class3270; |
ed3cb6f0 | 32 | |
1da177e4 LT |
33 | /* The main 3270 data structure. */ |
34 | struct raw3270 { | |
35 | struct list_head list; | |
36 | struct ccw_device *cdev; | |
37 | int minor; | |
38 | ||
39 | short model, rows, cols; | |
40 | unsigned long flags; | |
41 | ||
42 | struct list_head req_queue; /* Request queue. */ | |
43 | struct list_head view_list; /* List of available views. */ | |
44 | struct raw3270_view *view; /* Active view. */ | |
45 | ||
46 | struct timer_list timer; /* Device timer. */ | |
47 | ||
48 | unsigned char *ascebc; /* ascii -> ebcdic table */ | |
7f021ce1 CH |
49 | struct device *clttydev; /* 3270-class tty device ptr */ |
50 | struct device *cltubdev; /* 3270-class tub device ptr */ | |
132fab13 MS |
51 | |
52 | struct raw3270_request init_request; | |
53 | unsigned char init_data[256]; | |
1da177e4 LT |
54 | }; |
55 | ||
56 | /* raw3270->flags */ | |
57 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ | |
58 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ | |
59 | #define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */ | |
60 | #define RAW3270_FLAGS_READY 4 /* Device is useable by views */ | |
61 | #define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */ | |
4b214a0c | 62 | #define RAW3270_FLAGS_FROZEN 16 /* set if 3270 is frozen for suspend */ |
1da177e4 LT |
63 | |
64 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ | |
14cc3e2b | 65 | static DEFINE_MUTEX(raw3270_mutex); |
1da177e4 LT |
66 | |
67 | /* List of 3270 devices. */ | |
c11ca97e | 68 | static LIST_HEAD(raw3270_devices); |
1da177e4 LT |
69 | |
70 | /* | |
71 | * Flag to indicate if the driver has been registered. Some operations | |
72 | * like waiting for the end of i/o need to be done differently as long | |
73 | * as the kernel is still starting up (console support). | |
74 | */ | |
75 | static int raw3270_registered; | |
76 | ||
77 | /* Module parameters */ | |
78 | static int tubxcorrect = 0; | |
79 | module_param(tubxcorrect, bool, 0); | |
80 | ||
81 | /* | |
82 | * Wait queue for device init/delete, view delete. | |
83 | */ | |
84 | DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); | |
85 | ||
86 | /* | |
87 | * Encode array for 12 bit 3270 addresses. | |
88 | */ | |
2b67fc46 | 89 | static unsigned char raw3270_ebcgraf[64] = { |
1da177e4 LT |
90 | 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, |
91 | 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
92 | 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
93 | 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, | |
94 | 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
95 | 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
96 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
97 | 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f | |
98 | }; | |
99 | ||
100 | void | |
101 | raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) | |
102 | { | |
103 | if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { | |
104 | cp[0] = (addr >> 8) & 0x3f; | |
105 | cp[1] = addr & 0xff; | |
106 | } else { | |
107 | cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; | |
108 | cp[1] = raw3270_ebcgraf[addr & 0x3f]; | |
109 | } | |
110 | } | |
111 | ||
112 | /* | |
113 | * Allocate a new 3270 ccw request | |
114 | */ | |
115 | struct raw3270_request * | |
116 | raw3270_request_alloc(size_t size) | |
117 | { | |
118 | struct raw3270_request *rq; | |
119 | ||
120 | /* Allocate request structure */ | |
88abaab4 | 121 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
122 | if (!rq) |
123 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
124 | |
125 | /* alloc output buffer. */ | |
126 | if (size > 0) { | |
127 | rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
128 | if (!rq->buffer) { | |
129 | kfree(rq); | |
130 | return ERR_PTR(-ENOMEM); | |
131 | } | |
132 | } | |
133 | rq->size = size; | |
134 | INIT_LIST_HEAD(&rq->list); | |
135 | ||
136 | /* | |
137 | * Setup ccw. | |
138 | */ | |
139 | rq->ccw.cda = __pa(rq->buffer); | |
140 | rq->ccw.flags = CCW_FLAG_SLI; | |
141 | ||
142 | return rq; | |
143 | } | |
144 | ||
1da177e4 LT |
145 | /* |
146 | * Free 3270 ccw request | |
147 | */ | |
148 | void | |
149 | raw3270_request_free (struct raw3270_request *rq) | |
150 | { | |
17fd682e | 151 | kfree(rq->buffer); |
1da177e4 LT |
152 | kfree(rq); |
153 | } | |
154 | ||
155 | /* | |
156 | * Reset request to initial state. | |
157 | */ | |
158 | void | |
159 | raw3270_request_reset(struct raw3270_request *rq) | |
160 | { | |
161 | BUG_ON(!list_empty(&rq->list)); | |
162 | rq->ccw.cmd_code = 0; | |
163 | rq->ccw.count = 0; | |
164 | rq->ccw.cda = __pa(rq->buffer); | |
165 | rq->ccw.flags = CCW_FLAG_SLI; | |
166 | rq->rescnt = 0; | |
167 | rq->rc = 0; | |
168 | } | |
169 | ||
170 | /* | |
171 | * Set command code to ccw of a request. | |
172 | */ | |
173 | void | |
174 | raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) | |
175 | { | |
176 | rq->ccw.cmd_code = cmd; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Add data fragment to output buffer. | |
181 | */ | |
182 | int | |
183 | raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) | |
184 | { | |
185 | if (size + rq->ccw.count > rq->size) | |
186 | return -E2BIG; | |
187 | memcpy(rq->buffer + rq->ccw.count, data, size); | |
188 | rq->ccw.count += size; | |
189 | return 0; | |
190 | } | |
191 | ||
192 | /* | |
193 | * Set address/length pair to ccw of a request. | |
194 | */ | |
195 | void | |
196 | raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) | |
197 | { | |
198 | rq->ccw.cda = __pa(data); | |
199 | rq->ccw.count = size; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Set idal buffer to ccw of a request. | |
204 | */ | |
205 | void | |
206 | raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) | |
207 | { | |
208 | rq->ccw.cda = __pa(ib->data); | |
209 | rq->ccw.count = ib->size; | |
210 | rq->ccw.flags |= CCW_FLAG_IDA; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Stop running ccw. | |
215 | */ | |
216 | static int | |
217 | raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) | |
218 | { | |
219 | int retries; | |
220 | int rc; | |
221 | ||
222 | if (raw3270_request_final(rq)) | |
223 | return 0; | |
224 | /* Check if interrupt has already been processed */ | |
225 | for (retries = 0; retries < 5; retries++) { | |
226 | if (retries < 2) | |
227 | rc = ccw_device_halt(rp->cdev, (long) rq); | |
228 | else | |
229 | rc = ccw_device_clear(rp->cdev, (long) rq); | |
230 | if (rc == 0) | |
231 | break; /* termination successful */ | |
232 | } | |
233 | return rc; | |
234 | } | |
235 | ||
236 | static int | |
237 | raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) | |
238 | { | |
239 | unsigned long flags; | |
240 | int rc; | |
241 | ||
242 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
243 | rc = raw3270_halt_io_nolock(rp, rq); | |
244 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
245 | return rc; | |
246 | } | |
247 | ||
248 | /* | |
249 | * Add the request to the request queue, try to start it if the | |
250 | * 3270 device is idle. Return without waiting for end of i/o. | |
251 | */ | |
252 | static int | |
253 | __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, | |
254 | struct raw3270_request *rq) | |
255 | { | |
256 | rq->view = view; | |
257 | raw3270_get_view(view); | |
258 | if (list_empty(&rp->req_queue) && | |
259 | !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
260 | /* No other requests are on the queue. Start this one. */ | |
261 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
262 | (unsigned long) rq, 0, 0); | |
263 | if (rq->rc) { | |
264 | raw3270_put_view(view); | |
265 | return rq->rc; | |
266 | } | |
267 | } | |
268 | list_add_tail(&rq->list, &rp->req_queue); | |
269 | return 0; | |
270 | } | |
271 | ||
272 | int | |
273 | raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) | |
274 | { | |
275 | unsigned long flags; | |
276 | struct raw3270 *rp; | |
277 | int rc; | |
278 | ||
279 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
280 | rp = view->dev; | |
4b214a0c MS |
281 | if (!rp || rp->view != view || |
282 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1da177e4 LT |
283 | rc = -EACCES; |
284 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
285 | rc = -ENODEV; | |
286 | else | |
287 | rc = __raw3270_start(rp, view, rq); | |
288 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
289 | return rc; | |
290 | } | |
291 | ||
ed3cb6f0 RH |
292 | int |
293 | raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) | |
294 | { | |
295 | struct raw3270 *rp; | |
296 | int rc; | |
297 | ||
298 | rp = view->dev; | |
4b214a0c MS |
299 | if (!rp || rp->view != view || |
300 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 RH |
301 | rc = -EACCES; |
302 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
303 | rc = -ENODEV; | |
304 | else | |
305 | rc = __raw3270_start(rp, view, rq); | |
306 | return rc; | |
307 | } | |
308 | ||
1da177e4 LT |
309 | int |
310 | raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) | |
311 | { | |
312 | struct raw3270 *rp; | |
313 | ||
314 | rp = view->dev; | |
315 | rq->view = view; | |
316 | raw3270_get_view(view); | |
317 | list_add_tail(&rq->list, &rp->req_queue); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | /* | |
322 | * 3270 interrupt routine, called from the ccw_device layer | |
323 | */ | |
324 | static void | |
325 | raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
326 | { | |
327 | struct raw3270 *rp; | |
328 | struct raw3270_view *view; | |
329 | struct raw3270_request *rq; | |
330 | int rc; | |
331 | ||
dff59b64 | 332 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
333 | if (!rp) |
334 | return; | |
335 | rq = (struct raw3270_request *) intparm; | |
336 | view = rq ? rq->view : rp->view; | |
337 | ||
338 | if (IS_ERR(irb)) | |
339 | rc = RAW3270_IO_RETRY; | |
23d805b6 | 340 | else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1da177e4 LT |
341 | rq->rc = -EIO; |
342 | rc = RAW3270_IO_DONE; | |
23d805b6 PO |
343 | } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | |
344 | DEV_STAT_UNIT_EXCEP)) { | |
1da177e4 LT |
345 | /* Handle CE-DE-UE and subsequent UDE */ |
346 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); | |
347 | rc = RAW3270_IO_BUSY; | |
348 | } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
349 | /* Wait for UDE if busy flag is set. */ | |
23d805b6 | 350 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
1da177e4 LT |
351 | clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
352 | /* Got it, now retry. */ | |
353 | rc = RAW3270_IO_RETRY; | |
354 | } else | |
355 | rc = RAW3270_IO_BUSY; | |
356 | } else if (view) | |
357 | rc = view->fn->intv(view, rq, irb); | |
358 | else | |
359 | rc = RAW3270_IO_DONE; | |
360 | ||
361 | switch (rc) { | |
362 | case RAW3270_IO_DONE: | |
363 | break; | |
364 | case RAW3270_IO_BUSY: | |
365 | /* | |
366 | * Intervention required by the operator. We have to wait | |
367 | * for unsolicited device end. | |
368 | */ | |
369 | return; | |
370 | case RAW3270_IO_RETRY: | |
371 | if (!rq) | |
372 | break; | |
373 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
374 | (unsigned long) rq, 0, 0); | |
375 | if (rq->rc == 0) | |
3ad2f3fb | 376 | return; /* Successfully restarted. */ |
1da177e4 LT |
377 | break; |
378 | case RAW3270_IO_STOP: | |
379 | if (!rq) | |
380 | break; | |
381 | raw3270_halt_io_nolock(rp, rq); | |
382 | rq->rc = -EIO; | |
383 | break; | |
384 | default: | |
385 | BUG(); | |
386 | } | |
387 | if (rq) { | |
388 | BUG_ON(list_empty(&rq->list)); | |
389 | /* The request completed, remove from queue and do callback. */ | |
390 | list_del_init(&rq->list); | |
391 | if (rq->callback) | |
392 | rq->callback(rq, rq->callback_data); | |
393 | /* Do put_device for get_device in raw3270_start. */ | |
394 | raw3270_put_view(view); | |
395 | } | |
396 | /* | |
397 | * Try to start each request on request queue until one is | |
398 | * started successful. | |
399 | */ | |
400 | while (!list_empty(&rp->req_queue)) { | |
401 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
402 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
403 | (unsigned long) rq, 0, 0); | |
404 | if (rq->rc == 0) | |
405 | break; | |
406 | /* Start failed. Remove request and do callback. */ | |
407 | list_del_init(&rq->list); | |
408 | if (rq->callback) | |
409 | rq->callback(rq, rq->callback_data); | |
410 | /* Do put_device for get_device in raw3270_start. */ | |
411 | raw3270_put_view(view); | |
412 | } | |
413 | } | |
414 | ||
415 | /* | |
416 | * Size sensing. | |
417 | */ | |
418 | ||
419 | struct raw3270_ua { /* Query Reply structure for Usable Area */ | |
420 | struct { /* Usable Area Query Reply Base */ | |
421 | short l; /* Length of this structured field */ | |
422 | char sfid; /* 0x81 if Query Reply */ | |
423 | char qcode; /* 0x81 if Usable Area */ | |
424 | char flags0; | |
425 | char flags1; | |
426 | short w; /* Width of usable area */ | |
427 | short h; /* Heigth of usavle area */ | |
428 | char units; /* 0x00:in; 0x01:mm */ | |
429 | int xr; | |
430 | int yr; | |
431 | char aw; | |
432 | char ah; | |
433 | short buffsz; /* Character buffer size, bytes */ | |
434 | char xmin; | |
435 | char ymin; | |
436 | char xmax; | |
437 | char ymax; | |
438 | } __attribute__ ((packed)) uab; | |
439 | struct { /* Alternate Usable Area Self-Defining Parameter */ | |
440 | char l; /* Length of this Self-Defining Parm */ | |
441 | char sdpid; /* 0x02 if Alternate Usable Area */ | |
442 | char res; | |
443 | char auaid; /* 0x01 is Id for the A U A */ | |
444 | short wauai; /* Width of AUAi */ | |
445 | short hauai; /* Height of AUAi */ | |
446 | char auaunits; /* 0x00:in, 0x01:mm */ | |
447 | int auaxr; | |
448 | int auayr; | |
449 | char awauai; | |
450 | char ahauai; | |
451 | } __attribute__ ((packed)) aua; | |
452 | } __attribute__ ((packed)); | |
453 | ||
1da177e4 | 454 | static struct diag210 raw3270_init_diag210; |
d330f935 | 455 | static DEFINE_MUTEX(raw3270_init_mutex); |
1da177e4 LT |
456 | |
457 | static int | |
458 | raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, | |
459 | struct irb *irb) | |
460 | { | |
461 | /* | |
462 | * Unit-Check Processing: | |
463 | * Expect Command Reject or Intervention Required. | |
464 | */ | |
23d805b6 | 465 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 LT |
466 | /* Request finished abnormally. */ |
467 | if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { | |
468 | set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); | |
469 | return RAW3270_IO_BUSY; | |
470 | } | |
471 | } | |
472 | if (rq) { | |
23d805b6 | 473 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 LT |
474 | if (irb->ecw[0] & SNS0_CMD_REJECT) |
475 | rq->rc = -EOPNOTSUPP; | |
476 | else | |
477 | rq->rc = -EIO; | |
478 | } else | |
479 | /* Request finished normally. Copy residual count. */ | |
23d805b6 | 480 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 | 481 | } |
23d805b6 | 482 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
483 | set_bit(RAW3270_FLAGS_ATTN, &view->dev->flags); |
484 | wake_up(&raw3270_wait_queue); | |
485 | } | |
486 | return RAW3270_IO_DONE; | |
487 | } | |
488 | ||
489 | static struct raw3270_fn raw3270_init_fn = { | |
490 | .intv = raw3270_init_irq | |
491 | }; | |
492 | ||
493 | static struct raw3270_view raw3270_init_view = { | |
494 | .fn = &raw3270_init_fn | |
495 | }; | |
496 | ||
497 | /* | |
498 | * raw3270_wait/raw3270_wait_interruptible/__raw3270_wakeup | |
499 | * Wait for end of request. The request must have been started | |
500 | * with raw3270_start, rc = 0. The device lock may NOT have been | |
501 | * released between calling raw3270_start and raw3270_wait. | |
502 | */ | |
503 | static void | |
504 | raw3270_wake_init(struct raw3270_request *rq, void *data) | |
505 | { | |
506 | wake_up((wait_queue_head_t *) data); | |
507 | } | |
508 | ||
509 | /* | |
510 | * Special wait function that can cope with console initialization. | |
511 | */ | |
512 | static int | |
513 | raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, | |
514 | struct raw3270_request *rq) | |
515 | { | |
516 | unsigned long flags; | |
1da177e4 LT |
517 | int rc; |
518 | ||
519 | #ifdef CONFIG_TN3270_CONSOLE | |
520 | if (raw3270_registered == 0) { | |
521 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
d2c993d8 | 522 | rq->callback = NULL; |
1da177e4 LT |
523 | rc = __raw3270_start(rp, view, rq); |
524 | if (rc == 0) | |
525 | while (!raw3270_request_final(rq)) { | |
526 | wait_cons_dev(); | |
527 | barrier(); | |
528 | } | |
529 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
530 | return rq->rc; | |
531 | } | |
532 | #endif | |
1da177e4 | 533 | rq->callback = raw3270_wake_init; |
54ad6412 | 534 | rq->callback_data = &raw3270_wait_queue; |
1da177e4 LT |
535 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); |
536 | rc = __raw3270_start(rp, view, rq); | |
537 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
538 | if (rc) | |
539 | return rc; | |
540 | /* Now wait for the completion. */ | |
54ad6412 MS |
541 | rc = wait_event_interruptible(raw3270_wait_queue, |
542 | raw3270_request_final(rq)); | |
1da177e4 LT |
543 | if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ |
544 | raw3270_halt_io(view->dev, rq); | |
545 | /* No wait for the halt to complete. */ | |
54ad6412 | 546 | wait_event(raw3270_wait_queue, raw3270_request_final(rq)); |
1da177e4 LT |
547 | return -ERESTARTSYS; |
548 | } | |
549 | return rq->rc; | |
550 | } | |
551 | ||
552 | static int | |
553 | __raw3270_size_device_vm(struct raw3270 *rp) | |
554 | { | |
555 | int rc, model; | |
9a92fe48 | 556 | struct ccw_dev_id dev_id; |
1da177e4 | 557 | |
9a92fe48 CH |
558 | ccw_device_get_id(rp->cdev, &dev_id); |
559 | raw3270_init_diag210.vrdcdvno = dev_id.devno; | |
1da177e4 LT |
560 | raw3270_init_diag210.vrdclen = sizeof(struct diag210); |
561 | rc = diag210(&raw3270_init_diag210); | |
562 | if (rc) | |
563 | return rc; | |
564 | model = raw3270_init_diag210.vrdccrmd; | |
565 | switch (model) { | |
566 | case 2: | |
567 | rp->model = model; | |
568 | rp->rows = 24; | |
569 | rp->cols = 80; | |
570 | break; | |
571 | case 3: | |
572 | rp->model = model; | |
573 | rp->rows = 32; | |
574 | rp->cols = 80; | |
575 | break; | |
576 | case 4: | |
577 | rp->model = model; | |
578 | rp->rows = 43; | |
579 | rp->cols = 80; | |
580 | break; | |
581 | case 5: | |
582 | rp->model = model; | |
583 | rp->rows = 27; | |
584 | rp->cols = 132; | |
585 | break; | |
586 | default: | |
1da177e4 LT |
587 | rc = -EOPNOTSUPP; |
588 | break; | |
589 | } | |
590 | return rc; | |
591 | } | |
592 | ||
593 | static int | |
594 | __raw3270_size_device(struct raw3270 *rp) | |
595 | { | |
596 | static const unsigned char wbuf[] = | |
597 | { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; | |
598 | struct raw3270_ua *uap; | |
599 | unsigned short count; | |
600 | int rc; | |
601 | ||
602 | /* | |
603 | * To determine the size of the 3270 device we need to do: | |
604 | * 1) send a 'read partition' data stream to the device | |
605 | * 2) wait for the attn interrupt that preceeds the query reply | |
606 | * 3) do a read modified to get the query reply | |
607 | * To make things worse we have to cope with intervention | |
608 | * required (3270 device switched to 'stand-by') and command | |
609 | * rejects (old devices that can't do 'read partition'). | |
610 | */ | |
132fab13 MS |
611 | memset(&rp->init_request, 0, sizeof(rp->init_request)); |
612 | memset(&rp->init_data, 0, 256); | |
613 | /* Store 'read partition' data stream to init_data */ | |
614 | memcpy(&rp->init_data, wbuf, sizeof(wbuf)); | |
615 | INIT_LIST_HEAD(&rp->init_request.list); | |
616 | rp->init_request.ccw.cmd_code = TC_WRITESF; | |
617 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
618 | rp->init_request.ccw.count = sizeof(wbuf); | |
619 | rp->init_request.ccw.cda = (__u32) __pa(&rp->init_data); | |
620 | ||
621 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); | |
3863e724 | 622 | if (rc) |
1da177e4 | 623 | /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ |
1da177e4 | 624 | return rc; |
1da177e4 LT |
625 | |
626 | /* Wait for attention interrupt. */ | |
627 | #ifdef CONFIG_TN3270_CONSOLE | |
628 | if (raw3270_registered == 0) { | |
629 | unsigned long flags; | |
630 | ||
631 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
632 | while (!test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)) | |
633 | wait_cons_dev(); | |
634 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
635 | } else | |
636 | #endif | |
637 | rc = wait_event_interruptible(raw3270_wait_queue, | |
638 | test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)); | |
639 | if (rc) | |
640 | return rc; | |
641 | ||
642 | /* | |
643 | * The device accepted the 'read partition' command. Now | |
644 | * set up a read ccw and issue it. | |
645 | */ | |
132fab13 MS |
646 | rp->init_request.ccw.cmd_code = TC_READMOD; |
647 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
648 | rp->init_request.ccw.count = sizeof(rp->init_data); | |
649 | rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); | |
650 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); | |
1da177e4 LT |
651 | if (rc) |
652 | return rc; | |
653 | /* Got a Query Reply */ | |
132fab13 MS |
654 | count = sizeof(rp->init_data) - rp->init_request.rescnt; |
655 | uap = (struct raw3270_ua *) (rp->init_data + 1); | |
1da177e4 | 656 | /* Paranoia check. */ |
132fab13 | 657 | if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) |
1da177e4 LT |
658 | return -EOPNOTSUPP; |
659 | /* Copy rows/columns of default Usable Area */ | |
660 | rp->rows = uap->uab.h; | |
661 | rp->cols = uap->uab.w; | |
662 | /* Check for 14 bit addressing */ | |
663 | if ((uap->uab.flags0 & 0x0d) == 0x01) | |
664 | set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); | |
665 | /* Check for Alternate Usable Area */ | |
666 | if (uap->uab.l == sizeof(struct raw3270_ua) && | |
667 | uap->aua.sdpid == 0x02) { | |
668 | rp->rows = uap->aua.hauai; | |
669 | rp->cols = uap->aua.wauai; | |
670 | } | |
671 | return 0; | |
672 | } | |
673 | ||
674 | static int | |
675 | raw3270_size_device(struct raw3270 *rp) | |
676 | { | |
677 | int rc; | |
678 | ||
d330f935 | 679 | mutex_lock(&raw3270_init_mutex); |
1da177e4 LT |
680 | rp->view = &raw3270_init_view; |
681 | raw3270_init_view.dev = rp; | |
3863e724 MS |
682 | if (MACHINE_IS_VM) |
683 | rc = __raw3270_size_device_vm(rp); | |
684 | else | |
685 | rc = __raw3270_size_device(rp); | |
d2c993d8 HC |
686 | raw3270_init_view.dev = NULL; |
687 | rp->view = NULL; | |
d330f935 | 688 | mutex_unlock(&raw3270_init_mutex); |
1da177e4 LT |
689 | if (rc == 0) { /* Found something. */ |
690 | /* Try to find a model. */ | |
691 | rp->model = 0; | |
692 | if (rp->rows == 24 && rp->cols == 80) | |
693 | rp->model = 2; | |
694 | if (rp->rows == 32 && rp->cols == 80) | |
695 | rp->model = 3; | |
696 | if (rp->rows == 43 && rp->cols == 80) | |
697 | rp->model = 4; | |
698 | if (rp->rows == 27 && rp->cols == 132) | |
699 | rp->model = 5; | |
3863e724 MS |
700 | } else { |
701 | /* Couldn't detect size. Use default model 2. */ | |
702 | rp->model = 2; | |
703 | rp->rows = 24; | |
704 | rp->cols = 80; | |
705 | return 0; | |
1da177e4 LT |
706 | } |
707 | return rc; | |
708 | } | |
709 | ||
710 | static int | |
711 | raw3270_reset_device(struct raw3270 *rp) | |
712 | { | |
713 | int rc; | |
714 | ||
d330f935 | 715 | mutex_lock(&raw3270_init_mutex); |
132fab13 MS |
716 | memset(&rp->init_request, 0, sizeof(rp->init_request)); |
717 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
718 | /* Store reset data stream to init_data/init_request */ | |
719 | rp->init_data[0] = TW_KR; | |
720 | INIT_LIST_HEAD(&rp->init_request.list); | |
721 | rp->init_request.ccw.cmd_code = TC_EWRITEA; | |
722 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
723 | rp->init_request.ccw.count = 1; | |
724 | rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); | |
1da177e4 LT |
725 | rp->view = &raw3270_init_view; |
726 | raw3270_init_view.dev = rp; | |
132fab13 | 727 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); |
d2c993d8 HC |
728 | raw3270_init_view.dev = NULL; |
729 | rp->view = NULL; | |
d330f935 | 730 | mutex_unlock(&raw3270_init_mutex); |
1da177e4 LT |
731 | return rc; |
732 | } | |
733 | ||
ed3cb6f0 RH |
734 | int |
735 | raw3270_reset(struct raw3270_view *view) | |
736 | { | |
737 | struct raw3270 *rp; | |
738 | int rc; | |
739 | ||
740 | rp = view->dev; | |
4b214a0c MS |
741 | if (!rp || rp->view != view || |
742 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 RH |
743 | rc = -EACCES; |
744 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
745 | rc = -ENODEV; | |
746 | else | |
747 | rc = raw3270_reset_device(view->dev); | |
748 | return rc; | |
749 | } | |
750 | ||
1da177e4 LT |
751 | /* |
752 | * Setup new 3270 device. | |
753 | */ | |
754 | static int | |
755 | raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) | |
756 | { | |
757 | struct list_head *l; | |
758 | struct raw3270 *tmp; | |
759 | int minor; | |
760 | ||
761 | memset(rp, 0, sizeof(struct raw3270)); | |
762 | /* Copy ebcdic -> ascii translation table. */ | |
763 | memcpy(ascebc, _ascebc, 256); | |
764 | if (tubxcorrect) { | |
765 | /* correct brackets and circumflex */ | |
766 | ascebc['['] = 0xad; | |
767 | ascebc[']'] = 0xbd; | |
768 | ascebc['^'] = 0xb0; | |
769 | } | |
770 | rp->ascebc = ascebc; | |
771 | ||
772 | /* Set defaults. */ | |
773 | rp->rows = 24; | |
774 | rp->cols = 80; | |
775 | ||
776 | INIT_LIST_HEAD(&rp->req_queue); | |
777 | INIT_LIST_HEAD(&rp->view_list); | |
778 | ||
779 | /* | |
780 | * Add device to list and find the smallest unused minor | |
ed3cb6f0 RH |
781 | * number for it. Note: there is no device with minor 0, |
782 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 783 | */ |
14cc3e2b | 784 | mutex_lock(&raw3270_mutex); |
1da177e4 | 785 | /* Keep the list sorted. */ |
ed3cb6f0 | 786 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
787 | rp->minor = -1; |
788 | list_for_each(l, &raw3270_devices) { | |
789 | tmp = list_entry(l, struct raw3270, list); | |
790 | if (tmp->minor > minor) { | |
791 | rp->minor = minor; | |
792 | __list_add(&rp->list, l->prev, l); | |
793 | break; | |
794 | } | |
795 | minor++; | |
796 | } | |
ed3cb6f0 | 797 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
798 | rp->minor = minor; |
799 | list_add_tail(&rp->list, &raw3270_devices); | |
800 | } | |
14cc3e2b | 801 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
802 | /* No free minor number? Then give up. */ |
803 | if (rp->minor == -1) | |
804 | return -EUSERS; | |
805 | rp->cdev = cdev; | |
dff59b64 | 806 | dev_set_drvdata(&cdev->dev, rp); |
1da177e4 LT |
807 | cdev->handler = raw3270_irq; |
808 | return 0; | |
809 | } | |
810 | ||
811 | #ifdef CONFIG_TN3270_CONSOLE | |
812 | /* | |
813 | * Setup 3270 device configured as console. | |
814 | */ | |
e62133b4 | 815 | struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) |
1da177e4 LT |
816 | { |
817 | struct raw3270 *rp; | |
818 | char *ascebc; | |
819 | int rc; | |
820 | ||
33403dcf HC |
821 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
822 | ascebc = kzalloc(256, GFP_KERNEL); | |
1da177e4 LT |
823 | rc = raw3270_setup_device(cdev, rp, ascebc); |
824 | if (rc) | |
825 | return ERR_PTR(rc); | |
826 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
827 | rc = raw3270_reset_device(rp); | |
828 | if (rc) | |
829 | return ERR_PTR(rc); | |
830 | rc = raw3270_size_device(rp); | |
831 | if (rc) | |
832 | return ERR_PTR(rc); | |
833 | rc = raw3270_reset_device(rp); | |
834 | if (rc) | |
835 | return ERR_PTR(rc); | |
836 | set_bit(RAW3270_FLAGS_READY, &rp->flags); | |
837 | return rp; | |
838 | } | |
839 | ||
840 | void | |
841 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
842 | { | |
843 | unsigned long flags; | |
844 | ||
845 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
846 | wait_cons_dev(); | |
847 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
848 | } | |
849 | ||
850 | #endif | |
851 | ||
852 | /* | |
853 | * Create a 3270 device structure. | |
854 | */ | |
855 | static struct raw3270 * | |
856 | raw3270_create_device(struct ccw_device *cdev) | |
857 | { | |
858 | struct raw3270 *rp; | |
859 | char *ascebc; | |
860 | int rc; | |
861 | ||
132fab13 | 862 | rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
863 | if (!rp) |
864 | return ERR_PTR(-ENOMEM); | |
865 | ascebc = kmalloc(256, GFP_KERNEL); | |
866 | if (!ascebc) { | |
867 | kfree(rp); | |
868 | return ERR_PTR(-ENOMEM); | |
869 | } | |
870 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
871 | if (rc) { | |
872 | kfree(rp->ascebc); | |
873 | kfree(rp); | |
874 | rp = ERR_PTR(rc); | |
875 | } | |
876 | /* Get reference to ccw_device structure. */ | |
877 | get_device(&cdev->dev); | |
878 | return rp; | |
879 | } | |
880 | ||
881 | /* | |
882 | * Activate a view. | |
883 | */ | |
884 | int | |
885 | raw3270_activate_view(struct raw3270_view *view) | |
886 | { | |
887 | struct raw3270 *rp; | |
888 | struct raw3270_view *oldview, *nv; | |
889 | unsigned long flags; | |
890 | int rc; | |
891 | ||
892 | rp = view->dev; | |
893 | if (!rp) | |
894 | return -ENODEV; | |
895 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
896 | if (rp->view == view) | |
897 | rc = 0; | |
898 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
899 | rc = -ENODEV; | |
4b214a0c MS |
900 | else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
901 | rc = -EACCES; | |
1da177e4 | 902 | else { |
d2c993d8 | 903 | oldview = NULL; |
1da177e4 LT |
904 | if (rp->view) { |
905 | oldview = rp->view; | |
906 | oldview->fn->deactivate(oldview); | |
907 | } | |
908 | rp->view = view; | |
909 | rc = view->fn->activate(view); | |
910 | if (rc) { | |
911 | /* Didn't work. Try to reactivate the old view. */ | |
912 | rp->view = oldview; | |
913 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
914 | /* Didn't work as well. Try any other view. */ | |
915 | list_for_each_entry(nv, &rp->view_list, list) | |
916 | if (nv != view && nv != oldview) { | |
917 | rp->view = nv; | |
918 | if (nv->fn->activate(nv) == 0) | |
919 | break; | |
d2c993d8 | 920 | rp->view = NULL; |
1da177e4 LT |
921 | } |
922 | } | |
923 | } | |
924 | } | |
925 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
926 | return rc; | |
927 | } | |
928 | ||
929 | /* | |
930 | * Deactivate current view. | |
931 | */ | |
932 | void | |
933 | raw3270_deactivate_view(struct raw3270_view *view) | |
934 | { | |
935 | unsigned long flags; | |
936 | struct raw3270 *rp; | |
937 | ||
938 | rp = view->dev; | |
939 | if (!rp) | |
940 | return; | |
941 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
942 | if (rp->view == view) { | |
943 | view->fn->deactivate(view); | |
d2c993d8 | 944 | rp->view = NULL; |
1da177e4 LT |
945 | /* Move deactivated view to end of list. */ |
946 | list_del_init(&view->list); | |
947 | list_add_tail(&view->list, &rp->view_list); | |
948 | /* Try to activate another view. */ | |
4b214a0c MS |
949 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags) && |
950 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { | |
ed3cb6f0 RH |
951 | list_for_each_entry(view, &rp->view_list, list) { |
952 | rp->view = view; | |
953 | if (view->fn->activate(view) == 0) | |
1da177e4 | 954 | break; |
d2c993d8 | 955 | rp->view = NULL; |
ed3cb6f0 | 956 | } |
1da177e4 LT |
957 | } |
958 | } | |
959 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
960 | } | |
961 | ||
962 | /* | |
963 | * Add view to device with minor "minor". | |
964 | */ | |
965 | int | |
966 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) | |
967 | { | |
968 | unsigned long flags; | |
969 | struct raw3270 *rp; | |
970 | int rc; | |
971 | ||
ed3cb6f0 RH |
972 | if (minor <= 0) |
973 | return -ENODEV; | |
14cc3e2b | 974 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
975 | rc = -ENODEV; |
976 | list_for_each_entry(rp, &raw3270_devices, list) { | |
977 | if (rp->minor != minor) | |
978 | continue; | |
979 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
980 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
981 | atomic_set(&view->ref_count, 2); | |
982 | view->dev = rp; | |
983 | view->fn = fn; | |
984 | view->model = rp->model; | |
985 | view->rows = rp->rows; | |
986 | view->cols = rp->cols; | |
987 | view->ascebc = rp->ascebc; | |
988 | spin_lock_init(&view->lock); | |
ed3cb6f0 | 989 | list_add(&view->list, &rp->view_list); |
1da177e4 LT |
990 | rc = 0; |
991 | } | |
992 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
993 | break; | |
994 | } | |
14cc3e2b | 995 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
996 | return rc; |
997 | } | |
998 | ||
999 | /* | |
1000 | * Find specific view of device with minor "minor". | |
1001 | */ | |
1002 | struct raw3270_view * | |
1003 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
1004 | { | |
1005 | struct raw3270 *rp; | |
1006 | struct raw3270_view *view, *tmp; | |
1007 | unsigned long flags; | |
1008 | ||
14cc3e2b | 1009 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1010 | view = ERR_PTR(-ENODEV); |
1011 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1012 | if (rp->minor != minor) | |
1013 | continue; | |
1014 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1015 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1016 | view = ERR_PTR(-ENOENT); | |
1017 | list_for_each_entry(tmp, &rp->view_list, list) { | |
1018 | if (tmp->fn == fn) { | |
1019 | raw3270_get_view(tmp); | |
1020 | view = tmp; | |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | } | |
1025 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1026 | break; | |
1027 | } | |
14cc3e2b | 1028 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1029 | return view; |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * Remove view from device and free view structure via call to view->fn->free. | |
1034 | */ | |
1035 | void | |
1036 | raw3270_del_view(struct raw3270_view *view) | |
1037 | { | |
1038 | unsigned long flags; | |
1039 | struct raw3270 *rp; | |
1040 | struct raw3270_view *nv; | |
1041 | ||
1042 | rp = view->dev; | |
1043 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1044 | if (rp->view == view) { | |
1045 | view->fn->deactivate(view); | |
d2c993d8 | 1046 | rp->view = NULL; |
1da177e4 LT |
1047 | } |
1048 | list_del_init(&view->list); | |
4b214a0c MS |
1049 | if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags) && |
1050 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { | |
1da177e4 LT |
1051 | /* Try to activate another view. */ |
1052 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 1053 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
1054 | rp->view = nv; |
1055 | break; | |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1060 | /* Wait for reference counter to drop to zero. */ | |
1061 | atomic_dec(&view->ref_count); | |
1062 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1063 | if (view->fn->free) | |
1064 | view->fn->free(view); | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Remove a 3270 device structure. | |
1069 | */ | |
1070 | static void | |
1071 | raw3270_delete_device(struct raw3270 *rp) | |
1072 | { | |
1073 | struct ccw_device *cdev; | |
1074 | ||
1075 | /* Remove from device chain. */ | |
14cc3e2b | 1076 | mutex_lock(&raw3270_mutex); |
d7cf0d57 | 1077 | if (rp->clttydev && !IS_ERR(rp->clttydev)) |
7f021ce1 | 1078 | device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); |
d7cf0d57 | 1079 | if (rp->cltubdev && !IS_ERR(rp->cltubdev)) |
7f021ce1 | 1080 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, rp->minor)); |
1da177e4 | 1081 | list_del_init(&rp->list); |
14cc3e2b | 1082 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1083 | |
1084 | /* Disconnect from ccw_device. */ | |
1085 | cdev = rp->cdev; | |
d2c993d8 | 1086 | rp->cdev = NULL; |
dff59b64 | 1087 | dev_set_drvdata(&cdev->dev, NULL); |
d2c993d8 | 1088 | cdev->handler = NULL; |
1da177e4 LT |
1089 | |
1090 | /* Put ccw_device structure. */ | |
1091 | put_device(&cdev->dev); | |
1092 | ||
1093 | /* Now free raw3270 structure. */ | |
1094 | kfree(rp->ascebc); | |
1095 | kfree(rp); | |
1096 | } | |
1097 | ||
1098 | static int | |
1099 | raw3270_probe (struct ccw_device *cdev) | |
1100 | { | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Additional attributes for a 3270 device | |
1106 | */ | |
1107 | static ssize_t | |
3fd3c0a5 | 1108 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1109 | { |
1110 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1111 | ((struct raw3270 *) dev_get_drvdata(dev))->model); |
1da177e4 | 1112 | } |
d2c993d8 | 1113 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1114 | |
1115 | static ssize_t | |
3fd3c0a5 | 1116 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1117 | { |
1118 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1119 | ((struct raw3270 *) dev_get_drvdata(dev))->rows); |
1da177e4 | 1120 | } |
d2c993d8 | 1121 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1122 | |
1123 | static ssize_t | |
3fd3c0a5 | 1124 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1125 | { |
1126 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1127 | ((struct raw3270 *) dev_get_drvdata(dev))->cols); |
1da177e4 | 1128 | } |
d2c993d8 | 1129 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1130 | |
1131 | static struct attribute * raw3270_attrs[] = { | |
1132 | &dev_attr_model.attr, | |
1133 | &dev_attr_rows.attr, | |
1134 | &dev_attr_columns.attr, | |
1135 | NULL, | |
1136 | }; | |
1137 | ||
1138 | static struct attribute_group raw3270_attr_group = { | |
1139 | .attrs = raw3270_attrs, | |
1140 | }; | |
1141 | ||
d7cf0d57 | 1142 | static int raw3270_create_attributes(struct raw3270 *rp) |
1da177e4 | 1143 | { |
d7cf0d57 HC |
1144 | int rc; |
1145 | ||
1146 | rc = sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
1147 | if (rc) | |
1148 | goto out; | |
1149 | ||
ea9e42f6 GKH |
1150 | rp->clttydev = device_create(class3270, &rp->cdev->dev, |
1151 | MKDEV(IBM_TTY3270_MAJOR, rp->minor), NULL, | |
1152 | "tty%s", dev_name(&rp->cdev->dev)); | |
d7cf0d57 HC |
1153 | if (IS_ERR(rp->clttydev)) { |
1154 | rc = PTR_ERR(rp->clttydev); | |
1155 | goto out_ttydev; | |
1156 | } | |
1157 | ||
ea9e42f6 GKH |
1158 | rp->cltubdev = device_create(class3270, &rp->cdev->dev, |
1159 | MKDEV(IBM_FS3270_MAJOR, rp->minor), NULL, | |
1160 | "tub%s", dev_name(&rp->cdev->dev)); | |
d7cf0d57 HC |
1161 | if (!IS_ERR(rp->cltubdev)) |
1162 | goto out; | |
1163 | ||
1164 | rc = PTR_ERR(rp->cltubdev); | |
7f021ce1 | 1165 | device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); |
d7cf0d57 HC |
1166 | |
1167 | out_ttydev: | |
1168 | sysfs_remove_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
1169 | out: | |
1170 | return rc; | |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | /* | |
1174 | * Notifier for device addition/removal | |
1175 | */ | |
1176 | struct raw3270_notifier { | |
1177 | struct list_head list; | |
1178 | void (*notifier)(int, int); | |
1179 | }; | |
1180 | ||
c11ca97e | 1181 | static LIST_HEAD(raw3270_notifier); |
1da177e4 LT |
1182 | |
1183 | int raw3270_register_notifier(void (*notifier)(int, int)) | |
1184 | { | |
1185 | struct raw3270_notifier *np; | |
1186 | struct raw3270 *rp; | |
1187 | ||
1188 | np = kmalloc(sizeof(struct raw3270_notifier), GFP_KERNEL); | |
1189 | if (!np) | |
1190 | return -ENOMEM; | |
1191 | np->notifier = notifier; | |
14cc3e2b | 1192 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1193 | list_add_tail(&np->list, &raw3270_notifier); |
1194 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1195 | get_device(&rp->cdev->dev); | |
1196 | notifier(rp->minor, 1); | |
1197 | } | |
14cc3e2b | 1198 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1199 | return 0; |
1200 | } | |
1201 | ||
1202 | void raw3270_unregister_notifier(void (*notifier)(int, int)) | |
1203 | { | |
1204 | struct raw3270_notifier *np; | |
1205 | ||
14cc3e2b | 1206 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1207 | list_for_each_entry(np, &raw3270_notifier, list) |
1208 | if (np->notifier == notifier) { | |
1209 | list_del(&np->list); | |
1210 | kfree(np); | |
1211 | break; | |
1212 | } | |
14cc3e2b | 1213 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1214 | } |
1215 | ||
1216 | /* | |
1217 | * Set 3270 device online. | |
1218 | */ | |
1219 | static int | |
1220 | raw3270_set_online (struct ccw_device *cdev) | |
1221 | { | |
1222 | struct raw3270 *rp; | |
1223 | struct raw3270_notifier *np; | |
1224 | int rc; | |
1225 | ||
1226 | rp = raw3270_create_device(cdev); | |
1227 | if (IS_ERR(rp)) | |
1228 | return PTR_ERR(rp); | |
1229 | rc = raw3270_reset_device(rp); | |
1230 | if (rc) | |
ed3cb6f0 | 1231 | goto failure; |
1da177e4 LT |
1232 | rc = raw3270_size_device(rp); |
1233 | if (rc) | |
ed3cb6f0 | 1234 | goto failure; |
1da177e4 LT |
1235 | rc = raw3270_reset_device(rp); |
1236 | if (rc) | |
ed3cb6f0 | 1237 | goto failure; |
d7cf0d57 HC |
1238 | rc = raw3270_create_attributes(rp); |
1239 | if (rc) | |
1240 | goto failure; | |
1da177e4 | 1241 | set_bit(RAW3270_FLAGS_READY, &rp->flags); |
14cc3e2b | 1242 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1243 | list_for_each_entry(np, &raw3270_notifier, list) |
1244 | np->notifier(rp->minor, 1); | |
14cc3e2b | 1245 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1246 | return 0; |
ed3cb6f0 RH |
1247 | |
1248 | failure: | |
1249 | raw3270_delete_device(rp); | |
1250 | return rc; | |
1da177e4 LT |
1251 | } |
1252 | ||
1253 | /* | |
1254 | * Remove 3270 device structure. | |
1255 | */ | |
1256 | static void | |
1257 | raw3270_remove (struct ccw_device *cdev) | |
1258 | { | |
1259 | unsigned long flags; | |
1260 | struct raw3270 *rp; | |
1261 | struct raw3270_view *v; | |
1262 | struct raw3270_notifier *np; | |
1263 | ||
dff59b64 | 1264 | rp = dev_get_drvdata(&cdev->dev); |
ed3cb6f0 RH |
1265 | /* |
1266 | * _remove is the opposite of _probe; it's probe that | |
1267 | * should set up rp. raw3270_remove gets entered for | |
1268 | * devices even if they haven't been varied online. | |
1269 | * Thus, rp may validly be NULL here. | |
1270 | */ | |
1271 | if (rp == NULL) | |
1272 | return; | |
1da177e4 LT |
1273 | clear_bit(RAW3270_FLAGS_READY, &rp->flags); |
1274 | ||
1275 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1276 | ||
1277 | /* Deactivate current view and remove all views. */ | |
1278 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1279 | if (rp->view) { | |
1280 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1281 | rp->view = NULL; |
1da177e4 LT |
1282 | } |
1283 | while (!list_empty(&rp->view_list)) { | |
1284 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1285 | if (v->fn->release) | |
1286 | v->fn->release(v); | |
1287 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1288 | raw3270_del_view(v); | |
1289 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1290 | } | |
1291 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1292 | ||
14cc3e2b | 1293 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1294 | list_for_each_entry(np, &raw3270_notifier, list) |
1295 | np->notifier(rp->minor, 0); | |
14cc3e2b | 1296 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1297 | |
1298 | /* Reset 3270 device. */ | |
1299 | raw3270_reset_device(rp); | |
1300 | /* And finally remove it. */ | |
1301 | raw3270_delete_device(rp); | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * Set 3270 device offline. | |
1306 | */ | |
1307 | static int | |
1308 | raw3270_set_offline (struct ccw_device *cdev) | |
1309 | { | |
1310 | struct raw3270 *rp; | |
1311 | ||
dff59b64 | 1312 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
1313 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) |
1314 | return -EBUSY; | |
1315 | raw3270_remove(cdev); | |
1316 | return 0; | |
1317 | } | |
1318 | ||
4b214a0c MS |
1319 | static int raw3270_pm_stop(struct ccw_device *cdev) |
1320 | { | |
1321 | struct raw3270 *rp; | |
1322 | struct raw3270_view *view; | |
1323 | unsigned long flags; | |
1324 | ||
4f0076f7 | 1325 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1326 | if (!rp) |
1327 | return 0; | |
1328 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1329 | if (rp->view) | |
1330 | rp->view->fn->deactivate(rp->view); | |
1331 | if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { | |
1332 | /* | |
1333 | * Release tty and fullscreen for all non-console | |
1334 | * devices. | |
1335 | */ | |
1336 | list_for_each_entry(view, &rp->view_list, list) { | |
1337 | if (view->fn->release) | |
1338 | view->fn->release(view); | |
1339 | } | |
1340 | } | |
1341 | set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1342 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | static int raw3270_pm_start(struct ccw_device *cdev) | |
1347 | { | |
1348 | struct raw3270 *rp; | |
1349 | unsigned long flags; | |
1350 | ||
4f0076f7 | 1351 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1352 | if (!rp) |
1353 | return 0; | |
1354 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1355 | clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1356 | if (rp->view) | |
1357 | rp->view->fn->activate(rp->view); | |
1358 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | void raw3270_pm_unfreeze(struct raw3270_view *view) | |
1363 | { | |
34483cac | 1364 | #ifdef CONFIG_TN3270_CONSOLE |
4b214a0c MS |
1365 | struct raw3270 *rp; |
1366 | ||
1367 | rp = view->dev; | |
1368 | if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1369 | ccw_device_force_console(); | |
34483cac | 1370 | #endif |
4b214a0c MS |
1371 | } |
1372 | ||
1da177e4 LT |
1373 | static struct ccw_device_id raw3270_id[] = { |
1374 | { CCW_DEVICE(0x3270, 0) }, | |
1375 | { CCW_DEVICE(0x3271, 0) }, | |
1376 | { CCW_DEVICE(0x3272, 0) }, | |
1377 | { CCW_DEVICE(0x3273, 0) }, | |
1378 | { CCW_DEVICE(0x3274, 0) }, | |
1379 | { CCW_DEVICE(0x3275, 0) }, | |
1380 | { CCW_DEVICE(0x3276, 0) }, | |
1381 | { CCW_DEVICE(0x3277, 0) }, | |
1382 | { CCW_DEVICE(0x3278, 0) }, | |
1383 | { CCW_DEVICE(0x3279, 0) }, | |
1384 | { CCW_DEVICE(0x3174, 0) }, | |
1385 | { /* end of list */ }, | |
1386 | }; | |
1387 | ||
1388 | static struct ccw_driver raw3270_ccw_driver = { | |
1389 | .name = "3270", | |
1390 | .owner = THIS_MODULE, | |
1391 | .ids = raw3270_id, | |
1392 | .probe = &raw3270_probe, | |
1393 | .remove = &raw3270_remove, | |
1394 | .set_online = &raw3270_set_online, | |
1395 | .set_offline = &raw3270_set_offline, | |
4b214a0c MS |
1396 | .freeze = &raw3270_pm_stop, |
1397 | .thaw = &raw3270_pm_start, | |
1398 | .restore = &raw3270_pm_start, | |
1da177e4 LT |
1399 | }; |
1400 | ||
1401 | static int | |
1402 | raw3270_init(void) | |
1403 | { | |
1404 | struct raw3270 *rp; | |
1405 | int rc; | |
1406 | ||
1407 | if (raw3270_registered) | |
1408 | return 0; | |
1409 | raw3270_registered = 1; | |
1410 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1411 | if (rc == 0) { | |
1412 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1413 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1414 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1415 | list_for_each_entry(rp, &raw3270_devices, list) { |
1416 | get_device(&rp->cdev->dev); | |
1417 | raw3270_create_attributes(rp); | |
1418 | } | |
14cc3e2b | 1419 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1420 | } |
1421 | return rc; | |
1422 | } | |
1423 | ||
1424 | static void | |
1425 | raw3270_exit(void) | |
1426 | { | |
1427 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1428 | class_destroy(class3270); |
1da177e4 LT |
1429 | } |
1430 | ||
1431 | MODULE_LICENSE("GPL"); | |
1432 | ||
1433 | module_init(raw3270_init); | |
1434 | module_exit(raw3270_exit); | |
1435 | ||
1436 | EXPORT_SYMBOL(raw3270_request_alloc); | |
1437 | EXPORT_SYMBOL(raw3270_request_free); | |
1438 | EXPORT_SYMBOL(raw3270_request_reset); | |
1439 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1440 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1441 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1442 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1443 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1444 | EXPORT_SYMBOL(raw3270_add_view); | |
1445 | EXPORT_SYMBOL(raw3270_del_view); | |
1446 | EXPORT_SYMBOL(raw3270_find_view); | |
1447 | EXPORT_SYMBOL(raw3270_activate_view); | |
1448 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1449 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1450 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1451 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1452 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1453 | EXPORT_SYMBOL(raw3270_register_notifier); |
1454 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1455 | EXPORT_SYMBOL(raw3270_wait_queue); |