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Commit | Line | Data |
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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/bootmem.h> |
11 | #include <linux/module.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/wait.h> | |
19 | ||
20 | #include <asm/ccwdev.h> | |
21 | #include <asm/cio.h> | |
22 | #include <asm/ebcdic.h> | |
0a87c5cf | 23 | #include <asm/diag.h> |
1da177e4 LT |
24 | |
25 | #include "raw3270.h" | |
26 | ||
ed3cb6f0 RH |
27 | #include <linux/major.h> |
28 | #include <linux/kdev_t.h> | |
29 | #include <linux/device.h> | |
14cc3e2b | 30 | #include <linux/mutex.h> |
ed3cb6f0 | 31 | |
2b67fc46 | 32 | static struct class *class3270; |
ed3cb6f0 | 33 | |
1da177e4 LT |
34 | /* The main 3270 data structure. */ |
35 | struct raw3270 { | |
36 | struct list_head list; | |
37 | struct ccw_device *cdev; | |
38 | int minor; | |
39 | ||
40 | short model, rows, cols; | |
41 | unsigned long flags; | |
42 | ||
43 | struct list_head req_queue; /* Request queue. */ | |
44 | struct list_head view_list; /* List of available views. */ | |
45 | struct raw3270_view *view; /* Active view. */ | |
46 | ||
47 | struct timer_list timer; /* Device timer. */ | |
48 | ||
49 | unsigned char *ascebc; /* ascii -> ebcdic table */ | |
7f021ce1 CH |
50 | struct device *clttydev; /* 3270-class tty device ptr */ |
51 | struct device *cltubdev; /* 3270-class tub device ptr */ | |
132fab13 MS |
52 | |
53 | struct raw3270_request init_request; | |
54 | unsigned char init_data[256]; | |
1da177e4 LT |
55 | }; |
56 | ||
57 | /* raw3270->flags */ | |
58 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ | |
59 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ | |
60 | #define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */ | |
61 | #define RAW3270_FLAGS_READY 4 /* Device is useable by views */ | |
62 | #define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */ | |
4b214a0c | 63 | #define RAW3270_FLAGS_FROZEN 16 /* set if 3270 is frozen for suspend */ |
1da177e4 LT |
64 | |
65 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ | |
14cc3e2b | 66 | static DEFINE_MUTEX(raw3270_mutex); |
1da177e4 LT |
67 | |
68 | /* List of 3270 devices. */ | |
c11ca97e | 69 | static LIST_HEAD(raw3270_devices); |
1da177e4 LT |
70 | |
71 | /* | |
72 | * Flag to indicate if the driver has been registered. Some operations | |
73 | * like waiting for the end of i/o need to be done differently as long | |
74 | * as the kernel is still starting up (console support). | |
75 | */ | |
76 | static int raw3270_registered; | |
77 | ||
78 | /* Module parameters */ | |
79 | static int tubxcorrect = 0; | |
80 | module_param(tubxcorrect, bool, 0); | |
81 | ||
82 | /* | |
83 | * Wait queue for device init/delete, view delete. | |
84 | */ | |
85 | DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); | |
86 | ||
87 | /* | |
88 | * Encode array for 12 bit 3270 addresses. | |
89 | */ | |
2b67fc46 | 90 | static unsigned char raw3270_ebcgraf[64] = { |
1da177e4 LT |
91 | 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, |
92 | 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
93 | 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
94 | 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, | |
95 | 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
96 | 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
97 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
98 | 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f | |
99 | }; | |
100 | ||
101 | void | |
102 | raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) | |
103 | { | |
104 | if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { | |
105 | cp[0] = (addr >> 8) & 0x3f; | |
106 | cp[1] = addr & 0xff; | |
107 | } else { | |
108 | cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; | |
109 | cp[1] = raw3270_ebcgraf[addr & 0x3f]; | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * Allocate a new 3270 ccw request | |
115 | */ | |
116 | struct raw3270_request * | |
117 | raw3270_request_alloc(size_t size) | |
118 | { | |
119 | struct raw3270_request *rq; | |
120 | ||
121 | /* Allocate request structure */ | |
88abaab4 | 122 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
123 | if (!rq) |
124 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
125 | |
126 | /* alloc output buffer. */ | |
127 | if (size > 0) { | |
128 | rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
129 | if (!rq->buffer) { | |
130 | kfree(rq); | |
131 | return ERR_PTR(-ENOMEM); | |
132 | } | |
133 | } | |
134 | rq->size = size; | |
135 | INIT_LIST_HEAD(&rq->list); | |
136 | ||
137 | /* | |
138 | * Setup ccw. | |
139 | */ | |
140 | rq->ccw.cda = __pa(rq->buffer); | |
141 | rq->ccw.flags = CCW_FLAG_SLI; | |
142 | ||
143 | return rq; | |
144 | } | |
145 | ||
146 | #ifdef CONFIG_TN3270_CONSOLE | |
147 | /* | |
148 | * Allocate a new 3270 ccw request from bootmem. Only works very | |
149 | * early in the boot process. Only con3270.c should be using this. | |
150 | */ | |
e62133b4 | 151 | struct raw3270_request __init *raw3270_request_alloc_bootmem(size_t size) |
1da177e4 LT |
152 | { |
153 | struct raw3270_request *rq; | |
154 | ||
155 | rq = alloc_bootmem_low(sizeof(struct raw3270)); | |
1da177e4 LT |
156 | |
157 | /* alloc output buffer. */ | |
3ca1c990 | 158 | if (size > 0) |
1da177e4 | 159 | rq->buffer = alloc_bootmem_low(size); |
1da177e4 LT |
160 | rq->size = size; |
161 | INIT_LIST_HEAD(&rq->list); | |
162 | ||
163 | /* | |
164 | * Setup ccw. | |
165 | */ | |
166 | rq->ccw.cda = __pa(rq->buffer); | |
167 | rq->ccw.flags = CCW_FLAG_SLI; | |
168 | ||
169 | return rq; | |
170 | } | |
171 | #endif | |
172 | ||
173 | /* | |
174 | * Free 3270 ccw request | |
175 | */ | |
176 | void | |
177 | raw3270_request_free (struct raw3270_request *rq) | |
178 | { | |
17fd682e | 179 | kfree(rq->buffer); |
1da177e4 LT |
180 | kfree(rq); |
181 | } | |
182 | ||
183 | /* | |
184 | * Reset request to initial state. | |
185 | */ | |
186 | void | |
187 | raw3270_request_reset(struct raw3270_request *rq) | |
188 | { | |
189 | BUG_ON(!list_empty(&rq->list)); | |
190 | rq->ccw.cmd_code = 0; | |
191 | rq->ccw.count = 0; | |
192 | rq->ccw.cda = __pa(rq->buffer); | |
193 | rq->ccw.flags = CCW_FLAG_SLI; | |
194 | rq->rescnt = 0; | |
195 | rq->rc = 0; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Set command code to ccw of a request. | |
200 | */ | |
201 | void | |
202 | raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) | |
203 | { | |
204 | rq->ccw.cmd_code = cmd; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Add data fragment to output buffer. | |
209 | */ | |
210 | int | |
211 | raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) | |
212 | { | |
213 | if (size + rq->ccw.count > rq->size) | |
214 | return -E2BIG; | |
215 | memcpy(rq->buffer + rq->ccw.count, data, size); | |
216 | rq->ccw.count += size; | |
217 | return 0; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Set address/length pair to ccw of a request. | |
222 | */ | |
223 | void | |
224 | raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) | |
225 | { | |
226 | rq->ccw.cda = __pa(data); | |
227 | rq->ccw.count = size; | |
228 | } | |
229 | ||
230 | /* | |
231 | * Set idal buffer to ccw of a request. | |
232 | */ | |
233 | void | |
234 | raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) | |
235 | { | |
236 | rq->ccw.cda = __pa(ib->data); | |
237 | rq->ccw.count = ib->size; | |
238 | rq->ccw.flags |= CCW_FLAG_IDA; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Stop running ccw. | |
243 | */ | |
244 | static int | |
245 | raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) | |
246 | { | |
247 | int retries; | |
248 | int rc; | |
249 | ||
250 | if (raw3270_request_final(rq)) | |
251 | return 0; | |
252 | /* Check if interrupt has already been processed */ | |
253 | for (retries = 0; retries < 5; retries++) { | |
254 | if (retries < 2) | |
255 | rc = ccw_device_halt(rp->cdev, (long) rq); | |
256 | else | |
257 | rc = ccw_device_clear(rp->cdev, (long) rq); | |
258 | if (rc == 0) | |
259 | break; /* termination successful */ | |
260 | } | |
261 | return rc; | |
262 | } | |
263 | ||
264 | static int | |
265 | raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) | |
266 | { | |
267 | unsigned long flags; | |
268 | int rc; | |
269 | ||
270 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
271 | rc = raw3270_halt_io_nolock(rp, rq); | |
272 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
273 | return rc; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Add the request to the request queue, try to start it if the | |
278 | * 3270 device is idle. Return without waiting for end of i/o. | |
279 | */ | |
280 | static int | |
281 | __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, | |
282 | struct raw3270_request *rq) | |
283 | { | |
284 | rq->view = view; | |
285 | raw3270_get_view(view); | |
286 | if (list_empty(&rp->req_queue) && | |
287 | !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
288 | /* No other requests are on the queue. Start this one. */ | |
289 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
290 | (unsigned long) rq, 0, 0); | |
291 | if (rq->rc) { | |
292 | raw3270_put_view(view); | |
293 | return rq->rc; | |
294 | } | |
295 | } | |
296 | list_add_tail(&rq->list, &rp->req_queue); | |
297 | return 0; | |
298 | } | |
299 | ||
300 | int | |
301 | raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) | |
302 | { | |
303 | unsigned long flags; | |
304 | struct raw3270 *rp; | |
305 | int rc; | |
306 | ||
307 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
308 | rp = view->dev; | |
4b214a0c MS |
309 | if (!rp || rp->view != view || |
310 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1da177e4 LT |
311 | rc = -EACCES; |
312 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
313 | rc = -ENODEV; | |
314 | else | |
315 | rc = __raw3270_start(rp, view, rq); | |
316 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
317 | return rc; | |
318 | } | |
319 | ||
ed3cb6f0 RH |
320 | int |
321 | raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) | |
322 | { | |
323 | struct raw3270 *rp; | |
324 | int rc; | |
325 | ||
326 | rp = view->dev; | |
4b214a0c MS |
327 | if (!rp || rp->view != view || |
328 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 RH |
329 | rc = -EACCES; |
330 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
331 | rc = -ENODEV; | |
332 | else | |
333 | rc = __raw3270_start(rp, view, rq); | |
334 | return rc; | |
335 | } | |
336 | ||
1da177e4 LT |
337 | int |
338 | raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) | |
339 | { | |
340 | struct raw3270 *rp; | |
341 | ||
342 | rp = view->dev; | |
343 | rq->view = view; | |
344 | raw3270_get_view(view); | |
345 | list_add_tail(&rq->list, &rp->req_queue); | |
346 | return 0; | |
347 | } | |
348 | ||
349 | /* | |
350 | * 3270 interrupt routine, called from the ccw_device layer | |
351 | */ | |
352 | static void | |
353 | raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
354 | { | |
355 | struct raw3270 *rp; | |
356 | struct raw3270_view *view; | |
357 | struct raw3270_request *rq; | |
358 | int rc; | |
359 | ||
360 | rp = (struct raw3270 *) cdev->dev.driver_data; | |
361 | if (!rp) | |
362 | return; | |
363 | rq = (struct raw3270_request *) intparm; | |
364 | view = rq ? rq->view : rp->view; | |
365 | ||
366 | if (IS_ERR(irb)) | |
367 | rc = RAW3270_IO_RETRY; | |
23d805b6 | 368 | else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1da177e4 LT |
369 | rq->rc = -EIO; |
370 | rc = RAW3270_IO_DONE; | |
23d805b6 PO |
371 | } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | |
372 | DEV_STAT_UNIT_EXCEP)) { | |
1da177e4 LT |
373 | /* Handle CE-DE-UE and subsequent UDE */ |
374 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); | |
375 | rc = RAW3270_IO_BUSY; | |
376 | } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
377 | /* Wait for UDE if busy flag is set. */ | |
23d805b6 | 378 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
1da177e4 LT |
379 | clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
380 | /* Got it, now retry. */ | |
381 | rc = RAW3270_IO_RETRY; | |
382 | } else | |
383 | rc = RAW3270_IO_BUSY; | |
384 | } else if (view) | |
385 | rc = view->fn->intv(view, rq, irb); | |
386 | else | |
387 | rc = RAW3270_IO_DONE; | |
388 | ||
389 | switch (rc) { | |
390 | case RAW3270_IO_DONE: | |
391 | break; | |
392 | case RAW3270_IO_BUSY: | |
393 | /* | |
394 | * Intervention required by the operator. We have to wait | |
395 | * for unsolicited device end. | |
396 | */ | |
397 | return; | |
398 | case RAW3270_IO_RETRY: | |
399 | if (!rq) | |
400 | break; | |
401 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
402 | (unsigned long) rq, 0, 0); | |
403 | if (rq->rc == 0) | |
404 | return; /* Sucessfully restarted. */ | |
405 | break; | |
406 | case RAW3270_IO_STOP: | |
407 | if (!rq) | |
408 | break; | |
409 | raw3270_halt_io_nolock(rp, rq); | |
410 | rq->rc = -EIO; | |
411 | break; | |
412 | default: | |
413 | BUG(); | |
414 | } | |
415 | if (rq) { | |
416 | BUG_ON(list_empty(&rq->list)); | |
417 | /* The request completed, remove from queue and do callback. */ | |
418 | list_del_init(&rq->list); | |
419 | if (rq->callback) | |
420 | rq->callback(rq, rq->callback_data); | |
421 | /* Do put_device for get_device in raw3270_start. */ | |
422 | raw3270_put_view(view); | |
423 | } | |
424 | /* | |
425 | * Try to start each request on request queue until one is | |
426 | * started successful. | |
427 | */ | |
428 | while (!list_empty(&rp->req_queue)) { | |
429 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
430 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
431 | (unsigned long) rq, 0, 0); | |
432 | if (rq->rc == 0) | |
433 | break; | |
434 | /* Start failed. Remove request and do callback. */ | |
435 | list_del_init(&rq->list); | |
436 | if (rq->callback) | |
437 | rq->callback(rq, rq->callback_data); | |
438 | /* Do put_device for get_device in raw3270_start. */ | |
439 | raw3270_put_view(view); | |
440 | } | |
441 | } | |
442 | ||
443 | /* | |
444 | * Size sensing. | |
445 | */ | |
446 | ||
447 | struct raw3270_ua { /* Query Reply structure for Usable Area */ | |
448 | struct { /* Usable Area Query Reply Base */ | |
449 | short l; /* Length of this structured field */ | |
450 | char sfid; /* 0x81 if Query Reply */ | |
451 | char qcode; /* 0x81 if Usable Area */ | |
452 | char flags0; | |
453 | char flags1; | |
454 | short w; /* Width of usable area */ | |
455 | short h; /* Heigth of usavle area */ | |
456 | char units; /* 0x00:in; 0x01:mm */ | |
457 | int xr; | |
458 | int yr; | |
459 | char aw; | |
460 | char ah; | |
461 | short buffsz; /* Character buffer size, bytes */ | |
462 | char xmin; | |
463 | char ymin; | |
464 | char xmax; | |
465 | char ymax; | |
466 | } __attribute__ ((packed)) uab; | |
467 | struct { /* Alternate Usable Area Self-Defining Parameter */ | |
468 | char l; /* Length of this Self-Defining Parm */ | |
469 | char sdpid; /* 0x02 if Alternate Usable Area */ | |
470 | char res; | |
471 | char auaid; /* 0x01 is Id for the A U A */ | |
472 | short wauai; /* Width of AUAi */ | |
473 | short hauai; /* Height of AUAi */ | |
474 | char auaunits; /* 0x00:in, 0x01:mm */ | |
475 | int auaxr; | |
476 | int auayr; | |
477 | char awauai; | |
478 | char ahauai; | |
479 | } __attribute__ ((packed)) aua; | |
480 | } __attribute__ ((packed)); | |
481 | ||
1da177e4 | 482 | static struct diag210 raw3270_init_diag210; |
d330f935 | 483 | static DEFINE_MUTEX(raw3270_init_mutex); |
1da177e4 LT |
484 | |
485 | static int | |
486 | raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, | |
487 | struct irb *irb) | |
488 | { | |
489 | /* | |
490 | * Unit-Check Processing: | |
491 | * Expect Command Reject or Intervention Required. | |
492 | */ | |
23d805b6 | 493 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 LT |
494 | /* Request finished abnormally. */ |
495 | if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { | |
496 | set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); | |
497 | return RAW3270_IO_BUSY; | |
498 | } | |
499 | } | |
500 | if (rq) { | |
23d805b6 | 501 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 LT |
502 | if (irb->ecw[0] & SNS0_CMD_REJECT) |
503 | rq->rc = -EOPNOTSUPP; | |
504 | else | |
505 | rq->rc = -EIO; | |
506 | } else | |
507 | /* Request finished normally. Copy residual count. */ | |
23d805b6 | 508 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 | 509 | } |
23d805b6 | 510 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
511 | set_bit(RAW3270_FLAGS_ATTN, &view->dev->flags); |
512 | wake_up(&raw3270_wait_queue); | |
513 | } | |
514 | return RAW3270_IO_DONE; | |
515 | } | |
516 | ||
517 | static struct raw3270_fn raw3270_init_fn = { | |
518 | .intv = raw3270_init_irq | |
519 | }; | |
520 | ||
521 | static struct raw3270_view raw3270_init_view = { | |
522 | .fn = &raw3270_init_fn | |
523 | }; | |
524 | ||
525 | /* | |
526 | * raw3270_wait/raw3270_wait_interruptible/__raw3270_wakeup | |
527 | * Wait for end of request. The request must have been started | |
528 | * with raw3270_start, rc = 0. The device lock may NOT have been | |
529 | * released between calling raw3270_start and raw3270_wait. | |
530 | */ | |
531 | static void | |
532 | raw3270_wake_init(struct raw3270_request *rq, void *data) | |
533 | { | |
534 | wake_up((wait_queue_head_t *) data); | |
535 | } | |
536 | ||
537 | /* | |
538 | * Special wait function that can cope with console initialization. | |
539 | */ | |
540 | static int | |
541 | raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, | |
542 | struct raw3270_request *rq) | |
543 | { | |
544 | unsigned long flags; | |
1da177e4 LT |
545 | int rc; |
546 | ||
547 | #ifdef CONFIG_TN3270_CONSOLE | |
548 | if (raw3270_registered == 0) { | |
549 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
d2c993d8 | 550 | rq->callback = NULL; |
1da177e4 LT |
551 | rc = __raw3270_start(rp, view, rq); |
552 | if (rc == 0) | |
553 | while (!raw3270_request_final(rq)) { | |
554 | wait_cons_dev(); | |
555 | barrier(); | |
556 | } | |
557 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
558 | return rq->rc; | |
559 | } | |
560 | #endif | |
1da177e4 | 561 | rq->callback = raw3270_wake_init; |
54ad6412 | 562 | rq->callback_data = &raw3270_wait_queue; |
1da177e4 LT |
563 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); |
564 | rc = __raw3270_start(rp, view, rq); | |
565 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
566 | if (rc) | |
567 | return rc; | |
568 | /* Now wait for the completion. */ | |
54ad6412 MS |
569 | rc = wait_event_interruptible(raw3270_wait_queue, |
570 | raw3270_request_final(rq)); | |
1da177e4 LT |
571 | if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ |
572 | raw3270_halt_io(view->dev, rq); | |
573 | /* No wait for the halt to complete. */ | |
54ad6412 | 574 | wait_event(raw3270_wait_queue, raw3270_request_final(rq)); |
1da177e4 LT |
575 | return -ERESTARTSYS; |
576 | } | |
577 | return rq->rc; | |
578 | } | |
579 | ||
580 | static int | |
581 | __raw3270_size_device_vm(struct raw3270 *rp) | |
582 | { | |
583 | int rc, model; | |
9a92fe48 | 584 | struct ccw_dev_id dev_id; |
1da177e4 | 585 | |
9a92fe48 CH |
586 | ccw_device_get_id(rp->cdev, &dev_id); |
587 | raw3270_init_diag210.vrdcdvno = dev_id.devno; | |
1da177e4 LT |
588 | raw3270_init_diag210.vrdclen = sizeof(struct diag210); |
589 | rc = diag210(&raw3270_init_diag210); | |
590 | if (rc) | |
591 | return rc; | |
592 | model = raw3270_init_diag210.vrdccrmd; | |
593 | switch (model) { | |
594 | case 2: | |
595 | rp->model = model; | |
596 | rp->rows = 24; | |
597 | rp->cols = 80; | |
598 | break; | |
599 | case 3: | |
600 | rp->model = model; | |
601 | rp->rows = 32; | |
602 | rp->cols = 80; | |
603 | break; | |
604 | case 4: | |
605 | rp->model = model; | |
606 | rp->rows = 43; | |
607 | rp->cols = 80; | |
608 | break; | |
609 | case 5: | |
610 | rp->model = model; | |
611 | rp->rows = 27; | |
612 | rp->cols = 132; | |
613 | break; | |
614 | default: | |
1da177e4 LT |
615 | rc = -EOPNOTSUPP; |
616 | break; | |
617 | } | |
618 | return rc; | |
619 | } | |
620 | ||
621 | static int | |
622 | __raw3270_size_device(struct raw3270 *rp) | |
623 | { | |
624 | static const unsigned char wbuf[] = | |
625 | { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; | |
626 | struct raw3270_ua *uap; | |
627 | unsigned short count; | |
628 | int rc; | |
629 | ||
630 | /* | |
631 | * To determine the size of the 3270 device we need to do: | |
632 | * 1) send a 'read partition' data stream to the device | |
633 | * 2) wait for the attn interrupt that preceeds the query reply | |
634 | * 3) do a read modified to get the query reply | |
635 | * To make things worse we have to cope with intervention | |
636 | * required (3270 device switched to 'stand-by') and command | |
637 | * rejects (old devices that can't do 'read partition'). | |
638 | */ | |
132fab13 MS |
639 | memset(&rp->init_request, 0, sizeof(rp->init_request)); |
640 | memset(&rp->init_data, 0, 256); | |
641 | /* Store 'read partition' data stream to init_data */ | |
642 | memcpy(&rp->init_data, wbuf, sizeof(wbuf)); | |
643 | INIT_LIST_HEAD(&rp->init_request.list); | |
644 | rp->init_request.ccw.cmd_code = TC_WRITESF; | |
645 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
646 | rp->init_request.ccw.count = sizeof(wbuf); | |
647 | rp->init_request.ccw.cda = (__u32) __pa(&rp->init_data); | |
648 | ||
649 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); | |
3863e724 | 650 | if (rc) |
1da177e4 | 651 | /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ |
1da177e4 | 652 | return rc; |
1da177e4 LT |
653 | |
654 | /* Wait for attention interrupt. */ | |
655 | #ifdef CONFIG_TN3270_CONSOLE | |
656 | if (raw3270_registered == 0) { | |
657 | unsigned long flags; | |
658 | ||
659 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
660 | while (!test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)) | |
661 | wait_cons_dev(); | |
662 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
663 | } else | |
664 | #endif | |
665 | rc = wait_event_interruptible(raw3270_wait_queue, | |
666 | test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)); | |
667 | if (rc) | |
668 | return rc; | |
669 | ||
670 | /* | |
671 | * The device accepted the 'read partition' command. Now | |
672 | * set up a read ccw and issue it. | |
673 | */ | |
132fab13 MS |
674 | rp->init_request.ccw.cmd_code = TC_READMOD; |
675 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
676 | rp->init_request.ccw.count = sizeof(rp->init_data); | |
677 | rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); | |
678 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); | |
1da177e4 LT |
679 | if (rc) |
680 | return rc; | |
681 | /* Got a Query Reply */ | |
132fab13 MS |
682 | count = sizeof(rp->init_data) - rp->init_request.rescnt; |
683 | uap = (struct raw3270_ua *) (rp->init_data + 1); | |
1da177e4 | 684 | /* Paranoia check. */ |
132fab13 | 685 | if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) |
1da177e4 LT |
686 | return -EOPNOTSUPP; |
687 | /* Copy rows/columns of default Usable Area */ | |
688 | rp->rows = uap->uab.h; | |
689 | rp->cols = uap->uab.w; | |
690 | /* Check for 14 bit addressing */ | |
691 | if ((uap->uab.flags0 & 0x0d) == 0x01) | |
692 | set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); | |
693 | /* Check for Alternate Usable Area */ | |
694 | if (uap->uab.l == sizeof(struct raw3270_ua) && | |
695 | uap->aua.sdpid == 0x02) { | |
696 | rp->rows = uap->aua.hauai; | |
697 | rp->cols = uap->aua.wauai; | |
698 | } | |
699 | return 0; | |
700 | } | |
701 | ||
702 | static int | |
703 | raw3270_size_device(struct raw3270 *rp) | |
704 | { | |
705 | int rc; | |
706 | ||
d330f935 | 707 | mutex_lock(&raw3270_init_mutex); |
1da177e4 LT |
708 | rp->view = &raw3270_init_view; |
709 | raw3270_init_view.dev = rp; | |
3863e724 MS |
710 | if (MACHINE_IS_VM) |
711 | rc = __raw3270_size_device_vm(rp); | |
712 | else | |
713 | rc = __raw3270_size_device(rp); | |
d2c993d8 HC |
714 | raw3270_init_view.dev = NULL; |
715 | rp->view = NULL; | |
d330f935 | 716 | mutex_unlock(&raw3270_init_mutex); |
1da177e4 LT |
717 | if (rc == 0) { /* Found something. */ |
718 | /* Try to find a model. */ | |
719 | rp->model = 0; | |
720 | if (rp->rows == 24 && rp->cols == 80) | |
721 | rp->model = 2; | |
722 | if (rp->rows == 32 && rp->cols == 80) | |
723 | rp->model = 3; | |
724 | if (rp->rows == 43 && rp->cols == 80) | |
725 | rp->model = 4; | |
726 | if (rp->rows == 27 && rp->cols == 132) | |
727 | rp->model = 5; | |
3863e724 MS |
728 | } else { |
729 | /* Couldn't detect size. Use default model 2. */ | |
730 | rp->model = 2; | |
731 | rp->rows = 24; | |
732 | rp->cols = 80; | |
733 | return 0; | |
1da177e4 LT |
734 | } |
735 | return rc; | |
736 | } | |
737 | ||
738 | static int | |
739 | raw3270_reset_device(struct raw3270 *rp) | |
740 | { | |
741 | int rc; | |
742 | ||
d330f935 | 743 | mutex_lock(&raw3270_init_mutex); |
132fab13 MS |
744 | memset(&rp->init_request, 0, sizeof(rp->init_request)); |
745 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
746 | /* Store reset data stream to init_data/init_request */ | |
747 | rp->init_data[0] = TW_KR; | |
748 | INIT_LIST_HEAD(&rp->init_request.list); | |
749 | rp->init_request.ccw.cmd_code = TC_EWRITEA; | |
750 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
751 | rp->init_request.ccw.count = 1; | |
752 | rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); | |
1da177e4 LT |
753 | rp->view = &raw3270_init_view; |
754 | raw3270_init_view.dev = rp; | |
132fab13 | 755 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); |
d2c993d8 HC |
756 | raw3270_init_view.dev = NULL; |
757 | rp->view = NULL; | |
d330f935 | 758 | mutex_unlock(&raw3270_init_mutex); |
1da177e4 LT |
759 | return rc; |
760 | } | |
761 | ||
ed3cb6f0 RH |
762 | int |
763 | raw3270_reset(struct raw3270_view *view) | |
764 | { | |
765 | struct raw3270 *rp; | |
766 | int rc; | |
767 | ||
768 | rp = view->dev; | |
4b214a0c MS |
769 | if (!rp || rp->view != view || |
770 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 RH |
771 | rc = -EACCES; |
772 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
773 | rc = -ENODEV; | |
774 | else | |
775 | rc = raw3270_reset_device(view->dev); | |
776 | return rc; | |
777 | } | |
778 | ||
1da177e4 LT |
779 | /* |
780 | * Setup new 3270 device. | |
781 | */ | |
782 | static int | |
783 | raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) | |
784 | { | |
785 | struct list_head *l; | |
786 | struct raw3270 *tmp; | |
787 | int minor; | |
788 | ||
789 | memset(rp, 0, sizeof(struct raw3270)); | |
790 | /* Copy ebcdic -> ascii translation table. */ | |
791 | memcpy(ascebc, _ascebc, 256); | |
792 | if (tubxcorrect) { | |
793 | /* correct brackets and circumflex */ | |
794 | ascebc['['] = 0xad; | |
795 | ascebc[']'] = 0xbd; | |
796 | ascebc['^'] = 0xb0; | |
797 | } | |
798 | rp->ascebc = ascebc; | |
799 | ||
800 | /* Set defaults. */ | |
801 | rp->rows = 24; | |
802 | rp->cols = 80; | |
803 | ||
804 | INIT_LIST_HEAD(&rp->req_queue); | |
805 | INIT_LIST_HEAD(&rp->view_list); | |
806 | ||
807 | /* | |
808 | * Add device to list and find the smallest unused minor | |
ed3cb6f0 RH |
809 | * number for it. Note: there is no device with minor 0, |
810 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 811 | */ |
14cc3e2b | 812 | mutex_lock(&raw3270_mutex); |
1da177e4 | 813 | /* Keep the list sorted. */ |
ed3cb6f0 | 814 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
815 | rp->minor = -1; |
816 | list_for_each(l, &raw3270_devices) { | |
817 | tmp = list_entry(l, struct raw3270, list); | |
818 | if (tmp->minor > minor) { | |
819 | rp->minor = minor; | |
820 | __list_add(&rp->list, l->prev, l); | |
821 | break; | |
822 | } | |
823 | minor++; | |
824 | } | |
ed3cb6f0 | 825 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
826 | rp->minor = minor; |
827 | list_add_tail(&rp->list, &raw3270_devices); | |
828 | } | |
14cc3e2b | 829 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
830 | /* No free minor number? Then give up. */ |
831 | if (rp->minor == -1) | |
832 | return -EUSERS; | |
833 | rp->cdev = cdev; | |
834 | cdev->dev.driver_data = rp; | |
835 | cdev->handler = raw3270_irq; | |
836 | return 0; | |
837 | } | |
838 | ||
839 | #ifdef CONFIG_TN3270_CONSOLE | |
840 | /* | |
841 | * Setup 3270 device configured as console. | |
842 | */ | |
e62133b4 | 843 | struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) |
1da177e4 LT |
844 | { |
845 | struct raw3270 *rp; | |
846 | char *ascebc; | |
847 | int rc; | |
848 | ||
132fab13 | 849 | rp = (struct raw3270 *) alloc_bootmem_low(sizeof(struct raw3270)); |
1da177e4 LT |
850 | ascebc = (char *) alloc_bootmem(256); |
851 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
852 | if (rc) | |
853 | return ERR_PTR(rc); | |
854 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
855 | rc = raw3270_reset_device(rp); | |
856 | if (rc) | |
857 | return ERR_PTR(rc); | |
858 | rc = raw3270_size_device(rp); | |
859 | if (rc) | |
860 | return ERR_PTR(rc); | |
861 | rc = raw3270_reset_device(rp); | |
862 | if (rc) | |
863 | return ERR_PTR(rc); | |
864 | set_bit(RAW3270_FLAGS_READY, &rp->flags); | |
865 | return rp; | |
866 | } | |
867 | ||
868 | void | |
869 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
870 | { | |
871 | unsigned long flags; | |
872 | ||
873 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
874 | wait_cons_dev(); | |
875 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
876 | } | |
877 | ||
878 | #endif | |
879 | ||
880 | /* | |
881 | * Create a 3270 device structure. | |
882 | */ | |
883 | static struct raw3270 * | |
884 | raw3270_create_device(struct ccw_device *cdev) | |
885 | { | |
886 | struct raw3270 *rp; | |
887 | char *ascebc; | |
888 | int rc; | |
889 | ||
132fab13 | 890 | rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
891 | if (!rp) |
892 | return ERR_PTR(-ENOMEM); | |
893 | ascebc = kmalloc(256, GFP_KERNEL); | |
894 | if (!ascebc) { | |
895 | kfree(rp); | |
896 | return ERR_PTR(-ENOMEM); | |
897 | } | |
898 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
899 | if (rc) { | |
900 | kfree(rp->ascebc); | |
901 | kfree(rp); | |
902 | rp = ERR_PTR(rc); | |
903 | } | |
904 | /* Get reference to ccw_device structure. */ | |
905 | get_device(&cdev->dev); | |
906 | return rp; | |
907 | } | |
908 | ||
909 | /* | |
910 | * Activate a view. | |
911 | */ | |
912 | int | |
913 | raw3270_activate_view(struct raw3270_view *view) | |
914 | { | |
915 | struct raw3270 *rp; | |
916 | struct raw3270_view *oldview, *nv; | |
917 | unsigned long flags; | |
918 | int rc; | |
919 | ||
920 | rp = view->dev; | |
921 | if (!rp) | |
922 | return -ENODEV; | |
923 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
924 | if (rp->view == view) | |
925 | rc = 0; | |
926 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
927 | rc = -ENODEV; | |
4b214a0c MS |
928 | else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
929 | rc = -EACCES; | |
1da177e4 | 930 | else { |
d2c993d8 | 931 | oldview = NULL; |
1da177e4 LT |
932 | if (rp->view) { |
933 | oldview = rp->view; | |
934 | oldview->fn->deactivate(oldview); | |
935 | } | |
936 | rp->view = view; | |
937 | rc = view->fn->activate(view); | |
938 | if (rc) { | |
939 | /* Didn't work. Try to reactivate the old view. */ | |
940 | rp->view = oldview; | |
941 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
942 | /* Didn't work as well. Try any other view. */ | |
943 | list_for_each_entry(nv, &rp->view_list, list) | |
944 | if (nv != view && nv != oldview) { | |
945 | rp->view = nv; | |
946 | if (nv->fn->activate(nv) == 0) | |
947 | break; | |
d2c993d8 | 948 | rp->view = NULL; |
1da177e4 LT |
949 | } |
950 | } | |
951 | } | |
952 | } | |
953 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
954 | return rc; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Deactivate current view. | |
959 | */ | |
960 | void | |
961 | raw3270_deactivate_view(struct raw3270_view *view) | |
962 | { | |
963 | unsigned long flags; | |
964 | struct raw3270 *rp; | |
965 | ||
966 | rp = view->dev; | |
967 | if (!rp) | |
968 | return; | |
969 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
970 | if (rp->view == view) { | |
971 | view->fn->deactivate(view); | |
d2c993d8 | 972 | rp->view = NULL; |
1da177e4 LT |
973 | /* Move deactivated view to end of list. */ |
974 | list_del_init(&view->list); | |
975 | list_add_tail(&view->list, &rp->view_list); | |
976 | /* Try to activate another view. */ | |
4b214a0c MS |
977 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags) && |
978 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { | |
ed3cb6f0 RH |
979 | list_for_each_entry(view, &rp->view_list, list) { |
980 | rp->view = view; | |
981 | if (view->fn->activate(view) == 0) | |
1da177e4 | 982 | break; |
d2c993d8 | 983 | rp->view = NULL; |
ed3cb6f0 | 984 | } |
1da177e4 LT |
985 | } |
986 | } | |
987 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
988 | } | |
989 | ||
990 | /* | |
991 | * Add view to device with minor "minor". | |
992 | */ | |
993 | int | |
994 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) | |
995 | { | |
996 | unsigned long flags; | |
997 | struct raw3270 *rp; | |
998 | int rc; | |
999 | ||
ed3cb6f0 RH |
1000 | if (minor <= 0) |
1001 | return -ENODEV; | |
14cc3e2b | 1002 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1003 | rc = -ENODEV; |
1004 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1005 | if (rp->minor != minor) | |
1006 | continue; | |
1007 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1008 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1009 | atomic_set(&view->ref_count, 2); | |
1010 | view->dev = rp; | |
1011 | view->fn = fn; | |
1012 | view->model = rp->model; | |
1013 | view->rows = rp->rows; | |
1014 | view->cols = rp->cols; | |
1015 | view->ascebc = rp->ascebc; | |
1016 | spin_lock_init(&view->lock); | |
ed3cb6f0 | 1017 | list_add(&view->list, &rp->view_list); |
1da177e4 LT |
1018 | rc = 0; |
1019 | } | |
1020 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1021 | break; | |
1022 | } | |
14cc3e2b | 1023 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1024 | return rc; |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Find specific view of device with minor "minor". | |
1029 | */ | |
1030 | struct raw3270_view * | |
1031 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
1032 | { | |
1033 | struct raw3270 *rp; | |
1034 | struct raw3270_view *view, *tmp; | |
1035 | unsigned long flags; | |
1036 | ||
14cc3e2b | 1037 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1038 | view = ERR_PTR(-ENODEV); |
1039 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1040 | if (rp->minor != minor) | |
1041 | continue; | |
1042 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1043 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1044 | view = ERR_PTR(-ENOENT); | |
1045 | list_for_each_entry(tmp, &rp->view_list, list) { | |
1046 | if (tmp->fn == fn) { | |
1047 | raw3270_get_view(tmp); | |
1048 | view = tmp; | |
1049 | break; | |
1050 | } | |
1051 | } | |
1052 | } | |
1053 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1054 | break; | |
1055 | } | |
14cc3e2b | 1056 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1057 | return view; |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * Remove view from device and free view structure via call to view->fn->free. | |
1062 | */ | |
1063 | void | |
1064 | raw3270_del_view(struct raw3270_view *view) | |
1065 | { | |
1066 | unsigned long flags; | |
1067 | struct raw3270 *rp; | |
1068 | struct raw3270_view *nv; | |
1069 | ||
1070 | rp = view->dev; | |
1071 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1072 | if (rp->view == view) { | |
1073 | view->fn->deactivate(view); | |
d2c993d8 | 1074 | rp->view = NULL; |
1da177e4 LT |
1075 | } |
1076 | list_del_init(&view->list); | |
4b214a0c MS |
1077 | if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags) && |
1078 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { | |
1da177e4 LT |
1079 | /* Try to activate another view. */ |
1080 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 1081 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
1082 | rp->view = nv; |
1083 | break; | |
1084 | } | |
1085 | } | |
1086 | } | |
1087 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1088 | /* Wait for reference counter to drop to zero. */ | |
1089 | atomic_dec(&view->ref_count); | |
1090 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1091 | if (view->fn->free) | |
1092 | view->fn->free(view); | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * Remove a 3270 device structure. | |
1097 | */ | |
1098 | static void | |
1099 | raw3270_delete_device(struct raw3270 *rp) | |
1100 | { | |
1101 | struct ccw_device *cdev; | |
1102 | ||
1103 | /* Remove from device chain. */ | |
14cc3e2b | 1104 | mutex_lock(&raw3270_mutex); |
d7cf0d57 | 1105 | if (rp->clttydev && !IS_ERR(rp->clttydev)) |
7f021ce1 | 1106 | device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); |
d7cf0d57 | 1107 | if (rp->cltubdev && !IS_ERR(rp->cltubdev)) |
7f021ce1 | 1108 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, rp->minor)); |
1da177e4 | 1109 | list_del_init(&rp->list); |
14cc3e2b | 1110 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1111 | |
1112 | /* Disconnect from ccw_device. */ | |
1113 | cdev = rp->cdev; | |
d2c993d8 HC |
1114 | rp->cdev = NULL; |
1115 | cdev->dev.driver_data = NULL; | |
1116 | cdev->handler = NULL; | |
1da177e4 LT |
1117 | |
1118 | /* Put ccw_device structure. */ | |
1119 | put_device(&cdev->dev); | |
1120 | ||
1121 | /* Now free raw3270 structure. */ | |
1122 | kfree(rp->ascebc); | |
1123 | kfree(rp); | |
1124 | } | |
1125 | ||
1126 | static int | |
1127 | raw3270_probe (struct ccw_device *cdev) | |
1128 | { | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | /* | |
1133 | * Additional attributes for a 3270 device | |
1134 | */ | |
1135 | static ssize_t | |
3fd3c0a5 | 1136 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1137 | { |
1138 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
1139 | ((struct raw3270 *) dev->driver_data)->model); | |
1140 | } | |
d2c993d8 | 1141 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1142 | |
1143 | static ssize_t | |
3fd3c0a5 | 1144 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1145 | { |
1146 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
1147 | ((struct raw3270 *) dev->driver_data)->rows); | |
1148 | } | |
d2c993d8 | 1149 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1150 | |
1151 | static ssize_t | |
3fd3c0a5 | 1152 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1153 | { |
1154 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
1155 | ((struct raw3270 *) dev->driver_data)->cols); | |
1156 | } | |
d2c993d8 | 1157 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1158 | |
1159 | static struct attribute * raw3270_attrs[] = { | |
1160 | &dev_attr_model.attr, | |
1161 | &dev_attr_rows.attr, | |
1162 | &dev_attr_columns.attr, | |
1163 | NULL, | |
1164 | }; | |
1165 | ||
1166 | static struct attribute_group raw3270_attr_group = { | |
1167 | .attrs = raw3270_attrs, | |
1168 | }; | |
1169 | ||
d7cf0d57 | 1170 | static int raw3270_create_attributes(struct raw3270 *rp) |
1da177e4 | 1171 | { |
d7cf0d57 HC |
1172 | int rc; |
1173 | ||
1174 | rc = sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
1175 | if (rc) | |
1176 | goto out; | |
1177 | ||
ea9e42f6 GKH |
1178 | rp->clttydev = device_create(class3270, &rp->cdev->dev, |
1179 | MKDEV(IBM_TTY3270_MAJOR, rp->minor), NULL, | |
1180 | "tty%s", dev_name(&rp->cdev->dev)); | |
d7cf0d57 HC |
1181 | if (IS_ERR(rp->clttydev)) { |
1182 | rc = PTR_ERR(rp->clttydev); | |
1183 | goto out_ttydev; | |
1184 | } | |
1185 | ||
ea9e42f6 GKH |
1186 | rp->cltubdev = device_create(class3270, &rp->cdev->dev, |
1187 | MKDEV(IBM_FS3270_MAJOR, rp->minor), NULL, | |
1188 | "tub%s", dev_name(&rp->cdev->dev)); | |
d7cf0d57 HC |
1189 | if (!IS_ERR(rp->cltubdev)) |
1190 | goto out; | |
1191 | ||
1192 | rc = PTR_ERR(rp->cltubdev); | |
7f021ce1 | 1193 | device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); |
d7cf0d57 HC |
1194 | |
1195 | out_ttydev: | |
1196 | sysfs_remove_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
1197 | out: | |
1198 | return rc; | |
1da177e4 LT |
1199 | } |
1200 | ||
1201 | /* | |
1202 | * Notifier for device addition/removal | |
1203 | */ | |
1204 | struct raw3270_notifier { | |
1205 | struct list_head list; | |
1206 | void (*notifier)(int, int); | |
1207 | }; | |
1208 | ||
c11ca97e | 1209 | static LIST_HEAD(raw3270_notifier); |
1da177e4 LT |
1210 | |
1211 | int raw3270_register_notifier(void (*notifier)(int, int)) | |
1212 | { | |
1213 | struct raw3270_notifier *np; | |
1214 | struct raw3270 *rp; | |
1215 | ||
1216 | np = kmalloc(sizeof(struct raw3270_notifier), GFP_KERNEL); | |
1217 | if (!np) | |
1218 | return -ENOMEM; | |
1219 | np->notifier = notifier; | |
14cc3e2b | 1220 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1221 | list_add_tail(&np->list, &raw3270_notifier); |
1222 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1223 | get_device(&rp->cdev->dev); | |
1224 | notifier(rp->minor, 1); | |
1225 | } | |
14cc3e2b | 1226 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1227 | return 0; |
1228 | } | |
1229 | ||
1230 | void raw3270_unregister_notifier(void (*notifier)(int, int)) | |
1231 | { | |
1232 | struct raw3270_notifier *np; | |
1233 | ||
14cc3e2b | 1234 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1235 | list_for_each_entry(np, &raw3270_notifier, list) |
1236 | if (np->notifier == notifier) { | |
1237 | list_del(&np->list); | |
1238 | kfree(np); | |
1239 | break; | |
1240 | } | |
14cc3e2b | 1241 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | /* | |
1245 | * Set 3270 device online. | |
1246 | */ | |
1247 | static int | |
1248 | raw3270_set_online (struct ccw_device *cdev) | |
1249 | { | |
1250 | struct raw3270 *rp; | |
1251 | struct raw3270_notifier *np; | |
1252 | int rc; | |
1253 | ||
1254 | rp = raw3270_create_device(cdev); | |
1255 | if (IS_ERR(rp)) | |
1256 | return PTR_ERR(rp); | |
1257 | rc = raw3270_reset_device(rp); | |
1258 | if (rc) | |
ed3cb6f0 | 1259 | goto failure; |
1da177e4 LT |
1260 | rc = raw3270_size_device(rp); |
1261 | if (rc) | |
ed3cb6f0 | 1262 | goto failure; |
1da177e4 LT |
1263 | rc = raw3270_reset_device(rp); |
1264 | if (rc) | |
ed3cb6f0 | 1265 | goto failure; |
d7cf0d57 HC |
1266 | rc = raw3270_create_attributes(rp); |
1267 | if (rc) | |
1268 | goto failure; | |
1da177e4 | 1269 | set_bit(RAW3270_FLAGS_READY, &rp->flags); |
14cc3e2b | 1270 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1271 | list_for_each_entry(np, &raw3270_notifier, list) |
1272 | np->notifier(rp->minor, 1); | |
14cc3e2b | 1273 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1274 | return 0; |
ed3cb6f0 RH |
1275 | |
1276 | failure: | |
1277 | raw3270_delete_device(rp); | |
1278 | return rc; | |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | /* | |
1282 | * Remove 3270 device structure. | |
1283 | */ | |
1284 | static void | |
1285 | raw3270_remove (struct ccw_device *cdev) | |
1286 | { | |
1287 | unsigned long flags; | |
1288 | struct raw3270 *rp; | |
1289 | struct raw3270_view *v; | |
1290 | struct raw3270_notifier *np; | |
1291 | ||
1292 | rp = cdev->dev.driver_data; | |
ed3cb6f0 RH |
1293 | /* |
1294 | * _remove is the opposite of _probe; it's probe that | |
1295 | * should set up rp. raw3270_remove gets entered for | |
1296 | * devices even if they haven't been varied online. | |
1297 | * Thus, rp may validly be NULL here. | |
1298 | */ | |
1299 | if (rp == NULL) | |
1300 | return; | |
1da177e4 LT |
1301 | clear_bit(RAW3270_FLAGS_READY, &rp->flags); |
1302 | ||
1303 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1304 | ||
1305 | /* Deactivate current view and remove all views. */ | |
1306 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1307 | if (rp->view) { | |
1308 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1309 | rp->view = NULL; |
1da177e4 LT |
1310 | } |
1311 | while (!list_empty(&rp->view_list)) { | |
1312 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1313 | if (v->fn->release) | |
1314 | v->fn->release(v); | |
1315 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1316 | raw3270_del_view(v); | |
1317 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1318 | } | |
1319 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1320 | ||
14cc3e2b | 1321 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1322 | list_for_each_entry(np, &raw3270_notifier, list) |
1323 | np->notifier(rp->minor, 0); | |
14cc3e2b | 1324 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1325 | |
1326 | /* Reset 3270 device. */ | |
1327 | raw3270_reset_device(rp); | |
1328 | /* And finally remove it. */ | |
1329 | raw3270_delete_device(rp); | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | * Set 3270 device offline. | |
1334 | */ | |
1335 | static int | |
1336 | raw3270_set_offline (struct ccw_device *cdev) | |
1337 | { | |
1338 | struct raw3270 *rp; | |
1339 | ||
1340 | rp = cdev->dev.driver_data; | |
1341 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) | |
1342 | return -EBUSY; | |
1343 | raw3270_remove(cdev); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
4b214a0c MS |
1347 | static int raw3270_pm_stop(struct ccw_device *cdev) |
1348 | { | |
1349 | struct raw3270 *rp; | |
1350 | struct raw3270_view *view; | |
1351 | unsigned long flags; | |
1352 | ||
1353 | rp = cdev->dev.driver_data; | |
1354 | if (!rp) | |
1355 | return 0; | |
1356 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1357 | if (rp->view) | |
1358 | rp->view->fn->deactivate(rp->view); | |
1359 | if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { | |
1360 | /* | |
1361 | * Release tty and fullscreen for all non-console | |
1362 | * devices. | |
1363 | */ | |
1364 | list_for_each_entry(view, &rp->view_list, list) { | |
1365 | if (view->fn->release) | |
1366 | view->fn->release(view); | |
1367 | } | |
1368 | } | |
1369 | set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1370 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int raw3270_pm_start(struct ccw_device *cdev) | |
1375 | { | |
1376 | struct raw3270 *rp; | |
1377 | unsigned long flags; | |
1378 | ||
1379 | rp = cdev->dev.driver_data; | |
1380 | if (!rp) | |
1381 | return 0; | |
1382 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1383 | clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1384 | if (rp->view) | |
1385 | rp->view->fn->activate(rp->view); | |
1386 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | void raw3270_pm_unfreeze(struct raw3270_view *view) | |
1391 | { | |
1392 | struct raw3270 *rp; | |
1393 | ||
1394 | rp = view->dev; | |
1395 | if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1396 | ccw_device_force_console(); | |
1397 | } | |
1398 | ||
1da177e4 LT |
1399 | static struct ccw_device_id raw3270_id[] = { |
1400 | { CCW_DEVICE(0x3270, 0) }, | |
1401 | { CCW_DEVICE(0x3271, 0) }, | |
1402 | { CCW_DEVICE(0x3272, 0) }, | |
1403 | { CCW_DEVICE(0x3273, 0) }, | |
1404 | { CCW_DEVICE(0x3274, 0) }, | |
1405 | { CCW_DEVICE(0x3275, 0) }, | |
1406 | { CCW_DEVICE(0x3276, 0) }, | |
1407 | { CCW_DEVICE(0x3277, 0) }, | |
1408 | { CCW_DEVICE(0x3278, 0) }, | |
1409 | { CCW_DEVICE(0x3279, 0) }, | |
1410 | { CCW_DEVICE(0x3174, 0) }, | |
1411 | { /* end of list */ }, | |
1412 | }; | |
1413 | ||
1414 | static struct ccw_driver raw3270_ccw_driver = { | |
1415 | .name = "3270", | |
1416 | .owner = THIS_MODULE, | |
1417 | .ids = raw3270_id, | |
1418 | .probe = &raw3270_probe, | |
1419 | .remove = &raw3270_remove, | |
1420 | .set_online = &raw3270_set_online, | |
1421 | .set_offline = &raw3270_set_offline, | |
4b214a0c MS |
1422 | .freeze = &raw3270_pm_stop, |
1423 | .thaw = &raw3270_pm_start, | |
1424 | .restore = &raw3270_pm_start, | |
1da177e4 LT |
1425 | }; |
1426 | ||
1427 | static int | |
1428 | raw3270_init(void) | |
1429 | { | |
1430 | struct raw3270 *rp; | |
1431 | int rc; | |
1432 | ||
1433 | if (raw3270_registered) | |
1434 | return 0; | |
1435 | raw3270_registered = 1; | |
1436 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1437 | if (rc == 0) { | |
1438 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1439 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1440 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1441 | list_for_each_entry(rp, &raw3270_devices, list) { |
1442 | get_device(&rp->cdev->dev); | |
1443 | raw3270_create_attributes(rp); | |
1444 | } | |
14cc3e2b | 1445 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1446 | } |
1447 | return rc; | |
1448 | } | |
1449 | ||
1450 | static void | |
1451 | raw3270_exit(void) | |
1452 | { | |
1453 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1454 | class_destroy(class3270); |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | MODULE_LICENSE("GPL"); | |
1458 | ||
1459 | module_init(raw3270_init); | |
1460 | module_exit(raw3270_exit); | |
1461 | ||
1462 | EXPORT_SYMBOL(raw3270_request_alloc); | |
1463 | EXPORT_SYMBOL(raw3270_request_free); | |
1464 | EXPORT_SYMBOL(raw3270_request_reset); | |
1465 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1466 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1467 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1468 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1469 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1470 | EXPORT_SYMBOL(raw3270_add_view); | |
1471 | EXPORT_SYMBOL(raw3270_del_view); | |
1472 | EXPORT_SYMBOL(raw3270_find_view); | |
1473 | EXPORT_SYMBOL(raw3270_activate_view); | |
1474 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1475 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1476 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1477 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1478 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1479 | EXPORT_SYMBOL(raw3270_register_notifier); |
1480 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1481 | EXPORT_SYMBOL(raw3270_wait_queue); |