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Merge branch 'perf-core-for-mingo' into perf/urgent
[linux-2.6-block.git] / drivers / s390 / char / raw3270.c
CommitLineData
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
c95571e6 31struct class *class3270;
ed3cb6f0 32
1da177e4
LT		 33/* The main 3270 data structure. */
34struct raw3270 {
35 struct list_head list;
36 struct ccw_device *cdev;
37 int minor;
38
39 short model, rows, cols;
4d334fd1 40 unsigned int state;
1da177e4
LT		 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 */
132fab13 50
4d334fd1
MS		 51 struct raw3270_view init_view;
52 struct raw3270_request init_reset;
53 struct raw3270_request init_readpart;
54 struct raw3270_request init_readmod;
132fab13 55 unsigned char init_data[256];
1da177e4
LT		 56};
57
4d334fd1
MS		 58/* raw3270->state */
59#define RAW3270_STATE_INIT 0 /* Initial state */
60#define RAW3270_STATE_RESET 1 /* Reset command is pending */
61#define RAW3270_STATE_W4ATTN 2 /* Wait for attention interrupt */
62#define RAW3270_STATE_READMOD 3 /* Read partition is pending */
63#define RAW3270_STATE_READY 4 /* Device is usable by views */
64
1da177e4
LT		 65/* raw3270->flags */
66#define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */
67#define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */
4d334fd1
MS		 68#define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */
69#define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */
1da177e4
LT		 70
71/* Semaphore to protect global data of raw3270 (devices, views, etc). */
14cc3e2b 72static DEFINE_MUTEX(raw3270_mutex);
1da177e4
LT		 73
74/* List of 3270 devices. */
c11ca97e 75static LIST_HEAD(raw3270_devices);
1da177e4
LT		 76
77/*
78 * Flag to indicate if the driver has been registered. Some operations
79 * like waiting for the end of i/o need to be done differently as long
80 * as the kernel is still starting up (console support).
81 */
82static int raw3270_registered;
83
84/* Module parameters */
90ab5ee9 85static bool tubxcorrect = 0;
1da177e4
LT		 86module_param(tubxcorrect, bool, 0);
87
88/*
89 * Wait queue for device init/delete, view delete.
90 */
91DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue);
92
93/*
94 * Encode array for 12 bit 3270 addresses.
95 */
2b67fc46 96static unsigned char raw3270_ebcgraf[64] = {
1da177e4
LT		 97 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
98 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
99 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
100 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
101 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
102 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
103 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
104 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f
105};
106
4d334fd1
MS		 107static inline int raw3270_state_ready(struct raw3270 *rp)
108{
109 return rp->state == RAW3270_STATE_READY;
110}
111
112static inline int raw3270_state_final(struct raw3270 *rp)
113{
114 return rp->state == RAW3270_STATE_INIT ||
115 rp->state == RAW3270_STATE_READY;
116}
117
1da177e4
LT		 118void
119raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr)
120{
121 if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) {
122 cp[0] = (addr >> 8) & 0x3f;
123 cp[1] = addr & 0xff;
124 } else {
125 cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f];
126 cp[1] = raw3270_ebcgraf[addr & 0x3f];
127 }
128}
129
130/*
131 * Allocate a new 3270 ccw request
132 */
133struct raw3270_request *
134raw3270_request_alloc(size_t size)
135{
136 struct raw3270_request *rq;
137
138 /* Allocate request structure */
88abaab4 139 rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA);
1da177e4
LT		 140 if (!rq)
141 return ERR_PTR(-ENOMEM);
1da177e4
LT		 142
143 /* alloc output buffer. */
144 if (size > 0) {
145 rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA);
146 if (!rq->buffer) {
147 kfree(rq);
148 return ERR_PTR(-ENOMEM);
149 }
150 }
151 rq->size = size;
152 INIT_LIST_HEAD(&rq->list);
153
154 /*
155 * Setup ccw.
156 */
157 rq->ccw.cda = __pa(rq->buffer);
158 rq->ccw.flags = CCW_FLAG_SLI;
159
160 return rq;
161}
162
1da177e4
LT		 163/*
164 * Free 3270 ccw request
165 */
166void
167raw3270_request_free (struct raw3270_request *rq)
168{
17fd682e 169 kfree(rq->buffer);
1da177e4
LT		 170 kfree(rq);
171}
172
173/*
174 * Reset request to initial state.
175 */
176void
177raw3270_request_reset(struct raw3270_request *rq)
178{
179 BUG_ON(!list_empty(&rq->list));
180 rq->ccw.cmd_code = 0;
181 rq->ccw.count = 0;
182 rq->ccw.cda = __pa(rq->buffer);
183 rq->ccw.flags = CCW_FLAG_SLI;
184 rq->rescnt = 0;
185 rq->rc = 0;
186}
187
188/*
189 * Set command code to ccw of a request.
190 */
191void
192raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd)
193{
194 rq->ccw.cmd_code = cmd;
195}
196
197/*
198 * Add data fragment to output buffer.
199 */
200int
201raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size)
202{
203 if (size + rq->ccw.count > rq->size)
204 return -E2BIG;
205 memcpy(rq->buffer + rq->ccw.count, data, size);
206 rq->ccw.count += size;
207 return 0;
208}
209
210/*
211 * Set address/length pair to ccw of a request.
212 */
213void
214raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size)
215{
216 rq->ccw.cda = __pa(data);
217 rq->ccw.count = size;
218}
219
220/*
221 * Set idal buffer to ccw of a request.
222 */
223void
224raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib)
225{
226 rq->ccw.cda = __pa(ib->data);
227 rq->ccw.count = ib->size;
228 rq->ccw.flags |= CCW_FLAG_IDA;
229}
230
231/*
232 * Stop running ccw.
233 */
234static int
4d334fd1 235__raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq)
1da177e4
LT		 236{
237 int retries;
238 int rc;
239
240 if (raw3270_request_final(rq))
241 return 0;
242 /* Check if interrupt has already been processed */
243 for (retries = 0; retries < 5; retries++) {
244 if (retries < 2)
245 rc = ccw_device_halt(rp->cdev, (long) rq);
246 else
247 rc = ccw_device_clear(rp->cdev, (long) rq);
248 if (rc == 0)
249 break; /* termination successful */
250 }
251 return rc;
252}
253
1da177e4
LT		 254/*
255 * Add the request to the request queue, try to start it if the
256 * 3270 device is idle. Return without waiting for end of i/o.
257 */
258static int
259__raw3270_start(struct raw3270 *rp, struct raw3270_view *view,
260 struct raw3270_request *rq)
261{
262 rq->view = view;
263 raw3270_get_view(view);
264 if (list_empty(&rp->req_queue) &&
265 !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) {
266 /* No other requests are on the queue. Start this one. */
267 rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
268 (unsigned long) rq, 0, 0);
269 if (rq->rc) {
270 raw3270_put_view(view);
271 return rq->rc;
272 }
273 }
274 list_add_tail(&rq->list, &rp->req_queue);
275 return 0;
233faec9
MS		 276}
277
278int
279raw3270_view_active(struct raw3270_view *view)
280{
281 struct raw3270 *rp = view->dev;
282
283 return rp && rp->view == view &&
284 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
1da177e4
LT		 285}
286
287int
288raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
289{
290 unsigned long flags;
291 struct raw3270 *rp;
292 int rc;
293
294 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
295 rp = view->dev;
4b214a0c
MS		 296 if (!rp || rp->view != view ||
297 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
1da177e4 298 rc = -EACCES;
4d334fd1
MS		 299 else if (!raw3270_state_ready(rp))
300 rc = -EBUSY;
1da177e4
LT		 301 else
302 rc = __raw3270_start(rp, view, rq);
303 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags);
304 return rc;
305}
306
ed3cb6f0
RH		 307int
308raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
309{
310 struct raw3270 *rp;
311 int rc;
312
313 rp = view->dev;
4b214a0c
MS		 314 if (!rp || rp->view != view ||
315 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
ed3cb6f0 316 rc = -EACCES;
4d334fd1
MS		 317 else if (!raw3270_state_ready(rp))
318 rc = -EBUSY;
ed3cb6f0
RH		 319 else
320 rc = __raw3270_start(rp, view, rq);
321 return rc;
322}
323
1da177e4
LT		 324int
325raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
326{
327 struct raw3270 *rp;
328
329 rp = view->dev;
330 rq->view = view;
331 raw3270_get_view(view);
332 list_add_tail(&rq->list, &rp->req_queue);
333 return 0;
334}
335
336/*
337 * 3270 interrupt routine, called from the ccw_device layer
338 */
339static void
340raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
341{
342 struct raw3270 *rp;
343 struct raw3270_view *view;
344 struct raw3270_request *rq;
345 int rc;
346
dff59b64 347 rp = dev_get_drvdata(&cdev->dev);
1da177e4
LT		 348 if (!rp)
349 return;
350 rq = (struct raw3270_request *) intparm;
351 view = rq ? rq->view : rp->view;
352
353 if (IS_ERR(irb))
354 rc = RAW3270_IO_RETRY;
23d805b6 355 else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1da177e4
LT		 356 rq->rc = -EIO;
357 rc = RAW3270_IO_DONE;
23d805b6
PO		 358 } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END |
359 DEV_STAT_UNIT_EXCEP)) {
1da177e4
LT		 360 /* Handle CE-DE-UE and subsequent UDE */
361 set_bit(RAW3270_FLAGS_BUSY, &rp->flags);
362 rc = RAW3270_IO_BUSY;
363 } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) {
364 /* Wait for UDE if busy flag is set. */
23d805b6 365 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
1da177e4
LT		 366 clear_bit(RAW3270_FLAGS_BUSY, &rp->flags);
367 /* Got it, now retry. */
368 rc = RAW3270_IO_RETRY;
369 } else
370 rc = RAW3270_IO_BUSY;
371 } else if (view)
372 rc = view->fn->intv(view, rq, irb);
373 else
374 rc = RAW3270_IO_DONE;
375
376 switch (rc) {
377 case RAW3270_IO_DONE:
378 break;
379 case RAW3270_IO_BUSY:
380 /*
381 * Intervention required by the operator. We have to wait
382 * for unsolicited device end.
383 */
384 return;
385 case RAW3270_IO_RETRY:
386 if (!rq)
387 break;
388 rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
389 (unsigned long) rq, 0, 0);
390 if (rq->rc == 0)
3ad2f3fb 391 return; /* Successfully restarted. */
1da177e4
LT		 392 break;
393 case RAW3270_IO_STOP:
394 if (!rq)
395 break;
4d334fd1 396 __raw3270_halt_io(rp, rq);
1da177e4
LT		 397 rq->rc = -EIO;
398 break;
399 default:
400 BUG();
401 }
402 if (rq) {
403 BUG_ON(list_empty(&rq->list));
404 /* The request completed, remove from queue and do callback. */
405 list_del_init(&rq->list);
406 if (rq->callback)
407 rq->callback(rq, rq->callback_data);
408 /* Do put_device for get_device in raw3270_start. */
409 raw3270_put_view(view);
410 }
411 /*
412 * Try to start each request on request queue until one is
413 * started successful.
414 */
415 while (!list_empty(&rp->req_queue)) {
416 rq = list_entry(rp->req_queue.next,struct raw3270_request,list);
417 rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
418 (unsigned long) rq, 0, 0);
419 if (rq->rc == 0)
420 break;
421 /* Start failed. Remove request and do callback. */
422 list_del_init(&rq->list);
423 if (rq->callback)
424 rq->callback(rq, rq->callback_data);
425 /* Do put_device for get_device in raw3270_start. */
426 raw3270_put_view(view);
427 }
428}
429
430/*
4d334fd1
MS		 431 * To determine the size of the 3270 device we need to do:
432 * 1) send a 'read partition' data stream to the device
433 * 2) wait for the attn interrupt that precedes the query reply
434 * 3) do a read modified to get the query reply
435 * To make things worse we have to cope with intervention
436 * required (3270 device switched to 'stand-by') and command
437 * rejects (old devices that can't do 'read partition').
1da177e4 438 */
1da177e4
LT		 439struct raw3270_ua { /* Query Reply structure for Usable Area */
440 struct { /* Usable Area Query Reply Base */
441 short l; /* Length of this structured field */
442 char sfid; /* 0x81 if Query Reply */
443 char qcode; /* 0x81 if Usable Area */
444 char flags0;
445 char flags1;
446 short w; /* Width of usable area */
447 short h; /* Heigth of usavle area */
448 char units; /* 0x00:in; 0x01:mm */
449 int xr;
450 int yr;
451 char aw;
452 char ah;
453 short buffsz; /* Character buffer size, bytes */
454 char xmin;
455 char ymin;
456 char xmax;
457 char ymax;
458 } __attribute__ ((packed)) uab;
459 struct { /* Alternate Usable Area Self-Defining Parameter */
460 char l; /* Length of this Self-Defining Parm */
461 char sdpid; /* 0x02 if Alternate Usable Area */
462 char res;
463 char auaid; /* 0x01 is Id for the A U A */
464 short wauai; /* Width of AUAi */
465 short hauai; /* Height of AUAi */
466 char auaunits; /* 0x00:in, 0x01:mm */
467 int auaxr;
468 int auayr;
469 char awauai;
470 char ahauai;
471 } __attribute__ ((packed)) aua;
472} __attribute__ ((packed));
473
1da177e4 474static void
4d334fd1 475raw3270_size_device_vm(struct raw3270 *rp)
1da177e4
LT		 476{
477 int rc, model;
9a92fe48 478 struct ccw_dev_id dev_id;
4d334fd1 479 struct diag210 diag_data;
1da177e4 480
9a92fe48 481 ccw_device_get_id(rp->cdev, &dev_id);
4d334fd1
MS		 482 diag_data.vrdcdvno = dev_id.devno;
483 diag_data.vrdclen = sizeof(struct diag210);
484 rc = diag210(&diag_data);
485 model = diag_data.vrdccrmd;
486 /* Use default model 2 if the size could not be detected */
487 if (rc || model < 2 || model > 5)
488 model = 2;
1da177e4
LT		 489 switch (model) {
490 case 2:
491 rp->model = model;
492 rp->rows = 24;
493 rp->cols = 80;
494 break;
495 case 3:
496 rp->model = model;
497 rp->rows = 32;
498 rp->cols = 80;
499 break;
500 case 4:
501 rp->model = model;
502 rp->rows = 43;
503 rp->cols = 80;
504 break;
505 case 5:
506 rp->model = model;
507 rp->rows = 27;
508 rp->cols = 132;
509 break;
1da177e4 510 }
1da177e4
LT		 511}
512
4d334fd1
MS		 513static void
514raw3270_size_device(struct raw3270 *rp)
1da177e4 515{
1da177e4 516 struct raw3270_ua *uap;
1da177e4 517
1da177e4 518 /* Got a Query Reply */
132fab13 519 uap = (struct raw3270_ua *) (rp->init_data + 1);
1da177e4 520 /* Paranoia check. */
4d334fd1
MS		 521 if (rp->init_readmod.rc || rp->init_data[0] != 0x88 ||
522 uap->uab.qcode != 0x81) {
523 /* Couldn't detect size. Use default model 2. */
524 rp->model = 2;
525 rp->rows = 24;
526 rp->cols = 80;
527 return;
528 }
1da177e4
LT		 529 /* Copy rows/columns of default Usable Area */
530 rp->rows = uap->uab.h;
531 rp->cols = uap->uab.w;
532 /* Check for 14 bit addressing */
533 if ((uap->uab.flags0 & 0x0d) == 0x01)
534 set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags);
535 /* Check for Alternate Usable Area */
536 if (uap->uab.l == sizeof(struct raw3270_ua) &&
537 uap->aua.sdpid == 0x02) {
538 rp->rows = uap->aua.hauai;
539 rp->cols = uap->aua.wauai;
540 }
4d334fd1
MS		 541 /* Try to find a model. */
542 rp->model = 0;
543 if (rp->rows == 24 && rp->cols == 80)
544 rp->model = 2;
545 if (rp->rows == 32 && rp->cols == 80)
546 rp->model = 3;
547 if (rp->rows == 43 && rp->cols == 80)
548 rp->model = 4;
549 if (rp->rows == 27 && rp->cols == 132)
550 rp->model = 5;
1da177e4
LT		 551}
552
4d334fd1
MS		 553static void
554raw3270_size_device_done(struct raw3270 *rp)
1da177e4 555{
4d334fd1 556 struct raw3270_view *view;
1da177e4 557
d2c993d8 558 rp->view = NULL;
4d334fd1
MS		 559 rp->state = RAW3270_STATE_READY;
560 /* Notify views about new size */
561 list_for_each_entry(view, &rp->view_list, list)
562 if (view->fn->resize)
563 view->fn->resize(view, rp->model, rp->rows, rp->cols);
564 /* Setup processing done, now activate a view */
565 list_for_each_entry(view, &rp->view_list, list) {
566 rp->view = view;
567 if (view->fn->activate(view) == 0)
568 break;
569 rp->view = NULL;
1da177e4 570 }
4d334fd1
MS		 571}
572
573static void
574raw3270_read_modified_cb(struct raw3270_request *rq, void *data)
575{
576 struct raw3270 *rp = rq->view->dev;
577
578 raw3270_size_device(rp);
579 raw3270_size_device_done(rp);
580}
581
582static void
583raw3270_read_modified(struct raw3270 *rp)
584{
585 if (rp->state != RAW3270_STATE_W4ATTN)
586 return;
587 /* Use 'read modified' to get the result of a read partition. */
588 memset(&rp->init_readmod, 0, sizeof(rp->init_readmod));
589 memset(&rp->init_data, 0, sizeof(rp->init_data));
590 rp->init_readmod.ccw.cmd_code = TC_READMOD;
591 rp->init_readmod.ccw.flags = CCW_FLAG_SLI;
592 rp->init_readmod.ccw.count = sizeof(rp->init_data);
593 rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data);
594 rp->init_readmod.callback = raw3270_read_modified_cb;
595 rp->state = RAW3270_STATE_READMOD;
596 raw3270_start_irq(&rp->init_view, &rp->init_readmod);
597}
598
599static void
600raw3270_writesf_readpart(struct raw3270 *rp)
601{
602 static const unsigned char wbuf[] =
603 { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 };
604
605 /* Store 'read partition' data stream to init_data */
606 memset(&rp->init_readpart, 0, sizeof(rp->init_readpart));
607 memset(&rp->init_data, 0, sizeof(rp->init_data));
608 memcpy(&rp->init_data, wbuf, sizeof(wbuf));
609 rp->init_readpart.ccw.cmd_code = TC_WRITESF;
610 rp->init_readpart.ccw.flags = CCW_FLAG_SLI;
611 rp->init_readpart.ccw.count = sizeof(wbuf);
612 rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data);
613 rp->state = RAW3270_STATE_W4ATTN;
614 raw3270_start_irq(&rp->init_view, &rp->init_readpart);
615}
616
617/*
618 * Device reset
619 */
620static void
621raw3270_reset_device_cb(struct raw3270_request *rq, void *data)
622{
623 struct raw3270 *rp = rq->view->dev;
624
625 if (rp->state != RAW3270_STATE_RESET)
626 return;
dc3ac5ff 627 if (rq->rc) {
4d334fd1
MS		 628 /* Reset command failed. */
629 rp->state = RAW3270_STATE_INIT;
01a7cfa2 630 } else if (MACHINE_IS_VM) {
4d334fd1
MS		 631 raw3270_size_device_vm(rp);
632 raw3270_size_device_done(rp);
633 } else
634 raw3270_writesf_readpart(rp);
bd1cb5de
MS		 635 memset(&rp->init_reset, 0, sizeof(rp->init_reset));
636 memset(&rp->init_data, 0, sizeof(rp->init_data));
1da177e4
LT		 637}
638
639static int
4d334fd1 640__raw3270_reset_device(struct raw3270 *rp)
1da177e4
LT		 641{
642 int rc;
643
bd1cb5de
MS		 644 /* Check if reset is already pending */
645 if (rp->init_reset.view)
646 return -EBUSY;
4d334fd1 647 /* Store reset data stream to init_data/init_reset */
132fab13 648 rp->init_data[0] = TW_KR;
4d334fd1
MS		 649 rp->init_reset.ccw.cmd_code = TC_EWRITEA;
650 rp->init_reset.ccw.flags = CCW_FLAG_SLI;
651 rp->init_reset.ccw.count = 1;
652 rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data);
653 rp->init_reset.callback = raw3270_reset_device_cb;
654 rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset);
655 if (rc == 0 && rp->state == RAW3270_STATE_INIT)
656 rp->state = RAW3270_STATE_RESET;
657 return rc;
658}
659
660static int
661raw3270_reset_device(struct raw3270 *rp)
662{
663 unsigned long flags;
664 int rc;
665
666 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
667 rc = __raw3270_reset_device(rp);
668 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1da177e4
LT		 669 return rc;
670}
671
ed3cb6f0
RH		 672int
673raw3270_reset(struct raw3270_view *view)
674{
675 struct raw3270 *rp;
676 int rc;
677
678 rp = view->dev;
4b214a0c
MS		 679 if (!rp || rp->view != view ||
680 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
ed3cb6f0 681 rc = -EACCES;
4d334fd1
MS		 682 else if (!raw3270_state_ready(rp))
683 rc = -EBUSY;
ed3cb6f0
RH		 684 else
685 rc = raw3270_reset_device(view->dev);
686 return rc;
687}
688
4d334fd1
MS		 689static int
690raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq,
691 struct irb *irb)
692{
693 struct raw3270 *rp;
694
695 /*
696 * Unit-Check Processing:
697 * Expect Command Reject or Intervention Required.
698 */
699 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
700 /* Request finished abnormally. */
701 if (irb->ecw[0] & SNS0_INTERVENTION_REQ) {
702 set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags);
703 return RAW3270_IO_BUSY;
704 }
705 }
706 if (rq) {
707 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
708 if (irb->ecw[0] & SNS0_CMD_REJECT)
709 rq->rc = -EOPNOTSUPP;
710 else
711 rq->rc = -EIO;
712 }
713 }
714 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
715 /* Queue read modified after attention interrupt */
716 rp = view->dev;
717 raw3270_read_modified(rp);
718 }
719 return RAW3270_IO_DONE;
720}
721
722static struct raw3270_fn raw3270_init_fn = {
723 .intv = raw3270_init_irq
724};
725
1da177e4
LT		 726/*
727 * Setup new 3270 device.
728 */
729static int
730raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc)
731{
732 struct list_head *l;
733 struct raw3270 *tmp;
734 int minor;
735
736 memset(rp, 0, sizeof(struct raw3270));
737 /* Copy ebcdic -> ascii translation table. */
738 memcpy(ascebc, _ascebc, 256);
739 if (tubxcorrect) {
740 /* correct brackets and circumflex */
741 ascebc['['] = 0xad;
742 ascebc[']'] = 0xbd;
743 ascebc['^'] = 0xb0;
744 }
745 rp->ascebc = ascebc;
746
747 /* Set defaults. */
748 rp->rows = 24;
749 rp->cols = 80;
750
751 INIT_LIST_HEAD(&rp->req_queue);
752 INIT_LIST_HEAD(&rp->view_list);
753
4d334fd1
MS		 754 rp->init_view.dev = rp;
755 rp->init_view.fn = &raw3270_init_fn;
756 rp->view = &rp->init_view;
757
1da177e4
LT		 758 /*
759 * Add device to list and find the smallest unused minor
ed3cb6f0
RH		 760 * number for it. Note: there is no device with minor 0,
761 * see special case for fs3270.c:fs3270_open().
1da177e4 762 */
14cc3e2b 763 mutex_lock(&raw3270_mutex);
1da177e4 764 /* Keep the list sorted. */
ed3cb6f0 765 minor = RAW3270_FIRSTMINOR;
1da177e4
LT		 766 rp->minor = -1;
767 list_for_each(l, &raw3270_devices) {
768 tmp = list_entry(l, struct raw3270, list);
769 if (tmp->minor > minor) {
770 rp->minor = minor;
771 __list_add(&rp->list, l->prev, l);
772 break;
773 }
774 minor++;
775 }
ed3cb6f0 776 if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) {
1da177e4
LT		 777 rp->minor = minor;
778 list_add_tail(&rp->list, &raw3270_devices);
779 }
14cc3e2b 780 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 781 /* No free minor number? Then give up. */
782 if (rp->minor == -1)
783 return -EUSERS;
784 rp->cdev = cdev;
dff59b64 785 dev_set_drvdata(&cdev->dev, rp);
1da177e4
LT		 786 cdev->handler = raw3270_irq;
787 return 0;
788}
789
790#ifdef CONFIG_TN3270_CONSOLE
2253e8d7
SO		 791/* Tentative definition - see below for actual definition. */
792static struct ccw_driver raw3270_ccw_driver;
793
1da177e4
LT		 794/*
795 * Setup 3270 device configured as console.
796 */
2253e8d7 797struct raw3270 __init *raw3270_setup_console(void)
1da177e4 798{
2253e8d7 799 struct ccw_device *cdev;
4d334fd1 800 unsigned long flags;
1da177e4
LT		 801 struct raw3270 *rp;
802 char *ascebc;
803 int rc;
804
1e532096 805 cdev = ccw_device_create_console(&raw3270_ccw_driver);
2253e8d7
SO		 806 if (IS_ERR(cdev))
807 return ERR_CAST(cdev);
808
33403dcf
HC		 809 rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA);
810 ascebc = kzalloc(256, GFP_KERNEL);
1da177e4
LT		 811 rc = raw3270_setup_device(cdev, rp, ascebc);
812 if (rc)
813 return ERR_PTR(rc);
814 set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags);
1e532096
SO		 815
816 rc = ccw_device_enable_console(cdev);
817 if (rc) {
818 ccw_device_destroy_console(cdev);
819 return ERR_PTR(rc);
820 }
821
4d334fd1
MS		 822 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
823 do {
824 __raw3270_reset_device(rp);
825 while (!raw3270_state_final(rp)) {
188561a4 826 ccw_device_wait_idle(rp->cdev);
4d334fd1
MS		 827 barrier();
828 }
829 } while (rp->state != RAW3270_STATE_READY);
830 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1da177e4
LT		 831 return rp;
832}
833
834void
835raw3270_wait_cons_dev(struct raw3270 *rp)
836{
837 unsigned long flags;
838
839 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
188561a4 840 ccw_device_wait_idle(rp->cdev);
1da177e4
LT		 841 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
842}
843
844#endif
845
846/*
847 * Create a 3270 device structure.
848 */
849static struct raw3270 *
850raw3270_create_device(struct ccw_device *cdev)
851{
852 struct raw3270 *rp;
853 char *ascebc;
854 int rc;
855
bd1cb5de 856 rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA);
1da177e4
LT		 857 if (!rp)
858 return ERR_PTR(-ENOMEM);
859 ascebc = kmalloc(256, GFP_KERNEL);
860 if (!ascebc) {
861 kfree(rp);
862 return ERR_PTR(-ENOMEM);
863 }
864 rc = raw3270_setup_device(cdev, rp, ascebc);
865 if (rc) {
866 kfree(rp->ascebc);
867 kfree(rp);
868 rp = ERR_PTR(rc);
869 }
870 /* Get reference to ccw_device structure. */
871 get_device(&cdev->dev);
872 return rp;
873}
874
875/*
876 * Activate a view.
877 */
878int
879raw3270_activate_view(struct raw3270_view *view)
880{
881 struct raw3270 *rp;
882 struct raw3270_view *oldview, *nv;
883 unsigned long flags;
884 int rc;
885
886 rp = view->dev;
887 if (!rp)
888 return -ENODEV;
889 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
890 if (rp->view == view)
891 rc = 0;
4d334fd1
MS		 892 else if (!raw3270_state_ready(rp))
893 rc = -EBUSY;
4b214a0c
MS		 894 else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
895 rc = -EACCES;
1da177e4 896 else {
d2c993d8 897 oldview = NULL;
4d334fd1 898 if (rp->view && rp->view->fn->deactivate) {
1da177e4
LT		 899 oldview = rp->view;
900 oldview->fn->deactivate(oldview);
901 }
902 rp->view = view;
903 rc = view->fn->activate(view);
904 if (rc) {
905 /* Didn't work. Try to reactivate the old view. */
906 rp->view = oldview;
907 if (!oldview || oldview->fn->activate(oldview) != 0) {
908 /* Didn't work as well. Try any other view. */
909 list_for_each_entry(nv, &rp->view_list, list)
910 if (nv != view && nv != oldview) {
911 rp->view = nv;
912 if (nv->fn->activate(nv) == 0)
913 break;
d2c993d8 914 rp->view = NULL;
1da177e4
LT		 915 }
916 }
917 }
918 }
919 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
920 return rc;
921}
922
923/*
924 * Deactivate current view.
925 */
926void
927raw3270_deactivate_view(struct raw3270_view *view)
928{
929 unsigned long flags;
930 struct raw3270 *rp;
931
932 rp = view->dev;
933 if (!rp)
934 return;
935 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
936 if (rp->view == view) {
937 view->fn->deactivate(view);
d2c993d8 938 rp->view = NULL;
1da177e4
LT		 939 /* Move deactivated view to end of list. */
940 list_del_init(&view->list);
941 list_add_tail(&view->list, &rp->view_list);
942 /* Try to activate another view. */
4d334fd1 943 if (raw3270_state_ready(rp) &&
4b214a0c 944 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
ed3cb6f0
RH		 945 list_for_each_entry(view, &rp->view_list, list) {
946 rp->view = view;
947 if (view->fn->activate(view) == 0)
1da177e4 948 break;
d2c993d8 949 rp->view = NULL;
ed3cb6f0 950 }
1da177e4
LT		 951 }
952 }
953 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
954}
955
956/*
957 * Add view to device with minor "minor".
958 */
959int
960raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor)
961{
962 unsigned long flags;
963 struct raw3270 *rp;
964 int rc;
965
ed3cb6f0
RH		 966 if (minor <= 0)
967 return -ENODEV;
14cc3e2b 968 mutex_lock(&raw3270_mutex);
1da177e4
LT		 969 rc = -ENODEV;
970 list_for_each_entry(rp, &raw3270_devices, list) {
971 if (rp->minor != minor)
972 continue;
973 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
4d334fd1
MS		 974 atomic_set(&view->ref_count, 2);
975 view->dev = rp;
976 view->fn = fn;
977 view->model = rp->model;
978 view->rows = rp->rows;
979 view->cols = rp->cols;
980 view->ascebc = rp->ascebc;
981 spin_lock_init(&view->lock);
982 list_add(&view->list, &rp->view_list);
983 rc = 0;
1da177e4
LT		 984 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
985 break;
986 }
14cc3e2b 987 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 988 return rc;
989}
990
991/*
992 * Find specific view of device with minor "minor".
993 */
994struct raw3270_view *
995raw3270_find_view(struct raw3270_fn *fn, int minor)
996{
997 struct raw3270 *rp;
998 struct raw3270_view *view, *tmp;
999 unsigned long flags;
1000
14cc3e2b 1001 mutex_lock(&raw3270_mutex);
1da177e4
LT		 1002 view = ERR_PTR(-ENODEV);
1003 list_for_each_entry(rp, &raw3270_devices, list) {
1004 if (rp->minor != minor)
1005 continue;
1006 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
4d334fd1
MS		 1007 list_for_each_entry(tmp, &rp->view_list, list) {
1008 if (tmp->fn == fn) {
1009 raw3270_get_view(tmp);
1010 view = tmp;
1011 break;
1da177e4
LT		 1012 }
1013 }
1014 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1015 break;
1016 }
14cc3e2b 1017 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 1018 return view;
1019}
1020
1021/*
1022 * Remove view from device and free view structure via call to view->fn->free.
1023 */
1024void
1025raw3270_del_view(struct raw3270_view *view)
1026{
1027 unsigned long flags;
1028 struct raw3270 *rp;
1029 struct raw3270_view *nv;
1030
1031 rp = view->dev;
1032 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
1033 if (rp->view == view) {
1034 view->fn->deactivate(view);
d2c993d8 1035 rp->view = NULL;
1da177e4
LT		 1036 }
1037 list_del_init(&view->list);
4d334fd1 1038 if (!rp->view && raw3270_state_ready(rp) &&
4b214a0c 1039 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
1da177e4
LT		 1040 /* Try to activate another view. */
1041 list_for_each_entry(nv, &rp->view_list, list) {
ed3cb6f0 1042 if (nv->fn->activate(nv) == 0) {
1da177e4
LT		 1043 rp->view = nv;
1044 break;
1045 }
1046 }
1047 }
1048 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1049 /* Wait for reference counter to drop to zero. */
1050 atomic_dec(&view->ref_count);
1051 wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0);
1052 if (view->fn->free)
1053 view->fn->free(view);
1054}
1055
1056/*
1057 * Remove a 3270 device structure.
1058 */
1059static void
1060raw3270_delete_device(struct raw3270 *rp)
1061{
1062 struct ccw_device *cdev;
1063
1064 /* Remove from device chain. */
14cc3e2b 1065 mutex_lock(&raw3270_mutex);
1da177e4 1066 list_del_init(&rp->list);
14cc3e2b 1067 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 1068
1069 /* Disconnect from ccw_device. */
1070 cdev = rp->cdev;
d2c993d8 1071 rp->cdev = NULL;
dff59b64 1072 dev_set_drvdata(&cdev->dev, NULL);
d2c993d8 1073 cdev->handler = NULL;
1da177e4
LT		 1074
1075 /* Put ccw_device structure. */
1076 put_device(&cdev->dev);
1077
1078 /* Now free raw3270 structure. */
1079 kfree(rp->ascebc);
1080 kfree(rp);
1081}
1082
1083static int
1084raw3270_probe (struct ccw_device *cdev)
1085{
1086 return 0;
1087}
1088
1089/*
1090 * Additional attributes for a 3270 device
1091 */
1092static ssize_t
3fd3c0a5 1093raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 1094{
1095 return snprintf(buf, PAGE_SIZE, "%i\n",
dff59b64 1096 ((struct raw3270 *) dev_get_drvdata(dev))->model);
1da177e4 1097}
d2c993d8 1098static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL);
1da177e4
LT		 1099
1100static ssize_t
3fd3c0a5 1101raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 1102{
1103 return snprintf(buf, PAGE_SIZE, "%i\n",
dff59b64 1104 ((struct raw3270 *) dev_get_drvdata(dev))->rows);
1da177e4 1105}
d2c993d8 1106static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL);
1da177e4
LT		 1107
1108static ssize_t
3fd3c0a5 1109raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 1110{
1111 return snprintf(buf, PAGE_SIZE, "%i\n",
dff59b64 1112 ((struct raw3270 *) dev_get_drvdata(dev))->cols);
1da177e4 1113}
d2c993d8 1114static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL);
1da177e4
LT		 1115
1116static struct attribute * raw3270_attrs[] = {
1117 &dev_attr_model.attr,
1118 &dev_attr_rows.attr,
1119 &dev_attr_columns.attr,
1120 NULL,
1121};
1122
1123static struct attribute_group raw3270_attr_group = {
1124 .attrs = raw3270_attrs,
1125};
1126
d7cf0d57 1127static int raw3270_create_attributes(struct raw3270 *rp)
1da177e4 1128{
c95571e6 1129 return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group);
1da177e4
LT		 1130}
1131
1132/*
1133 * Notifier for device addition/removal
1134 */
c11ca97e 1135static LIST_HEAD(raw3270_notifier);
1da177e4 1136
c95571e6 1137int raw3270_register_notifier(struct raw3270_notifier *notifier)
1da177e4 1138{
1da177e4
LT		 1139 struct raw3270 *rp;
1140
14cc3e2b 1141 mutex_lock(&raw3270_mutex);
c95571e6
MS		 1142 list_add_tail(&notifier->list, &raw3270_notifier);
1143 list_for_each_entry(rp, &raw3270_devices, list)
1144 notifier->create(rp->minor);
14cc3e2b 1145 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 1146 return 0;
1147}
1148
c95571e6 1149void raw3270_unregister_notifier(struct raw3270_notifier *notifier)
1da177e4 1150{
c95571e6 1151 struct raw3270 *rp;
1da177e4 1152
14cc3e2b 1153 mutex_lock(&raw3270_mutex);
c95571e6
MS		 1154 list_for_each_entry(rp, &raw3270_devices, list)
1155 notifier->destroy(rp->minor);
1156 list_del(&notifier->list);
14cc3e2b 1157 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 1158}
1159
1160/*
1161 * Set 3270 device online.
1162 */
1163static int
1164raw3270_set_online (struct ccw_device *cdev)
1165{
1da177e4 1166 struct raw3270_notifier *np;
c95571e6 1167 struct raw3270 *rp;
1da177e4
LT		 1168 int rc;
1169
1170 rp = raw3270_create_device(cdev);
1171 if (IS_ERR(rp))
1172 return PTR_ERR(rp);
d7cf0d57
HC		 1173 rc = raw3270_create_attributes(rp);
1174 if (rc)
1175 goto failure;
4d334fd1 1176 raw3270_reset_device(rp);
14cc3e2b 1177 mutex_lock(&raw3270_mutex);
1da177e4 1178 list_for_each_entry(np, &raw3270_notifier, list)
c95571e6 1179 np->create(rp->minor);
14cc3e2b 1180 mutex_unlock(&raw3270_mutex);
1da177e4 1181 return 0;
ed3cb6f0
RH		 1182
1183failure:
1184 raw3270_delete_device(rp);
1185 return rc;
1da177e4
LT		 1186}
1187
1188/*
1189 * Remove 3270 device structure.
1190 */
1191static void
1192raw3270_remove (struct ccw_device *cdev)
1193{
1194 unsigned long flags;
1195 struct raw3270 *rp;
1196 struct raw3270_view *v;
1197 struct raw3270_notifier *np;
1198
dff59b64 1199 rp = dev_get_drvdata(&cdev->dev);
ed3cb6f0
RH		 1200 /*
1201 * _remove is the opposite of _probe; it's probe that
1202 * should set up rp. raw3270_remove gets entered for
1203 * devices even if they haven't been varied online.
1204 * Thus, rp may validly be NULL here.
1205 */
1206 if (rp == NULL)
1207 return;
1da177e4
LT		 1208
1209 sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group);
1210
1211 /* Deactivate current view and remove all views. */
1212 spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
1213 if (rp->view) {
4d334fd1
MS		 1214 if (rp->view->fn->deactivate)
1215 rp->view->fn->deactivate(rp->view);
d2c993d8 1216 rp->view = NULL;
1da177e4
LT		 1217 }
1218 while (!list_empty(&rp->view_list)) {
1219 v = list_entry(rp->view_list.next, struct raw3270_view, list);
1220 if (v->fn->release)
1221 v->fn->release(v);
1222 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
1223 raw3270_del_view(v);
1224 spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
1225 }
1226 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
1227
14cc3e2b 1228 mutex_lock(&raw3270_mutex);
1da177e4 1229 list_for_each_entry(np, &raw3270_notifier, list)
c95571e6 1230 np->destroy(rp->minor);
14cc3e2b 1231 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 1232
1233 /* Reset 3270 device. */
1234 raw3270_reset_device(rp);
1235 /* And finally remove it. */
1236 raw3270_delete_device(rp);
1237}
1238
1239/*
1240 * Set 3270 device offline.
1241 */
1242static int
1243raw3270_set_offline (struct ccw_device *cdev)
1244{
1245 struct raw3270 *rp;
1246
dff59b64 1247 rp = dev_get_drvdata(&cdev->dev);
1da177e4
LT		 1248 if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags))
1249 return -EBUSY;
1250 raw3270_remove(cdev);
1251 return 0;
1252}
1253
4b214a0c
MS		 1254static int raw3270_pm_stop(struct ccw_device *cdev)
1255{
1256 struct raw3270 *rp;
1257 struct raw3270_view *view;
1258 unsigned long flags;
1259
4f0076f7 1260 rp = dev_get_drvdata(&cdev->dev);
4b214a0c
MS		 1261 if (!rp)
1262 return 0;
1263 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
4d334fd1 1264 if (rp->view && rp->view->fn->deactivate)
4b214a0c
MS		 1265 rp->view->fn->deactivate(rp->view);
1266 if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) {
1267 /*
1268 * Release tty and fullscreen for all non-console
1269 * devices.
1270 */
1271 list_for_each_entry(view, &rp->view_list, list) {
1272 if (view->fn->release)
1273 view->fn->release(view);
1274 }
1275 }
1276 set_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
1277 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1278 return 0;
1279}
1280
1281static int raw3270_pm_start(struct ccw_device *cdev)
1282{
1283 struct raw3270 *rp;
1284 unsigned long flags;
1285
4f0076f7 1286 rp = dev_get_drvdata(&cdev->dev);
4b214a0c
MS		 1287 if (!rp)
1288 return 0;
1289 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
1290 clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
4d334fd1 1291 if (rp->view && rp->view->fn->activate)
4b214a0c
MS		 1292 rp->view->fn->activate(rp->view);
1293 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1294 return 0;
1295}
1296
1297void raw3270_pm_unfreeze(struct raw3270_view *view)
1298{
34483cac 1299#ifdef CONFIG_TN3270_CONSOLE
4b214a0c
MS		 1300 struct raw3270 *rp;
1301
1302 rp = view->dev;
1303 if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
f10ccca7 1304 ccw_device_force_console(rp->cdev);
34483cac 1305#endif
4b214a0c
MS		 1306}
1307
1da177e4
LT		 1308static struct ccw_device_id raw3270_id[] = {
1309 { CCW_DEVICE(0x3270, 0) },
1310 { CCW_DEVICE(0x3271, 0) },
1311 { CCW_DEVICE(0x3272, 0) },
1312 { CCW_DEVICE(0x3273, 0) },
1313 { CCW_DEVICE(0x3274, 0) },
1314 { CCW_DEVICE(0x3275, 0) },
1315 { CCW_DEVICE(0x3276, 0) },
1316 { CCW_DEVICE(0x3277, 0) },
1317 { CCW_DEVICE(0x3278, 0) },
1318 { CCW_DEVICE(0x3279, 0) },
1319 { CCW_DEVICE(0x3174, 0) },
1320 { /* end of list */ },
1321};
1322
1323static struct ccw_driver raw3270_ccw_driver = {
3bda058b
SO		 1324 .driver = {
1325 .name = "3270",
1326 .owner = THIS_MODULE,
1327 },
1da177e4
LT		 1328 .ids = raw3270_id,
1329 .probe = &raw3270_probe,
1330 .remove = &raw3270_remove,
1331 .set_online = &raw3270_set_online,
1332 .set_offline = &raw3270_set_offline,
4b214a0c
MS		 1333 .freeze = &raw3270_pm_stop,
1334 .thaw = &raw3270_pm_start,
1335 .restore = &raw3270_pm_start,
420f42ec 1336 .int_class = IRQIO_C70,
1da177e4
LT		 1337};
1338
1339static int
1340raw3270_init(void)
1341{
1342 struct raw3270 *rp;
1343 int rc;
1344
1345 if (raw3270_registered)
1346 return 0;
1347 raw3270_registered = 1;
1348 rc = ccw_driver_register(&raw3270_ccw_driver);
1349 if (rc == 0) {
1350 /* Create attributes for early (= console) device. */
14cc3e2b 1351 mutex_lock(&raw3270_mutex);
ed3cb6f0 1352 class3270 = class_create(THIS_MODULE, "3270");
1da177e4
LT		 1353 list_for_each_entry(rp, &raw3270_devices, list) {
1354 get_device(&rp->cdev->dev);
1355 raw3270_create_attributes(rp);
1356 }
14cc3e2b 1357 mutex_unlock(&raw3270_mutex);
1da177e4
LT		 1358 }
1359 return rc;
1360}
1361
1362static void
1363raw3270_exit(void)
1364{
1365 ccw_driver_unregister(&raw3270_ccw_driver);
ed3cb6f0 1366 class_destroy(class3270);
1da177e4
LT		 1367}
1368
1369MODULE_LICENSE("GPL");
1370
1371module_init(raw3270_init);
1372module_exit(raw3270_exit);
1373
c95571e6 1374EXPORT_SYMBOL(class3270);
1da177e4
LT		 1375EXPORT_SYMBOL(raw3270_request_alloc);
1376EXPORT_SYMBOL(raw3270_request_free);
1377EXPORT_SYMBOL(raw3270_request_reset);
1378EXPORT_SYMBOL(raw3270_request_set_cmd);
1379EXPORT_SYMBOL(raw3270_request_add_data);
1380EXPORT_SYMBOL(raw3270_request_set_data);
1381EXPORT_SYMBOL(raw3270_request_set_idal);
1382EXPORT_SYMBOL(raw3270_buffer_address);
1383EXPORT_SYMBOL(raw3270_add_view);
1384EXPORT_SYMBOL(raw3270_del_view);
1385EXPORT_SYMBOL(raw3270_find_view);
1386EXPORT_SYMBOL(raw3270_activate_view);
1387EXPORT_SYMBOL(raw3270_deactivate_view);
1388EXPORT_SYMBOL(raw3270_start);
ed3cb6f0 1389EXPORT_SYMBOL(raw3270_start_locked);
1da177e4 1390EXPORT_SYMBOL(raw3270_start_irq);
ed3cb6f0 1391EXPORT_SYMBOL(raw3270_reset);
1da177e4
LT		 1392EXPORT_SYMBOL(raw3270_register_notifier);
1393EXPORT_SYMBOL(raw3270_unregister_notifier);
1394EXPORT_SYMBOL(raw3270_wait_queue);
Linux 6.x block layer and io_uring tree(s)