Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4b214a0c | 2 | * IBM/3270 Driver - core functions. |
1da177e4 | 3 | * |
4b214a0c MS |
4 | * Author(s): |
5 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
6 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
7 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
8 | */ |
9 | ||
3fe22f6b | 10 | #include <linux/kernel_stat.h> |
1da177e4 LT |
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 | ||
1da177e4 LT |
146 | /* |
147 | * Free 3270 ccw request | |
148 | */ | |
149 | void | |
150 | raw3270_request_free (struct raw3270_request *rq) | |
151 | { | |
17fd682e | 152 | kfree(rq->buffer); |
1da177e4 LT |
153 | kfree(rq); |
154 | } | |
155 | ||
156 | /* | |
157 | * Reset request to initial state. | |
158 | */ | |
159 | void | |
160 | raw3270_request_reset(struct raw3270_request *rq) | |
161 | { | |
162 | BUG_ON(!list_empty(&rq->list)); | |
163 | rq->ccw.cmd_code = 0; | |
164 | rq->ccw.count = 0; | |
165 | rq->ccw.cda = __pa(rq->buffer); | |
166 | rq->ccw.flags = CCW_FLAG_SLI; | |
167 | rq->rescnt = 0; | |
168 | rq->rc = 0; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Set command code to ccw of a request. | |
173 | */ | |
174 | void | |
175 | raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) | |
176 | { | |
177 | rq->ccw.cmd_code = cmd; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Add data fragment to output buffer. | |
182 | */ | |
183 | int | |
184 | raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) | |
185 | { | |
186 | if (size + rq->ccw.count > rq->size) | |
187 | return -E2BIG; | |
188 | memcpy(rq->buffer + rq->ccw.count, data, size); | |
189 | rq->ccw.count += size; | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Set address/length pair to ccw of a request. | |
195 | */ | |
196 | void | |
197 | raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) | |
198 | { | |
199 | rq->ccw.cda = __pa(data); | |
200 | rq->ccw.count = size; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Set idal buffer to ccw of a request. | |
205 | */ | |
206 | void | |
207 | raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) | |
208 | { | |
209 | rq->ccw.cda = __pa(ib->data); | |
210 | rq->ccw.count = ib->size; | |
211 | rq->ccw.flags |= CCW_FLAG_IDA; | |
212 | } | |
213 | ||
214 | /* | |
215 | * Stop running ccw. | |
216 | */ | |
217 | static int | |
218 | raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) | |
219 | { | |
220 | int retries; | |
221 | int rc; | |
222 | ||
223 | if (raw3270_request_final(rq)) | |
224 | return 0; | |
225 | /* Check if interrupt has already been processed */ | |
226 | for (retries = 0; retries < 5; retries++) { | |
227 | if (retries < 2) | |
228 | rc = ccw_device_halt(rp->cdev, (long) rq); | |
229 | else | |
230 | rc = ccw_device_clear(rp->cdev, (long) rq); | |
231 | if (rc == 0) | |
232 | break; /* termination successful */ | |
233 | } | |
234 | return rc; | |
235 | } | |
236 | ||
237 | static int | |
238 | raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) | |
239 | { | |
240 | unsigned long flags; | |
241 | int rc; | |
242 | ||
243 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
244 | rc = raw3270_halt_io_nolock(rp, rq); | |
245 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
246 | return rc; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Add the request to the request queue, try to start it if the | |
251 | * 3270 device is idle. Return without waiting for end of i/o. | |
252 | */ | |
253 | static int | |
254 | __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, | |
255 | struct raw3270_request *rq) | |
256 | { | |
257 | rq->view = view; | |
258 | raw3270_get_view(view); | |
259 | if (list_empty(&rp->req_queue) && | |
260 | !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
261 | /* No other requests are on the queue. Start this one. */ | |
262 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
263 | (unsigned long) rq, 0, 0); | |
264 | if (rq->rc) { | |
265 | raw3270_put_view(view); | |
266 | return rq->rc; | |
267 | } | |
268 | } | |
269 | list_add_tail(&rq->list, &rp->req_queue); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | int | |
274 | raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) | |
275 | { | |
276 | unsigned long flags; | |
277 | struct raw3270 *rp; | |
278 | int rc; | |
279 | ||
280 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
281 | rp = view->dev; | |
4b214a0c MS |
282 | if (!rp || rp->view != view || |
283 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1da177e4 LT |
284 | rc = -EACCES; |
285 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
286 | rc = -ENODEV; | |
287 | else | |
288 | rc = __raw3270_start(rp, view, rq); | |
289 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
290 | return rc; | |
291 | } | |
292 | ||
ed3cb6f0 RH |
293 | int |
294 | raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) | |
295 | { | |
296 | struct raw3270 *rp; | |
297 | int rc; | |
298 | ||
299 | rp = view->dev; | |
4b214a0c MS |
300 | if (!rp || rp->view != view || |
301 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 RH |
302 | rc = -EACCES; |
303 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
304 | rc = -ENODEV; | |
305 | else | |
306 | rc = __raw3270_start(rp, view, rq); | |
307 | return rc; | |
308 | } | |
309 | ||
1da177e4 LT |
310 | int |
311 | raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) | |
312 | { | |
313 | struct raw3270 *rp; | |
314 | ||
315 | rp = view->dev; | |
316 | rq->view = view; | |
317 | raw3270_get_view(view); | |
318 | list_add_tail(&rq->list, &rp->req_queue); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | /* | |
323 | * 3270 interrupt routine, called from the ccw_device layer | |
324 | */ | |
325 | static void | |
326 | raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
327 | { | |
328 | struct raw3270 *rp; | |
329 | struct raw3270_view *view; | |
330 | struct raw3270_request *rq; | |
331 | int rc; | |
332 | ||
3fe22f6b | 333 | kstat_cpu(smp_processor_id()).irqs[IOINT_C70]++; |
dff59b64 | 334 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
335 | if (!rp) |
336 | return; | |
337 | rq = (struct raw3270_request *) intparm; | |
338 | view = rq ? rq->view : rp->view; | |
339 | ||
340 | if (IS_ERR(irb)) | |
341 | rc = RAW3270_IO_RETRY; | |
23d805b6 | 342 | else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1da177e4 LT |
343 | rq->rc = -EIO; |
344 | rc = RAW3270_IO_DONE; | |
23d805b6 PO |
345 | } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | |
346 | DEV_STAT_UNIT_EXCEP)) { | |
1da177e4 LT |
347 | /* Handle CE-DE-UE and subsequent UDE */ |
348 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); | |
349 | rc = RAW3270_IO_BUSY; | |
350 | } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
351 | /* Wait for UDE if busy flag is set. */ | |
23d805b6 | 352 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
1da177e4 LT |
353 | clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
354 | /* Got it, now retry. */ | |
355 | rc = RAW3270_IO_RETRY; | |
356 | } else | |
357 | rc = RAW3270_IO_BUSY; | |
358 | } else if (view) | |
359 | rc = view->fn->intv(view, rq, irb); | |
360 | else | |
361 | rc = RAW3270_IO_DONE; | |
362 | ||
363 | switch (rc) { | |
364 | case RAW3270_IO_DONE: | |
365 | break; | |
366 | case RAW3270_IO_BUSY: | |
367 | /* | |
368 | * Intervention required by the operator. We have to wait | |
369 | * for unsolicited device end. | |
370 | */ | |
371 | return; | |
372 | case RAW3270_IO_RETRY: | |
373 | if (!rq) | |
374 | break; | |
375 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
376 | (unsigned long) rq, 0, 0); | |
377 | if (rq->rc == 0) | |
3ad2f3fb | 378 | return; /* Successfully restarted. */ |
1da177e4 LT |
379 | break; |
380 | case RAW3270_IO_STOP: | |
381 | if (!rq) | |
382 | break; | |
383 | raw3270_halt_io_nolock(rp, rq); | |
384 | rq->rc = -EIO; | |
385 | break; | |
386 | default: | |
387 | BUG(); | |
388 | } | |
389 | if (rq) { | |
390 | BUG_ON(list_empty(&rq->list)); | |
391 | /* The request completed, remove from queue and do callback. */ | |
392 | list_del_init(&rq->list); | |
393 | if (rq->callback) | |
394 | rq->callback(rq, rq->callback_data); | |
395 | /* Do put_device for get_device in raw3270_start. */ | |
396 | raw3270_put_view(view); | |
397 | } | |
398 | /* | |
399 | * Try to start each request on request queue until one is | |
400 | * started successful. | |
401 | */ | |
402 | while (!list_empty(&rp->req_queue)) { | |
403 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
404 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
405 | (unsigned long) rq, 0, 0); | |
406 | if (rq->rc == 0) | |
407 | break; | |
408 | /* Start failed. Remove request and do callback. */ | |
409 | list_del_init(&rq->list); | |
410 | if (rq->callback) | |
411 | rq->callback(rq, rq->callback_data); | |
412 | /* Do put_device for get_device in raw3270_start. */ | |
413 | raw3270_put_view(view); | |
414 | } | |
415 | } | |
416 | ||
417 | /* | |
418 | * Size sensing. | |
419 | */ | |
420 | ||
421 | struct raw3270_ua { /* Query Reply structure for Usable Area */ | |
422 | struct { /* Usable Area Query Reply Base */ | |
423 | short l; /* Length of this structured field */ | |
424 | char sfid; /* 0x81 if Query Reply */ | |
425 | char qcode; /* 0x81 if Usable Area */ | |
426 | char flags0; | |
427 | char flags1; | |
428 | short w; /* Width of usable area */ | |
429 | short h; /* Heigth of usavle area */ | |
430 | char units; /* 0x00:in; 0x01:mm */ | |
431 | int xr; | |
432 | int yr; | |
433 | char aw; | |
434 | char ah; | |
435 | short buffsz; /* Character buffer size, bytes */ | |
436 | char xmin; | |
437 | char ymin; | |
438 | char xmax; | |
439 | char ymax; | |
440 | } __attribute__ ((packed)) uab; | |
441 | struct { /* Alternate Usable Area Self-Defining Parameter */ | |
442 | char l; /* Length of this Self-Defining Parm */ | |
443 | char sdpid; /* 0x02 if Alternate Usable Area */ | |
444 | char res; | |
445 | char auaid; /* 0x01 is Id for the A U A */ | |
446 | short wauai; /* Width of AUAi */ | |
447 | short hauai; /* Height of AUAi */ | |
448 | char auaunits; /* 0x00:in, 0x01:mm */ | |
449 | int auaxr; | |
450 | int auayr; | |
451 | char awauai; | |
452 | char ahauai; | |
453 | } __attribute__ ((packed)) aua; | |
454 | } __attribute__ ((packed)); | |
455 | ||
1da177e4 | 456 | static struct diag210 raw3270_init_diag210; |
d330f935 | 457 | static DEFINE_MUTEX(raw3270_init_mutex); |
1da177e4 LT |
458 | |
459 | static int | |
460 | raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, | |
461 | struct irb *irb) | |
462 | { | |
463 | /* | |
464 | * Unit-Check Processing: | |
465 | * Expect Command Reject or Intervention Required. | |
466 | */ | |
23d805b6 | 467 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 LT |
468 | /* Request finished abnormally. */ |
469 | if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { | |
470 | set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); | |
471 | return RAW3270_IO_BUSY; | |
472 | } | |
473 | } | |
474 | if (rq) { | |
23d805b6 | 475 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 LT |
476 | if (irb->ecw[0] & SNS0_CMD_REJECT) |
477 | rq->rc = -EOPNOTSUPP; | |
478 | else | |
479 | rq->rc = -EIO; | |
480 | } else | |
481 | /* Request finished normally. Copy residual count. */ | |
23d805b6 | 482 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 | 483 | } |
23d805b6 | 484 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
485 | set_bit(RAW3270_FLAGS_ATTN, &view->dev->flags); |
486 | wake_up(&raw3270_wait_queue); | |
487 | } | |
488 | return RAW3270_IO_DONE; | |
489 | } | |
490 | ||
491 | static struct raw3270_fn raw3270_init_fn = { | |
492 | .intv = raw3270_init_irq | |
493 | }; | |
494 | ||
495 | static struct raw3270_view raw3270_init_view = { | |
496 | .fn = &raw3270_init_fn | |
497 | }; | |
498 | ||
499 | /* | |
500 | * raw3270_wait/raw3270_wait_interruptible/__raw3270_wakeup | |
501 | * Wait for end of request. The request must have been started | |
502 | * with raw3270_start, rc = 0. The device lock may NOT have been | |
503 | * released between calling raw3270_start and raw3270_wait. | |
504 | */ | |
505 | static void | |
506 | raw3270_wake_init(struct raw3270_request *rq, void *data) | |
507 | { | |
508 | wake_up((wait_queue_head_t *) data); | |
509 | } | |
510 | ||
511 | /* | |
512 | * Special wait function that can cope with console initialization. | |
513 | */ | |
514 | static int | |
515 | raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, | |
516 | struct raw3270_request *rq) | |
517 | { | |
518 | unsigned long flags; | |
1da177e4 LT |
519 | int rc; |
520 | ||
521 | #ifdef CONFIG_TN3270_CONSOLE | |
522 | if (raw3270_registered == 0) { | |
523 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
d2c993d8 | 524 | rq->callback = NULL; |
1da177e4 LT |
525 | rc = __raw3270_start(rp, view, rq); |
526 | if (rc == 0) | |
527 | while (!raw3270_request_final(rq)) { | |
528 | wait_cons_dev(); | |
529 | barrier(); | |
530 | } | |
531 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
532 | return rq->rc; | |
533 | } | |
534 | #endif | |
1da177e4 | 535 | rq->callback = raw3270_wake_init; |
54ad6412 | 536 | rq->callback_data = &raw3270_wait_queue; |
1da177e4 LT |
537 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); |
538 | rc = __raw3270_start(rp, view, rq); | |
539 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
540 | if (rc) | |
541 | return rc; | |
542 | /* Now wait for the completion. */ | |
54ad6412 MS |
543 | rc = wait_event_interruptible(raw3270_wait_queue, |
544 | raw3270_request_final(rq)); | |
1da177e4 LT |
545 | if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ |
546 | raw3270_halt_io(view->dev, rq); | |
547 | /* No wait for the halt to complete. */ | |
54ad6412 | 548 | wait_event(raw3270_wait_queue, raw3270_request_final(rq)); |
1da177e4 LT |
549 | return -ERESTARTSYS; |
550 | } | |
551 | return rq->rc; | |
552 | } | |
553 | ||
554 | static int | |
555 | __raw3270_size_device_vm(struct raw3270 *rp) | |
556 | { | |
557 | int rc, model; | |
9a92fe48 | 558 | struct ccw_dev_id dev_id; |
1da177e4 | 559 | |
9a92fe48 CH |
560 | ccw_device_get_id(rp->cdev, &dev_id); |
561 | raw3270_init_diag210.vrdcdvno = dev_id.devno; | |
1da177e4 LT |
562 | raw3270_init_diag210.vrdclen = sizeof(struct diag210); |
563 | rc = diag210(&raw3270_init_diag210); | |
564 | if (rc) | |
565 | return rc; | |
566 | model = raw3270_init_diag210.vrdccrmd; | |
567 | switch (model) { | |
568 | case 2: | |
569 | rp->model = model; | |
570 | rp->rows = 24; | |
571 | rp->cols = 80; | |
572 | break; | |
573 | case 3: | |
574 | rp->model = model; | |
575 | rp->rows = 32; | |
576 | rp->cols = 80; | |
577 | break; | |
578 | case 4: | |
579 | rp->model = model; | |
580 | rp->rows = 43; | |
581 | rp->cols = 80; | |
582 | break; | |
583 | case 5: | |
584 | rp->model = model; | |
585 | rp->rows = 27; | |
586 | rp->cols = 132; | |
587 | break; | |
588 | default: | |
1da177e4 LT |
589 | rc = -EOPNOTSUPP; |
590 | break; | |
591 | } | |
592 | return rc; | |
593 | } | |
594 | ||
595 | static int | |
596 | __raw3270_size_device(struct raw3270 *rp) | |
597 | { | |
598 | static const unsigned char wbuf[] = | |
599 | { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; | |
600 | struct raw3270_ua *uap; | |
601 | unsigned short count; | |
602 | int rc; | |
603 | ||
604 | /* | |
605 | * To determine the size of the 3270 device we need to do: | |
606 | * 1) send a 'read partition' data stream to the device | |
25985edc | 607 | * 2) wait for the attn interrupt that precedes the query reply |
1da177e4 LT |
608 | * 3) do a read modified to get the query reply |
609 | * To make things worse we have to cope with intervention | |
610 | * required (3270 device switched to 'stand-by') and command | |
611 | * rejects (old devices that can't do 'read partition'). | |
612 | */ | |
132fab13 MS |
613 | memset(&rp->init_request, 0, sizeof(rp->init_request)); |
614 | memset(&rp->init_data, 0, 256); | |
615 | /* Store 'read partition' data stream to init_data */ | |
616 | memcpy(&rp->init_data, wbuf, sizeof(wbuf)); | |
617 | INIT_LIST_HEAD(&rp->init_request.list); | |
618 | rp->init_request.ccw.cmd_code = TC_WRITESF; | |
619 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
620 | rp->init_request.ccw.count = sizeof(wbuf); | |
621 | rp->init_request.ccw.cda = (__u32) __pa(&rp->init_data); | |
622 | ||
623 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); | |
3863e724 | 624 | if (rc) |
1da177e4 | 625 | /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ |
1da177e4 | 626 | return rc; |
1da177e4 LT |
627 | |
628 | /* Wait for attention interrupt. */ | |
629 | #ifdef CONFIG_TN3270_CONSOLE | |
630 | if (raw3270_registered == 0) { | |
631 | unsigned long flags; | |
632 | ||
633 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
634 | while (!test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)) | |
635 | wait_cons_dev(); | |
636 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
637 | } else | |
638 | #endif | |
639 | rc = wait_event_interruptible(raw3270_wait_queue, | |
640 | test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)); | |
641 | if (rc) | |
642 | return rc; | |
643 | ||
644 | /* | |
645 | * The device accepted the 'read partition' command. Now | |
646 | * set up a read ccw and issue it. | |
647 | */ | |
132fab13 MS |
648 | rp->init_request.ccw.cmd_code = TC_READMOD; |
649 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
650 | rp->init_request.ccw.count = sizeof(rp->init_data); | |
651 | rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); | |
652 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); | |
1da177e4 LT |
653 | if (rc) |
654 | return rc; | |
655 | /* Got a Query Reply */ | |
132fab13 MS |
656 | count = sizeof(rp->init_data) - rp->init_request.rescnt; |
657 | uap = (struct raw3270_ua *) (rp->init_data + 1); | |
1da177e4 | 658 | /* Paranoia check. */ |
132fab13 | 659 | if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) |
1da177e4 LT |
660 | return -EOPNOTSUPP; |
661 | /* Copy rows/columns of default Usable Area */ | |
662 | rp->rows = uap->uab.h; | |
663 | rp->cols = uap->uab.w; | |
664 | /* Check for 14 bit addressing */ | |
665 | if ((uap->uab.flags0 & 0x0d) == 0x01) | |
666 | set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); | |
667 | /* Check for Alternate Usable Area */ | |
668 | if (uap->uab.l == sizeof(struct raw3270_ua) && | |
669 | uap->aua.sdpid == 0x02) { | |
670 | rp->rows = uap->aua.hauai; | |
671 | rp->cols = uap->aua.wauai; | |
672 | } | |
673 | return 0; | |
674 | } | |
675 | ||
676 | static int | |
677 | raw3270_size_device(struct raw3270 *rp) | |
678 | { | |
679 | int rc; | |
680 | ||
d330f935 | 681 | mutex_lock(&raw3270_init_mutex); |
1da177e4 LT |
682 | rp->view = &raw3270_init_view; |
683 | raw3270_init_view.dev = rp; | |
3863e724 MS |
684 | if (MACHINE_IS_VM) |
685 | rc = __raw3270_size_device_vm(rp); | |
686 | else | |
687 | rc = __raw3270_size_device(rp); | |
d2c993d8 HC |
688 | raw3270_init_view.dev = NULL; |
689 | rp->view = NULL; | |
d330f935 | 690 | mutex_unlock(&raw3270_init_mutex); |
1da177e4 LT |
691 | if (rc == 0) { /* Found something. */ |
692 | /* Try to find a model. */ | |
693 | rp->model = 0; | |
694 | if (rp->rows == 24 && rp->cols == 80) | |
695 | rp->model = 2; | |
696 | if (rp->rows == 32 && rp->cols == 80) | |
697 | rp->model = 3; | |
698 | if (rp->rows == 43 && rp->cols == 80) | |
699 | rp->model = 4; | |
700 | if (rp->rows == 27 && rp->cols == 132) | |
701 | rp->model = 5; | |
3863e724 MS |
702 | } else { |
703 | /* Couldn't detect size. Use default model 2. */ | |
704 | rp->model = 2; | |
705 | rp->rows = 24; | |
706 | rp->cols = 80; | |
707 | return 0; | |
1da177e4 LT |
708 | } |
709 | return rc; | |
710 | } | |
711 | ||
712 | static int | |
713 | raw3270_reset_device(struct raw3270 *rp) | |
714 | { | |
715 | int rc; | |
716 | ||
d330f935 | 717 | mutex_lock(&raw3270_init_mutex); |
132fab13 MS |
718 | memset(&rp->init_request, 0, sizeof(rp->init_request)); |
719 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
720 | /* Store reset data stream to init_data/init_request */ | |
721 | rp->init_data[0] = TW_KR; | |
722 | INIT_LIST_HEAD(&rp->init_request.list); | |
723 | rp->init_request.ccw.cmd_code = TC_EWRITEA; | |
724 | rp->init_request.ccw.flags = CCW_FLAG_SLI; | |
725 | rp->init_request.ccw.count = 1; | |
726 | rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); | |
1da177e4 LT |
727 | rp->view = &raw3270_init_view; |
728 | raw3270_init_view.dev = rp; | |
132fab13 | 729 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); |
d2c993d8 HC |
730 | raw3270_init_view.dev = NULL; |
731 | rp->view = NULL; | |
d330f935 | 732 | mutex_unlock(&raw3270_init_mutex); |
1da177e4 LT |
733 | return rc; |
734 | } | |
735 | ||
ed3cb6f0 RH |
736 | int |
737 | raw3270_reset(struct raw3270_view *view) | |
738 | { | |
739 | struct raw3270 *rp; | |
740 | int rc; | |
741 | ||
742 | rp = view->dev; | |
4b214a0c MS |
743 | if (!rp || rp->view != view || |
744 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 RH |
745 | rc = -EACCES; |
746 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
747 | rc = -ENODEV; | |
748 | else | |
749 | rc = raw3270_reset_device(view->dev); | |
750 | return rc; | |
751 | } | |
752 | ||
1da177e4 LT |
753 | /* |
754 | * Setup new 3270 device. | |
755 | */ | |
756 | static int | |
757 | raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) | |
758 | { | |
759 | struct list_head *l; | |
760 | struct raw3270 *tmp; | |
761 | int minor; | |
762 | ||
763 | memset(rp, 0, sizeof(struct raw3270)); | |
764 | /* Copy ebcdic -> ascii translation table. */ | |
765 | memcpy(ascebc, _ascebc, 256); | |
766 | if (tubxcorrect) { | |
767 | /* correct brackets and circumflex */ | |
768 | ascebc['['] = 0xad; | |
769 | ascebc[']'] = 0xbd; | |
770 | ascebc['^'] = 0xb0; | |
771 | } | |
772 | rp->ascebc = ascebc; | |
773 | ||
774 | /* Set defaults. */ | |
775 | rp->rows = 24; | |
776 | rp->cols = 80; | |
777 | ||
778 | INIT_LIST_HEAD(&rp->req_queue); | |
779 | INIT_LIST_HEAD(&rp->view_list); | |
780 | ||
781 | /* | |
782 | * Add device to list and find the smallest unused minor | |
ed3cb6f0 RH |
783 | * number for it. Note: there is no device with minor 0, |
784 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 785 | */ |
14cc3e2b | 786 | mutex_lock(&raw3270_mutex); |
1da177e4 | 787 | /* Keep the list sorted. */ |
ed3cb6f0 | 788 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
789 | rp->minor = -1; |
790 | list_for_each(l, &raw3270_devices) { | |
791 | tmp = list_entry(l, struct raw3270, list); | |
792 | if (tmp->minor > minor) { | |
793 | rp->minor = minor; | |
794 | __list_add(&rp->list, l->prev, l); | |
795 | break; | |
796 | } | |
797 | minor++; | |
798 | } | |
ed3cb6f0 | 799 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
800 | rp->minor = minor; |
801 | list_add_tail(&rp->list, &raw3270_devices); | |
802 | } | |
14cc3e2b | 803 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
804 | /* No free minor number? Then give up. */ |
805 | if (rp->minor == -1) | |
806 | return -EUSERS; | |
807 | rp->cdev = cdev; | |
dff59b64 | 808 | dev_set_drvdata(&cdev->dev, rp); |
1da177e4 LT |
809 | cdev->handler = raw3270_irq; |
810 | return 0; | |
811 | } | |
812 | ||
813 | #ifdef CONFIG_TN3270_CONSOLE | |
814 | /* | |
815 | * Setup 3270 device configured as console. | |
816 | */ | |
e62133b4 | 817 | struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) |
1da177e4 LT |
818 | { |
819 | struct raw3270 *rp; | |
820 | char *ascebc; | |
821 | int rc; | |
822 | ||
33403dcf HC |
823 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
824 | ascebc = kzalloc(256, GFP_KERNEL); | |
1da177e4 LT |
825 | rc = raw3270_setup_device(cdev, rp, ascebc); |
826 | if (rc) | |
827 | return ERR_PTR(rc); | |
828 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
829 | rc = raw3270_reset_device(rp); | |
830 | if (rc) | |
831 | return ERR_PTR(rc); | |
832 | rc = raw3270_size_device(rp); | |
833 | if (rc) | |
834 | return ERR_PTR(rc); | |
835 | rc = raw3270_reset_device(rp); | |
836 | if (rc) | |
837 | return ERR_PTR(rc); | |
838 | set_bit(RAW3270_FLAGS_READY, &rp->flags); | |
839 | return rp; | |
840 | } | |
841 | ||
842 | void | |
843 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
844 | { | |
845 | unsigned long flags; | |
846 | ||
847 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
848 | wait_cons_dev(); | |
849 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
850 | } | |
851 | ||
852 | #endif | |
853 | ||
854 | /* | |
855 | * Create a 3270 device structure. | |
856 | */ | |
857 | static struct raw3270 * | |
858 | raw3270_create_device(struct ccw_device *cdev) | |
859 | { | |
860 | struct raw3270 *rp; | |
861 | char *ascebc; | |
862 | int rc; | |
863 | ||
132fab13 | 864 | rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
865 | if (!rp) |
866 | return ERR_PTR(-ENOMEM); | |
867 | ascebc = kmalloc(256, GFP_KERNEL); | |
868 | if (!ascebc) { | |
869 | kfree(rp); | |
870 | return ERR_PTR(-ENOMEM); | |
871 | } | |
872 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
873 | if (rc) { | |
874 | kfree(rp->ascebc); | |
875 | kfree(rp); | |
876 | rp = ERR_PTR(rc); | |
877 | } | |
878 | /* Get reference to ccw_device structure. */ | |
879 | get_device(&cdev->dev); | |
880 | return rp; | |
881 | } | |
882 | ||
883 | /* | |
884 | * Activate a view. | |
885 | */ | |
886 | int | |
887 | raw3270_activate_view(struct raw3270_view *view) | |
888 | { | |
889 | struct raw3270 *rp; | |
890 | struct raw3270_view *oldview, *nv; | |
891 | unsigned long flags; | |
892 | int rc; | |
893 | ||
894 | rp = view->dev; | |
895 | if (!rp) | |
896 | return -ENODEV; | |
897 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
898 | if (rp->view == view) | |
899 | rc = 0; | |
900 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
901 | rc = -ENODEV; | |
4b214a0c MS |
902 | else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
903 | rc = -EACCES; | |
1da177e4 | 904 | else { |
d2c993d8 | 905 | oldview = NULL; |
1da177e4 LT |
906 | if (rp->view) { |
907 | oldview = rp->view; | |
908 | oldview->fn->deactivate(oldview); | |
909 | } | |
910 | rp->view = view; | |
911 | rc = view->fn->activate(view); | |
912 | if (rc) { | |
913 | /* Didn't work. Try to reactivate the old view. */ | |
914 | rp->view = oldview; | |
915 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
916 | /* Didn't work as well. Try any other view. */ | |
917 | list_for_each_entry(nv, &rp->view_list, list) | |
918 | if (nv != view && nv != oldview) { | |
919 | rp->view = nv; | |
920 | if (nv->fn->activate(nv) == 0) | |
921 | break; | |
d2c993d8 | 922 | rp->view = NULL; |
1da177e4 LT |
923 | } |
924 | } | |
925 | } | |
926 | } | |
927 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
928 | return rc; | |
929 | } | |
930 | ||
931 | /* | |
932 | * Deactivate current view. | |
933 | */ | |
934 | void | |
935 | raw3270_deactivate_view(struct raw3270_view *view) | |
936 | { | |
937 | unsigned long flags; | |
938 | struct raw3270 *rp; | |
939 | ||
940 | rp = view->dev; | |
941 | if (!rp) | |
942 | return; | |
943 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
944 | if (rp->view == view) { | |
945 | view->fn->deactivate(view); | |
d2c993d8 | 946 | rp->view = NULL; |
1da177e4 LT |
947 | /* Move deactivated view to end of list. */ |
948 | list_del_init(&view->list); | |
949 | list_add_tail(&view->list, &rp->view_list); | |
950 | /* Try to activate another view. */ | |
4b214a0c MS |
951 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags) && |
952 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { | |
ed3cb6f0 RH |
953 | list_for_each_entry(view, &rp->view_list, list) { |
954 | rp->view = view; | |
955 | if (view->fn->activate(view) == 0) | |
1da177e4 | 956 | break; |
d2c993d8 | 957 | rp->view = NULL; |
ed3cb6f0 | 958 | } |
1da177e4 LT |
959 | } |
960 | } | |
961 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
962 | } | |
963 | ||
964 | /* | |
965 | * Add view to device with minor "minor". | |
966 | */ | |
967 | int | |
968 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) | |
969 | { | |
970 | unsigned long flags; | |
971 | struct raw3270 *rp; | |
972 | int rc; | |
973 | ||
ed3cb6f0 RH |
974 | if (minor <= 0) |
975 | return -ENODEV; | |
14cc3e2b | 976 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
977 | rc = -ENODEV; |
978 | list_for_each_entry(rp, &raw3270_devices, list) { | |
979 | if (rp->minor != minor) | |
980 | continue; | |
981 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
982 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
983 | atomic_set(&view->ref_count, 2); | |
984 | view->dev = rp; | |
985 | view->fn = fn; | |
986 | view->model = rp->model; | |
987 | view->rows = rp->rows; | |
988 | view->cols = rp->cols; | |
989 | view->ascebc = rp->ascebc; | |
990 | spin_lock_init(&view->lock); | |
ed3cb6f0 | 991 | list_add(&view->list, &rp->view_list); |
1da177e4 LT |
992 | rc = 0; |
993 | } | |
994 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
995 | break; | |
996 | } | |
14cc3e2b | 997 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
998 | return rc; |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * Find specific view of device with minor "minor". | |
1003 | */ | |
1004 | struct raw3270_view * | |
1005 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
1006 | { | |
1007 | struct raw3270 *rp; | |
1008 | struct raw3270_view *view, *tmp; | |
1009 | unsigned long flags; | |
1010 | ||
14cc3e2b | 1011 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1012 | view = ERR_PTR(-ENODEV); |
1013 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1014 | if (rp->minor != minor) | |
1015 | continue; | |
1016 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1017 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1018 | view = ERR_PTR(-ENOENT); | |
1019 | list_for_each_entry(tmp, &rp->view_list, list) { | |
1020 | if (tmp->fn == fn) { | |
1021 | raw3270_get_view(tmp); | |
1022 | view = tmp; | |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | } | |
1027 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1028 | break; | |
1029 | } | |
14cc3e2b | 1030 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1031 | return view; |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Remove view from device and free view structure via call to view->fn->free. | |
1036 | */ | |
1037 | void | |
1038 | raw3270_del_view(struct raw3270_view *view) | |
1039 | { | |
1040 | unsigned long flags; | |
1041 | struct raw3270 *rp; | |
1042 | struct raw3270_view *nv; | |
1043 | ||
1044 | rp = view->dev; | |
1045 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1046 | if (rp->view == view) { | |
1047 | view->fn->deactivate(view); | |
d2c993d8 | 1048 | rp->view = NULL; |
1da177e4 LT |
1049 | } |
1050 | list_del_init(&view->list); | |
4b214a0c MS |
1051 | if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags) && |
1052 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { | |
1da177e4 LT |
1053 | /* Try to activate another view. */ |
1054 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 1055 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
1056 | rp->view = nv; |
1057 | break; | |
1058 | } | |
1059 | } | |
1060 | } | |
1061 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1062 | /* Wait for reference counter to drop to zero. */ | |
1063 | atomic_dec(&view->ref_count); | |
1064 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1065 | if (view->fn->free) | |
1066 | view->fn->free(view); | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * Remove a 3270 device structure. | |
1071 | */ | |
1072 | static void | |
1073 | raw3270_delete_device(struct raw3270 *rp) | |
1074 | { | |
1075 | struct ccw_device *cdev; | |
1076 | ||
1077 | /* Remove from device chain. */ | |
14cc3e2b | 1078 | mutex_lock(&raw3270_mutex); |
d7cf0d57 | 1079 | if (rp->clttydev && !IS_ERR(rp->clttydev)) |
7f021ce1 | 1080 | device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); |
d7cf0d57 | 1081 | if (rp->cltubdev && !IS_ERR(rp->cltubdev)) |
7f021ce1 | 1082 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, rp->minor)); |
1da177e4 | 1083 | list_del_init(&rp->list); |
14cc3e2b | 1084 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1085 | |
1086 | /* Disconnect from ccw_device. */ | |
1087 | cdev = rp->cdev; | |
d2c993d8 | 1088 | rp->cdev = NULL; |
dff59b64 | 1089 | dev_set_drvdata(&cdev->dev, NULL); |
d2c993d8 | 1090 | cdev->handler = NULL; |
1da177e4 LT |
1091 | |
1092 | /* Put ccw_device structure. */ | |
1093 | put_device(&cdev->dev); | |
1094 | ||
1095 | /* Now free raw3270 structure. */ | |
1096 | kfree(rp->ascebc); | |
1097 | kfree(rp); | |
1098 | } | |
1099 | ||
1100 | static int | |
1101 | raw3270_probe (struct ccw_device *cdev) | |
1102 | { | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Additional attributes for a 3270 device | |
1108 | */ | |
1109 | static ssize_t | |
3fd3c0a5 | 1110 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1111 | { |
1112 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1113 | ((struct raw3270 *) dev_get_drvdata(dev))->model); |
1da177e4 | 1114 | } |
d2c993d8 | 1115 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1116 | |
1117 | static ssize_t | |
3fd3c0a5 | 1118 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1119 | { |
1120 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1121 | ((struct raw3270 *) dev_get_drvdata(dev))->rows); |
1da177e4 | 1122 | } |
d2c993d8 | 1123 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1124 | |
1125 | static ssize_t | |
3fd3c0a5 | 1126 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1127 | { |
1128 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1129 | ((struct raw3270 *) dev_get_drvdata(dev))->cols); |
1da177e4 | 1130 | } |
d2c993d8 | 1131 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1132 | |
1133 | static struct attribute * raw3270_attrs[] = { | |
1134 | &dev_attr_model.attr, | |
1135 | &dev_attr_rows.attr, | |
1136 | &dev_attr_columns.attr, | |
1137 | NULL, | |
1138 | }; | |
1139 | ||
1140 | static struct attribute_group raw3270_attr_group = { | |
1141 | .attrs = raw3270_attrs, | |
1142 | }; | |
1143 | ||
d7cf0d57 | 1144 | static int raw3270_create_attributes(struct raw3270 *rp) |
1da177e4 | 1145 | { |
d7cf0d57 HC |
1146 | int rc; |
1147 | ||
1148 | rc = sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
1149 | if (rc) | |
1150 | goto out; | |
1151 | ||
ea9e42f6 GKH |
1152 | rp->clttydev = device_create(class3270, &rp->cdev->dev, |
1153 | MKDEV(IBM_TTY3270_MAJOR, rp->minor), NULL, | |
1154 | "tty%s", dev_name(&rp->cdev->dev)); | |
d7cf0d57 HC |
1155 | if (IS_ERR(rp->clttydev)) { |
1156 | rc = PTR_ERR(rp->clttydev); | |
1157 | goto out_ttydev; | |
1158 | } | |
1159 | ||
ea9e42f6 GKH |
1160 | rp->cltubdev = device_create(class3270, &rp->cdev->dev, |
1161 | MKDEV(IBM_FS3270_MAJOR, rp->minor), NULL, | |
1162 | "tub%s", dev_name(&rp->cdev->dev)); | |
d7cf0d57 HC |
1163 | if (!IS_ERR(rp->cltubdev)) |
1164 | goto out; | |
1165 | ||
1166 | rc = PTR_ERR(rp->cltubdev); | |
7f021ce1 | 1167 | device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); |
d7cf0d57 HC |
1168 | |
1169 | out_ttydev: | |
1170 | sysfs_remove_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
1171 | out: | |
1172 | return rc; | |
1da177e4 LT |
1173 | } |
1174 | ||
1175 | /* | |
1176 | * Notifier for device addition/removal | |
1177 | */ | |
1178 | struct raw3270_notifier { | |
1179 | struct list_head list; | |
1180 | void (*notifier)(int, int); | |
1181 | }; | |
1182 | ||
c11ca97e | 1183 | static LIST_HEAD(raw3270_notifier); |
1da177e4 LT |
1184 | |
1185 | int raw3270_register_notifier(void (*notifier)(int, int)) | |
1186 | { | |
1187 | struct raw3270_notifier *np; | |
1188 | struct raw3270 *rp; | |
1189 | ||
1190 | np = kmalloc(sizeof(struct raw3270_notifier), GFP_KERNEL); | |
1191 | if (!np) | |
1192 | return -ENOMEM; | |
1193 | np->notifier = notifier; | |
14cc3e2b | 1194 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1195 | list_add_tail(&np->list, &raw3270_notifier); |
1196 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1197 | get_device(&rp->cdev->dev); | |
1198 | notifier(rp->minor, 1); | |
1199 | } | |
14cc3e2b | 1200 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1201 | return 0; |
1202 | } | |
1203 | ||
1204 | void raw3270_unregister_notifier(void (*notifier)(int, int)) | |
1205 | { | |
1206 | struct raw3270_notifier *np; | |
1207 | ||
14cc3e2b | 1208 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1209 | list_for_each_entry(np, &raw3270_notifier, list) |
1210 | if (np->notifier == notifier) { | |
1211 | list_del(&np->list); | |
1212 | kfree(np); | |
1213 | break; | |
1214 | } | |
14cc3e2b | 1215 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | /* | |
1219 | * Set 3270 device online. | |
1220 | */ | |
1221 | static int | |
1222 | raw3270_set_online (struct ccw_device *cdev) | |
1223 | { | |
1224 | struct raw3270 *rp; | |
1225 | struct raw3270_notifier *np; | |
1226 | int rc; | |
1227 | ||
1228 | rp = raw3270_create_device(cdev); | |
1229 | if (IS_ERR(rp)) | |
1230 | return PTR_ERR(rp); | |
1231 | rc = raw3270_reset_device(rp); | |
1232 | if (rc) | |
ed3cb6f0 | 1233 | goto failure; |
1da177e4 LT |
1234 | rc = raw3270_size_device(rp); |
1235 | if (rc) | |
ed3cb6f0 | 1236 | goto failure; |
1da177e4 LT |
1237 | rc = raw3270_reset_device(rp); |
1238 | if (rc) | |
ed3cb6f0 | 1239 | goto failure; |
d7cf0d57 HC |
1240 | rc = raw3270_create_attributes(rp); |
1241 | if (rc) | |
1242 | goto failure; | |
1da177e4 | 1243 | set_bit(RAW3270_FLAGS_READY, &rp->flags); |
14cc3e2b | 1244 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1245 | list_for_each_entry(np, &raw3270_notifier, list) |
1246 | np->notifier(rp->minor, 1); | |
14cc3e2b | 1247 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1248 | return 0; |
ed3cb6f0 RH |
1249 | |
1250 | failure: | |
1251 | raw3270_delete_device(rp); | |
1252 | return rc; | |
1da177e4 LT |
1253 | } |
1254 | ||
1255 | /* | |
1256 | * Remove 3270 device structure. | |
1257 | */ | |
1258 | static void | |
1259 | raw3270_remove (struct ccw_device *cdev) | |
1260 | { | |
1261 | unsigned long flags; | |
1262 | struct raw3270 *rp; | |
1263 | struct raw3270_view *v; | |
1264 | struct raw3270_notifier *np; | |
1265 | ||
dff59b64 | 1266 | rp = dev_get_drvdata(&cdev->dev); |
ed3cb6f0 RH |
1267 | /* |
1268 | * _remove is the opposite of _probe; it's probe that | |
1269 | * should set up rp. raw3270_remove gets entered for | |
1270 | * devices even if they haven't been varied online. | |
1271 | * Thus, rp may validly be NULL here. | |
1272 | */ | |
1273 | if (rp == NULL) | |
1274 | return; | |
1da177e4 LT |
1275 | clear_bit(RAW3270_FLAGS_READY, &rp->flags); |
1276 | ||
1277 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1278 | ||
1279 | /* Deactivate current view and remove all views. */ | |
1280 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1281 | if (rp->view) { | |
1282 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1283 | rp->view = NULL; |
1da177e4 LT |
1284 | } |
1285 | while (!list_empty(&rp->view_list)) { | |
1286 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1287 | if (v->fn->release) | |
1288 | v->fn->release(v); | |
1289 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1290 | raw3270_del_view(v); | |
1291 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1292 | } | |
1293 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1294 | ||
14cc3e2b | 1295 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1296 | list_for_each_entry(np, &raw3270_notifier, list) |
1297 | np->notifier(rp->minor, 0); | |
14cc3e2b | 1298 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1299 | |
1300 | /* Reset 3270 device. */ | |
1301 | raw3270_reset_device(rp); | |
1302 | /* And finally remove it. */ | |
1303 | raw3270_delete_device(rp); | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Set 3270 device offline. | |
1308 | */ | |
1309 | static int | |
1310 | raw3270_set_offline (struct ccw_device *cdev) | |
1311 | { | |
1312 | struct raw3270 *rp; | |
1313 | ||
dff59b64 | 1314 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
1315 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) |
1316 | return -EBUSY; | |
1317 | raw3270_remove(cdev); | |
1318 | return 0; | |
1319 | } | |
1320 | ||
4b214a0c MS |
1321 | static int raw3270_pm_stop(struct ccw_device *cdev) |
1322 | { | |
1323 | struct raw3270 *rp; | |
1324 | struct raw3270_view *view; | |
1325 | unsigned long flags; | |
1326 | ||
4f0076f7 | 1327 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1328 | if (!rp) |
1329 | return 0; | |
1330 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1331 | if (rp->view) | |
1332 | rp->view->fn->deactivate(rp->view); | |
1333 | if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { | |
1334 | /* | |
1335 | * Release tty and fullscreen for all non-console | |
1336 | * devices. | |
1337 | */ | |
1338 | list_for_each_entry(view, &rp->view_list, list) { | |
1339 | if (view->fn->release) | |
1340 | view->fn->release(view); | |
1341 | } | |
1342 | } | |
1343 | set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1344 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static int raw3270_pm_start(struct ccw_device *cdev) | |
1349 | { | |
1350 | struct raw3270 *rp; | |
1351 | unsigned long flags; | |
1352 | ||
4f0076f7 | 1353 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1354 | if (!rp) |
1355 | return 0; | |
1356 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1357 | clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1358 | if (rp->view) | |
1359 | rp->view->fn->activate(rp->view); | |
1360 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | void raw3270_pm_unfreeze(struct raw3270_view *view) | |
1365 | { | |
34483cac | 1366 | #ifdef CONFIG_TN3270_CONSOLE |
4b214a0c MS |
1367 | struct raw3270 *rp; |
1368 | ||
1369 | rp = view->dev; | |
1370 | if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1371 | ccw_device_force_console(); | |
34483cac | 1372 | #endif |
4b214a0c MS |
1373 | } |
1374 | ||
1da177e4 LT |
1375 | static struct ccw_device_id raw3270_id[] = { |
1376 | { CCW_DEVICE(0x3270, 0) }, | |
1377 | { CCW_DEVICE(0x3271, 0) }, | |
1378 | { CCW_DEVICE(0x3272, 0) }, | |
1379 | { CCW_DEVICE(0x3273, 0) }, | |
1380 | { CCW_DEVICE(0x3274, 0) }, | |
1381 | { CCW_DEVICE(0x3275, 0) }, | |
1382 | { CCW_DEVICE(0x3276, 0) }, | |
1383 | { CCW_DEVICE(0x3277, 0) }, | |
1384 | { CCW_DEVICE(0x3278, 0) }, | |
1385 | { CCW_DEVICE(0x3279, 0) }, | |
1386 | { CCW_DEVICE(0x3174, 0) }, | |
1387 | { /* end of list */ }, | |
1388 | }; | |
1389 | ||
1390 | static struct ccw_driver raw3270_ccw_driver = { | |
3bda058b SO |
1391 | .driver = { |
1392 | .name = "3270", | |
1393 | .owner = THIS_MODULE, | |
1394 | }, | |
1da177e4 LT |
1395 | .ids = raw3270_id, |
1396 | .probe = &raw3270_probe, | |
1397 | .remove = &raw3270_remove, | |
1398 | .set_online = &raw3270_set_online, | |
1399 | .set_offline = &raw3270_set_offline, | |
4b214a0c MS |
1400 | .freeze = &raw3270_pm_stop, |
1401 | .thaw = &raw3270_pm_start, | |
1402 | .restore = &raw3270_pm_start, | |
1da177e4 LT |
1403 | }; |
1404 | ||
1405 | static int | |
1406 | raw3270_init(void) | |
1407 | { | |
1408 | struct raw3270 *rp; | |
1409 | int rc; | |
1410 | ||
1411 | if (raw3270_registered) | |
1412 | return 0; | |
1413 | raw3270_registered = 1; | |
1414 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1415 | if (rc == 0) { | |
1416 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1417 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1418 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1419 | list_for_each_entry(rp, &raw3270_devices, list) { |
1420 | get_device(&rp->cdev->dev); | |
1421 | raw3270_create_attributes(rp); | |
1422 | } | |
14cc3e2b | 1423 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1424 | } |
1425 | return rc; | |
1426 | } | |
1427 | ||
1428 | static void | |
1429 | raw3270_exit(void) | |
1430 | { | |
1431 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1432 | class_destroy(class3270); |
1da177e4 LT |
1433 | } |
1434 | ||
1435 | MODULE_LICENSE("GPL"); | |
1436 | ||
1437 | module_init(raw3270_init); | |
1438 | module_exit(raw3270_exit); | |
1439 | ||
1440 | EXPORT_SYMBOL(raw3270_request_alloc); | |
1441 | EXPORT_SYMBOL(raw3270_request_free); | |
1442 | EXPORT_SYMBOL(raw3270_request_reset); | |
1443 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1444 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1445 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1446 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1447 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1448 | EXPORT_SYMBOL(raw3270_add_view); | |
1449 | EXPORT_SYMBOL(raw3270_del_view); | |
1450 | EXPORT_SYMBOL(raw3270_find_view); | |
1451 | EXPORT_SYMBOL(raw3270_activate_view); | |
1452 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1453 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1454 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1455 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1456 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1457 | EXPORT_SYMBOL(raw3270_register_notifier); |
1458 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1459 | EXPORT_SYMBOL(raw3270_wait_queue); |