]>
Commit | Line | Data |
---|---|---|
6f05e69e | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
4b214a0c | 3 | * IBM/3270 Driver - core functions. |
1da177e4 | 4 | * |
4b214a0c MS |
5 | * Author(s): |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
9 | */ |
10 | ||
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 | |
c95571e6 | 32 | 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; | |
4d334fd1 | 41 | unsigned int state; |
1da177e4 LT |
42 | unsigned long flags; |
43 | ||
44 | struct list_head req_queue; /* Request queue. */ | |
45 | struct list_head view_list; /* List of available views. */ | |
46 | struct raw3270_view *view; /* Active view. */ | |
47 | ||
48 | struct timer_list timer; /* Device timer. */ | |
49 | ||
50 | unsigned char *ascebc; /* ascii -> ebcdic table */ | |
132fab13 | 51 | |
4d334fd1 MS |
52 | struct raw3270_view init_view; |
53 | struct raw3270_request init_reset; | |
54 | struct raw3270_request init_readpart; | |
55 | struct raw3270_request init_readmod; | |
132fab13 | 56 | unsigned char init_data[256]; |
1da177e4 LT |
57 | }; |
58 | ||
4d334fd1 MS |
59 | /* raw3270->state */ |
60 | #define RAW3270_STATE_INIT 0 /* Initial state */ | |
61 | #define RAW3270_STATE_RESET 1 /* Reset command is pending */ | |
62 | #define RAW3270_STATE_W4ATTN 2 /* Wait for attention interrupt */ | |
63 | #define RAW3270_STATE_READMOD 3 /* Read partition is pending */ | |
64 | #define RAW3270_STATE_READY 4 /* Device is usable by views */ | |
65 | ||
1da177e4 LT |
66 | /* raw3270->flags */ |
67 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ | |
68 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ | |
4d334fd1 | 69 | #define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */ |
1da177e4 LT |
70 | |
71 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ | |
14cc3e2b | 72 | static DEFINE_MUTEX(raw3270_mutex); |
1da177e4 LT |
73 | |
74 | /* List of 3270 devices. */ | |
c11ca97e | 75 | static 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 | */ | |
82 | static int raw3270_registered; | |
83 | ||
84 | /* Module parameters */ | |
970ba6ac | 85 | static bool tubxcorrect; |
1da177e4 LT |
86 | module_param(tubxcorrect, bool, 0); |
87 | ||
88 | /* | |
89 | * Wait queue for device init/delete, view delete. | |
90 | */ | |
91 | DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); | |
92 | ||
7e36eff1 MS |
93 | static void __raw3270_disconnect(struct raw3270 *rp); |
94 | ||
1da177e4 LT |
95 | /* |
96 | * Encode array for 12 bit 3270 addresses. | |
97 | */ | |
2b67fc46 | 98 | static unsigned char raw3270_ebcgraf[64] = { |
1da177e4 LT |
99 | 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, |
100 | 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
101 | 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
102 | 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, | |
103 | 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
104 | 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
105 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
106 | 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f | |
107 | }; | |
108 | ||
4d334fd1 MS |
109 | static inline int raw3270_state_ready(struct raw3270 *rp) |
110 | { | |
111 | return rp->state == RAW3270_STATE_READY; | |
112 | } | |
113 | ||
114 | static inline int raw3270_state_final(struct raw3270 *rp) | |
115 | { | |
116 | return rp->state == RAW3270_STATE_INIT || | |
117 | rp->state == RAW3270_STATE_READY; | |
118 | } | |
119 | ||
1da177e4 LT |
120 | void |
121 | raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) | |
122 | { | |
123 | if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { | |
124 | cp[0] = (addr >> 8) & 0x3f; | |
125 | cp[1] = addr & 0xff; | |
126 | } else { | |
127 | cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; | |
128 | cp[1] = raw3270_ebcgraf[addr & 0x3f]; | |
129 | } | |
130 | } | |
131 | ||
132 | /* | |
133 | * Allocate a new 3270 ccw request | |
134 | */ | |
135 | struct raw3270_request * | |
136 | raw3270_request_alloc(size_t size) | |
137 | { | |
138 | struct raw3270_request *rq; | |
139 | ||
140 | /* Allocate request structure */ | |
88abaab4 | 141 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
142 | if (!rq) |
143 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
144 | |
145 | /* alloc output buffer. */ | |
146 | if (size > 0) { | |
147 | rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
148 | if (!rq->buffer) { | |
149 | kfree(rq); | |
150 | return ERR_PTR(-ENOMEM); | |
151 | } | |
152 | } | |
153 | rq->size = size; | |
154 | INIT_LIST_HEAD(&rq->list); | |
155 | ||
156 | /* | |
157 | * Setup ccw. | |
158 | */ | |
159 | rq->ccw.cda = __pa(rq->buffer); | |
160 | rq->ccw.flags = CCW_FLAG_SLI; | |
161 | ||
162 | return rq; | |
163 | } | |
164 | ||
1da177e4 LT |
165 | /* |
166 | * Free 3270 ccw request | |
167 | */ | |
168 | void | |
169 | raw3270_request_free (struct raw3270_request *rq) | |
170 | { | |
17fd682e | 171 | kfree(rq->buffer); |
1da177e4 LT |
172 | kfree(rq); |
173 | } | |
174 | ||
175 | /* | |
176 | * Reset request to initial state. | |
177 | */ | |
178 | void | |
179 | raw3270_request_reset(struct raw3270_request *rq) | |
180 | { | |
181 | BUG_ON(!list_empty(&rq->list)); | |
182 | rq->ccw.cmd_code = 0; | |
183 | rq->ccw.count = 0; | |
184 | rq->ccw.cda = __pa(rq->buffer); | |
185 | rq->ccw.flags = CCW_FLAG_SLI; | |
186 | rq->rescnt = 0; | |
187 | rq->rc = 0; | |
188 | } | |
189 | ||
190 | /* | |
191 | * Set command code to ccw of a request. | |
192 | */ | |
193 | void | |
194 | raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) | |
195 | { | |
196 | rq->ccw.cmd_code = cmd; | |
197 | } | |
198 | ||
199 | /* | |
200 | * Add data fragment to output buffer. | |
201 | */ | |
202 | int | |
203 | raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) | |
204 | { | |
205 | if (size + rq->ccw.count > rq->size) | |
206 | return -E2BIG; | |
207 | memcpy(rq->buffer + rq->ccw.count, data, size); | |
208 | rq->ccw.count += size; | |
209 | return 0; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Set address/length pair to ccw of a request. | |
214 | */ | |
215 | void | |
216 | raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) | |
217 | { | |
218 | rq->ccw.cda = __pa(data); | |
219 | rq->ccw.count = size; | |
220 | } | |
221 | ||
222 | /* | |
223 | * Set idal buffer to ccw of a request. | |
224 | */ | |
225 | void | |
226 | raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) | |
227 | { | |
228 | rq->ccw.cda = __pa(ib->data); | |
229 | rq->ccw.count = ib->size; | |
230 | rq->ccw.flags |= CCW_FLAG_IDA; | |
231 | } | |
232 | ||
1da177e4 LT |
233 | /* |
234 | * Add the request to the request queue, try to start it if the | |
235 | * 3270 device is idle. Return without waiting for end of i/o. | |
236 | */ | |
237 | static int | |
238 | __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, | |
239 | struct raw3270_request *rq) | |
240 | { | |
241 | rq->view = view; | |
242 | raw3270_get_view(view); | |
243 | if (list_empty(&rp->req_queue) && | |
244 | !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
245 | /* No other requests are on the queue. Start this one. */ | |
246 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
247 | (unsigned long) rq, 0, 0); | |
248 | if (rq->rc) { | |
249 | raw3270_put_view(view); | |
250 | return rq->rc; | |
251 | } | |
252 | } | |
253 | list_add_tail(&rq->list, &rp->req_queue); | |
254 | return 0; | |
233faec9 MS |
255 | } |
256 | ||
257 | int | |
258 | raw3270_view_active(struct raw3270_view *view) | |
259 | { | |
260 | struct raw3270 *rp = view->dev; | |
261 | ||
1cf69b7b | 262 | return rp && rp->view == view; |
1da177e4 LT |
263 | } |
264 | ||
265 | int | |
266 | raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) | |
267 | { | |
268 | unsigned long flags; | |
269 | struct raw3270 *rp; | |
270 | int rc; | |
271 | ||
272 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
273 | rp = view->dev; | |
1cf69b7b | 274 | if (!rp || rp->view != view) |
1da177e4 | 275 | rc = -EACCES; |
4d334fd1 MS |
276 | else if (!raw3270_state_ready(rp)) |
277 | rc = -EBUSY; | |
1da177e4 LT |
278 | else |
279 | rc = __raw3270_start(rp, view, rq); | |
280 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
281 | return rc; | |
282 | } | |
283 | ||
ed3cb6f0 RH |
284 | int |
285 | raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) | |
286 | { | |
287 | struct raw3270 *rp; | |
288 | int rc; | |
289 | ||
290 | rp = view->dev; | |
1cf69b7b | 291 | if (!rp || rp->view != view) |
ed3cb6f0 | 292 | rc = -EACCES; |
4d334fd1 MS |
293 | else if (!raw3270_state_ready(rp)) |
294 | rc = -EBUSY; | |
ed3cb6f0 RH |
295 | else |
296 | rc = __raw3270_start(rp, view, rq); | |
297 | return rc; | |
298 | } | |
299 | ||
1da177e4 LT |
300 | int |
301 | raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) | |
302 | { | |
303 | struct raw3270 *rp; | |
304 | ||
305 | rp = view->dev; | |
306 | rq->view = view; | |
307 | raw3270_get_view(view); | |
308 | list_add_tail(&rq->list, &rp->req_queue); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | /* | |
313 | * 3270 interrupt routine, called from the ccw_device layer | |
314 | */ | |
315 | static void | |
316 | raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
317 | { | |
318 | struct raw3270 *rp; | |
319 | struct raw3270_view *view; | |
320 | struct raw3270_request *rq; | |
1da177e4 | 321 | |
dff59b64 | 322 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
323 | if (!rp) |
324 | return; | |
325 | rq = (struct raw3270_request *) intparm; | |
326 | view = rq ? rq->view : rp->view; | |
327 | ||
8340ab60 | 328 | if (!IS_ERR(irb)) { |
1da177e4 | 329 | /* Handle CE-DE-UE and subsequent UDE */ |
8340ab60 | 330 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) |
1da177e4 | 331 | clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
8340ab60 MS |
332 | if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | |
333 | DEV_STAT_DEV_END | | |
334 | DEV_STAT_UNIT_EXCEP)) | |
335 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); | |
336 | /* Handle disconnected devices */ | |
337 | if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && | |
7e36eff1 | 338 | (irb->ecw[0] & SNS0_INTERVENTION_REQ)) { |
8340ab60 | 339 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
7e36eff1 MS |
340 | if (rp->state > RAW3270_STATE_RESET) |
341 | __raw3270_disconnect(rp); | |
342 | } | |
8340ab60 MS |
343 | /* Call interrupt handler of the view */ |
344 | if (view) | |
345 | view->fn->intv(view, rq, irb); | |
346 | } | |
1da177e4 | 347 | |
8340ab60 MS |
348 | if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) |
349 | /* Device busy, do not start I/O */ | |
1da177e4 | 350 | return; |
8340ab60 | 351 | |
7e36eff1 | 352 | if (rq && !list_empty(&rq->list)) { |
1da177e4 LT |
353 | /* The request completed, remove from queue and do callback. */ |
354 | list_del_init(&rq->list); | |
355 | if (rq->callback) | |
356 | rq->callback(rq, rq->callback_data); | |
357 | /* Do put_device for get_device in raw3270_start. */ | |
358 | raw3270_put_view(view); | |
359 | } | |
8340ab60 | 360 | |
1da177e4 LT |
361 | /* |
362 | * Try to start each request on request queue until one is | |
363 | * started successful. | |
364 | */ | |
365 | while (!list_empty(&rp->req_queue)) { | |
366 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
367 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
368 | (unsigned long) rq, 0, 0); | |
369 | if (rq->rc == 0) | |
370 | break; | |
371 | /* Start failed. Remove request and do callback. */ | |
372 | list_del_init(&rq->list); | |
373 | if (rq->callback) | |
374 | rq->callback(rq, rq->callback_data); | |
375 | /* Do put_device for get_device in raw3270_start. */ | |
376 | raw3270_put_view(view); | |
377 | } | |
378 | } | |
379 | ||
380 | /* | |
4d334fd1 MS |
381 | * To determine the size of the 3270 device we need to do: |
382 | * 1) send a 'read partition' data stream to the device | |
383 | * 2) wait for the attn interrupt that precedes the query reply | |
384 | * 3) do a read modified to get the query reply | |
385 | * To make things worse we have to cope with intervention | |
386 | * required (3270 device switched to 'stand-by') and command | |
387 | * rejects (old devices that can't do 'read partition'). | |
1da177e4 | 388 | */ |
1da177e4 LT |
389 | struct raw3270_ua { /* Query Reply structure for Usable Area */ |
390 | struct { /* Usable Area Query Reply Base */ | |
391 | short l; /* Length of this structured field */ | |
392 | char sfid; /* 0x81 if Query Reply */ | |
393 | char qcode; /* 0x81 if Usable Area */ | |
394 | char flags0; | |
395 | char flags1; | |
396 | short w; /* Width of usable area */ | |
397 | short h; /* Heigth of usavle area */ | |
398 | char units; /* 0x00:in; 0x01:mm */ | |
399 | int xr; | |
400 | int yr; | |
401 | char aw; | |
402 | char ah; | |
403 | short buffsz; /* Character buffer size, bytes */ | |
404 | char xmin; | |
405 | char ymin; | |
406 | char xmax; | |
407 | char ymax; | |
408 | } __attribute__ ((packed)) uab; | |
409 | struct { /* Alternate Usable Area Self-Defining Parameter */ | |
410 | char l; /* Length of this Self-Defining Parm */ | |
411 | char sdpid; /* 0x02 if Alternate Usable Area */ | |
412 | char res; | |
413 | char auaid; /* 0x01 is Id for the A U A */ | |
414 | short wauai; /* Width of AUAi */ | |
415 | short hauai; /* Height of AUAi */ | |
416 | char auaunits; /* 0x00:in, 0x01:mm */ | |
417 | int auaxr; | |
418 | int auayr; | |
419 | char awauai; | |
420 | char ahauai; | |
421 | } __attribute__ ((packed)) aua; | |
422 | } __attribute__ ((packed)); | |
423 | ||
1da177e4 | 424 | static void |
4d334fd1 | 425 | raw3270_size_device_vm(struct raw3270 *rp) |
1da177e4 LT |
426 | { |
427 | int rc, model; | |
9a92fe48 | 428 | struct ccw_dev_id dev_id; |
4d334fd1 | 429 | struct diag210 diag_data; |
1da177e4 | 430 | |
9a92fe48 | 431 | ccw_device_get_id(rp->cdev, &dev_id); |
4d334fd1 MS |
432 | diag_data.vrdcdvno = dev_id.devno; |
433 | diag_data.vrdclen = sizeof(struct diag210); | |
434 | rc = diag210(&diag_data); | |
435 | model = diag_data.vrdccrmd; | |
436 | /* Use default model 2 if the size could not be detected */ | |
437 | if (rc || model < 2 || model > 5) | |
438 | model = 2; | |
1da177e4 LT |
439 | switch (model) { |
440 | case 2: | |
441 | rp->model = model; | |
442 | rp->rows = 24; | |
443 | rp->cols = 80; | |
444 | break; | |
445 | case 3: | |
446 | rp->model = model; | |
447 | rp->rows = 32; | |
448 | rp->cols = 80; | |
449 | break; | |
450 | case 4: | |
451 | rp->model = model; | |
452 | rp->rows = 43; | |
453 | rp->cols = 80; | |
454 | break; | |
455 | case 5: | |
456 | rp->model = model; | |
457 | rp->rows = 27; | |
458 | rp->cols = 132; | |
459 | break; | |
1da177e4 | 460 | } |
1da177e4 LT |
461 | } |
462 | ||
4d334fd1 MS |
463 | static void |
464 | raw3270_size_device(struct raw3270 *rp) | |
1da177e4 | 465 | { |
1da177e4 | 466 | struct raw3270_ua *uap; |
1da177e4 | 467 | |
1da177e4 | 468 | /* Got a Query Reply */ |
132fab13 | 469 | uap = (struct raw3270_ua *) (rp->init_data + 1); |
1da177e4 | 470 | /* Paranoia check. */ |
4d334fd1 MS |
471 | if (rp->init_readmod.rc || rp->init_data[0] != 0x88 || |
472 | uap->uab.qcode != 0x81) { | |
473 | /* Couldn't detect size. Use default model 2. */ | |
474 | rp->model = 2; | |
475 | rp->rows = 24; | |
476 | rp->cols = 80; | |
477 | return; | |
478 | } | |
1da177e4 LT |
479 | /* Copy rows/columns of default Usable Area */ |
480 | rp->rows = uap->uab.h; | |
481 | rp->cols = uap->uab.w; | |
482 | /* Check for 14 bit addressing */ | |
483 | if ((uap->uab.flags0 & 0x0d) == 0x01) | |
484 | set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); | |
485 | /* Check for Alternate Usable Area */ | |
486 | if (uap->uab.l == sizeof(struct raw3270_ua) && | |
487 | uap->aua.sdpid == 0x02) { | |
488 | rp->rows = uap->aua.hauai; | |
489 | rp->cols = uap->aua.wauai; | |
490 | } | |
4d334fd1 MS |
491 | /* Try to find a model. */ |
492 | rp->model = 0; | |
493 | if (rp->rows == 24 && rp->cols == 80) | |
494 | rp->model = 2; | |
495 | if (rp->rows == 32 && rp->cols == 80) | |
496 | rp->model = 3; | |
497 | if (rp->rows == 43 && rp->cols == 80) | |
498 | rp->model = 4; | |
499 | if (rp->rows == 27 && rp->cols == 132) | |
500 | rp->model = 5; | |
1da177e4 LT |
501 | } |
502 | ||
4d334fd1 MS |
503 | static void |
504 | raw3270_size_device_done(struct raw3270 *rp) | |
1da177e4 | 505 | { |
4d334fd1 | 506 | struct raw3270_view *view; |
1da177e4 | 507 | |
d2c993d8 | 508 | rp->view = NULL; |
4d334fd1 MS |
509 | rp->state = RAW3270_STATE_READY; |
510 | /* Notify views about new size */ | |
511 | list_for_each_entry(view, &rp->view_list, list) | |
512 | if (view->fn->resize) | |
513 | view->fn->resize(view, rp->model, rp->rows, rp->cols); | |
514 | /* Setup processing done, now activate a view */ | |
515 | list_for_each_entry(view, &rp->view_list, list) { | |
516 | rp->view = view; | |
517 | if (view->fn->activate(view) == 0) | |
518 | break; | |
519 | rp->view = NULL; | |
1da177e4 | 520 | } |
4d334fd1 MS |
521 | } |
522 | ||
523 | static void | |
524 | raw3270_read_modified_cb(struct raw3270_request *rq, void *data) | |
525 | { | |
526 | struct raw3270 *rp = rq->view->dev; | |
527 | ||
528 | raw3270_size_device(rp); | |
529 | raw3270_size_device_done(rp); | |
530 | } | |
531 | ||
532 | static void | |
533 | raw3270_read_modified(struct raw3270 *rp) | |
534 | { | |
535 | if (rp->state != RAW3270_STATE_W4ATTN) | |
536 | return; | |
537 | /* Use 'read modified' to get the result of a read partition. */ | |
538 | memset(&rp->init_readmod, 0, sizeof(rp->init_readmod)); | |
539 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
540 | rp->init_readmod.ccw.cmd_code = TC_READMOD; | |
541 | rp->init_readmod.ccw.flags = CCW_FLAG_SLI; | |
542 | rp->init_readmod.ccw.count = sizeof(rp->init_data); | |
543 | rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data); | |
544 | rp->init_readmod.callback = raw3270_read_modified_cb; | |
545 | rp->state = RAW3270_STATE_READMOD; | |
546 | raw3270_start_irq(&rp->init_view, &rp->init_readmod); | |
547 | } | |
548 | ||
549 | static void | |
550 | raw3270_writesf_readpart(struct raw3270 *rp) | |
551 | { | |
552 | static const unsigned char wbuf[] = | |
553 | { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; | |
554 | ||
555 | /* Store 'read partition' data stream to init_data */ | |
556 | memset(&rp->init_readpart, 0, sizeof(rp->init_readpart)); | |
557 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
558 | memcpy(&rp->init_data, wbuf, sizeof(wbuf)); | |
559 | rp->init_readpart.ccw.cmd_code = TC_WRITESF; | |
560 | rp->init_readpart.ccw.flags = CCW_FLAG_SLI; | |
561 | rp->init_readpart.ccw.count = sizeof(wbuf); | |
562 | rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data); | |
563 | rp->state = RAW3270_STATE_W4ATTN; | |
564 | raw3270_start_irq(&rp->init_view, &rp->init_readpart); | |
565 | } | |
566 | ||
567 | /* | |
568 | * Device reset | |
569 | */ | |
570 | static void | |
571 | raw3270_reset_device_cb(struct raw3270_request *rq, void *data) | |
572 | { | |
573 | struct raw3270 *rp = rq->view->dev; | |
574 | ||
575 | if (rp->state != RAW3270_STATE_RESET) | |
576 | return; | |
dc3ac5ff | 577 | if (rq->rc) { |
4d334fd1 MS |
578 | /* Reset command failed. */ |
579 | rp->state = RAW3270_STATE_INIT; | |
01a7cfa2 | 580 | } else if (MACHINE_IS_VM) { |
4d334fd1 MS |
581 | raw3270_size_device_vm(rp); |
582 | raw3270_size_device_done(rp); | |
583 | } else | |
584 | raw3270_writesf_readpart(rp); | |
bd1cb5de | 585 | memset(&rp->init_reset, 0, sizeof(rp->init_reset)); |
1da177e4 LT |
586 | } |
587 | ||
588 | static int | |
4d334fd1 | 589 | __raw3270_reset_device(struct raw3270 *rp) |
1da177e4 LT |
590 | { |
591 | int rc; | |
592 | ||
bd1cb5de MS |
593 | /* Check if reset is already pending */ |
594 | if (rp->init_reset.view) | |
595 | return -EBUSY; | |
4d334fd1 | 596 | /* Store reset data stream to init_data/init_reset */ |
132fab13 | 597 | rp->init_data[0] = TW_KR; |
4d334fd1 MS |
598 | rp->init_reset.ccw.cmd_code = TC_EWRITEA; |
599 | rp->init_reset.ccw.flags = CCW_FLAG_SLI; | |
600 | rp->init_reset.ccw.count = 1; | |
601 | rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data); | |
602 | rp->init_reset.callback = raw3270_reset_device_cb; | |
603 | rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset); | |
604 | if (rc == 0 && rp->state == RAW3270_STATE_INIT) | |
605 | rp->state = RAW3270_STATE_RESET; | |
606 | return rc; | |
607 | } | |
608 | ||
609 | static int | |
610 | raw3270_reset_device(struct raw3270 *rp) | |
611 | { | |
612 | unsigned long flags; | |
613 | int rc; | |
614 | ||
615 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
616 | rc = __raw3270_reset_device(rp); | |
617 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1da177e4 LT |
618 | return rc; |
619 | } | |
620 | ||
ed3cb6f0 RH |
621 | int |
622 | raw3270_reset(struct raw3270_view *view) | |
623 | { | |
624 | struct raw3270 *rp; | |
625 | int rc; | |
626 | ||
627 | rp = view->dev; | |
1cf69b7b | 628 | if (!rp || rp->view != view) |
ed3cb6f0 | 629 | rc = -EACCES; |
4d334fd1 MS |
630 | else if (!raw3270_state_ready(rp)) |
631 | rc = -EBUSY; | |
ed3cb6f0 RH |
632 | else |
633 | rc = raw3270_reset_device(view->dev); | |
634 | return rc; | |
635 | } | |
636 | ||
7e36eff1 MS |
637 | static void |
638 | __raw3270_disconnect(struct raw3270 *rp) | |
639 | { | |
640 | struct raw3270_request *rq; | |
641 | struct raw3270_view *view; | |
642 | ||
643 | rp->state = RAW3270_STATE_INIT; | |
644 | rp->view = &rp->init_view; | |
645 | /* Cancel all queued requests */ | |
646 | while (!list_empty(&rp->req_queue)) { | |
647 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
648 | view = rq->view; | |
649 | rq->rc = -EACCES; | |
650 | list_del_init(&rq->list); | |
651 | if (rq->callback) | |
652 | rq->callback(rq, rq->callback_data); | |
653 | raw3270_put_view(view); | |
654 | } | |
655 | /* Start from scratch */ | |
656 | __raw3270_reset_device(rp); | |
657 | } | |
658 | ||
8340ab60 | 659 | static void |
4d334fd1 MS |
660 | raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, |
661 | struct irb *irb) | |
662 | { | |
663 | struct raw3270 *rp; | |
664 | ||
4d334fd1 MS |
665 | if (rq) { |
666 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
667 | if (irb->ecw[0] & SNS0_CMD_REJECT) | |
668 | rq->rc = -EOPNOTSUPP; | |
669 | else | |
670 | rq->rc = -EIO; | |
671 | } | |
672 | } | |
673 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { | |
674 | /* Queue read modified after attention interrupt */ | |
675 | rp = view->dev; | |
676 | raw3270_read_modified(rp); | |
677 | } | |
4d334fd1 MS |
678 | } |
679 | ||
680 | static struct raw3270_fn raw3270_init_fn = { | |
681 | .intv = raw3270_init_irq | |
682 | }; | |
683 | ||
1da177e4 LT |
684 | /* |
685 | * Setup new 3270 device. | |
686 | */ | |
687 | static int | |
688 | raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) | |
689 | { | |
690 | struct list_head *l; | |
691 | struct raw3270 *tmp; | |
692 | int minor; | |
693 | ||
694 | memset(rp, 0, sizeof(struct raw3270)); | |
695 | /* Copy ebcdic -> ascii translation table. */ | |
696 | memcpy(ascebc, _ascebc, 256); | |
697 | if (tubxcorrect) { | |
698 | /* correct brackets and circumflex */ | |
699 | ascebc['['] = 0xad; | |
700 | ascebc[']'] = 0xbd; | |
701 | ascebc['^'] = 0xb0; | |
702 | } | |
703 | rp->ascebc = ascebc; | |
704 | ||
705 | /* Set defaults. */ | |
706 | rp->rows = 24; | |
707 | rp->cols = 80; | |
708 | ||
709 | INIT_LIST_HEAD(&rp->req_queue); | |
710 | INIT_LIST_HEAD(&rp->view_list); | |
711 | ||
4d334fd1 MS |
712 | rp->init_view.dev = rp; |
713 | rp->init_view.fn = &raw3270_init_fn; | |
714 | rp->view = &rp->init_view; | |
715 | ||
1da177e4 LT |
716 | /* |
717 | * Add device to list and find the smallest unused minor | |
ed3cb6f0 RH |
718 | * number for it. Note: there is no device with minor 0, |
719 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 720 | */ |
14cc3e2b | 721 | mutex_lock(&raw3270_mutex); |
1da177e4 | 722 | /* Keep the list sorted. */ |
ed3cb6f0 | 723 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
724 | rp->minor = -1; |
725 | list_for_each(l, &raw3270_devices) { | |
726 | tmp = list_entry(l, struct raw3270, list); | |
727 | if (tmp->minor > minor) { | |
728 | rp->minor = minor; | |
729 | __list_add(&rp->list, l->prev, l); | |
730 | break; | |
731 | } | |
732 | minor++; | |
733 | } | |
ed3cb6f0 | 734 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
735 | rp->minor = minor; |
736 | list_add_tail(&rp->list, &raw3270_devices); | |
737 | } | |
14cc3e2b | 738 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
739 | /* No free minor number? Then give up. */ |
740 | if (rp->minor == -1) | |
741 | return -EUSERS; | |
742 | rp->cdev = cdev; | |
dff59b64 | 743 | dev_set_drvdata(&cdev->dev, rp); |
1da177e4 LT |
744 | cdev->handler = raw3270_irq; |
745 | return 0; | |
746 | } | |
747 | ||
748 | #ifdef CONFIG_TN3270_CONSOLE | |
2253e8d7 SO |
749 | /* Tentative definition - see below for actual definition. */ |
750 | static struct ccw_driver raw3270_ccw_driver; | |
751 | ||
1da177e4 LT |
752 | /* |
753 | * Setup 3270 device configured as console. | |
754 | */ | |
2253e8d7 | 755 | struct raw3270 __init *raw3270_setup_console(void) |
1da177e4 | 756 | { |
2253e8d7 | 757 | struct ccw_device *cdev; |
4d334fd1 | 758 | unsigned long flags; |
1da177e4 LT |
759 | struct raw3270 *rp; |
760 | char *ascebc; | |
761 | int rc; | |
762 | ||
1e532096 | 763 | cdev = ccw_device_create_console(&raw3270_ccw_driver); |
2253e8d7 SO |
764 | if (IS_ERR(cdev)) |
765 | return ERR_CAST(cdev); | |
766 | ||
33403dcf HC |
767 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
768 | ascebc = kzalloc(256, GFP_KERNEL); | |
1da177e4 LT |
769 | rc = raw3270_setup_device(cdev, rp, ascebc); |
770 | if (rc) | |
771 | return ERR_PTR(rc); | |
772 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
1e532096 SO |
773 | |
774 | rc = ccw_device_enable_console(cdev); | |
775 | if (rc) { | |
776 | ccw_device_destroy_console(cdev); | |
777 | return ERR_PTR(rc); | |
778 | } | |
779 | ||
4d334fd1 MS |
780 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
781 | do { | |
782 | __raw3270_reset_device(rp); | |
783 | while (!raw3270_state_final(rp)) { | |
188561a4 | 784 | ccw_device_wait_idle(rp->cdev); |
4d334fd1 MS |
785 | barrier(); |
786 | } | |
787 | } while (rp->state != RAW3270_STATE_READY); | |
788 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1da177e4 LT |
789 | return rp; |
790 | } | |
791 | ||
792 | void | |
793 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
794 | { | |
795 | unsigned long flags; | |
796 | ||
797 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
188561a4 | 798 | ccw_device_wait_idle(rp->cdev); |
1da177e4 LT |
799 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
800 | } | |
801 | ||
802 | #endif | |
803 | ||
804 | /* | |
805 | * Create a 3270 device structure. | |
806 | */ | |
807 | static struct raw3270 * | |
808 | raw3270_create_device(struct ccw_device *cdev) | |
809 | { | |
810 | struct raw3270 *rp; | |
811 | char *ascebc; | |
812 | int rc; | |
813 | ||
bd1cb5de | 814 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
815 | if (!rp) |
816 | return ERR_PTR(-ENOMEM); | |
817 | ascebc = kmalloc(256, GFP_KERNEL); | |
818 | if (!ascebc) { | |
819 | kfree(rp); | |
820 | return ERR_PTR(-ENOMEM); | |
821 | } | |
822 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
823 | if (rc) { | |
824 | kfree(rp->ascebc); | |
825 | kfree(rp); | |
826 | rp = ERR_PTR(rc); | |
827 | } | |
828 | /* Get reference to ccw_device structure. */ | |
829 | get_device(&cdev->dev); | |
830 | return rp; | |
831 | } | |
832 | ||
833 | /* | |
834 | * Activate a view. | |
835 | */ | |
836 | int | |
837 | raw3270_activate_view(struct raw3270_view *view) | |
838 | { | |
839 | struct raw3270 *rp; | |
840 | struct raw3270_view *oldview, *nv; | |
841 | unsigned long flags; | |
842 | int rc; | |
843 | ||
844 | rp = view->dev; | |
845 | if (!rp) | |
846 | return -ENODEV; | |
847 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
848 | if (rp->view == view) | |
849 | rc = 0; | |
4d334fd1 MS |
850 | else if (!raw3270_state_ready(rp)) |
851 | rc = -EBUSY; | |
1da177e4 | 852 | else { |
d2c993d8 | 853 | oldview = NULL; |
4d334fd1 | 854 | if (rp->view && rp->view->fn->deactivate) { |
1da177e4 LT |
855 | oldview = rp->view; |
856 | oldview->fn->deactivate(oldview); | |
857 | } | |
858 | rp->view = view; | |
859 | rc = view->fn->activate(view); | |
860 | if (rc) { | |
861 | /* Didn't work. Try to reactivate the old view. */ | |
862 | rp->view = oldview; | |
863 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
864 | /* Didn't work as well. Try any other view. */ | |
865 | list_for_each_entry(nv, &rp->view_list, list) | |
866 | if (nv != view && nv != oldview) { | |
867 | rp->view = nv; | |
868 | if (nv->fn->activate(nv) == 0) | |
869 | break; | |
d2c993d8 | 870 | rp->view = NULL; |
1da177e4 LT |
871 | } |
872 | } | |
873 | } | |
874 | } | |
875 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
876 | return rc; | |
877 | } | |
878 | ||
879 | /* | |
880 | * Deactivate current view. | |
881 | */ | |
882 | void | |
883 | raw3270_deactivate_view(struct raw3270_view *view) | |
884 | { | |
885 | unsigned long flags; | |
886 | struct raw3270 *rp; | |
887 | ||
888 | rp = view->dev; | |
889 | if (!rp) | |
890 | return; | |
891 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
892 | if (rp->view == view) { | |
893 | view->fn->deactivate(view); | |
d2c993d8 | 894 | rp->view = NULL; |
1da177e4 LT |
895 | /* Move deactivated view to end of list. */ |
896 | list_del_init(&view->list); | |
897 | list_add_tail(&view->list, &rp->view_list); | |
898 | /* Try to activate another view. */ | |
1cf69b7b | 899 | if (raw3270_state_ready(rp)) { |
ed3cb6f0 RH |
900 | list_for_each_entry(view, &rp->view_list, list) { |
901 | rp->view = view; | |
902 | if (view->fn->activate(view) == 0) | |
1da177e4 | 903 | break; |
d2c993d8 | 904 | rp->view = NULL; |
ed3cb6f0 | 905 | } |
1da177e4 LT |
906 | } |
907 | } | |
908 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
909 | } | |
910 | ||
911 | /* | |
912 | * Add view to device with minor "minor". | |
913 | */ | |
914 | int | |
5712f330 | 915 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor, int subclass) |
1da177e4 LT |
916 | { |
917 | unsigned long flags; | |
918 | struct raw3270 *rp; | |
919 | int rc; | |
920 | ||
ed3cb6f0 RH |
921 | if (minor <= 0) |
922 | return -ENODEV; | |
14cc3e2b | 923 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
924 | rc = -ENODEV; |
925 | list_for_each_entry(rp, &raw3270_devices, list) { | |
926 | if (rp->minor != minor) | |
927 | continue; | |
928 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 MS |
929 | atomic_set(&view->ref_count, 2); |
930 | view->dev = rp; | |
931 | view->fn = fn; | |
932 | view->model = rp->model; | |
933 | view->rows = rp->rows; | |
934 | view->cols = rp->cols; | |
935 | view->ascebc = rp->ascebc; | |
936 | spin_lock_init(&view->lock); | |
5712f330 | 937 | lockdep_set_subclass(&view->lock, subclass); |
4d334fd1 MS |
938 | list_add(&view->list, &rp->view_list); |
939 | rc = 0; | |
1da177e4 LT |
940 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
941 | break; | |
942 | } | |
14cc3e2b | 943 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
944 | return rc; |
945 | } | |
946 | ||
947 | /* | |
948 | * Find specific view of device with minor "minor". | |
949 | */ | |
950 | struct raw3270_view * | |
951 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
952 | { | |
953 | struct raw3270 *rp; | |
954 | struct raw3270_view *view, *tmp; | |
955 | unsigned long flags; | |
956 | ||
14cc3e2b | 957 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
958 | view = ERR_PTR(-ENODEV); |
959 | list_for_each_entry(rp, &raw3270_devices, list) { | |
960 | if (rp->minor != minor) | |
961 | continue; | |
962 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 MS |
963 | list_for_each_entry(tmp, &rp->view_list, list) { |
964 | if (tmp->fn == fn) { | |
965 | raw3270_get_view(tmp); | |
966 | view = tmp; | |
967 | break; | |
1da177e4 LT |
968 | } |
969 | } | |
970 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
971 | break; | |
972 | } | |
14cc3e2b | 973 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
974 | return view; |
975 | } | |
976 | ||
977 | /* | |
978 | * Remove view from device and free view structure via call to view->fn->free. | |
979 | */ | |
980 | void | |
981 | raw3270_del_view(struct raw3270_view *view) | |
982 | { | |
983 | unsigned long flags; | |
984 | struct raw3270 *rp; | |
985 | struct raw3270_view *nv; | |
986 | ||
987 | rp = view->dev; | |
988 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
989 | if (rp->view == view) { | |
990 | view->fn->deactivate(view); | |
d2c993d8 | 991 | rp->view = NULL; |
1da177e4 LT |
992 | } |
993 | list_del_init(&view->list); | |
1cf69b7b | 994 | if (!rp->view && raw3270_state_ready(rp)) { |
1da177e4 LT |
995 | /* Try to activate another view. */ |
996 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 997 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
998 | rp->view = nv; |
999 | break; | |
1000 | } | |
1001 | } | |
1002 | } | |
1003 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1004 | /* Wait for reference counter to drop to zero. */ | |
1005 | atomic_dec(&view->ref_count); | |
1006 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1007 | if (view->fn->free) | |
1008 | view->fn->free(view); | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Remove a 3270 device structure. | |
1013 | */ | |
1014 | static void | |
1015 | raw3270_delete_device(struct raw3270 *rp) | |
1016 | { | |
1017 | struct ccw_device *cdev; | |
1018 | ||
1019 | /* Remove from device chain. */ | |
14cc3e2b | 1020 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1021 | list_del_init(&rp->list); |
14cc3e2b | 1022 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1023 | |
1024 | /* Disconnect from ccw_device. */ | |
1025 | cdev = rp->cdev; | |
d2c993d8 | 1026 | rp->cdev = NULL; |
dff59b64 | 1027 | dev_set_drvdata(&cdev->dev, NULL); |
d2c993d8 | 1028 | cdev->handler = NULL; |
1da177e4 LT |
1029 | |
1030 | /* Put ccw_device structure. */ | |
1031 | put_device(&cdev->dev); | |
1032 | ||
1033 | /* Now free raw3270 structure. */ | |
1034 | kfree(rp->ascebc); | |
1035 | kfree(rp); | |
1036 | } | |
1037 | ||
1038 | static int | |
1039 | raw3270_probe (struct ccw_device *cdev) | |
1040 | { | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Additional attributes for a 3270 device | |
1046 | */ | |
1047 | static ssize_t | |
3fd3c0a5 | 1048 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1049 | { |
1050 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1051 | ((struct raw3270 *) dev_get_drvdata(dev))->model); |
1da177e4 | 1052 | } |
d2c993d8 | 1053 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1054 | |
1055 | static ssize_t | |
3fd3c0a5 | 1056 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1057 | { |
1058 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1059 | ((struct raw3270 *) dev_get_drvdata(dev))->rows); |
1da177e4 | 1060 | } |
d2c993d8 | 1061 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1062 | |
1063 | static ssize_t | |
3fd3c0a5 | 1064 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1065 | { |
1066 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1067 | ((struct raw3270 *) dev_get_drvdata(dev))->cols); |
1da177e4 | 1068 | } |
d2c993d8 | 1069 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1070 | |
1071 | static struct attribute * raw3270_attrs[] = { | |
1072 | &dev_attr_model.attr, | |
1073 | &dev_attr_rows.attr, | |
1074 | &dev_attr_columns.attr, | |
1075 | NULL, | |
1076 | }; | |
1077 | ||
cb0259ca | 1078 | static const struct attribute_group raw3270_attr_group = { |
1da177e4 LT |
1079 | .attrs = raw3270_attrs, |
1080 | }; | |
1081 | ||
d7cf0d57 | 1082 | static int raw3270_create_attributes(struct raw3270 *rp) |
1da177e4 | 1083 | { |
c95571e6 | 1084 | return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); |
1da177e4 LT |
1085 | } |
1086 | ||
1087 | /* | |
1088 | * Notifier for device addition/removal | |
1089 | */ | |
c11ca97e | 1090 | static LIST_HEAD(raw3270_notifier); |
1da177e4 | 1091 | |
c95571e6 | 1092 | int raw3270_register_notifier(struct raw3270_notifier *notifier) |
1da177e4 | 1093 | { |
1da177e4 LT |
1094 | struct raw3270 *rp; |
1095 | ||
14cc3e2b | 1096 | mutex_lock(&raw3270_mutex); |
c95571e6 MS |
1097 | list_add_tail(¬ifier->list, &raw3270_notifier); |
1098 | list_for_each_entry(rp, &raw3270_devices, list) | |
1099 | notifier->create(rp->minor); | |
14cc3e2b | 1100 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1101 | return 0; |
1102 | } | |
1103 | ||
c95571e6 | 1104 | void raw3270_unregister_notifier(struct raw3270_notifier *notifier) |
1da177e4 | 1105 | { |
c95571e6 | 1106 | struct raw3270 *rp; |
1da177e4 | 1107 | |
14cc3e2b | 1108 | mutex_lock(&raw3270_mutex); |
c95571e6 MS |
1109 | list_for_each_entry(rp, &raw3270_devices, list) |
1110 | notifier->destroy(rp->minor); | |
1111 | list_del(¬ifier->list); | |
14cc3e2b | 1112 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1113 | } |
1114 | ||
1115 | /* | |
1116 | * Set 3270 device online. | |
1117 | */ | |
1118 | static int | |
1119 | raw3270_set_online (struct ccw_device *cdev) | |
1120 | { | |
1da177e4 | 1121 | struct raw3270_notifier *np; |
c95571e6 | 1122 | struct raw3270 *rp; |
1da177e4 LT |
1123 | int rc; |
1124 | ||
1125 | rp = raw3270_create_device(cdev); | |
1126 | if (IS_ERR(rp)) | |
1127 | return PTR_ERR(rp); | |
d7cf0d57 HC |
1128 | rc = raw3270_create_attributes(rp); |
1129 | if (rc) | |
1130 | goto failure; | |
4d334fd1 | 1131 | raw3270_reset_device(rp); |
14cc3e2b | 1132 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1133 | list_for_each_entry(np, &raw3270_notifier, list) |
c95571e6 | 1134 | np->create(rp->minor); |
14cc3e2b | 1135 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1136 | return 0; |
ed3cb6f0 RH |
1137 | |
1138 | failure: | |
1139 | raw3270_delete_device(rp); | |
1140 | return rc; | |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | /* | |
1144 | * Remove 3270 device structure. | |
1145 | */ | |
1146 | static void | |
1147 | raw3270_remove (struct ccw_device *cdev) | |
1148 | { | |
1149 | unsigned long flags; | |
1150 | struct raw3270 *rp; | |
1151 | struct raw3270_view *v; | |
1152 | struct raw3270_notifier *np; | |
1153 | ||
dff59b64 | 1154 | rp = dev_get_drvdata(&cdev->dev); |
ed3cb6f0 RH |
1155 | /* |
1156 | * _remove is the opposite of _probe; it's probe that | |
1157 | * should set up rp. raw3270_remove gets entered for | |
1158 | * devices even if they haven't been varied online. | |
1159 | * Thus, rp may validly be NULL here. | |
1160 | */ | |
1161 | if (rp == NULL) | |
1162 | return; | |
1da177e4 LT |
1163 | |
1164 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1165 | ||
1166 | /* Deactivate current view and remove all views. */ | |
1167 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1168 | if (rp->view) { | |
4d334fd1 MS |
1169 | if (rp->view->fn->deactivate) |
1170 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1171 | rp->view = NULL; |
1da177e4 LT |
1172 | } |
1173 | while (!list_empty(&rp->view_list)) { | |
1174 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1175 | if (v->fn->release) | |
1176 | v->fn->release(v); | |
1177 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1178 | raw3270_del_view(v); | |
1179 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1180 | } | |
1181 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1182 | ||
14cc3e2b | 1183 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1184 | list_for_each_entry(np, &raw3270_notifier, list) |
c95571e6 | 1185 | np->destroy(rp->minor); |
14cc3e2b | 1186 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1187 | |
1188 | /* Reset 3270 device. */ | |
1189 | raw3270_reset_device(rp); | |
1190 | /* And finally remove it. */ | |
1191 | raw3270_delete_device(rp); | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * Set 3270 device offline. | |
1196 | */ | |
1197 | static int | |
1198 | raw3270_set_offline (struct ccw_device *cdev) | |
1199 | { | |
1200 | struct raw3270 *rp; | |
1201 | ||
dff59b64 | 1202 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
1203 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) |
1204 | return -EBUSY; | |
1205 | raw3270_remove(cdev); | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | static struct ccw_device_id raw3270_id[] = { | |
1210 | { CCW_DEVICE(0x3270, 0) }, | |
1211 | { CCW_DEVICE(0x3271, 0) }, | |
1212 | { CCW_DEVICE(0x3272, 0) }, | |
1213 | { CCW_DEVICE(0x3273, 0) }, | |
1214 | { CCW_DEVICE(0x3274, 0) }, | |
1215 | { CCW_DEVICE(0x3275, 0) }, | |
1216 | { CCW_DEVICE(0x3276, 0) }, | |
1217 | { CCW_DEVICE(0x3277, 0) }, | |
1218 | { CCW_DEVICE(0x3278, 0) }, | |
1219 | { CCW_DEVICE(0x3279, 0) }, | |
1220 | { CCW_DEVICE(0x3174, 0) }, | |
1221 | { /* end of list */ }, | |
1222 | }; | |
1223 | ||
1224 | static struct ccw_driver raw3270_ccw_driver = { | |
3bda058b SO |
1225 | .driver = { |
1226 | .name = "3270", | |
1227 | .owner = THIS_MODULE, | |
1228 | }, | |
1da177e4 LT |
1229 | .ids = raw3270_id, |
1230 | .probe = &raw3270_probe, | |
1231 | .remove = &raw3270_remove, | |
1232 | .set_online = &raw3270_set_online, | |
1233 | .set_offline = &raw3270_set_offline, | |
420f42ec | 1234 | .int_class = IRQIO_C70, |
1da177e4 LT |
1235 | }; |
1236 | ||
1237 | static int | |
1238 | raw3270_init(void) | |
1239 | { | |
1240 | struct raw3270 *rp; | |
1241 | int rc; | |
1242 | ||
1243 | if (raw3270_registered) | |
1244 | return 0; | |
1245 | raw3270_registered = 1; | |
1246 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1247 | if (rc == 0) { | |
1248 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1249 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1250 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1251 | list_for_each_entry(rp, &raw3270_devices, list) { |
1252 | get_device(&rp->cdev->dev); | |
1253 | raw3270_create_attributes(rp); | |
1254 | } | |
14cc3e2b | 1255 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1256 | } |
1257 | return rc; | |
1258 | } | |
1259 | ||
1260 | static void | |
1261 | raw3270_exit(void) | |
1262 | { | |
1263 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1264 | class_destroy(class3270); |
1da177e4 LT |
1265 | } |
1266 | ||
1267 | MODULE_LICENSE("GPL"); | |
1268 | ||
1269 | module_init(raw3270_init); | |
1270 | module_exit(raw3270_exit); | |
1271 | ||
c95571e6 | 1272 | EXPORT_SYMBOL(class3270); |
1da177e4 LT |
1273 | EXPORT_SYMBOL(raw3270_request_alloc); |
1274 | EXPORT_SYMBOL(raw3270_request_free); | |
1275 | EXPORT_SYMBOL(raw3270_request_reset); | |
1276 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1277 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1278 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1279 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1280 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1281 | EXPORT_SYMBOL(raw3270_add_view); | |
1282 | EXPORT_SYMBOL(raw3270_del_view); | |
1283 | EXPORT_SYMBOL(raw3270_find_view); | |
1284 | EXPORT_SYMBOL(raw3270_activate_view); | |
1285 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1286 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1287 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1288 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1289 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1290 | EXPORT_SYMBOL(raw3270_register_notifier); |
1291 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1292 | EXPORT_SYMBOL(raw3270_wait_queue); |