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8bff05b0 SR |
1 | /* |
2 | * iSeries vio driver interface to hvc_console.c | |
3 | * | |
4 | * This code is based heavily on hvc_vio.c and viocons.c | |
5 | * | |
6 | * Copyright (C) 2006 Stephen Rothwell, IBM Corporation | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | #include <stdarg.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/console.h> | |
28 | ||
29 | #include <asm/hvconsole.h> | |
30 | #include <asm/vio.h> | |
31 | #include <asm/prom.h> | |
32 | #include <asm/iseries/vio.h> | |
33 | #include <asm/iseries/hv_call.h> | |
34 | #include <asm/iseries/hv_lp_config.h> | |
35 | #include <asm/iseries/hv_lp_event.h> | |
36 | ||
37 | #include "hvc_console.h" | |
38 | ||
39 | #define VTTY_PORTS 10 | |
40 | ||
41 | static DEFINE_SPINLOCK(consolelock); | |
42 | static DEFINE_SPINLOCK(consoleloglock); | |
43 | ||
44 | static const char hvc_driver_name[] = "hvc_console"; | |
45 | ||
46 | #define IN_BUF_SIZE 200 | |
47 | ||
48 | /* | |
49 | * Our port information. | |
50 | */ | |
51 | static struct port_info { | |
52 | HvLpIndex lp; | |
53 | u64 seq; /* sequence number of last HV send */ | |
54 | u64 ack; /* last ack from HV */ | |
55 | struct hvc_struct *hp; | |
56 | int in_start; | |
57 | int in_end; | |
58 | unsigned char in_buf[IN_BUF_SIZE]; | |
59 | } port_info[VTTY_PORTS] = { | |
60 | [ 0 ... VTTY_PORTS - 1 ] = { | |
61 | .lp = HvLpIndexInvalid | |
62 | } | |
63 | }; | |
64 | ||
65 | #define viochar_is_console(pi) ((pi) == &port_info[0]) | |
66 | ||
67 | static struct vio_device_id hvc_driver_table[] __devinitdata = { | |
68 | {"serial", "IBM,iSeries-vty"}, | |
69 | { "", "" } | |
70 | }; | |
71 | MODULE_DEVICE_TABLE(vio, hvc_driver_table); | |
72 | ||
73 | static void hvlog(char *fmt, ...) | |
74 | { | |
75 | int i; | |
76 | unsigned long flags; | |
77 | va_list args; | |
78 | static char buf[256]; | |
79 | ||
80 | spin_lock_irqsave(&consoleloglock, flags); | |
81 | va_start(args, fmt); | |
82 | i = vscnprintf(buf, sizeof(buf) - 1, fmt, args); | |
83 | va_end(args); | |
84 | buf[i++] = '\r'; | |
85 | HvCall_writeLogBuffer(buf, i); | |
86 | spin_unlock_irqrestore(&consoleloglock, flags); | |
87 | } | |
88 | ||
89 | /* | |
90 | * Initialize the common fields in a charLpEvent | |
91 | */ | |
92 | static void init_data_event(struct viocharlpevent *viochar, HvLpIndex lp) | |
93 | { | |
94 | struct HvLpEvent *hev = &viochar->event; | |
95 | ||
96 | memset(viochar, 0, sizeof(struct viocharlpevent)); | |
97 | ||
98 | hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DEFERRED_ACK | | |
99 | HV_LP_EVENT_INT; | |
100 | hev->xType = HvLpEvent_Type_VirtualIo; | |
101 | hev->xSubtype = viomajorsubtype_chario | viochardata; | |
102 | hev->xSourceLp = HvLpConfig_getLpIndex(); | |
103 | hev->xTargetLp = lp; | |
104 | hev->xSizeMinus1 = sizeof(struct viocharlpevent); | |
105 | hev->xSourceInstanceId = viopath_sourceinst(lp); | |
106 | hev->xTargetInstanceId = viopath_targetinst(lp); | |
107 | } | |
108 | ||
109 | static int get_chars(uint32_t vtermno, char *buf, int count) | |
110 | { | |
111 | struct port_info *pi; | |
112 | int n = 0; | |
113 | unsigned long flags; | |
114 | ||
115 | if (vtermno >= VTTY_PORTS) | |
116 | return -EINVAL; | |
117 | if (count == 0) | |
118 | return 0; | |
119 | ||
120 | pi = &port_info[vtermno]; | |
121 | spin_lock_irqsave(&consolelock, flags); | |
122 | ||
123 | if (pi->in_end == 0) | |
124 | goto done; | |
125 | ||
126 | n = pi->in_end - pi->in_start; | |
127 | if (n > count) | |
128 | n = count; | |
129 | memcpy(buf, &pi->in_buf[pi->in_start], n); | |
130 | pi->in_start += n; | |
131 | if (pi->in_start == pi->in_end) { | |
132 | pi->in_start = 0; | |
133 | pi->in_end = 0; | |
134 | } | |
135 | done: | |
136 | spin_unlock_irqrestore(&consolelock, flags); | |
137 | return n; | |
138 | } | |
139 | ||
140 | static int put_chars(uint32_t vtermno, const char *buf, int count) | |
141 | { | |
142 | struct viocharlpevent *viochar; | |
143 | struct port_info *pi; | |
144 | HvLpEvent_Rc hvrc; | |
145 | unsigned long flags; | |
146 | int sent = 0; | |
147 | ||
148 | if (vtermno >= VTTY_PORTS) | |
149 | return -EINVAL; | |
150 | ||
151 | pi = &port_info[vtermno]; | |
152 | ||
153 | spin_lock_irqsave(&consolelock, flags); | |
154 | ||
155 | if (viochar_is_console(pi) && !viopath_isactive(pi->lp)) { | |
156 | spin_lock_irqsave(&consoleloglock, flags); | |
157 | HvCall_writeLogBuffer(buf, count); | |
158 | spin_unlock_irqrestore(&consoleloglock, flags); | |
159 | sent = count; | |
160 | goto done; | |
161 | } | |
162 | ||
163 | viochar = vio_get_event_buffer(viomajorsubtype_chario); | |
164 | if (viochar == NULL) { | |
165 | hvlog("\n\rviocons: Can't get viochar buffer."); | |
166 | goto done; | |
167 | } | |
168 | ||
169 | while ((count > 0) && ((pi->seq - pi->ack) < VIOCHAR_WINDOW)) { | |
170 | int len; | |
171 | ||
172 | len = (count > VIOCHAR_MAX_DATA) ? VIOCHAR_MAX_DATA : count; | |
173 | ||
174 | if (viochar_is_console(pi)) { | |
175 | spin_lock_irqsave(&consoleloglock, flags); | |
176 | HvCall_writeLogBuffer(buf, len); | |
177 | spin_unlock_irqrestore(&consoleloglock, flags); | |
178 | } | |
179 | ||
180 | init_data_event(viochar, pi->lp); | |
181 | ||
182 | viochar->len = len; | |
183 | viochar->event.xCorrelationToken = pi->seq++; | |
184 | viochar->event.xSizeMinus1 = | |
185 | offsetof(struct viocharlpevent, data) + len; | |
186 | ||
187 | memcpy(viochar->data, buf, len); | |
188 | ||
189 | hvrc = HvCallEvent_signalLpEvent(&viochar->event); | |
190 | if (hvrc) | |
191 | hvlog("\n\rerror sending event! return code %d\n\r", | |
192 | (int)hvrc); | |
193 | sent += len; | |
194 | count -= len; | |
195 | buf += len; | |
196 | } | |
197 | ||
198 | vio_free_event_buffer(viomajorsubtype_chario, viochar); | |
199 | done: | |
200 | spin_unlock_irqrestore(&consolelock, flags); | |
201 | return sent; | |
202 | } | |
203 | ||
204 | static struct hv_ops hvc_get_put_ops = { | |
205 | .get_chars = get_chars, | |
206 | .put_chars = put_chars, | |
207 | }; | |
208 | ||
209 | static int __devinit hvc_vio_probe(struct vio_dev *vdev, | |
210 | const struct vio_device_id *id) | |
211 | { | |
212 | struct hvc_struct *hp; | |
213 | struct port_info *pi; | |
214 | ||
215 | /* probed with invalid parameters. */ | |
216 | if (!vdev || !id) | |
217 | return -EPERM; | |
218 | ||
219 | if (vdev->unit_address >= VTTY_PORTS) | |
220 | return -ENODEV; | |
221 | ||
222 | pi = &port_info[vdev->unit_address]; | |
223 | ||
224 | hp = hvc_alloc(vdev->unit_address, vdev->irq, &hvc_get_put_ops); | |
225 | if (IS_ERR(hp)) | |
226 | return PTR_ERR(hp); | |
227 | pi->hp = hp; | |
228 | dev_set_drvdata(&vdev->dev, pi); | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static int __devexit hvc_vio_remove(struct vio_dev *vdev) | |
234 | { | |
235 | struct port_info *pi = dev_get_drvdata(&vdev->dev); | |
236 | struct hvc_struct *hp = pi->hp; | |
237 | ||
238 | return hvc_remove(hp); | |
239 | } | |
240 | ||
241 | static struct vio_driver hvc_vio_driver = { | |
242 | .id_table = hvc_driver_table, | |
243 | .probe = hvc_vio_probe, | |
244 | .remove = hvc_vio_remove, | |
245 | .driver = { | |
246 | .name = hvc_driver_name, | |
247 | .owner = THIS_MODULE, | |
248 | } | |
249 | }; | |
250 | ||
251 | static void hvc_open_event(struct HvLpEvent *event) | |
252 | { | |
253 | unsigned long flags; | |
254 | struct viocharlpevent *cevent = (struct viocharlpevent *)event; | |
255 | u8 port = cevent->virtual_device; | |
256 | struct port_info *pi; | |
257 | int reject = 0; | |
258 | ||
259 | if (hvlpevent_is_ack(event)) { | |
260 | if (port >= VTTY_PORTS) | |
261 | return; | |
262 | ||
263 | spin_lock_irqsave(&consolelock, flags); | |
264 | ||
265 | pi = &port_info[port]; | |
266 | if (event->xRc == HvLpEvent_Rc_Good) { | |
267 | pi->seq = pi->ack = 0; | |
268 | /* | |
269 | * This line allows connections from the primary | |
270 | * partition but once one is connected from the | |
271 | * primary partition nothing short of a reboot | |
272 | * of linux will allow access from the hosting | |
273 | * partition again without a required iSeries fix. | |
274 | */ | |
275 | pi->lp = event->xTargetLp; | |
276 | } | |
277 | ||
278 | spin_unlock_irqrestore(&consolelock, flags); | |
279 | if (event->xRc != HvLpEvent_Rc_Good) | |
280 | printk(KERN_WARNING | |
281 | "hvc: handle_open_event: event->xRc == (%d).\n", | |
282 | event->xRc); | |
283 | ||
284 | if (event->xCorrelationToken != 0) { | |
285 | atomic_t *aptr= (atomic_t *)event->xCorrelationToken; | |
286 | atomic_set(aptr, 1); | |
287 | } else | |
288 | printk(KERN_WARNING | |
289 | "hvc: weird...got open ack without atomic\n"); | |
290 | return; | |
291 | } | |
292 | ||
293 | /* This had better require an ack, otherwise complain */ | |
294 | if (!hvlpevent_need_ack(event)) { | |
295 | printk(KERN_WARNING "hvc: viocharopen without ack bit!\n"); | |
296 | return; | |
297 | } | |
298 | ||
299 | spin_lock_irqsave(&consolelock, flags); | |
300 | ||
301 | /* Make sure this is a good virtual tty */ | |
302 | if (port >= VTTY_PORTS) { | |
303 | event->xRc = HvLpEvent_Rc_SubtypeError; | |
304 | cevent->subtype_result_code = viorc_openRejected; | |
305 | /* | |
306 | * Flag state here since we can't printk while holding | |
307 | * the consolelock spinlock. | |
308 | */ | |
309 | reject = 1; | |
310 | } else { | |
311 | pi = &port_info[port]; | |
312 | if ((pi->lp != HvLpIndexInvalid) && | |
313 | (pi->lp != event->xSourceLp)) { | |
314 | /* | |
315 | * If this is tty is already connected to a different | |
316 | * partition, fail. | |
317 | */ | |
318 | event->xRc = HvLpEvent_Rc_SubtypeError; | |
319 | cevent->subtype_result_code = viorc_openRejected; | |
320 | reject = 2; | |
321 | } else { | |
322 | pi->lp = event->xSourceLp; | |
323 | event->xRc = HvLpEvent_Rc_Good; | |
324 | cevent->subtype_result_code = viorc_good; | |
325 | pi->seq = pi->ack = 0; | |
326 | } | |
327 | } | |
328 | ||
329 | spin_unlock_irqrestore(&consolelock, flags); | |
330 | ||
331 | if (reject == 1) | |
332 | printk(KERN_WARNING "hvc: open rejected: bad virtual tty.\n"); | |
333 | else if (reject == 2) | |
334 | printk(KERN_WARNING "hvc: open rejected: console in exclusive " | |
335 | "use by another partition.\n"); | |
336 | ||
337 | /* Return the acknowledgement */ | |
338 | HvCallEvent_ackLpEvent(event); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Handle a close charLpEvent. This should ONLY be an Interrupt because the | |
343 | * virtual console should never actually issue a close event to the hypervisor | |
344 | * because the virtual console never goes away. A close event coming from the | |
345 | * hypervisor simply means that there are no client consoles connected to the | |
346 | * virtual console. | |
347 | */ | |
348 | static void hvc_close_event(struct HvLpEvent *event) | |
349 | { | |
350 | unsigned long flags; | |
351 | struct viocharlpevent *cevent = (struct viocharlpevent *)event; | |
352 | u8 port = cevent->virtual_device; | |
353 | ||
354 | if (!hvlpevent_is_int(event)) { | |
355 | printk(KERN_WARNING | |
356 | "hvc: got unexpected close acknowlegement\n"); | |
357 | return; | |
358 | } | |
359 | ||
360 | if (port >= VTTY_PORTS) { | |
361 | printk(KERN_WARNING | |
362 | "hvc: close message from invalid virtual device.\n"); | |
363 | return; | |
364 | } | |
365 | ||
366 | /* For closes, just mark the console partition invalid */ | |
367 | spin_lock_irqsave(&consolelock, flags); | |
368 | ||
369 | if (port_info[port].lp == event->xSourceLp) | |
370 | port_info[port].lp = HvLpIndexInvalid; | |
371 | ||
372 | spin_unlock_irqrestore(&consolelock, flags); | |
373 | } | |
374 | ||
375 | static void hvc_data_event(struct HvLpEvent *event) | |
376 | { | |
377 | unsigned long flags; | |
378 | struct viocharlpevent *cevent = (struct viocharlpevent *)event; | |
379 | struct port_info *pi; | |
380 | int n; | |
381 | u8 port = cevent->virtual_device; | |
382 | ||
383 | if (port >= VTTY_PORTS) { | |
384 | printk(KERN_WARNING "hvc: data on invalid virtual device %d\n", | |
385 | port); | |
386 | return; | |
387 | } | |
388 | if (cevent->len == 0) | |
389 | return; | |
390 | ||
391 | /* | |
392 | * Change 05/01/2003 - Ryan Arnold: If a partition other than | |
393 | * the current exclusive partition tries to send us data | |
394 | * events then just drop them on the floor because we don't | |
395 | * want his stinking data. He isn't authorized to receive | |
396 | * data because he wasn't the first one to get the console, | |
397 | * therefore he shouldn't be allowed to send data either. | |
398 | * This will work without an iSeries fix. | |
399 | */ | |
400 | pi = &port_info[port]; | |
401 | if (pi->lp != event->xSourceLp) | |
402 | return; | |
403 | ||
404 | spin_lock_irqsave(&consolelock, flags); | |
405 | ||
406 | n = IN_BUF_SIZE - pi->in_end; | |
407 | if (n > cevent->len) | |
408 | n = cevent->len; | |
409 | if (n > 0) { | |
410 | memcpy(&pi->in_buf[pi->in_end], cevent->data, n); | |
411 | pi->in_end += n; | |
412 | } | |
413 | spin_unlock_irqrestore(&consolelock, flags); | |
414 | if (n == 0) | |
415 | printk(KERN_WARNING "hvc: input buffer overflow\n"); | |
416 | } | |
417 | ||
418 | static void hvc_ack_event(struct HvLpEvent *event) | |
419 | { | |
420 | struct viocharlpevent *cevent = (struct viocharlpevent *)event; | |
421 | unsigned long flags; | |
422 | u8 port = cevent->virtual_device; | |
423 | ||
424 | if (port >= VTTY_PORTS) { | |
425 | printk(KERN_WARNING "hvc: data on invalid virtual device\n"); | |
426 | return; | |
427 | } | |
428 | ||
429 | spin_lock_irqsave(&consolelock, flags); | |
430 | port_info[port].ack = event->xCorrelationToken; | |
431 | spin_unlock_irqrestore(&consolelock, flags); | |
432 | } | |
433 | ||
434 | static void hvc_config_event(struct HvLpEvent *event) | |
435 | { | |
436 | struct viocharlpevent *cevent = (struct viocharlpevent *)event; | |
437 | ||
438 | if (cevent->data[0] == 0x01) | |
439 | printk(KERN_INFO "hvc: window resized to %d: %d: %d: %d\n", | |
440 | cevent->data[1], cevent->data[2], | |
441 | cevent->data[3], cevent->data[4]); | |
442 | else | |
443 | printk(KERN_WARNING "hvc: unknown config event\n"); | |
444 | } | |
445 | ||
446 | static void hvc_handle_event(struct HvLpEvent *event) | |
447 | { | |
448 | int charminor; | |
449 | ||
450 | if (event == NULL) | |
451 | return; | |
452 | ||
453 | charminor = event->xSubtype & VIOMINOR_SUBTYPE_MASK; | |
454 | switch (charminor) { | |
455 | case viocharopen: | |
456 | hvc_open_event(event); | |
457 | break; | |
458 | case viocharclose: | |
459 | hvc_close_event(event); | |
460 | break; | |
461 | case viochardata: | |
462 | hvc_data_event(event); | |
463 | break; | |
464 | case viocharack: | |
465 | hvc_ack_event(event); | |
466 | break; | |
467 | case viocharconfig: | |
468 | hvc_config_event(event); | |
469 | break; | |
470 | default: | |
471 | if (hvlpevent_is_int(event) && hvlpevent_need_ack(event)) { | |
472 | event->xRc = HvLpEvent_Rc_InvalidSubtype; | |
473 | HvCallEvent_ackLpEvent(event); | |
474 | } | |
475 | } | |
476 | } | |
477 | ||
478 | static int send_open(HvLpIndex remoteLp, void *sem) | |
479 | { | |
480 | return HvCallEvent_signalLpEventFast(remoteLp, | |
481 | HvLpEvent_Type_VirtualIo, | |
482 | viomajorsubtype_chario | viocharopen, | |
483 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
484 | viopath_sourceinst(remoteLp), | |
485 | viopath_targetinst(remoteLp), | |
486 | (u64)(unsigned long)sem, VIOVERSION << 16, | |
487 | 0, 0, 0, 0); | |
488 | } | |
489 | ||
490 | static int hvc_vio_init(void) | |
491 | { | |
492 | atomic_t wait_flag; | |
493 | int rc; | |
494 | ||
495 | /* +2 for fudge */ | |
496 | rc = viopath_open(HvLpConfig_getPrimaryLpIndex(), | |
497 | viomajorsubtype_chario, VIOCHAR_WINDOW + 2); | |
498 | if (rc) | |
499 | printk(KERN_WARNING "hvc: error opening to primary %d\n", rc); | |
500 | ||
501 | if (viopath_hostLp == HvLpIndexInvalid) | |
502 | vio_set_hostlp(); | |
503 | ||
504 | /* | |
505 | * And if the primary is not the same as the hosting LP, open to the | |
506 | * hosting lp | |
507 | */ | |
508 | if ((viopath_hostLp != HvLpIndexInvalid) && | |
509 | (viopath_hostLp != HvLpConfig_getPrimaryLpIndex())) { | |
510 | printk(KERN_INFO "hvc: open path to hosting (%d)\n", | |
511 | viopath_hostLp); | |
512 | rc = viopath_open(viopath_hostLp, viomajorsubtype_chario, | |
513 | VIOCHAR_WINDOW + 2); /* +2 for fudge */ | |
514 | if (rc) | |
515 | printk(KERN_WARNING | |
516 | "error opening to partition %d: %d\n", | |
517 | viopath_hostLp, rc); | |
518 | } | |
519 | ||
520 | if (vio_setHandler(viomajorsubtype_chario, hvc_handle_event) < 0) | |
521 | printk(KERN_WARNING | |
522 | "hvc: error seting handler for console events!\n"); | |
523 | ||
524 | /* | |
525 | * First, try to open the console to the hosting lp. | |
526 | * Wait on a semaphore for the response. | |
527 | */ | |
528 | atomic_set(&wait_flag, 0); | |
529 | if ((viopath_isactive(viopath_hostLp)) && | |
530 | (send_open(viopath_hostLp, &wait_flag) == 0)) { | |
531 | printk(KERN_INFO "hvc: hosting partition %d\n", viopath_hostLp); | |
532 | while (atomic_read(&wait_flag) == 0) | |
533 | mb(); | |
534 | atomic_set(&wait_flag, 0); | |
535 | } | |
536 | ||
537 | /* | |
538 | * If we don't have an active console, try the primary | |
539 | */ | |
540 | if ((!viopath_isactive(port_info[0].lp)) && | |
541 | (viopath_isactive(HvLpConfig_getPrimaryLpIndex())) && | |
542 | (send_open(HvLpConfig_getPrimaryLpIndex(), &wait_flag) == 0)) { | |
543 | printk(KERN_INFO "hvc: opening console to primary partition\n"); | |
544 | while (atomic_read(&wait_flag) == 0) | |
545 | mb(); | |
546 | } | |
547 | ||
548 | /* Register as a vio device to receive callbacks */ | |
549 | rc = vio_register_driver(&hvc_vio_driver); | |
550 | ||
551 | return rc; | |
552 | } | |
553 | module_init(hvc_vio_init); /* after drivers/char/hvc_console.c */ | |
554 | ||
555 | static void hvc_vio_exit(void) | |
556 | { | |
557 | vio_unregister_driver(&hvc_vio_driver); | |
558 | } | |
559 | module_exit(hvc_vio_exit); | |
560 | ||
561 | /* the device tree order defines our numbering */ | |
562 | static int hvc_find_vtys(void) | |
563 | { | |
564 | struct device_node *vty; | |
565 | int num_found = 0; | |
566 | ||
567 | for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL; | |
568 | vty = of_find_node_by_name(vty, "vty")) { | |
569 | uint32_t *vtermno; | |
570 | ||
571 | /* We have statically defined space for only a certain number | |
572 | * of console adapters. | |
573 | */ | |
574 | if ((num_found >= MAX_NR_HVC_CONSOLES) || | |
575 | (num_found >= VTTY_PORTS)) | |
576 | break; | |
577 | ||
578 | vtermno = (uint32_t *)get_property(vty, "reg", NULL); | |
579 | if (!vtermno) | |
580 | continue; | |
581 | ||
582 | if (!device_is_compatible(vty, "IBM,iSeries-vty")) | |
583 | continue; | |
584 | ||
585 | if (num_found == 0) | |
586 | add_preferred_console("hvc", 0, NULL); | |
587 | hvc_instantiate(*vtermno, num_found, &hvc_get_put_ops); | |
588 | ++num_found; | |
589 | } | |
590 | ||
591 | return num_found; | |
592 | } | |
593 | console_initcall(hvc_find_vtys); |