xref: /netbsd-src/sys/dev/wscons/wsdisplay_compat_usl.c (revision 274254cdae52594c1aa480a736aef78313d15c9c) 
1 /* $NetBSD: wsdisplay_compat_usl.c,v 1.45 2008/04/24 15:35:28 ad Exp $ */
2 
3 /*
4  * Copyright (c) 1998
5  *	Matthias Drochner.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  *
27  */
28 
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: wsdisplay_compat_usl.c,v 1.45 2008/04/24 15:35:28 ad Exp $");
31 
32 #include "opt_compat_freebsd.h"
33 #include "opt_compat_netbsd.h"
34 
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/callout.h>
38 #include <sys/ioctl.h>
39 #include <sys/kernel.h>
40 #include <sys/proc.h>
41 #include <sys/signalvar.h>
42 #include <sys/malloc.h>
43 #include <sys/errno.h>
44 #include <sys/kauth.h>
45 
46 #include <dev/wscons/wsconsio.h>
47 #include <dev/wscons/wsdisplayvar.h>
48 #include <dev/wscons/wscons_callbacks.h>
49 #include <dev/wscons/wsdisplay_usl_io.h>
50 
51 #include "opt_wsdisplay_compat.h"
52 
53 struct usl_syncdata {
54 	struct wsscreen *s_scr;
55 	struct proc *s_proc;
56 	pid_t s_pid;
57 	int s_flags;
58 #define SF_DETACHPENDING 1
59 #define SF_ATTACHPENDING 2
60 	int s_acqsig, s_relsig;
61 	int s_frsig; /* unused */
62 	void (*s_callback)(void *, int, int);
63 	void *s_cbarg;
64 	callout_t s_attach_ch;
65 	callout_t s_detach_ch;
66 };
67 
68 static int usl_sync_init(struct wsscreen *, struct usl_syncdata **,
69 			      struct proc *, int, int, int);
70 static void usl_sync_done(struct usl_syncdata *);
71 static int usl_sync_check(void *);
72 static int usl_sync_check_sig(struct usl_syncdata *, int, int);
73 static struct usl_syncdata *usl_sync_get(struct wsscreen *);
74 
75 static int usl_detachproc(void *, int, void (*)(void *, int, int), void *);
76 static int usl_detachack(struct usl_syncdata *, int);
77 static void usl_detachtimeout(void *);
78 static int usl_attachproc(void *, int, void (*)(void *, int, int), void *);
79 static int usl_attachack(struct usl_syncdata *, int);
80 static void usl_attachtimeout(void *);
81 
82 static const struct wscons_syncops usl_syncops = {
83 	usl_detachproc,
84 	usl_attachproc,
85 	usl_sync_check,
86 #define _usl_sync_destroy ((void (*)(void *))usl_sync_done)
87 	_usl_sync_destroy
88 };
89 
90 #ifndef WSCOMPAT_USL_SYNCTIMEOUT
91 #define WSCOMPAT_USL_SYNCTIMEOUT 5 /* seconds */
92 #endif
93 static int wscompat_usl_synctimeout = WSCOMPAT_USL_SYNCTIMEOUT;
94 
95 static int
96 usl_sync_init(struct wsscreen *scr, struct usl_syncdata **sdp,
97 	struct proc *p, int acqsig, int relsig, int frsig)
98 {
99 	struct usl_syncdata *sd;
100 	int res;
101 
102 	sd = malloc(sizeof(struct usl_syncdata), M_DEVBUF, M_WAITOK);
103 	if (!sd)
104 		return (ENOMEM);
105 	sd->s_scr = scr;
106 	sd->s_proc = p;
107 	sd->s_pid = p->p_pid;
108 	sd->s_flags = 0;
109 	sd->s_acqsig = acqsig;
110 	sd->s_relsig = relsig;
111 	sd->s_frsig = frsig;
112 	callout_init(&sd->s_attach_ch, 0);
113 	callout_setfunc(&sd->s_attach_ch, usl_attachtimeout, sd);
114 	callout_init(&sd->s_detach_ch, 0);
115 	callout_setfunc(&sd->s_detach_ch, usl_detachtimeout, sd);
116 	res = wsscreen_attach_sync(scr, &usl_syncops, sd);
117 	if (res) {
118 		free(sd, M_DEVBUF);
119 		return (res);
120 	}
121 	*sdp = sd;
122 	return (0);
123 }
124 
125 static void
126 usl_sync_done(struct usl_syncdata *sd)
127 {
128 	if (sd->s_flags & SF_DETACHPENDING) {
129 		callout_stop(&sd->s_detach_ch);
130 		(*sd->s_callback)(sd->s_cbarg, 0, 0);
131 	}
132 	if (sd->s_flags & SF_ATTACHPENDING) {
133 		callout_stop(&sd->s_attach_ch);
134 		(*sd->s_callback)(sd->s_cbarg, ENXIO, 0);
135 	}
136 	wsscreen_detach_sync(sd->s_scr);
137 	free(sd, M_DEVBUF);
138 }
139 
140 static int
141 usl_sync_check_sig(struct usl_syncdata *sd, int sig, int flags)
142 {
143 
144 	mutex_enter(proc_lock);
145 	if (sd->s_proc == p_find(sd->s_pid, PFIND_LOCKED)) {
146 		sd->s_flags |= flags;
147 		if (sig)
148 			psignal(sd->s_proc, sig);
149 		mutex_exit(proc_lock);
150 		return (1);
151 	}
152 	mutex_exit(proc_lock);
153 
154 	printf("usl_sync_check: process %d died\n", sd->s_pid);
155 	usl_sync_done(sd);
156 	return (0);
157 }
158 
159 static int
160 usl_sync_check(void *vsd)
161 {
162 
163 	struct usl_syncdata *sd = vsd;
164 	return usl_sync_check_sig(sd, 0, 0);
165 }
166 
167 static struct usl_syncdata *
168 usl_sync_get(struct wsscreen *scr)
169 {
170 	void *sd;
171 
172 	if (wsscreen_lookup_sync(scr, &usl_syncops, &sd))
173 		return (0);
174 	return (struct usl_syncdata *)sd;
175 }
176 
177 static int
178 usl_detachproc(void *cookie, int waitok,
179     void (*callback)(void *, int, int), void *cbarg)
180 {
181 	struct usl_syncdata *sd = cookie;
182 
183 	/* we really need a callback */
184 	if (!callback)
185 		return (EINVAL);
186 
187 	/*
188 	 * Normally, this is called from the controlling process.
189 	 * Is is supposed to reply with a VT_RELDISP ioctl(), so
190 	 * it is not useful to tsleep() here.
191 	 */
192 	sd->s_callback = callback;
193 	sd->s_cbarg = cbarg;
194 	if (!usl_sync_check_sig(sd, sd->s_relsig, SF_DETACHPENDING))
195 		return (0);
196 
197 	callout_schedule(&sd->s_detach_ch, wscompat_usl_synctimeout * hz);
198 	return (EAGAIN);
199 }
200 
201 static int
202 usl_detachack(struct usl_syncdata *sd, int ack)
203 {
204 	if (!(sd->s_flags & SF_DETACHPENDING)) {
205 		printf("usl_detachack: not detaching\n");
206 		return (EINVAL);
207 	}
208 
209 	callout_stop(&sd->s_detach_ch);
210 	sd->s_flags &= ~SF_DETACHPENDING;
211 
212 	if (sd->s_callback)
213 		(*sd->s_callback)(sd->s_cbarg, (ack ? 0 : EIO), 1);
214 
215 	return (0);
216 }
217 
218 static void
219 usl_detachtimeout(void *arg)
220 {
221 	struct usl_syncdata *sd = arg;
222 
223 	printf("usl_detachtimeout\n");
224 
225 	if (!(sd->s_flags & SF_DETACHPENDING)) {
226 		printf("usl_detachtimeout: not detaching\n");
227 		return;
228 	}
229 
230 	sd->s_flags &= ~SF_DETACHPENDING;
231 
232 	if (sd->s_callback)
233 		(*sd->s_callback)(sd->s_cbarg, EIO, 0);
234 
235 	(void) usl_sync_check(sd);
236 }
237 
238 static int
239 usl_attachproc(void *cookie, int waitok,
240     void (*callback)(void *, int, int), void *cbarg)
241 {
242 	struct usl_syncdata *sd = cookie;
243 
244 	/* we really need a callback */
245 	if (!callback)
246 		return (EINVAL);
247 
248 	sd->s_callback = callback;
249 	sd->s_cbarg = cbarg;
250 	if (!usl_sync_check_sig(sd, sd->s_acqsig, SF_ATTACHPENDING))
251 		return (0);
252 
253 	callout_schedule(&sd->s_attach_ch, wscompat_usl_synctimeout * hz);
254 	return (EAGAIN);
255 }
256 
257 static int
258 usl_attachack(struct usl_syncdata *sd, int ack)
259 {
260 	if (!(sd->s_flags & SF_ATTACHPENDING)) {
261 		printf("usl_attachack: not attaching\n");
262 		return (EINVAL);
263 	}
264 
265 	callout_stop(&sd->s_attach_ch);
266 	sd->s_flags &= ~SF_ATTACHPENDING;
267 
268 	if (sd->s_callback)
269 		(*sd->s_callback)(sd->s_cbarg, (ack ? 0 : EIO), 1);
270 
271 	return (0);
272 }
273 
274 static void
275 usl_attachtimeout(void *arg)
276 {
277 	struct usl_syncdata *sd = arg;
278 
279 	printf("usl_attachtimeout\n");
280 
281 	if (!(sd->s_flags & SF_ATTACHPENDING)) {
282 		printf("usl_attachtimeout: not attaching\n");
283 		return;
284 	}
285 
286 	sd->s_flags &= ~SF_ATTACHPENDING;
287 
288 	if (sd->s_callback)
289 		(*sd->s_callback)(sd->s_cbarg, EIO, 0);
290 
291 	(void) usl_sync_check(sd);
292 }
293 
294 int
295 wsdisplay_usl_ioctl1(device_t dv, u_long cmd, void *data,
296     int flag, struct lwp *l)
297 {
298 	struct wsdisplay_softc *sc = device_private(dv);
299 	int idx, maxidx;
300 
301 	switch (cmd) {
302 	    case VT_OPENQRY:
303 		maxidx = wsdisplay_maxscreenidx(sc);
304 		for (idx = 0; idx <= maxidx; idx++) {
305 			if (wsdisplay_screenstate(sc, idx) == 0) {
306 				*(int *)data = idx + 1;
307 				return (0);
308 			}
309 		}
310 		return (ENXIO);
311 	    case VT_GETACTIVE:
312 		idx = wsdisplay_getactivescreen(sc);
313 		*(int *)data = idx + 1;
314 		return (0);
315 	    case VT_ACTIVATE:
316 	    	/*
317 	    	 * a gross and disgusting hack to make this abused up ioctl,
318 		 * which is a gross and disgusting hack on its own, work on
319 		 * LP64/BE - we want the lower 32bit so we simply dereference
320 		 * the argument pointer as long. May cause problems with 32bit
321 		 * kernels on sparc64?
322 		 */
323 
324 		idx = *(long *)data - 1;
325 		if (idx < 0)
326 			return (EINVAL);
327 		return (wsdisplay_switch(dv, idx, 1));
328 	    case VT_WAITACTIVE:
329 		idx = *(long *)data - 1;
330 		if (idx < 0)
331 			return (EINVAL);
332 		return (wsscreen_switchwait(sc, idx));
333 	    case VT_GETSTATE:
334 #define ss ((struct vt_stat *)data)
335 		idx = wsdisplay_getactivescreen(sc);
336 		ss->v_active = idx + 1;
337 		ss->v_state = 0;
338 		maxidx = wsdisplay_maxscreenidx(sc);
339 		for (idx = 0; idx <= maxidx; idx++)
340 			if (wsdisplay_screenstate(sc, idx) == EBUSY)
341 				ss->v_state |= (1 << (idx + 1));
342 #undef ss
343 		return (0);
344 
345 #ifdef WSDISPLAY_COMPAT_PCVT
346 	    case VGAPCVTID:
347 #define id ((struct pcvtid *)data)
348 		strlcpy(id->name, "pcvt", sizeof(id->name));
349 		id->rmajor = 3;
350 		id->rminor = 32;
351 #undef id
352 		return (0);
353 #endif
354 #ifdef WSDISPLAY_COMPAT_SYSCONS
355 	    case CONS_GETVERS:
356 		*(int *)data = 0x200;    /* version 2.0 */
357 		return (0);
358 #endif
359 
360 	    default:
361 		return (EPASSTHROUGH);
362 	}
363 }
364 
365 int
366 wsdisplay_usl_ioctl2(struct wsdisplay_softc *sc, struct wsscreen *scr,
367 		     u_long cmd, void *data, int flag, struct lwp *l)
368 {
369 	struct proc *p = l->l_proc;
370 	int intarg = 0, res;
371 	u_long req;
372 	void *arg;
373 	struct usl_syncdata *sd;
374 	struct wskbd_bell_data bd;
375 
376 	switch (cmd) {
377 	    case VT_SETMODE:
378 #define newmode ((struct vt_mode *)data)
379 		if (newmode->mode == VT_PROCESS) {
380 			res = usl_sync_init(scr, &sd, p, newmode->acqsig,
381 					    newmode->relsig, newmode->frsig);
382 			if (res)
383 				return (res);
384 		} else {
385 			sd = usl_sync_get(scr);
386 			if (sd)
387 				usl_sync_done(sd);
388 		}
389 #undef newmode
390 		return (0);
391 	    case VT_GETMODE:
392 #define cmode ((struct vt_mode *)data)
393 		sd = usl_sync_get(scr);
394 		if (sd) {
395 			cmode->mode = VT_PROCESS;
396 			cmode->relsig = sd->s_relsig;
397 			cmode->acqsig = sd->s_acqsig;
398 			cmode->frsig = sd->s_frsig;
399 		} else
400 			cmode->mode = VT_AUTO;
401 #undef cmode
402 		return (0);
403 	    case VT_RELDISP:
404 #define d (*(long *)data)
405 		sd = usl_sync_get(scr);
406 		if (!sd)
407 			return (EINVAL);
408 		switch (d) {
409 		    case VT_FALSE:
410 		    case VT_TRUE:
411 			return (usl_detachack(sd, (d == VT_TRUE)));
412 		    case VT_ACKACQ:
413 			return (usl_attachack(sd, 1));
414 		    default:
415 			return (EINVAL);
416 		}
417 #undef d
418 
419 	    case KDENABIO:
420 #if defined(__i386__) && (defined(COMPAT_11) || defined(COMPAT_FREEBSD))
421 		if (kauth_authorize_machdep(l->l_cred, KAUTH_MACHDEP_IOPL,
422 		    NULL, NULL, NULL, NULL) != 0)
423 			return (EPERM);
424 #endif
425 		/* FALLTHRU */
426 	    case KDDISABIO:
427 #if defined(__i386__) && (defined(COMPAT_11) || defined(COMPAT_FREEBSD))
428 		{
429 			/* XXX NJWLWP */
430 		struct trapframe *fp = (struct trapframe *)curlwp->l_md.md_regs;
431 		if (cmd == KDENABIO)
432 			fp->tf_eflags |= PSL_IOPL;
433 		else
434 			fp->tf_eflags &= ~PSL_IOPL;
435 		}
436 #endif
437 		return (0);
438 	    case KDSETRAD:
439 		/* XXX ignore for now */
440 		return (0);
441 
442 	    default:
443 		return (EPASSTHROUGH);
444 
445 	    /*
446 	     * the following are converted to wsdisplay ioctls
447 	     */
448 	    case KDSETMODE:
449 		req = WSDISPLAYIO_SMODE;
450 #define d (*(int *)data)
451 		switch (d) {
452 		    case KD_GRAPHICS:
453 			intarg = WSDISPLAYIO_MODE_MAPPED;
454 			break;
455 		    case KD_TEXT:
456 			intarg = WSDISPLAYIO_MODE_EMUL;
457 			break;
458 		    default:
459 			return (EINVAL);
460 		}
461 #undef d
462 		arg = &intarg;
463 		break;
464 	    case KDMKTONE:
465 		req = WSKBDIO_COMPLEXBELL;
466 #define d (*(int *)data)
467 		if (d) {
468 #define PCVT_SYSBEEPF	1193182
469 			if (d >> 16) {
470 				bd.which = WSKBD_BELL_DOPERIOD;
471 				bd.period = d >> 16; /* ms */
472 			}
473 			else
474 				bd.which = 0;
475 			if (d & 0xffff) {
476 				bd.which |= WSKBD_BELL_DOPITCH;
477 				bd.pitch = PCVT_SYSBEEPF/(d & 0xffff); /* Hz */
478 			}
479 		} else
480 			bd.which = 0; /* default */
481 #undef d
482 		arg = &bd;
483 		break;
484 	    case KDSETLED:
485 		req = WSKBDIO_SETLEDS;
486 		intarg = 0;
487 #define d (*(int *)data)
488 		if (d & LED_CAP)
489 			intarg |= WSKBD_LED_CAPS;
490 		if (d & LED_NUM)
491 			intarg |= WSKBD_LED_NUM;
492 		if (d & LED_SCR)
493 			intarg |= WSKBD_LED_SCROLL;
494 #undef d
495 		arg = &intarg;
496 		break;
497 	    case KDGETLED:
498 		req = WSKBDIO_GETLEDS;
499 		arg = &intarg;
500 		break;
501 #ifdef WSDISPLAY_COMPAT_RAWKBD
502 	    case KDSKBMODE:
503 		req = WSKBDIO_SETMODE;
504 		switch (*(int *)data) {
505 		    case K_RAW:
506 			intarg = WSKBD_RAW;
507 			break;
508 		    case K_XLATE:
509 			intarg = WSKBD_TRANSLATED;
510 			break;
511 		    default:
512 			return (EINVAL);
513 		}
514 		arg = &intarg;
515 		break;
516 	    case KDGKBMODE:
517 		req = WSKBDIO_GETMODE;
518 		arg = &intarg;
519 		break;
520 #endif
521 	}
522 
523 	res = wsdisplay_internal_ioctl(sc, scr, req, arg, flag, l);
524 	if (res != EPASSTHROUGH)
525 		return (res);
526 
527 	switch (cmd) {
528 	    case KDGETLED:
529 #define d (*(int *)data)
530 		d = 0;
531 		if (intarg & WSKBD_LED_CAPS)
532 			d |= LED_CAP;
533 		if (intarg & WSKBD_LED_NUM)
534 			d |= LED_NUM;
535 		if (intarg & WSKBD_LED_SCROLL)
536 			d |= LED_SCR;
537 #undef d
538 		break;
539 #ifdef WSDISPLAY_COMPAT_RAWKBD
540 	    case KDGKBMODE:
541 		*(int *)data = (intarg == WSKBD_RAW ? K_RAW : K_XLATE);
542 		break;
543 #endif
544 	}
545 
546 	return (0);
547 }
548