1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2016 iXsystems Inc.
5 * All rights reserved.
6 *
7 * This software was developed by Jakub Klama <jceel@FreeBSD.org>
8 * under sponsorship from iXsystems Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer
15 * in this position and unchanged.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright 2018 Joyent, Inc.
35 */
36
37 #include <sys/cdefs.h>
38
39 #include <sys/param.h>
40 #ifndef WITHOUT_CAPSICUM
41 #include <sys/capsicum.h>
42 #endif
43 #include <sys/linker_set.h>
44 #include <sys/uio.h>
45 #include <sys/types.h>
46 #include <sys/socket.h>
47 #include <sys/un.h>
48
49 #ifndef WITHOUT_CAPSICUM
50 #include <capsicum_helpers.h>
51 #endif
52 #include <err.h>
53 #include <errno.h>
54 #include <fcntl.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <stdbool.h>
58 #include <string.h>
59 #include <unistd.h>
60 #include <assert.h>
61 #include <pthread.h>
62 #include <libgen.h>
63 #include <sysexits.h>
64
65 #include "bhyverun.h"
66 #include "config.h"
67 #include "debug.h"
68 #include "pci_emul.h"
69 #include "virtio.h"
70 #include "mevent.h"
71 #include "sockstream.h"
72
73 #define VTCON_RINGSZ 64
74 #define VTCON_MAXPORTS 16
75 #define VTCON_MAXQ (VTCON_MAXPORTS * 2 + 2)
76
77 #define VTCON_DEVICE_READY 0
78 #define VTCON_DEVICE_ADD 1
79 #define VTCON_DEVICE_REMOVE 2
80 #define VTCON_PORT_READY 3
81 #define VTCON_CONSOLE_PORT 4
82 #define VTCON_CONSOLE_RESIZE 5
83 #define VTCON_PORT_OPEN 6
84 #define VTCON_PORT_NAME 7
85
86 #define VTCON_F_SIZE 0
87 #define VTCON_F_MULTIPORT 1
88 #define VTCON_F_EMERG_WRITE 2
89 #define VTCON_S_HOSTCAPS \
90 (VTCON_F_SIZE | VTCON_F_MULTIPORT | VTCON_F_EMERG_WRITE)
91
92 static int pci_vtcon_debug;
93 #define DPRINTF(params) if (pci_vtcon_debug) PRINTLN params
94 #define WPRINTF(params) PRINTLN params
95
96 struct pci_vtcon_softc;
97 struct pci_vtcon_port;
98 struct pci_vtcon_config;
99 typedef void (pci_vtcon_cb_t)(struct pci_vtcon_port *, void *, struct iovec *,
100 int);
101
102 struct pci_vtcon_port {
103 struct pci_vtcon_softc * vsp_sc;
104 int vsp_id;
105 const char * vsp_name;
106 bool vsp_enabled;
107 bool vsp_console;
108 bool vsp_rx_ready;
109 bool vsp_open;
110 int vsp_rxq;
111 int vsp_txq;
112 void * vsp_arg;
113 pci_vtcon_cb_t * vsp_cb;
114 };
115
116 struct pci_vtcon_sock
117 {
118 struct pci_vtcon_port * vss_port;
119 const char * vss_path;
120 struct mevent * vss_server_evp;
121 struct mevent * vss_conn_evp;
122 int vss_server_fd;
123 int vss_conn_fd;
124 bool vss_open;
125 };
126
127 struct pci_vtcon_softc {
128 struct virtio_softc vsc_vs;
129 struct vqueue_info vsc_queues[VTCON_MAXQ];
130 pthread_mutex_t vsc_mtx;
131 uint64_t vsc_cfg;
132 uint64_t vsc_features;
133 char * vsc_rootdir;
134 int vsc_kq;
135 bool vsc_ready;
136 struct pci_vtcon_port vsc_control_port;
137 struct pci_vtcon_port vsc_ports[VTCON_MAXPORTS];
138 struct pci_vtcon_config *vsc_config;
139 };
140
141 struct pci_vtcon_config {
142 uint16_t cols;
143 uint16_t rows;
144 uint32_t max_nr_ports;
145 uint32_t emerg_wr;
146 } __attribute__((packed));
147
148 struct pci_vtcon_control {
149 uint32_t id;
150 uint16_t event;
151 uint16_t value;
152 } __attribute__((packed));
153
154 struct pci_vtcon_console_resize {
155 uint16_t cols;
156 uint16_t rows;
157 } __attribute__((packed));
158
159 static void pci_vtcon_reset(void *);
160 static void pci_vtcon_notify_rx(void *, struct vqueue_info *);
161 static void pci_vtcon_notify_tx(void *, struct vqueue_info *);
162 static int pci_vtcon_cfgread(void *, int, int, uint32_t *);
163 static int pci_vtcon_cfgwrite(void *, int, int, uint32_t);
164 static void pci_vtcon_neg_features(void *, uint64_t);
165 static void pci_vtcon_sock_accept(int, enum ev_type, void *);
166 static void pci_vtcon_sock_rx(int, enum ev_type, void *);
167 static void pci_vtcon_sock_tx(struct pci_vtcon_port *, void *, struct iovec *,
168 int);
169 static void pci_vtcon_control_send(struct pci_vtcon_softc *,
170 struct pci_vtcon_control *, const void *, size_t);
171 static void pci_vtcon_announce_port(struct pci_vtcon_port *);
172 static void pci_vtcon_open_port(struct pci_vtcon_port *, bool);
173
174 static struct virtio_consts vtcon_vi_consts = {
175 .vc_name = "vtcon",
176 .vc_nvq = VTCON_MAXQ,
177 .vc_cfgsize = sizeof(struct pci_vtcon_config),
178 .vc_reset = pci_vtcon_reset,
179 .vc_cfgread = pci_vtcon_cfgread,
180 .vc_cfgwrite = pci_vtcon_cfgwrite,
181 .vc_apply_features = pci_vtcon_neg_features,
182 .vc_hv_caps = VTCON_S_HOSTCAPS,
183 };
184
185 static void
pci_vtcon_reset(void * vsc)186 pci_vtcon_reset(void *vsc)
187 {
188 struct pci_vtcon_softc *sc;
189
190 sc = vsc;
191
192 DPRINTF(("vtcon: device reset requested!"));
193 vi_reset_dev(&sc->vsc_vs);
194 }
195
196 static void
pci_vtcon_neg_features(void * vsc,uint64_t negotiated_features)197 pci_vtcon_neg_features(void *vsc, uint64_t negotiated_features)
198 {
199 struct pci_vtcon_softc *sc = vsc;
200
201 sc->vsc_features = negotiated_features;
202 }
203
204 static int
pci_vtcon_cfgread(void * vsc,int offset,int size,uint32_t * retval)205 pci_vtcon_cfgread(void *vsc, int offset, int size, uint32_t *retval)
206 {
207 struct pci_vtcon_softc *sc = vsc;
208 void *ptr;
209
210 ptr = (uint8_t *)sc->vsc_config + offset;
211 memcpy(retval, ptr, size);
212 return (0);
213 }
214
215 static int
pci_vtcon_cfgwrite(void * vsc __unused,int offset __unused,int size __unused,uint32_t val __unused)216 pci_vtcon_cfgwrite(void *vsc __unused, int offset __unused, int size __unused,
217 uint32_t val __unused)
218 {
219 return (0);
220 }
221
222 static inline struct pci_vtcon_port *
pci_vtcon_vq_to_port(struct pci_vtcon_softc * sc,struct vqueue_info * vq)223 pci_vtcon_vq_to_port(struct pci_vtcon_softc *sc, struct vqueue_info *vq)
224 {
225 uint16_t num = vq->vq_num;
226
227 if (num == 0 || num == 1)
228 return (&sc->vsc_ports[0]);
229
230 if (num == 2 || num == 3)
231 return (&sc->vsc_control_port);
232
233 return (&sc->vsc_ports[(num / 2) - 1]);
234 }
235
236 static inline struct vqueue_info *
pci_vtcon_port_to_vq(struct pci_vtcon_port * port,bool tx_queue)237 pci_vtcon_port_to_vq(struct pci_vtcon_port *port, bool tx_queue)
238 {
239 int qnum;
240
241 qnum = tx_queue ? port->vsp_txq : port->vsp_rxq;
242 return (&port->vsp_sc->vsc_queues[qnum]);
243 }
244
245 static struct pci_vtcon_port *
pci_vtcon_port_add(struct pci_vtcon_softc * sc,int port_id,const char * name,pci_vtcon_cb_t * cb,void * arg)246 pci_vtcon_port_add(struct pci_vtcon_softc *sc, int port_id, const char *name,
247 pci_vtcon_cb_t *cb, void *arg)
248 {
249 struct pci_vtcon_port *port;
250
251 port = &sc->vsc_ports[port_id];
252 if (port->vsp_enabled) {
253 errno = EBUSY;
254 return (NULL);
255 }
256 port->vsp_id = port_id;
257 port->vsp_sc = sc;
258 port->vsp_name = name;
259 port->vsp_cb = cb;
260 port->vsp_arg = arg;
261
262 if (port->vsp_id == 0) {
263 /* port0 */
264 port->vsp_txq = 0;
265 port->vsp_rxq = 1;
266 } else {
267 port->vsp_txq = (port_id + 1) * 2;
268 port->vsp_rxq = port->vsp_txq + 1;
269 }
270
271 port->vsp_enabled = true;
272 return (port);
273 }
274
275 static int
pci_vtcon_sock_add(struct pci_vtcon_softc * sc,const char * port_name,const nvlist_t * nvl)276 pci_vtcon_sock_add(struct pci_vtcon_softc *sc, const char *port_name,
277 const nvlist_t *nvl)
278 {
279 struct pci_vtcon_sock *sock = NULL;
280 #ifdef __FreeBSD__
281 struct sockaddr_un sun;
282 #else
283 /* Our compiler #defines 'sun' as '1'. Awesome. */
284 struct sockaddr_un addr;
285 #endif
286 const char *name, *path;
287 char *cp, *pathcopy;
288 long port;
289 int s = -1, fd = -1, error = 0;
290 #ifndef WITHOUT_CAPSICUM
291 cap_rights_t rights;
292 #endif
293
294 port = strtol(port_name, &cp, 0);
295 if (*cp != '\0' || port < 0 || port >= VTCON_MAXPORTS) {
296 EPRINTLN("vtcon: Invalid port %s", port_name);
297 error = -1;
298 goto out;
299 }
300
301 path = get_config_value_node(nvl, "path");
302 if (path == NULL) {
303 EPRINTLN("vtcon: required path missing for port %ld", port);
304 error = -1;
305 goto out;
306 }
307
308 sock = calloc(1, sizeof(struct pci_vtcon_sock));
309 if (sock == NULL) {
310 error = -1;
311 goto out;
312 }
313
314 s = socket(AF_UNIX, SOCK_STREAM, 0);
315 if (s < 0) {
316 error = -1;
317 goto out;
318 }
319
320 #ifdef __FreeBSD__
321 pathcopy = strdup(path);
322 if (pathcopy == NULL) {
323 error = -1;
324 goto out;
325 }
326
327 fd = open(dirname(pathcopy), O_RDONLY | O_DIRECTORY);
328 if (fd < 0) {
329 free(pathcopy);
330 error = -1;
331 goto out;
332 }
333
334 sun.sun_family = AF_UNIX;
335 sun.sun_len = sizeof(struct sockaddr_un);
336 strcpy(pathcopy, path);
337 strlcpy(sun.sun_path, basename(pathcopy), sizeof(sun.sun_path));
338 free(pathcopy);
339
340 if (bindat(fd, s, (struct sockaddr *)&sun, sun.sun_len) < 0) {
341 error = -1;
342 goto out;
343 }
344 #else /* __FreeBSD__ */
345 /* Do a simple bind rather than the FreeBSD bindat() */
346 pathcopy = (char *)path;
347 addr.sun_family = AF_UNIX;
348 (void) strlcpy(addr.sun_path, pathcopy, sizeof (addr.sun_path));
349 if (bind(fd, (struct sockaddr *)&addr, sizeof (addr)) < 0) {
350 error = -1;
351 goto out;
352 }
353 #endif /* __FreeBSD__ */
354
355 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
356 error = -1;
357 goto out;
358 }
359
360 if (listen(s, 1) < 0) {
361 error = -1;
362 goto out;
363 }
364
365 #ifndef WITHOUT_CAPSICUM
366 cap_rights_init(&rights, CAP_ACCEPT, CAP_EVENT, CAP_READ, CAP_WRITE);
367 if (caph_rights_limit(s, &rights) == -1)
368 errx(EX_OSERR, "Unable to apply rights for sandbox");
369 #endif
370
371 name = get_config_value_node(nvl, "name");
372 if (name == NULL) {
373 EPRINTLN("vtcon: required name missing for port %ld", port);
374 error = -1;
375 goto out;
376 }
377 sock->vss_port = pci_vtcon_port_add(sc, port, name, pci_vtcon_sock_tx, sock);
378 if (sock->vss_port == NULL) {
379 error = -1;
380 goto out;
381 }
382
383 sock->vss_open = false;
384 sock->vss_conn_fd = -1;
385 sock->vss_server_fd = s;
386 sock->vss_server_evp = mevent_add(s, EVF_READ, pci_vtcon_sock_accept,
387 sock);
388
389 if (sock->vss_server_evp == NULL) {
390 error = -1;
391 goto out;
392 }
393
394 out:
395 if (fd != -1)
396 close(fd);
397
398 if (error != 0) {
399 if (s != -1)
400 close(s);
401 free(sock);
402 }
403
404 return (error);
405 }
406
407 static void
pci_vtcon_sock_accept(int fd __unused,enum ev_type t __unused,void * arg)408 pci_vtcon_sock_accept(int fd __unused, enum ev_type t __unused, void *arg)
409 {
410 struct pci_vtcon_sock *sock = (struct pci_vtcon_sock *)arg;
411 int s;
412
413 s = accept(sock->vss_server_fd, NULL, NULL);
414 if (s < 0)
415 return;
416
417 if (sock->vss_open) {
418 close(s);
419 return;
420 }
421
422 sock->vss_open = true;
423 sock->vss_conn_fd = s;
424 sock->vss_conn_evp = mevent_add(s, EVF_READ, pci_vtcon_sock_rx, sock);
425
426 pci_vtcon_open_port(sock->vss_port, true);
427 }
428
429 static void
pci_vtcon_sock_rx(int fd __unused,enum ev_type t __unused,void * arg)430 pci_vtcon_sock_rx(int fd __unused, enum ev_type t __unused, void *arg)
431 {
432 struct pci_vtcon_port *port;
433 struct pci_vtcon_sock *sock = (struct pci_vtcon_sock *)arg;
434 struct vqueue_info *vq;
435 struct vi_req req;
436 struct iovec iov;
437 static char dummybuf[2048];
438 int len, n;
439
440 port = sock->vss_port;
441 vq = pci_vtcon_port_to_vq(port, true);
442
443 if (!sock->vss_open || !port->vsp_rx_ready) {
444 len = read(sock->vss_conn_fd, dummybuf, sizeof(dummybuf));
445 if (len == 0)
446 goto close;
447
448 return;
449 }
450
451 if (!vq_has_descs(vq)) {
452 len = read(sock->vss_conn_fd, dummybuf, sizeof(dummybuf));
453 vq_endchains(vq, 1);
454 if (len == 0)
455 goto close;
456
457 return;
458 }
459
460 do {
461 n = vq_getchain(vq, &iov, 1, &req);
462 assert(n == 1);
463 len = readv(sock->vss_conn_fd, &iov, n);
464
465 if (len == 0 || (len < 0 && errno == EWOULDBLOCK)) {
466 vq_retchains(vq, 1);
467 vq_endchains(vq, 0);
468 if (len == 0)
469 goto close;
470
471 return;
472 }
473
474 vq_relchain(vq, req.idx, len);
475 } while (vq_has_descs(vq));
476
477 vq_endchains(vq, 1);
478
479 close:
480 mevent_delete_close(sock->vss_conn_evp);
481 sock->vss_conn_fd = -1;
482 sock->vss_open = false;
483 }
484
485 static void
pci_vtcon_sock_tx(struct pci_vtcon_port * port __unused,void * arg __unused,struct iovec * iov,int niov)486 pci_vtcon_sock_tx(struct pci_vtcon_port *port __unused, void *arg __unused,
487 struct iovec *iov, int niov)
488 {
489 struct pci_vtcon_sock *sock;
490 int i, ret;
491
492 #ifndef __FreeBSD__
493 ret = 0;
494 #endif
495
496 sock = (struct pci_vtcon_sock *)arg;
497
498 if (sock->vss_conn_fd == -1)
499 return;
500
501 for (i = 0; i < niov; i++) {
502 ret = stream_write(sock->vss_conn_fd, iov[i].iov_base,
503 iov[i].iov_len);
504 if (ret <= 0)
505 break;
506 }
507
508 if (ret <= 0) {
509 mevent_delete_close(sock->vss_conn_evp);
510 sock->vss_conn_fd = -1;
511 sock->vss_open = false;
512 }
513 }
514
515 static void
pci_vtcon_control_tx(struct pci_vtcon_port * port,void * arg __unused,struct iovec * iov,int niov)516 pci_vtcon_control_tx(struct pci_vtcon_port *port, void *arg __unused,
517 struct iovec *iov, int niov)
518 {
519 struct pci_vtcon_softc *sc;
520 struct pci_vtcon_port *tmp;
521 struct pci_vtcon_control resp, *ctrl;
522 int i;
523
524 assert(niov == 1);
525
526 sc = port->vsp_sc;
527 ctrl = (struct pci_vtcon_control *)iov->iov_base;
528
529 switch (ctrl->event) {
530 case VTCON_DEVICE_READY:
531 sc->vsc_ready = true;
532 /* set port ready events for registered ports */
533 for (i = 0; i < VTCON_MAXPORTS; i++) {
534 tmp = &sc->vsc_ports[i];
535 if (tmp->vsp_enabled)
536 pci_vtcon_announce_port(tmp);
537
538 if (tmp->vsp_open)
539 pci_vtcon_open_port(tmp, true);
540 }
541 break;
542
543 case VTCON_PORT_READY:
544 tmp = &sc->vsc_ports[ctrl->id];
545 if (ctrl->id >= VTCON_MAXPORTS || !tmp->vsp_enabled) {
546 WPRINTF(("VTCON_PORT_READY event for unknown port %d",
547 ctrl->id));
548 return;
549 }
550
551 if (tmp->vsp_console) {
552 resp.event = VTCON_CONSOLE_PORT;
553 resp.id = ctrl->id;
554 resp.value = 1;
555 pci_vtcon_control_send(sc, &resp, NULL, 0);
556 }
557 break;
558 }
559 }
560
561 static void
pci_vtcon_announce_port(struct pci_vtcon_port * port)562 pci_vtcon_announce_port(struct pci_vtcon_port *port)
563 {
564 struct pci_vtcon_control event;
565
566 event.id = port->vsp_id;
567 event.event = VTCON_DEVICE_ADD;
568 event.value = 1;
569 pci_vtcon_control_send(port->vsp_sc, &event, NULL, 0);
570
571 event.event = VTCON_PORT_NAME;
572 pci_vtcon_control_send(port->vsp_sc, &event, port->vsp_name,
573 strlen(port->vsp_name));
574 }
575
576 static void
pci_vtcon_open_port(struct pci_vtcon_port * port,bool open)577 pci_vtcon_open_port(struct pci_vtcon_port *port, bool open)
578 {
579 struct pci_vtcon_control event;
580
581 if (!port->vsp_sc->vsc_ready) {
582 port->vsp_open = true;
583 return;
584 }
585
586 event.id = port->vsp_id;
587 event.event = VTCON_PORT_OPEN;
588 event.value = (int)open;
589 pci_vtcon_control_send(port->vsp_sc, &event, NULL, 0);
590 }
591
592 static void
pci_vtcon_control_send(struct pci_vtcon_softc * sc,struct pci_vtcon_control * ctrl,const void * payload,size_t len)593 pci_vtcon_control_send(struct pci_vtcon_softc *sc,
594 struct pci_vtcon_control *ctrl, const void *payload, size_t len)
595 {
596 struct vqueue_info *vq;
597 struct vi_req req;
598 struct iovec iov;
599 int n;
600
601 vq = pci_vtcon_port_to_vq(&sc->vsc_control_port, true);
602
603 if (!vq_has_descs(vq))
604 return;
605
606 n = vq_getchain(vq, &iov, 1, &req);
607 assert(n == 1);
608
609 memcpy(iov.iov_base, ctrl, sizeof(struct pci_vtcon_control));
610 if (payload != NULL && len > 0)
611 memcpy((uint8_t *)iov.iov_base +
612 sizeof(struct pci_vtcon_control), payload, len);
613
614 vq_relchain(vq, req.idx, sizeof(struct pci_vtcon_control) + len);
615 vq_endchains(vq, 1);
616 }
617
618
619 static void
pci_vtcon_notify_tx(void * vsc,struct vqueue_info * vq)620 pci_vtcon_notify_tx(void *vsc, struct vqueue_info *vq)
621 {
622 struct pci_vtcon_softc *sc;
623 struct pci_vtcon_port *port;
624 struct iovec iov[1];
625 struct vi_req req;
626 int n;
627
628 sc = vsc;
629 port = pci_vtcon_vq_to_port(sc, vq);
630
631 while (vq_has_descs(vq)) {
632 n = vq_getchain(vq, iov, 1, &req);
633 assert(n == 1);
634 if (port != NULL)
635 port->vsp_cb(port, port->vsp_arg, iov, 1);
636
637 /*
638 * Release this chain and handle more
639 */
640 vq_relchain(vq, req.idx, 0);
641 }
642 vq_endchains(vq, 1); /* Generate interrupt if appropriate. */
643 }
644
645 static void
pci_vtcon_notify_rx(void * vsc,struct vqueue_info * vq)646 pci_vtcon_notify_rx(void *vsc, struct vqueue_info *vq)
647 {
648 struct pci_vtcon_softc *sc;
649 struct pci_vtcon_port *port;
650
651 sc = vsc;
652 port = pci_vtcon_vq_to_port(sc, vq);
653
654 if (!port->vsp_rx_ready) {
655 port->vsp_rx_ready = 1;
656 vq_kick_disable(vq);
657 }
658 }
659
660 /*
661 * Each console device has a "port" node which contains nodes for
662 * each port. Ports are numbered starting at 0.
663 */
664 static int
pci_vtcon_legacy_config_port(nvlist_t * nvl,int port,char * opt)665 pci_vtcon_legacy_config_port(nvlist_t *nvl, int port, char *opt)
666 {
667 char *name, *path;
668 char node_name[sizeof("XX")];
669 nvlist_t *port_nvl;
670
671 name = strsep(&opt, "=");
672 path = opt;
673 if (path == NULL) {
674 EPRINTLN("vtcon: port %s requires a path", name);
675 return (-1);
676 }
677 if (port >= VTCON_MAXPORTS) {
678 EPRINTLN("vtcon: too many ports");
679 return (-1);
680 }
681 snprintf(node_name, sizeof(node_name), "%d", port);
682 port_nvl = create_relative_config_node(nvl, node_name);
683 set_config_value_node(port_nvl, "name", name);
684 set_config_value_node(port_nvl, "path", path);
685 return (0);
686 }
687
688 static int
pci_vtcon_legacy_config(nvlist_t * nvl,const char * opts)689 pci_vtcon_legacy_config(nvlist_t *nvl, const char *opts)
690 {
691 char *opt, *str, *tofree;
692 nvlist_t *ports_nvl;
693 int error, port;
694
695 ports_nvl = create_relative_config_node(nvl, "port");
696 tofree = str = strdup(opts);
697 error = 0;
698 port = 0;
699 while ((opt = strsep(&str, ",")) != NULL) {
700 error = pci_vtcon_legacy_config_port(ports_nvl, port, opt);
701 if (error)
702 break;
703 port++;
704 }
705 free(tofree);
706 return (error);
707 }
708
709 static int
pci_vtcon_init(struct pci_devinst * pi,nvlist_t * nvl)710 pci_vtcon_init(struct pci_devinst *pi, nvlist_t *nvl)
711 {
712 struct pci_vtcon_softc *sc;
713 nvlist_t *ports_nvl;
714 int i;
715
716 sc = calloc(1, sizeof(struct pci_vtcon_softc));
717 sc->vsc_config = calloc(1, sizeof(struct pci_vtcon_config));
718 sc->vsc_config->max_nr_ports = VTCON_MAXPORTS;
719 sc->vsc_config->cols = 80;
720 sc->vsc_config->rows = 25;
721
722 pthread_mutex_init(&sc->vsc_mtx, NULL);
723
724 vi_softc_linkup(&sc->vsc_vs, &vtcon_vi_consts, sc, pi, sc->vsc_queues);
725 sc->vsc_vs.vs_mtx = &sc->vsc_mtx;
726
727 for (i = 0; i < VTCON_MAXQ; i++) {
728 sc->vsc_queues[i].vq_qsize = VTCON_RINGSZ;
729 sc->vsc_queues[i].vq_notify = i % 2 == 0
730 ? pci_vtcon_notify_rx
731 : pci_vtcon_notify_tx;
732 }
733
734 /* initialize config space */
735 pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_CONSOLE);
736 pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR);
737 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM);
738 pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_ID_CONSOLE);
739 pci_set_cfgdata16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR);
740
741 if (vi_intr_init(&sc->vsc_vs, 1, fbsdrun_virtio_msix()))
742 return (1);
743 vi_set_io_bar(&sc->vsc_vs, 0);
744
745 /* create control port */
746 sc->vsc_control_port.vsp_sc = sc;
747 sc->vsc_control_port.vsp_txq = 2;
748 sc->vsc_control_port.vsp_rxq = 3;
749 sc->vsc_control_port.vsp_cb = pci_vtcon_control_tx;
750 sc->vsc_control_port.vsp_enabled = true;
751
752 ports_nvl = find_relative_config_node(nvl, "port");
753 if (ports_nvl != NULL) {
754 const char *name;
755 void *cookie;
756 int type;
757
758 cookie = NULL;
759 while ((name = nvlist_next(ports_nvl, &type, &cookie)) !=
760 NULL) {
761 if (type != NV_TYPE_NVLIST)
762 continue;
763
764 if (pci_vtcon_sock_add(sc, name,
765 nvlist_get_nvlist(ports_nvl, name)) < 0) {
766 EPRINTLN("cannot create port %s: %s",
767 name, strerror(errno));
768 return (1);
769 }
770 }
771 }
772
773 return (0);
774 }
775
776 static const struct pci_devemu pci_de_vcon = {
777 .pe_emu = "virtio-console",
778 .pe_init = pci_vtcon_init,
779 .pe_barwrite = vi_pci_write,
780 .pe_barread = vi_pci_read,
781 .pe_legacy_config = pci_vtcon_legacy_config,
782 };
783 PCI_EMUL_SET(pci_de_vcon);
784