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Commit | Line | Data |
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98b19252 AS |
1 | /* |
2 | * A bus for connecting virtio serial and console ports | |
3 | * | |
71c092e9 | 4 | * Copyright (C) 2009, 2010 Red Hat, Inc. |
98b19252 AS |
5 | * |
6 | * Author(s): | |
7 | * Amit Shah <amit.shah@redhat.com> | |
8 | * | |
9 | * Some earlier parts are: | |
10 | * Copyright IBM, Corp. 2008 | |
11 | * authored by | |
12 | * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> | |
13 | * | |
14 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
15 | * the COPYING file in the top-level directory. | |
6b620ca3 PB |
16 | * |
17 | * Contributions after 2012-01-13 are licensed under the terms of the | |
18 | * GNU GPL, version 2 or (at your option) any later version. | |
98b19252 AS |
19 | */ |
20 | ||
e4d5639d | 21 | #include "iov.h" |
98b19252 AS |
22 | #include "monitor.h" |
23 | #include "qemu-queue.h" | |
24 | #include "sysbus.h" | |
49e3fdd7 | 25 | #include "trace.h" |
98b19252 AS |
26 | #include "virtio-serial.h" |
27 | ||
28 | /* The virtio-serial bus on top of which the ports will ride as devices */ | |
29 | struct VirtIOSerialBus { | |
30 | BusState qbus; | |
31 | ||
32 | /* This is the parent device that provides the bus for ports. */ | |
33 | VirtIOSerial *vser; | |
34 | ||
35 | /* The maximum number of ports that can ride on top of this bus */ | |
36 | uint32_t max_nr_ports; | |
37 | }; | |
38 | ||
bdb917bf AS |
39 | typedef struct VirtIOSerialPostLoad { |
40 | QEMUTimer *timer; | |
41 | uint32_t nr_active_ports; | |
42 | struct { | |
43 | VirtIOSerialPort *port; | |
44 | uint8_t host_connected; | |
45 | } *connected; | |
46 | } VirtIOSerialPostLoad; | |
47 | ||
98b19252 AS |
48 | struct VirtIOSerial { |
49 | VirtIODevice vdev; | |
50 | ||
51 | VirtQueue *c_ivq, *c_ovq; | |
52 | /* Arrays of ivqs and ovqs: one per port */ | |
53 | VirtQueue **ivqs, **ovqs; | |
54 | ||
5e52e5f9 | 55 | VirtIOSerialBus bus; |
98b19252 | 56 | |
8b53a865 AS |
57 | DeviceState *qdev; |
58 | ||
98b19252 | 59 | QTAILQ_HEAD(, VirtIOSerialPort) ports; |
055b889f AS |
60 | |
61 | /* bitmap for identifying active ports */ | |
62 | uint32_t *ports_map; | |
63 | ||
98b19252 | 64 | struct virtio_console_config config; |
80dcfb85 | 65 | |
bdb917bf | 66 | struct VirtIOSerialPostLoad *post_load; |
98b19252 AS |
67 | }; |
68 | ||
69 | static VirtIOSerialPort *find_port_by_id(VirtIOSerial *vser, uint32_t id) | |
70 | { | |
71 | VirtIOSerialPort *port; | |
72 | ||
055b889f AS |
73 | if (id == VIRTIO_CONSOLE_BAD_ID) { |
74 | return NULL; | |
75 | } | |
76 | ||
98b19252 AS |
77 | QTAILQ_FOREACH(port, &vser->ports, next) { |
78 | if (port->id == id) | |
79 | return port; | |
80 | } | |
81 | return NULL; | |
82 | } | |
83 | ||
84 | static VirtIOSerialPort *find_port_by_vq(VirtIOSerial *vser, VirtQueue *vq) | |
85 | { | |
86 | VirtIOSerialPort *port; | |
87 | ||
88 | QTAILQ_FOREACH(port, &vser->ports, next) { | |
89 | if (port->ivq == vq || port->ovq == vq) | |
90 | return port; | |
91 | } | |
92 | return NULL; | |
93 | } | |
94 | ||
6663a195 AS |
95 | static bool use_multiport(VirtIOSerial *vser) |
96 | { | |
97 | return vser->vdev.guest_features & (1 << VIRTIO_CONSOLE_F_MULTIPORT); | |
98 | } | |
99 | ||
98b19252 AS |
100 | static size_t write_to_port(VirtIOSerialPort *port, |
101 | const uint8_t *buf, size_t size) | |
102 | { | |
103 | VirtQueueElement elem; | |
104 | VirtQueue *vq; | |
e4d5639d | 105 | size_t offset; |
98b19252 AS |
106 | |
107 | vq = port->ivq; | |
108 | if (!virtio_queue_ready(vq)) { | |
109 | return 0; | |
110 | } | |
98b19252 | 111 | |
e4d5639d | 112 | offset = 0; |
98b19252 | 113 | while (offset < size) { |
e4d5639d | 114 | size_t len; |
98b19252 AS |
115 | |
116 | if (!virtqueue_pop(vq, &elem)) { | |
117 | break; | |
118 | } | |
119 | ||
dcf6f5e1 MT |
120 | len = iov_from_buf(elem.in_sg, elem.in_num, 0, |
121 | buf + offset, size - offset); | |
e4d5639d | 122 | offset += len; |
98b19252 | 123 | |
98b19252 AS |
124 | virtqueue_push(vq, &elem, len); |
125 | } | |
126 | ||
127 | virtio_notify(&port->vser->vdev, vq); | |
128 | return offset; | |
129 | } | |
130 | ||
6bff8656 | 131 | static void discard_vq_data(VirtQueue *vq, VirtIODevice *vdev) |
a69c7600 AS |
132 | { |
133 | VirtQueueElement elem; | |
134 | ||
7185f931 AS |
135 | if (!virtio_queue_ready(vq)) { |
136 | return; | |
137 | } | |
6bff8656 AS |
138 | while (virtqueue_pop(vq, &elem)) { |
139 | virtqueue_push(vq, &elem, 0); | |
140 | } | |
141 | virtio_notify(vdev, vq); | |
142 | } | |
143 | ||
9ed7b059 | 144 | static void do_flush_queued_data(VirtIOSerialPort *port, VirtQueue *vq, |
6bff8656 | 145 | VirtIODevice *vdev) |
a69c7600 | 146 | { |
f82e35e3 | 147 | VirtIOSerialPortClass *vsc; |
a15bb0d6 | 148 | |
6bff8656 | 149 | assert(port); |
fd11a78b | 150 | assert(virtio_queue_ready(vq)); |
a69c7600 | 151 | |
f82e35e3 | 152 | vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port); |
a15bb0d6 | 153 | |
f1925dff | 154 | while (!port->throttled) { |
471344db | 155 | unsigned int i; |
a69c7600 | 156 | |
f1925dff AS |
157 | /* Pop an elem only if we haven't left off a previous one mid-way */ |
158 | if (!port->elem.out_num) { | |
159 | if (!virtqueue_pop(vq, &port->elem)) { | |
160 | break; | |
161 | } | |
162 | port->iov_idx = 0; | |
163 | port->iov_offset = 0; | |
164 | } | |
a69c7600 | 165 | |
f1925dff AS |
166 | for (i = port->iov_idx; i < port->elem.out_num; i++) { |
167 | size_t buf_size; | |
168 | ssize_t ret; | |
169 | ||
170 | buf_size = port->elem.out_sg[i].iov_len - port->iov_offset; | |
f82e35e3 | 171 | ret = vsc->have_data(port, |
a15bb0d6 MA |
172 | port->elem.out_sg[i].iov_base |
173 | + port->iov_offset, | |
174 | buf_size); | |
f1925dff AS |
175 | if (ret < 0 && ret != -EAGAIN) { |
176 | /* We don't handle any other type of errors here */ | |
177 | abort(); | |
178 | } | |
179 | if (ret == -EAGAIN || (ret >= 0 && ret < buf_size)) { | |
ed8e5a85 CB |
180 | /* |
181 | * this is a temporary check until chardevs can signal to | |
182 | * frontends that they are writable again. This prevents | |
183 | * the console from going into throttled mode (forever) | |
184 | * if virtio-console is connected to a pty without a | |
185 | * listener. Otherwise the guest spins forever. | |
186 | * We can revert this if | |
187 | * 1: chardevs can notify frondends | |
188 | * 2: the guest driver does not spin in these cases | |
189 | */ | |
f82e35e3 | 190 | if (!vsc->is_console) { |
ed8e5a85 CB |
191 | virtio_serial_throttle_port(port, true); |
192 | } | |
f1925dff AS |
193 | port->iov_idx = i; |
194 | if (ret > 0) { | |
195 | port->iov_offset += ret; | |
196 | } | |
197 | break; | |
198 | } | |
199 | port->iov_offset = 0; | |
a69c7600 | 200 | } |
f1925dff AS |
201 | if (port->throttled) { |
202 | break; | |
203 | } | |
204 | virtqueue_push(vq, &port->elem, 0); | |
205 | port->elem.out_num = 0; | |
a69c7600 AS |
206 | } |
207 | virtio_notify(vdev, vq); | |
208 | } | |
209 | ||
6bff8656 | 210 | static void flush_queued_data(VirtIOSerialPort *port) |
9ed7b059 | 211 | { |
a1c59752 | 212 | assert(port); |
9ed7b059 | 213 | |
6b611d3a AS |
214 | if (!virtio_queue_ready(port->ovq)) { |
215 | return; | |
216 | } | |
6bff8656 | 217 | do_flush_queued_data(port, port->ovq, &port->vser->vdev); |
9ed7b059 AS |
218 | } |
219 | ||
98b19252 AS |
220 | static size_t send_control_msg(VirtIOSerialPort *port, void *buf, size_t len) |
221 | { | |
222 | VirtQueueElement elem; | |
223 | VirtQueue *vq; | |
224 | struct virtio_console_control *cpkt; | |
225 | ||
226 | vq = port->vser->c_ivq; | |
227 | if (!virtio_queue_ready(vq)) { | |
228 | return 0; | |
229 | } | |
230 | if (!virtqueue_pop(vq, &elem)) { | |
231 | return 0; | |
232 | } | |
233 | ||
234 | cpkt = (struct virtio_console_control *)buf; | |
235 | stl_p(&cpkt->id, port->id); | |
236 | memcpy(elem.in_sg[0].iov_base, buf, len); | |
237 | ||
238 | virtqueue_push(vq, &elem, len); | |
239 | virtio_notify(&port->vser->vdev, vq); | |
240 | return len; | |
241 | } | |
242 | ||
243 | static size_t send_control_event(VirtIOSerialPort *port, uint16_t event, | |
244 | uint16_t value) | |
245 | { | |
246 | struct virtio_console_control cpkt; | |
247 | ||
248 | stw_p(&cpkt.event, event); | |
249 | stw_p(&cpkt.value, value); | |
250 | ||
49e3fdd7 | 251 | trace_virtio_serial_send_control_event(port->id, event, value); |
98b19252 AS |
252 | return send_control_msg(port, &cpkt, sizeof(cpkt)); |
253 | } | |
254 | ||
255 | /* Functions for use inside qemu to open and read from/write to ports */ | |
256 | int virtio_serial_open(VirtIOSerialPort *port) | |
257 | { | |
6663a195 AS |
258 | /* Don't allow opening an already-open port */ |
259 | if (port->host_connected) { | |
260 | return 0; | |
261 | } | |
262 | /* Send port open notification to the guest */ | |
263 | port->host_connected = true; | |
264 | send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1); | |
265 | ||
98b19252 AS |
266 | return 0; |
267 | } | |
268 | ||
269 | int virtio_serial_close(VirtIOSerialPort *port) | |
270 | { | |
6663a195 | 271 | port->host_connected = false; |
9ed7b059 AS |
272 | /* |
273 | * If there's any data the guest sent which the app didn't | |
274 | * consume, reset the throttling flag and discard the data. | |
275 | */ | |
276 | port->throttled = false; | |
6bff8656 | 277 | discard_vq_data(port->ovq, &port->vser->vdev); |
9ed7b059 | 278 | |
6663a195 AS |
279 | send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, 0); |
280 | ||
98b19252 AS |
281 | return 0; |
282 | } | |
283 | ||
284 | /* Individual ports/apps call this function to write to the guest. */ | |
285 | ssize_t virtio_serial_write(VirtIOSerialPort *port, const uint8_t *buf, | |
286 | size_t size) | |
287 | { | |
6663a195 AS |
288 | if (!port || !port->host_connected || !port->guest_connected) { |
289 | return 0; | |
290 | } | |
98b19252 AS |
291 | return write_to_port(port, buf, size); |
292 | } | |
293 | ||
294 | /* | |
295 | * Readiness of the guest to accept data on a port. | |
296 | * Returns max. data the guest can receive | |
297 | */ | |
298 | size_t virtio_serial_guest_ready(VirtIOSerialPort *port) | |
299 | { | |
300 | VirtQueue *vq = port->ivq; | |
ad3005ad | 301 | unsigned int bytes; |
98b19252 AS |
302 | |
303 | if (!virtio_queue_ready(vq) || | |
304 | !(port->vser->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK) || | |
305 | virtio_queue_empty(vq)) { | |
306 | return 0; | |
307 | } | |
6663a195 AS |
308 | if (use_multiport(port->vser) && !port->guest_connected) { |
309 | return 0; | |
310 | } | |
e1f7b481 | 311 | virtqueue_get_avail_bytes(vq, &bytes, NULL, 4096, 0); |
ad3005ad | 312 | return bytes; |
98b19252 AS |
313 | } |
314 | ||
199646d8 AL |
315 | static void flush_queued_data_bh(void *opaque) |
316 | { | |
317 | VirtIOSerialPort *port = opaque; | |
318 | ||
319 | flush_queued_data(port); | |
320 | } | |
321 | ||
9ed7b059 AS |
322 | void virtio_serial_throttle_port(VirtIOSerialPort *port, bool throttle) |
323 | { | |
324 | if (!port) { | |
325 | return; | |
326 | } | |
327 | ||
49e3fdd7 | 328 | trace_virtio_serial_throttle_port(port->id, throttle); |
9ed7b059 AS |
329 | port->throttled = throttle; |
330 | if (throttle) { | |
331 | return; | |
332 | } | |
199646d8 | 333 | qemu_bh_schedule(port->bh); |
9ed7b059 AS |
334 | } |
335 | ||
98b19252 | 336 | /* Guest wants to notify us of some event */ |
e61da14d | 337 | static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len) |
98b19252 AS |
338 | { |
339 | struct VirtIOSerialPort *port; | |
f82e35e3 | 340 | VirtIOSerialPortClass *vsc; |
98b19252 | 341 | struct virtio_console_control cpkt, *gcpkt; |
160600fd AS |
342 | uint8_t *buffer; |
343 | size_t buffer_len; | |
98b19252 AS |
344 | |
345 | gcpkt = buf; | |
98b19252 | 346 | |
e61da14d AS |
347 | if (len < sizeof(cpkt)) { |
348 | /* The guest sent an invalid control packet */ | |
349 | return; | |
350 | } | |
351 | ||
98b19252 AS |
352 | cpkt.event = lduw_p(&gcpkt->event); |
353 | cpkt.value = lduw_p(&gcpkt->value); | |
354 | ||
49e3fdd7 AS |
355 | trace_virtio_serial_handle_control_message(cpkt.event, cpkt.value); |
356 | ||
d2e4d08b | 357 | if (cpkt.event == VIRTIO_CONSOLE_DEVICE_READY) { |
4048c7c3 | 358 | if (!cpkt.value) { |
6daf194d | 359 | error_report("virtio-serial-bus: Guest failure in adding device %s", |
5e52e5f9 | 360 | vser->bus.qbus.name); |
d2e4d08b | 361 | return; |
4048c7c3 | 362 | } |
055b889f AS |
363 | /* |
364 | * The device is up, we can now tell the device about all the | |
365 | * ports we have here. | |
366 | */ | |
367 | QTAILQ_FOREACH(port, &vser->ports, next) { | |
368 | send_control_event(port, VIRTIO_CONSOLE_PORT_ADD, 1); | |
369 | } | |
d2e4d08b LC |
370 | return; |
371 | } | |
055b889f | 372 | |
d2e4d08b LC |
373 | port = find_port_by_id(vser, ldl_p(&gcpkt->id)); |
374 | if (!port) { | |
95c9cde2 | 375 | error_report("virtio-serial-bus: Unexpected port id %u for device %s", |
d2e4d08b LC |
376 | ldl_p(&gcpkt->id), vser->bus.qbus.name); |
377 | return; | |
378 | } | |
379 | ||
49e3fdd7 AS |
380 | trace_virtio_serial_handle_control_message_port(port->id); |
381 | ||
f82e35e3 | 382 | vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port); |
d2e4d08b LC |
383 | |
384 | switch(cpkt.event) { | |
98b19252 | 385 | case VIRTIO_CONSOLE_PORT_READY: |
4048c7c3 | 386 | if (!cpkt.value) { |
6daf194d | 387 | error_report("virtio-serial-bus: Guest failure in adding port %u for device %s", |
5e52e5f9 | 388 | port->id, vser->bus.qbus.name); |
4048c7c3 AS |
389 | break; |
390 | } | |
98b19252 AS |
391 | /* |
392 | * Now that we know the guest asked for the port name, we're | |
393 | * sure the guest has initialised whatever state is necessary | |
394 | * for this port. Now's a good time to let the guest know if | |
395 | * this port is a console port so that the guest can hook it | |
396 | * up to hvc. | |
397 | */ | |
f82e35e3 | 398 | if (vsc->is_console) { |
98b19252 AS |
399 | send_control_event(port, VIRTIO_CONSOLE_CONSOLE_PORT, 1); |
400 | } | |
6663a195 | 401 | |
160600fd AS |
402 | if (port->name) { |
403 | stw_p(&cpkt.event, VIRTIO_CONSOLE_PORT_NAME); | |
404 | stw_p(&cpkt.value, 1); | |
405 | ||
406 | buffer_len = sizeof(cpkt) + strlen(port->name) + 1; | |
7267c094 | 407 | buffer = g_malloc(buffer_len); |
160600fd AS |
408 | |
409 | memcpy(buffer, &cpkt, sizeof(cpkt)); | |
410 | memcpy(buffer + sizeof(cpkt), port->name, strlen(port->name)); | |
411 | buffer[buffer_len - 1] = 0; | |
412 | ||
413 | send_control_msg(port, buffer, buffer_len); | |
7267c094 | 414 | g_free(buffer); |
160600fd AS |
415 | } |
416 | ||
6663a195 AS |
417 | if (port->host_connected) { |
418 | send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1); | |
419 | } | |
420 | ||
98b19252 AS |
421 | /* |
422 | * When the guest has asked us for this information it means | |
423 | * the guest is all setup and has its virtqueues | |
424 | * initialised. If some app is interested in knowing about | |
425 | * this event, let it know. | |
426 | */ | |
f82e35e3 AL |
427 | if (vsc->guest_ready) { |
428 | vsc->guest_ready(port); | |
98b19252 AS |
429 | } |
430 | break; | |
6663a195 AS |
431 | |
432 | case VIRTIO_CONSOLE_PORT_OPEN: | |
433 | port->guest_connected = cpkt.value; | |
f82e35e3 | 434 | if (cpkt.value && vsc->guest_open) { |
6663a195 | 435 | /* Send the guest opened notification if an app is interested */ |
f82e35e3 | 436 | vsc->guest_open(port); |
6663a195 AS |
437 | } |
438 | ||
f82e35e3 | 439 | if (!cpkt.value && vsc->guest_close) { |
6663a195 | 440 | /* Send the guest closed notification if an app is interested */ |
f82e35e3 | 441 | vsc->guest_close(port); |
6663a195 AS |
442 | } |
443 | break; | |
98b19252 AS |
444 | } |
445 | } | |
446 | ||
447 | static void control_in(VirtIODevice *vdev, VirtQueue *vq) | |
448 | { | |
449 | } | |
450 | ||
451 | static void control_out(VirtIODevice *vdev, VirtQueue *vq) | |
452 | { | |
453 | VirtQueueElement elem; | |
454 | VirtIOSerial *vser; | |
e61da14d AS |
455 | uint8_t *buf; |
456 | size_t len; | |
98b19252 AS |
457 | |
458 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
459 | ||
e61da14d AS |
460 | len = 0; |
461 | buf = NULL; | |
98b19252 | 462 | while (virtqueue_pop(vq, &elem)) { |
45270ad8 | 463 | size_t cur_len; |
e61da14d AS |
464 | |
465 | cur_len = iov_size(elem.out_sg, elem.out_num); | |
466 | /* | |
467 | * Allocate a new buf only if we didn't have one previously or | |
468 | * if the size of the buf differs | |
469 | */ | |
470 | if (cur_len > len) { | |
7267c094 | 471 | g_free(buf); |
e61da14d | 472 | |
7267c094 | 473 | buf = g_malloc(cur_len); |
e61da14d AS |
474 | len = cur_len; |
475 | } | |
dcf6f5e1 | 476 | iov_to_buf(elem.out_sg, elem.out_num, 0, buf, cur_len); |
e61da14d | 477 | |
45270ad8 | 478 | handle_control_message(vser, buf, cur_len); |
1e4476aa | 479 | virtqueue_push(vq, &elem, 0); |
98b19252 | 480 | } |
7267c094 | 481 | g_free(buf); |
98b19252 AS |
482 | virtio_notify(vdev, vq); |
483 | } | |
484 | ||
485 | /* Guest wrote something to some port. */ | |
486 | static void handle_output(VirtIODevice *vdev, VirtQueue *vq) | |
487 | { | |
488 | VirtIOSerial *vser; | |
a69c7600 | 489 | VirtIOSerialPort *port; |
98b19252 AS |
490 | |
491 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
a69c7600 | 492 | port = find_port_by_vq(vser, vq); |
98b19252 | 493 | |
03ecd2c8 | 494 | if (!port || !port->host_connected) { |
6bff8656 AS |
495 | discard_vq_data(vq, vdev); |
496 | return; | |
497 | } | |
e9b382b0 AS |
498 | |
499 | if (!port->throttled) { | |
500 | do_flush_queued_data(port, vq, vdev); | |
9ed7b059 AS |
501 | return; |
502 | } | |
98b19252 AS |
503 | } |
504 | ||
505 | static void handle_input(VirtIODevice *vdev, VirtQueue *vq) | |
506 | { | |
507 | } | |
508 | ||
509 | static uint32_t get_features(VirtIODevice *vdev, uint32_t features) | |
510 | { | |
306eb457 AS |
511 | VirtIOSerial *vser; |
512 | ||
513 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
514 | ||
5e52e5f9 | 515 | if (vser->bus.max_nr_ports > 1) { |
ee4d45be MT |
516 | features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT); |
517 | } | |
98b19252 AS |
518 | return features; |
519 | } | |
520 | ||
521 | /* Guest requested config info */ | |
522 | static void get_config(VirtIODevice *vdev, uint8_t *config_data) | |
523 | { | |
524 | VirtIOSerial *vser; | |
525 | ||
526 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
527 | memcpy(config_data, &vser->config, sizeof(struct virtio_console_config)); | |
528 | } | |
529 | ||
530 | static void set_config(VirtIODevice *vdev, const uint8_t *config_data) | |
531 | { | |
532 | struct virtio_console_config config; | |
533 | ||
534 | memcpy(&config, config_data, sizeof(config)); | |
535 | } | |
536 | ||
43997225 AS |
537 | static void guest_reset(VirtIOSerial *vser) |
538 | { | |
539 | VirtIOSerialPort *port; | |
540 | VirtIOSerialPortClass *vsc; | |
541 | ||
542 | QTAILQ_FOREACH(port, &vser->ports, next) { | |
543 | vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port); | |
544 | if (port->guest_connected) { | |
545 | port->guest_connected = false; | |
546 | ||
547 | if (vsc->guest_close) | |
548 | vsc->guest_close(port); | |
549 | } | |
550 | } | |
551 | } | |
552 | ||
62a9fbf7 AL |
553 | static void set_status(VirtIODevice *vdev, uint8_t status) |
554 | { | |
555 | VirtIOSerial *vser; | |
556 | VirtIOSerialPort *port; | |
557 | ||
558 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
559 | port = find_port_by_id(vser, 0); | |
560 | ||
561 | if (port && !use_multiport(port->vser) | |
562 | && (status & VIRTIO_CONFIG_S_DRIVER_OK)) { | |
563 | /* | |
564 | * Non-multiport guests won't be able to tell us guest | |
565 | * open/close status. Such guests can only have a port at id | |
566 | * 0, so set guest_connected for such ports as soon as guest | |
567 | * is up. | |
568 | */ | |
569 | port->guest_connected = true; | |
570 | } | |
43997225 AS |
571 | if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
572 | guest_reset(vser); | |
573 | } | |
574 | } | |
575 | ||
576 | static void vser_reset(VirtIODevice *vdev) | |
577 | { | |
578 | VirtIOSerial *vser; | |
579 | ||
580 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
581 | guest_reset(vser); | |
62a9fbf7 AL |
582 | } |
583 | ||
98b19252 AS |
584 | static void virtio_serial_save(QEMUFile *f, void *opaque) |
585 | { | |
586 | VirtIOSerial *s = opaque; | |
6663a195 AS |
587 | VirtIOSerialPort *port; |
588 | uint32_t nr_active_ports; | |
5c1c9bb2 | 589 | unsigned int i, max_nr_ports; |
98b19252 AS |
590 | |
591 | /* The virtio device */ | |
592 | virtio_save(&s->vdev, f); | |
593 | ||
594 | /* The config space */ | |
595 | qemu_put_be16s(f, &s->config.cols); | |
596 | qemu_put_be16s(f, &s->config.rows); | |
6663a195 | 597 | |
055b889f AS |
598 | qemu_put_be32s(f, &s->config.max_nr_ports); |
599 | ||
600 | /* The ports map */ | |
5c1c9bb2 AK |
601 | max_nr_ports = tswap32(s->config.max_nr_ports); |
602 | for (i = 0; i < (max_nr_ports + 31) / 32; i++) { | |
055b889f AS |
603 | qemu_put_be32s(f, &s->ports_map[i]); |
604 | } | |
6663a195 | 605 | |
055b889f | 606 | /* Ports */ |
e245795b | 607 | |
6663a195 | 608 | nr_active_ports = 0; |
e245795b | 609 | QTAILQ_FOREACH(port, &s->ports, next) { |
6663a195 | 610 | nr_active_ports++; |
e245795b | 611 | } |
6663a195 AS |
612 | |
613 | qemu_put_be32s(f, &nr_active_ports); | |
614 | ||
615 | /* | |
616 | * Items in struct VirtIOSerialPort. | |
617 | */ | |
618 | QTAILQ_FOREACH(port, &s->ports, next) { | |
37f95bf3 AS |
619 | uint32_t elem_popped; |
620 | ||
6663a195 AS |
621 | qemu_put_be32s(f, &port->id); |
622 | qemu_put_byte(f, port->guest_connected); | |
31abe21f | 623 | qemu_put_byte(f, port->host_connected); |
37f95bf3 AS |
624 | |
625 | elem_popped = 0; | |
626 | if (port->elem.out_num) { | |
627 | elem_popped = 1; | |
628 | } | |
629 | qemu_put_be32s(f, &elem_popped); | |
630 | if (elem_popped) { | |
631 | qemu_put_be32s(f, &port->iov_idx); | |
632 | qemu_put_be64s(f, &port->iov_offset); | |
633 | ||
634 | qemu_put_buffer(f, (unsigned char *)&port->elem, | |
635 | sizeof(port->elem)); | |
636 | } | |
6663a195 | 637 | } |
98b19252 AS |
638 | } |
639 | ||
80dcfb85 AL |
640 | static void virtio_serial_post_load_timer_cb(void *opaque) |
641 | { | |
c3587ca1 | 642 | uint32_t i; |
80dcfb85 AL |
643 | VirtIOSerial *s = opaque; |
644 | VirtIOSerialPort *port; | |
645 | uint8_t host_connected; | |
646 | ||
bdb917bf AS |
647 | if (!s->post_load) { |
648 | return; | |
649 | } | |
650 | for (i = 0 ; i < s->post_load->nr_active_ports; ++i) { | |
651 | port = s->post_load->connected[i].port; | |
652 | host_connected = s->post_load->connected[i].host_connected; | |
80dcfb85 AL |
653 | if (host_connected != port->host_connected) { |
654 | /* | |
655 | * We have to let the guest know of the host connection | |
656 | * status change | |
657 | */ | |
658 | send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, | |
659 | port->host_connected); | |
660 | } | |
661 | } | |
bdb917bf AS |
662 | g_free(s->post_load->connected); |
663 | qemu_free_timer(s->post_load->timer); | |
664 | g_free(s->post_load); | |
665 | s->post_load = NULL; | |
80dcfb85 AL |
666 | } |
667 | ||
2e575a86 AS |
668 | static int fetch_active_ports_list(QEMUFile *f, int version_id, |
669 | VirtIOSerial *s, uint32_t nr_active_ports) | |
670 | { | |
671 | uint32_t i; | |
672 | ||
bdb917bf AS |
673 | s->post_load = g_malloc0(sizeof(*s->post_load)); |
674 | s->post_load->nr_active_ports = nr_active_ports; | |
675 | s->post_load->connected = | |
676 | g_malloc0(sizeof(*s->post_load->connected) * nr_active_ports); | |
677 | ||
678 | s->post_load->timer = qemu_new_timer_ns(vm_clock, | |
679 | virtio_serial_post_load_timer_cb, | |
680 | s); | |
2e575a86 AS |
681 | |
682 | /* Items in struct VirtIOSerialPort */ | |
683 | for (i = 0; i < nr_active_ports; i++) { | |
684 | VirtIOSerialPort *port; | |
685 | uint32_t id; | |
686 | ||
687 | id = qemu_get_be32(f); | |
688 | port = find_port_by_id(s, id); | |
689 | if (!port) { | |
690 | return -EINVAL; | |
691 | } | |
692 | ||
693 | port->guest_connected = qemu_get_byte(f); | |
bdb917bf AS |
694 | s->post_load->connected[i].port = port; |
695 | s->post_load->connected[i].host_connected = qemu_get_byte(f); | |
2e575a86 AS |
696 | |
697 | if (version_id > 2) { | |
698 | uint32_t elem_popped; | |
699 | ||
700 | qemu_get_be32s(f, &elem_popped); | |
701 | if (elem_popped) { | |
702 | qemu_get_be32s(f, &port->iov_idx); | |
703 | qemu_get_be64s(f, &port->iov_offset); | |
704 | ||
705 | qemu_get_buffer(f, (unsigned char *)&port->elem, | |
706 | sizeof(port->elem)); | |
707 | virtqueue_map_sg(port->elem.in_sg, port->elem.in_addr, | |
708 | port->elem.in_num, 1); | |
709 | virtqueue_map_sg(port->elem.out_sg, port->elem.out_addr, | |
710 | port->elem.out_num, 1); | |
711 | ||
712 | /* | |
713 | * Port was throttled on source machine. Let's | |
714 | * unthrottle it here so data starts flowing again. | |
715 | */ | |
716 | virtio_serial_throttle_port(port, false); | |
717 | } | |
718 | } | |
719 | } | |
bdb917bf | 720 | qemu_mod_timer(s->post_load->timer, 1); |
2e575a86 AS |
721 | return 0; |
722 | } | |
723 | ||
98b19252 AS |
724 | static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id) |
725 | { | |
726 | VirtIOSerial *s = opaque; | |
f83ccb3e | 727 | uint32_t max_nr_ports, nr_active_ports, ports_map; |
6663a195 | 728 | unsigned int i; |
2a633c46 | 729 | int ret; |
98b19252 | 730 | |
37f95bf3 | 731 | if (version_id > 3) { |
98b19252 AS |
732 | return -EINVAL; |
733 | } | |
6663a195 | 734 | |
98b19252 | 735 | /* The virtio device */ |
2a633c46 OW |
736 | ret = virtio_load(&s->vdev, f); |
737 | if (ret) { | |
738 | return ret; | |
739 | } | |
98b19252 AS |
740 | |
741 | if (version_id < 2) { | |
742 | return 0; | |
743 | } | |
744 | ||
745 | /* The config space */ | |
746 | qemu_get_be16s(f, &s->config.cols); | |
747 | qemu_get_be16s(f, &s->config.rows); | |
295587f7 | 748 | |
055b889f | 749 | qemu_get_be32s(f, &max_nr_ports); |
5c1c9bb2 AK |
750 | tswap32s(&max_nr_ports); |
751 | if (max_nr_ports > tswap32(s->config.max_nr_ports)) { | |
055b889f | 752 | /* Source could have had more ports than us. Fail migration. */ |
295587f7 AS |
753 | return -EINVAL; |
754 | } | |
98b19252 | 755 | |
055b889f | 756 | for (i = 0; i < (max_nr_ports + 31) / 32; i++) { |
f83ccb3e | 757 | qemu_get_be32s(f, &ports_map); |
055b889f | 758 | |
f83ccb3e | 759 | if (ports_map != s->ports_map[i]) { |
055b889f AS |
760 | /* |
761 | * Ports active on source and destination don't | |
762 | * match. Fail migration. | |
763 | */ | |
055b889f AS |
764 | return -EINVAL; |
765 | } | |
e245795b AS |
766 | } |
767 | ||
6663a195 AS |
768 | qemu_get_be32s(f, &nr_active_ports); |
769 | ||
2e575a86 AS |
770 | if (nr_active_ports) { |
771 | ret = fetch_active_ports_list(f, version_id, s, nr_active_ports); | |
772 | if (ret) { | |
773 | return ret; | |
37f95bf3 | 774 | } |
6663a195 | 775 | } |
98b19252 AS |
776 | return 0; |
777 | } | |
778 | ||
779 | static void virtser_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent); | |
780 | ||
3cb75a7c PB |
781 | static Property virtser_props[] = { |
782 | DEFINE_PROP_UINT32("nr", VirtIOSerialPort, id, VIRTIO_CONSOLE_BAD_ID), | |
783 | DEFINE_PROP_STRING("name", VirtIOSerialPort, name), | |
784 | DEFINE_PROP_END_OF_LIST() | |
785 | }; | |
786 | ||
0d936928 AL |
787 | #define TYPE_VIRTIO_SERIAL_BUS "virtio-serial-bus" |
788 | #define VIRTIO_SERIAL_BUS(obj) \ | |
789 | OBJECT_CHECK(VirtIOSerialBus, (obj), TYPE_VIRTIO_SERIAL_BUS) | |
790 | ||
791 | static void virtser_bus_class_init(ObjectClass *klass, void *data) | |
792 | { | |
793 | BusClass *k = BUS_CLASS(klass); | |
794 | k->print_dev = virtser_bus_dev_print; | |
795 | } | |
796 | ||
797 | static const TypeInfo virtser_bus_info = { | |
798 | .name = TYPE_VIRTIO_SERIAL_BUS, | |
799 | .parent = TYPE_BUS, | |
800 | .instance_size = sizeof(VirtIOSerialBus), | |
801 | .class_init = virtser_bus_class_init, | |
98b19252 AS |
802 | }; |
803 | ||
98b19252 AS |
804 | static void virtser_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent) |
805 | { | |
a43f9c90 | 806 | VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, qdev); |
98b19252 | 807 | |
021a1318 MA |
808 | monitor_printf(mon, "%*sport %d, guest %s, host %s, throttle %s\n", |
809 | indent, "", port->id, | |
810 | port->guest_connected ? "on" : "off", | |
811 | port->host_connected ? "on" : "off", | |
812 | port->throttled ? "on" : "off"); | |
98b19252 AS |
813 | } |
814 | ||
055b889f AS |
815 | /* This function is only used if a port id is not provided by the user */ |
816 | static uint32_t find_free_port_id(VirtIOSerial *vser) | |
817 | { | |
5c1c9bb2 | 818 | unsigned int i, max_nr_ports; |
055b889f | 819 | |
5c1c9bb2 AK |
820 | max_nr_ports = tswap32(vser->config.max_nr_ports); |
821 | for (i = 0; i < (max_nr_ports + 31) / 32; i++) { | |
055b889f AS |
822 | uint32_t map, bit; |
823 | ||
824 | map = vser->ports_map[i]; | |
825 | bit = ffs(~map); | |
826 | if (bit) { | |
827 | return (bit - 1) + i * 32; | |
828 | } | |
829 | } | |
830 | return VIRTIO_CONSOLE_BAD_ID; | |
831 | } | |
832 | ||
833 | static void mark_port_added(VirtIOSerial *vser, uint32_t port_id) | |
834 | { | |
835 | unsigned int i; | |
836 | ||
837 | i = port_id / 32; | |
838 | vser->ports_map[i] |= 1U << (port_id % 32); | |
839 | } | |
840 | ||
841 | static void add_port(VirtIOSerial *vser, uint32_t port_id) | |
842 | { | |
843 | mark_port_added(vser, port_id); | |
844 | ||
845 | send_control_event(find_port_by_id(vser, port_id), | |
846 | VIRTIO_CONSOLE_PORT_ADD, 1); | |
847 | } | |
848 | ||
849 | static void remove_port(VirtIOSerial *vser, uint32_t port_id) | |
850 | { | |
9ed7b059 | 851 | VirtIOSerialPort *port; |
055b889f AS |
852 | unsigned int i; |
853 | ||
854 | i = port_id / 32; | |
855 | vser->ports_map[i] &= ~(1U << (port_id % 32)); | |
856 | ||
9ed7b059 AS |
857 | port = find_port_by_id(vser, port_id); |
858 | /* Flush out any unconsumed buffers first */ | |
6bff8656 | 859 | discard_vq_data(port->ovq, &port->vser->vdev); |
9ed7b059 AS |
860 | |
861 | send_control_event(port, VIRTIO_CONSOLE_PORT_REMOVE, 1); | |
055b889f AS |
862 | } |
863 | ||
d307af79 | 864 | static int virtser_port_qdev_init(DeviceState *qdev) |
98b19252 | 865 | { |
a43f9c90 | 866 | VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, qdev); |
f82e35e3 | 867 | VirtIOSerialPortClass *vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port); |
98b19252 | 868 | VirtIOSerialBus *bus = DO_UPCAST(VirtIOSerialBus, qbus, qdev->parent_bus); |
5c1c9bb2 | 869 | int ret, max_nr_ports; |
98b19252 AS |
870 | bool plugging_port0; |
871 | ||
872 | port->vser = bus->vser; | |
199646d8 | 873 | port->bh = qemu_bh_new(flush_queued_data_bh, port); |
98b19252 | 874 | |
f82e35e3 | 875 | assert(vsc->have_data); |
03ecd2c8 | 876 | |
98b19252 AS |
877 | /* |
878 | * Is the first console port we're seeing? If so, put it up at | |
879 | * location 0. This is done for backward compatibility (old | |
880 | * kernel, new qemu). | |
881 | */ | |
f82e35e3 | 882 | plugging_port0 = vsc->is_console && !find_port_by_id(port->vser, 0); |
98b19252 | 883 | |
055b889f | 884 | if (find_port_by_id(port->vser, port->id)) { |
6daf194d | 885 | error_report("virtio-serial-bus: A port already exists at id %u", |
055b889f | 886 | port->id); |
98b19252 AS |
887 | return -1; |
888 | } | |
98b19252 | 889 | |
055b889f AS |
890 | if (port->id == VIRTIO_CONSOLE_BAD_ID) { |
891 | if (plugging_port0) { | |
892 | port->id = 0; | |
893 | } else { | |
894 | port->id = find_free_port_id(port->vser); | |
895 | if (port->id == VIRTIO_CONSOLE_BAD_ID) { | |
6daf194d | 896 | error_report("virtio-serial-bus: Maximum port limit for this device reached"); |
055b889f AS |
897 | return -1; |
898 | } | |
899 | } | |
900 | } | |
901 | ||
5c1c9bb2 AK |
902 | max_nr_ports = tswap32(port->vser->config.max_nr_ports); |
903 | if (port->id >= max_nr_ports) { | |
6daf194d | 904 | error_report("virtio-serial-bus: Out-of-range port id specified, max. allowed: %u", |
5c1c9bb2 | 905 | max_nr_ports - 1); |
055b889f AS |
906 | return -1; |
907 | } | |
908 | ||
f82e35e3 | 909 | ret = vsc->init(port); |
98b19252 AS |
910 | if (ret) { |
911 | return ret; | |
912 | } | |
913 | ||
f1925dff AS |
914 | port->elem.out_num = 0; |
915 | ||
98b19252 AS |
916 | QTAILQ_INSERT_TAIL(&port->vser->ports, port, next); |
917 | port->ivq = port->vser->ivqs[port->id]; | |
918 | port->ovq = port->vser->ovqs[port->id]; | |
919 | ||
055b889f AS |
920 | add_port(port->vser, port->id); |
921 | ||
98b19252 AS |
922 | /* Send an update to the guest about this new port added */ |
923 | virtio_notify_config(&port->vser->vdev); | |
924 | ||
925 | return ret; | |
926 | } | |
927 | ||
928 | static int virtser_port_qdev_exit(DeviceState *qdev) | |
929 | { | |
a43f9c90 | 930 | VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, qdev); |
f82e35e3 | 931 | VirtIOSerialPortClass *vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port); |
98b19252 AS |
932 | VirtIOSerial *vser = port->vser; |
933 | ||
199646d8 | 934 | qemu_bh_delete(port->bh); |
055b889f | 935 | remove_port(port->vser, port->id); |
f146ec9a | 936 | |
98b19252 AS |
937 | QTAILQ_REMOVE(&vser->ports, port, next); |
938 | ||
f82e35e3 AL |
939 | if (vsc->exit) { |
940 | vsc->exit(port); | |
a15bb0d6 | 941 | } |
98b19252 AS |
942 | return 0; |
943 | } | |
944 | ||
6b331efb | 945 | VirtIODevice *virtio_serial_init(DeviceState *dev, virtio_serial_conf *conf) |
98b19252 AS |
946 | { |
947 | VirtIOSerial *vser; | |
948 | VirtIODevice *vdev; | |
5ab4bb59 | 949 | uint32_t i, max_supported_ports; |
98b19252 | 950 | |
6b331efb | 951 | if (!conf->max_virtserial_ports) |
98b19252 AS |
952 | return NULL; |
953 | ||
5ab4bb59 AS |
954 | /* Each port takes 2 queues, and one pair is for the control queue */ |
955 | max_supported_ports = VIRTIO_PCI_QUEUE_MAX / 2 - 1; | |
956 | ||
6b331efb | 957 | if (conf->max_virtserial_ports > max_supported_ports) { |
5ab4bb59 AS |
958 | error_report("maximum ports supported: %u", max_supported_ports); |
959 | return NULL; | |
960 | } | |
961 | ||
98b19252 AS |
962 | vdev = virtio_common_init("virtio-serial", VIRTIO_ID_CONSOLE, |
963 | sizeof(struct virtio_console_config), | |
964 | sizeof(VirtIOSerial)); | |
965 | ||
966 | vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
967 | ||
968 | /* Spawn a new virtio-serial bus on which the ports will ride as devices */ | |
0d936928 | 969 | qbus_create_inplace(&vser->bus.qbus, TYPE_VIRTIO_SERIAL_BUS, dev, NULL); |
5e52e5f9 MA |
970 | vser->bus.qbus.allow_hotplug = 1; |
971 | vser->bus.vser = vser; | |
98b19252 AS |
972 | QTAILQ_INIT(&vser->ports); |
973 | ||
5e52e5f9 | 974 | vser->bus.max_nr_ports = conf->max_virtserial_ports; |
7267c094 AL |
975 | vser->ivqs = g_malloc(conf->max_virtserial_ports * sizeof(VirtQueue *)); |
976 | vser->ovqs = g_malloc(conf->max_virtserial_ports * sizeof(VirtQueue *)); | |
98b19252 AS |
977 | |
978 | /* Add a queue for host to guest transfers for port 0 (backward compat) */ | |
979 | vser->ivqs[0] = virtio_add_queue(vdev, 128, handle_input); | |
980 | /* Add a queue for guest to host transfers for port 0 (backward compat) */ | |
981 | vser->ovqs[0] = virtio_add_queue(vdev, 128, handle_output); | |
982 | ||
a01a9cb8 AS |
983 | /* TODO: host to guest notifications can get dropped |
984 | * if the queue fills up. Implement queueing in host, | |
985 | * this might also make it possible to reduce the control | |
986 | * queue size: as guest preposts buffers there, | |
987 | * this will save 4Kbyte of guest memory per entry. */ | |
988 | ||
98b19252 | 989 | /* control queue: host to guest */ |
a01a9cb8 | 990 | vser->c_ivq = virtio_add_queue(vdev, 32, control_in); |
98b19252 | 991 | /* control queue: guest to host */ |
a01a9cb8 | 992 | vser->c_ovq = virtio_add_queue(vdev, 32, control_out); |
98b19252 | 993 | |
5e52e5f9 | 994 | for (i = 1; i < vser->bus.max_nr_ports; i++) { |
98b19252 AS |
995 | /* Add a per-port queue for host to guest transfers */ |
996 | vser->ivqs[i] = virtio_add_queue(vdev, 128, handle_input); | |
997 | /* Add a per-per queue for guest to host transfers */ | |
998 | vser->ovqs[i] = virtio_add_queue(vdev, 128, handle_output); | |
999 | } | |
1000 | ||
5c1c9bb2 | 1001 | vser->config.max_nr_ports = tswap32(conf->max_virtserial_ports); |
7267c094 | 1002 | vser->ports_map = g_malloc0(((conf->max_virtserial_ports + 31) / 32) |
a132a679 | 1003 | * sizeof(vser->ports_map[0])); |
98b19252 AS |
1004 | /* |
1005 | * Reserve location 0 for a console port for backward compat | |
1006 | * (old kernel, new qemu) | |
1007 | */ | |
055b889f | 1008 | mark_port_added(vser, 0); |
98b19252 AS |
1009 | |
1010 | vser->vdev.get_features = get_features; | |
1011 | vser->vdev.get_config = get_config; | |
1012 | vser->vdev.set_config = set_config; | |
62a9fbf7 | 1013 | vser->vdev.set_status = set_status; |
43997225 | 1014 | vser->vdev.reset = vser_reset; |
98b19252 | 1015 | |
8b53a865 AS |
1016 | vser->qdev = dev; |
1017 | ||
bdb917bf AS |
1018 | vser->post_load = NULL; |
1019 | ||
98b19252 AS |
1020 | /* |
1021 | * Register for the savevm section with the virtio-console name | |
1022 | * to preserve backward compat | |
1023 | */ | |
37f95bf3 | 1024 | register_savevm(dev, "virtio-console", -1, 3, virtio_serial_save, |
98b19252 AS |
1025 | virtio_serial_load, vser); |
1026 | ||
1027 | return vdev; | |
1028 | } | |
8b53a865 AS |
1029 | |
1030 | void virtio_serial_exit(VirtIODevice *vdev) | |
1031 | { | |
1032 | VirtIOSerial *vser = DO_UPCAST(VirtIOSerial, vdev, vdev); | |
1033 | ||
1034 | unregister_savevm(vser->qdev, "virtio-console", vser); | |
1035 | ||
7267c094 AL |
1036 | g_free(vser->ivqs); |
1037 | g_free(vser->ovqs); | |
1038 | g_free(vser->ports_map); | |
bdb917bf AS |
1039 | if (vser->post_load) { |
1040 | g_free(vser->post_load->connected); | |
a75bf146 | 1041 | qemu_del_timer(vser->post_load->timer); |
bdb917bf AS |
1042 | qemu_free_timer(vser->post_load->timer); |
1043 | g_free(vser->post_load); | |
1044 | } | |
8b53a865 AS |
1045 | virtio_cleanup(vdev); |
1046 | } | |
f82e35e3 | 1047 | |
39bffca2 AL |
1048 | static void virtio_serial_port_class_init(ObjectClass *klass, void *data) |
1049 | { | |
1050 | DeviceClass *k = DEVICE_CLASS(klass); | |
1051 | k->init = virtser_port_qdev_init; | |
0d936928 | 1052 | k->bus_type = TYPE_VIRTIO_SERIAL_BUS; |
39bffca2 AL |
1053 | k->exit = virtser_port_qdev_exit; |
1054 | k->unplug = qdev_simple_unplug_cb; | |
bce54474 | 1055 | k->props = virtser_props; |
39bffca2 AL |
1056 | } |
1057 | ||
f82e35e3 AL |
1058 | static TypeInfo virtio_serial_port_type_info = { |
1059 | .name = TYPE_VIRTIO_SERIAL_PORT, | |
1060 | .parent = TYPE_DEVICE, | |
1061 | .instance_size = sizeof(VirtIOSerialPort), | |
1062 | .abstract = true, | |
1063 | .class_size = sizeof(VirtIOSerialPortClass), | |
39bffca2 | 1064 | .class_init = virtio_serial_port_class_init, |
f82e35e3 AL |
1065 | }; |
1066 | ||
83f7d43a | 1067 | static void virtio_serial_register_types(void) |
f82e35e3 | 1068 | { |
0d936928 | 1069 | type_register_static(&virtser_bus_info); |
f82e35e3 AL |
1070 | type_register_static(&virtio_serial_port_type_info); |
1071 | } | |
1072 | ||
83f7d43a | 1073 | type_init(virtio_serial_register_types) |