1 /* 2 * VIRTIO Sound Device conforming to 3 * 4 * "Virtual I/O Device (VIRTIO) Version 1.2 5 * Committee Specification Draft 01 6 * 09 May 2022" 7 * 8 * <https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html#x1-52900014> 9 * 10 * Copyright (c) 2023 Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org> 11 * Copyright (C) 2019 OpenSynergy GmbH 12 * 13 * This work is licensed under the terms of the GNU GPL, version 2 or 14 * (at your option) any later version. See the COPYING file in the 15 * top-level directory. 16 */ 17 18 #include "qemu/osdep.h" 19 #include "qemu/iov.h" 20 #include "qemu/log.h" 21 #include "qemu/error-report.h" 22 #include "qemu/lockable.h" 23 #include "exec/tswap.h" 24 #include "sysemu/runstate.h" 25 #include "trace.h" 26 #include "qapi/error.h" 27 #include "hw/audio/virtio-snd.h" 28 29 #define VIRTIO_SOUND_VM_VERSION 1 30 #define VIRTIO_SOUND_JACK_DEFAULT 0 31 #define VIRTIO_SOUND_STREAM_DEFAULT 2 32 #define VIRTIO_SOUND_CHMAP_DEFAULT 0 33 #define VIRTIO_SOUND_HDA_FN_NID 0 34 35 static void virtio_snd_pcm_out_cb(void *data, int available); 36 static void virtio_snd_process_cmdq(VirtIOSound *s); 37 static void virtio_snd_pcm_flush(VirtIOSoundPCMStream *stream); 38 static void virtio_snd_pcm_in_cb(void *data, int available); 39 static void virtio_snd_unrealize(DeviceState *dev); 40 41 static uint32_t supported_formats = BIT(VIRTIO_SND_PCM_FMT_S8) 42 | BIT(VIRTIO_SND_PCM_FMT_U8) 43 | BIT(VIRTIO_SND_PCM_FMT_S16) 44 | BIT(VIRTIO_SND_PCM_FMT_U16) 45 | BIT(VIRTIO_SND_PCM_FMT_S32) 46 | BIT(VIRTIO_SND_PCM_FMT_U32) 47 | BIT(VIRTIO_SND_PCM_FMT_FLOAT); 48 49 static uint32_t supported_rates = BIT(VIRTIO_SND_PCM_RATE_5512) 50 | BIT(VIRTIO_SND_PCM_RATE_8000) 51 | BIT(VIRTIO_SND_PCM_RATE_11025) 52 | BIT(VIRTIO_SND_PCM_RATE_16000) 53 | BIT(VIRTIO_SND_PCM_RATE_22050) 54 | BIT(VIRTIO_SND_PCM_RATE_32000) 55 | BIT(VIRTIO_SND_PCM_RATE_44100) 56 | BIT(VIRTIO_SND_PCM_RATE_48000) 57 | BIT(VIRTIO_SND_PCM_RATE_64000) 58 | BIT(VIRTIO_SND_PCM_RATE_88200) 59 | BIT(VIRTIO_SND_PCM_RATE_96000) 60 | BIT(VIRTIO_SND_PCM_RATE_176400) 61 | BIT(VIRTIO_SND_PCM_RATE_192000) 62 | BIT(VIRTIO_SND_PCM_RATE_384000); 63 64 static const VMStateDescription vmstate_virtio_snd_device = { 65 .name = TYPE_VIRTIO_SND, 66 .version_id = VIRTIO_SOUND_VM_VERSION, 67 .minimum_version_id = VIRTIO_SOUND_VM_VERSION, 68 }; 69 70 static const VMStateDescription vmstate_virtio_snd = { 71 .name = TYPE_VIRTIO_SND, 72 .unmigratable = 1, 73 .minimum_version_id = VIRTIO_SOUND_VM_VERSION, 74 .version_id = VIRTIO_SOUND_VM_VERSION, 75 .fields = (const VMStateField[]) { 76 VMSTATE_VIRTIO_DEVICE, 77 VMSTATE_END_OF_LIST() 78 }, 79 }; 80 81 static Property virtio_snd_properties[] = { 82 DEFINE_AUDIO_PROPERTIES(VirtIOSound, card), 83 DEFINE_PROP_UINT32("jacks", VirtIOSound, snd_conf.jacks, 84 VIRTIO_SOUND_JACK_DEFAULT), 85 DEFINE_PROP_UINT32("streams", VirtIOSound, snd_conf.streams, 86 VIRTIO_SOUND_STREAM_DEFAULT), 87 DEFINE_PROP_UINT32("chmaps", VirtIOSound, snd_conf.chmaps, 88 VIRTIO_SOUND_CHMAP_DEFAULT), 89 DEFINE_PROP_END_OF_LIST(), 90 }; 91 92 static void 93 virtio_snd_get_config(VirtIODevice *vdev, uint8_t *config) 94 { 95 VirtIOSound *s = VIRTIO_SND(vdev); 96 virtio_snd_config *sndconfig = 97 (virtio_snd_config *)config; 98 trace_virtio_snd_get_config(vdev, 99 s->snd_conf.jacks, 100 s->snd_conf.streams, 101 s->snd_conf.chmaps); 102 103 memcpy(sndconfig, &s->snd_conf, sizeof(s->snd_conf)); 104 cpu_to_le32s(&sndconfig->jacks); 105 cpu_to_le32s(&sndconfig->streams); 106 cpu_to_le32s(&sndconfig->chmaps); 107 108 } 109 110 static void 111 virtio_snd_set_config(VirtIODevice *vdev, const uint8_t *config) 112 { 113 VirtIOSound *s = VIRTIO_SND(vdev); 114 const virtio_snd_config *sndconfig = 115 (const virtio_snd_config *)config; 116 117 118 trace_virtio_snd_set_config(vdev, 119 s->snd_conf.jacks, 120 sndconfig->jacks, 121 s->snd_conf.streams, 122 sndconfig->streams, 123 s->snd_conf.chmaps, 124 sndconfig->chmaps); 125 126 memcpy(&s->snd_conf, sndconfig, sizeof(virtio_snd_config)); 127 le32_to_cpus(&s->snd_conf.jacks); 128 le32_to_cpus(&s->snd_conf.streams); 129 le32_to_cpus(&s->snd_conf.chmaps); 130 131 } 132 133 static void 134 virtio_snd_pcm_buffer_free(VirtIOSoundPCMBuffer *buffer) 135 { 136 g_free(buffer->elem); 137 g_free(buffer); 138 } 139 140 static void 141 virtio_snd_ctrl_cmd_free(virtio_snd_ctrl_command *cmd) 142 { 143 g_free(cmd->elem); 144 g_free(cmd); 145 } 146 147 /* 148 * Get a specific stream from the virtio sound card device. 149 * Returns NULL if @stream_id is invalid or not allocated. 150 * 151 * @s: VirtIOSound device 152 * @stream_id: stream id 153 */ 154 static VirtIOSoundPCMStream *virtio_snd_pcm_get_stream(VirtIOSound *s, 155 uint32_t stream_id) 156 { 157 return stream_id >= s->snd_conf.streams ? NULL : 158 s->pcm->streams[stream_id]; 159 } 160 161 /* 162 * Get params for a specific stream. 163 * 164 * @s: VirtIOSound device 165 * @stream_id: stream id 166 */ 167 static virtio_snd_pcm_set_params *virtio_snd_pcm_get_params(VirtIOSound *s, 168 uint32_t stream_id) 169 { 170 return stream_id >= s->snd_conf.streams ? NULL 171 : &s->pcm->pcm_params[stream_id]; 172 } 173 174 /* 175 * Handle the VIRTIO_SND_R_PCM_INFO request. 176 * The function writes the info structs to the request element. 177 * 178 * @s: VirtIOSound device 179 * @cmd: The request command queue element from VirtIOSound cmdq field 180 */ 181 static void virtio_snd_handle_pcm_info(VirtIOSound *s, 182 virtio_snd_ctrl_command *cmd) 183 { 184 uint32_t stream_id, start_id, count, size; 185 virtio_snd_pcm_info val; 186 virtio_snd_query_info req; 187 VirtIOSoundPCMStream *stream = NULL; 188 g_autofree virtio_snd_pcm_info *pcm_info = NULL; 189 size_t msg_sz = iov_to_buf(cmd->elem->out_sg, 190 cmd->elem->out_num, 191 0, 192 &req, 193 sizeof(virtio_snd_query_info)); 194 195 if (msg_sz != sizeof(virtio_snd_query_info)) { 196 /* 197 * TODO: do we need to set DEVICE_NEEDS_RESET? 198 */ 199 qemu_log_mask(LOG_GUEST_ERROR, 200 "%s: virtio-snd command size incorrect %zu vs \ 201 %zu\n", __func__, msg_sz, sizeof(virtio_snd_query_info)); 202 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 203 return; 204 } 205 206 start_id = le32_to_cpu(req.start_id); 207 count = le32_to_cpu(req.count); 208 size = le32_to_cpu(req.size); 209 210 if (iov_size(cmd->elem->in_sg, cmd->elem->in_num) < 211 sizeof(virtio_snd_hdr) + size * count) { 212 /* 213 * TODO: do we need to set DEVICE_NEEDS_RESET? 214 */ 215 error_report("pcm info: buffer too small, got: %zu, needed: %zu", 216 iov_size(cmd->elem->in_sg, cmd->elem->in_num), 217 sizeof(virtio_snd_pcm_info)); 218 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 219 return; 220 } 221 222 pcm_info = g_new0(virtio_snd_pcm_info, count); 223 for (uint32_t i = 0; i < count; i++) { 224 stream_id = i + start_id; 225 trace_virtio_snd_handle_pcm_info(stream_id); 226 stream = virtio_snd_pcm_get_stream(s, stream_id); 227 if (!stream) { 228 error_report("Invalid stream id: %"PRIu32, stream_id); 229 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 230 return; 231 } 232 val = stream->info; 233 val.hdr.hda_fn_nid = cpu_to_le32(val.hdr.hda_fn_nid); 234 val.features = cpu_to_le32(val.features); 235 val.formats = cpu_to_le64(val.formats); 236 val.rates = cpu_to_le64(val.rates); 237 /* 238 * 5.14.6.6.2.1 Device Requirements: Stream Information The device MUST 239 * NOT set undefined feature, format, rate and direction values. The 240 * device MUST initialize the padding bytes to 0. 241 */ 242 pcm_info[i] = val; 243 memset(&pcm_info[i].padding, 0, 5); 244 } 245 246 cmd->payload_size = sizeof(virtio_snd_pcm_info) * count; 247 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_OK); 248 iov_from_buf(cmd->elem->in_sg, 249 cmd->elem->in_num, 250 sizeof(virtio_snd_hdr), 251 pcm_info, 252 cmd->payload_size); 253 } 254 255 /* 256 * Set the given stream params. 257 * Called by both virtio_snd_handle_pcm_set_params and during device 258 * initialization. 259 * Returns the response status code. (VIRTIO_SND_S_*). 260 * 261 * @s: VirtIOSound device 262 * @params: The PCM params as defined in the virtio specification 263 */ 264 static 265 uint32_t virtio_snd_set_pcm_params(VirtIOSound *s, 266 uint32_t stream_id, 267 virtio_snd_pcm_set_params *params) 268 { 269 virtio_snd_pcm_set_params *st_params; 270 271 if (stream_id >= s->snd_conf.streams || s->pcm->pcm_params == NULL) { 272 /* 273 * TODO: do we need to set DEVICE_NEEDS_RESET? 274 */ 275 virtio_error(VIRTIO_DEVICE(s), "Streams have not been initialized.\n"); 276 return cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 277 } 278 279 st_params = virtio_snd_pcm_get_params(s, stream_id); 280 281 if (params->channels < 1 || params->channels > AUDIO_MAX_CHANNELS) { 282 error_report("Number of channels is not supported."); 283 return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); 284 } 285 if (!(supported_formats & BIT(params->format))) { 286 error_report("Stream format is not supported."); 287 return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); 288 } 289 if (!(supported_rates & BIT(params->rate))) { 290 error_report("Stream rate is not supported."); 291 return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); 292 } 293 294 st_params->buffer_bytes = le32_to_cpu(params->buffer_bytes); 295 st_params->period_bytes = le32_to_cpu(params->period_bytes); 296 st_params->features = le32_to_cpu(params->features); 297 /* the following are uint8_t, so there's no need to bswap the values. */ 298 st_params->channels = params->channels; 299 st_params->format = params->format; 300 st_params->rate = params->rate; 301 302 return cpu_to_le32(VIRTIO_SND_S_OK); 303 } 304 305 /* 306 * Handles the VIRTIO_SND_R_PCM_SET_PARAMS request. 307 * 308 * @s: VirtIOSound device 309 * @cmd: The request command queue element from VirtIOSound cmdq field 310 */ 311 static void virtio_snd_handle_pcm_set_params(VirtIOSound *s, 312 virtio_snd_ctrl_command *cmd) 313 { 314 virtio_snd_pcm_set_params req = { 0 }; 315 uint32_t stream_id; 316 size_t msg_sz = iov_to_buf(cmd->elem->out_sg, 317 cmd->elem->out_num, 318 0, 319 &req, 320 sizeof(virtio_snd_pcm_set_params)); 321 322 if (msg_sz != sizeof(virtio_snd_pcm_set_params)) { 323 /* 324 * TODO: do we need to set DEVICE_NEEDS_RESET? 325 */ 326 qemu_log_mask(LOG_GUEST_ERROR, 327 "%s: virtio-snd command size incorrect %zu vs \ 328 %zu\n", __func__, msg_sz, sizeof(virtio_snd_pcm_set_params)); 329 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 330 return; 331 } 332 stream_id = le32_to_cpu(req.hdr.stream_id); 333 trace_virtio_snd_handle_pcm_set_params(stream_id); 334 cmd->resp.code = virtio_snd_set_pcm_params(s, stream_id, &req); 335 } 336 337 /* 338 * Get a QEMU Audiosystem compatible format value from a VIRTIO_SND_PCM_FMT_* 339 */ 340 static AudioFormat virtio_snd_get_qemu_format(uint32_t format) 341 { 342 #define CASE(FMT) \ 343 case VIRTIO_SND_PCM_FMT_##FMT: \ 344 return AUDIO_FORMAT_##FMT; 345 346 switch (format) { 347 CASE(U8) 348 CASE(S8) 349 CASE(U16) 350 CASE(S16) 351 CASE(U32) 352 CASE(S32) 353 case VIRTIO_SND_PCM_FMT_FLOAT: 354 return AUDIO_FORMAT_F32; 355 default: 356 g_assert_not_reached(); 357 } 358 359 #undef CASE 360 } 361 362 /* 363 * Get a QEMU Audiosystem compatible frequency value from a 364 * VIRTIO_SND_PCM_RATE_* 365 */ 366 static uint32_t virtio_snd_get_qemu_freq(uint32_t rate) 367 { 368 #define CASE(RATE) \ 369 case VIRTIO_SND_PCM_RATE_##RATE: \ 370 return RATE; 371 372 switch (rate) { 373 CASE(5512) 374 CASE(8000) 375 CASE(11025) 376 CASE(16000) 377 CASE(22050) 378 CASE(32000) 379 CASE(44100) 380 CASE(48000) 381 CASE(64000) 382 CASE(88200) 383 CASE(96000) 384 CASE(176400) 385 CASE(192000) 386 CASE(384000) 387 default: 388 g_assert_not_reached(); 389 } 390 391 #undef CASE 392 } 393 394 /* 395 * Get QEMU Audiosystem compatible audsettings from virtio based pcm stream 396 * params. 397 */ 398 static void virtio_snd_get_qemu_audsettings(audsettings *as, 399 virtio_snd_pcm_set_params *params) 400 { 401 as->nchannels = MIN(AUDIO_MAX_CHANNELS, params->channels); 402 as->fmt = virtio_snd_get_qemu_format(params->format); 403 as->freq = virtio_snd_get_qemu_freq(params->rate); 404 as->endianness = 0; /* Conforming to VIRTIO 1.0: always little endian. */ 405 } 406 407 /* 408 * Close a stream and free all its resources. 409 * 410 * @stream: VirtIOSoundPCMStream *stream 411 */ 412 static void virtio_snd_pcm_close(VirtIOSoundPCMStream *stream) 413 { 414 if (stream) { 415 virtio_snd_pcm_flush(stream); 416 if (stream->info.direction == VIRTIO_SND_D_OUTPUT) { 417 AUD_close_out(&stream->pcm->snd->card, stream->voice.out); 418 stream->voice.out = NULL; 419 } else if (stream->info.direction == VIRTIO_SND_D_INPUT) { 420 AUD_close_in(&stream->pcm->snd->card, stream->voice.in); 421 stream->voice.in = NULL; 422 } 423 } 424 } 425 426 /* 427 * Prepares a VirtIOSound card stream. 428 * Returns the response status code. (VIRTIO_SND_S_*). 429 * 430 * @s: VirtIOSound device 431 * @stream_id: stream id 432 */ 433 static uint32_t virtio_snd_pcm_prepare(VirtIOSound *s, uint32_t stream_id) 434 { 435 audsettings as; 436 virtio_snd_pcm_set_params *params; 437 VirtIOSoundPCMStream *stream; 438 439 if (s->pcm->streams == NULL || 440 s->pcm->pcm_params == NULL || 441 stream_id >= s->snd_conf.streams) { 442 return cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 443 } 444 445 params = virtio_snd_pcm_get_params(s, stream_id); 446 if (params == NULL) { 447 return cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 448 } 449 450 stream = virtio_snd_pcm_get_stream(s, stream_id); 451 if (stream == NULL) { 452 stream = g_new0(VirtIOSoundPCMStream, 1); 453 stream->active = false; 454 stream->id = stream_id; 455 stream->pcm = s->pcm; 456 stream->s = s; 457 qemu_mutex_init(&stream->queue_mutex); 458 QSIMPLEQ_INIT(&stream->queue); 459 460 /* 461 * stream_id >= s->snd_conf.streams was checked before so this is 462 * in-bounds 463 */ 464 s->pcm->streams[stream_id] = stream; 465 } 466 467 virtio_snd_get_qemu_audsettings(&as, params); 468 stream->info.direction = stream_id < s->snd_conf.streams / 2 + 469 (s->snd_conf.streams & 1) ? VIRTIO_SND_D_OUTPUT : VIRTIO_SND_D_INPUT; 470 stream->info.hdr.hda_fn_nid = VIRTIO_SOUND_HDA_FN_NID; 471 stream->info.features = 0; 472 stream->info.channels_min = 1; 473 stream->info.channels_max = as.nchannels; 474 stream->info.formats = supported_formats; 475 stream->info.rates = supported_rates; 476 stream->params = *params; 477 478 stream->positions[0] = VIRTIO_SND_CHMAP_FL; 479 stream->positions[1] = VIRTIO_SND_CHMAP_FR; 480 stream->as = as; 481 482 if (stream->info.direction == VIRTIO_SND_D_OUTPUT) { 483 stream->voice.out = AUD_open_out(&s->card, 484 stream->voice.out, 485 "virtio-sound.out", 486 stream, 487 virtio_snd_pcm_out_cb, 488 &as); 489 AUD_set_volume_out(stream->voice.out, 0, 255, 255); 490 } else { 491 stream->voice.in = AUD_open_in(&s->card, 492 stream->voice.in, 493 "virtio-sound.in", 494 stream, 495 virtio_snd_pcm_in_cb, 496 &as); 497 AUD_set_volume_in(stream->voice.in, 0, 255, 255); 498 } 499 500 return cpu_to_le32(VIRTIO_SND_S_OK); 501 } 502 503 static const char *print_code(uint32_t code) 504 { 505 #define CASE(CODE) \ 506 case VIRTIO_SND_R_##CODE: \ 507 return "VIRTIO_SND_R_"#CODE 508 509 switch (code) { 510 CASE(JACK_INFO); 511 CASE(JACK_REMAP); 512 CASE(PCM_INFO); 513 CASE(PCM_SET_PARAMS); 514 CASE(PCM_PREPARE); 515 CASE(PCM_RELEASE); 516 CASE(PCM_START); 517 CASE(PCM_STOP); 518 CASE(CHMAP_INFO); 519 default: 520 return "invalid code"; 521 } 522 523 #undef CASE 524 }; 525 526 /* 527 * Handles VIRTIO_SND_R_PCM_PREPARE. 528 * 529 * @s: VirtIOSound device 530 * @cmd: The request command queue element from VirtIOSound cmdq field 531 */ 532 static void virtio_snd_handle_pcm_prepare(VirtIOSound *s, 533 virtio_snd_ctrl_command *cmd) 534 { 535 uint32_t stream_id; 536 size_t msg_sz = iov_to_buf(cmd->elem->out_sg, 537 cmd->elem->out_num, 538 sizeof(virtio_snd_hdr), 539 &stream_id, 540 sizeof(stream_id)); 541 542 stream_id = le32_to_cpu(stream_id); 543 cmd->resp.code = msg_sz == sizeof(stream_id) 544 ? virtio_snd_pcm_prepare(s, stream_id) 545 : cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 546 } 547 548 /* 549 * Handles VIRTIO_SND_R_PCM_START. 550 * 551 * @s: VirtIOSound device 552 * @cmd: The request command queue element from VirtIOSound cmdq field 553 * @start: whether to start or stop the device 554 */ 555 static void virtio_snd_handle_pcm_start_stop(VirtIOSound *s, 556 virtio_snd_ctrl_command *cmd, 557 bool start) 558 { 559 VirtIOSoundPCMStream *stream; 560 virtio_snd_pcm_hdr req; 561 uint32_t stream_id; 562 size_t msg_sz = iov_to_buf(cmd->elem->out_sg, 563 cmd->elem->out_num, 564 0, 565 &req, 566 sizeof(virtio_snd_pcm_hdr)); 567 568 if (msg_sz != sizeof(virtio_snd_pcm_hdr)) { 569 qemu_log_mask(LOG_GUEST_ERROR, 570 "%s: virtio-snd command size incorrect %zu vs \ 571 %zu\n", __func__, msg_sz, sizeof(virtio_snd_pcm_hdr)); 572 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 573 return; 574 } 575 576 stream_id = le32_to_cpu(req.stream_id); 577 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_OK); 578 trace_virtio_snd_handle_pcm_start_stop(start ? "VIRTIO_SND_R_PCM_START" : 579 "VIRTIO_SND_R_PCM_STOP", stream_id); 580 581 stream = virtio_snd_pcm_get_stream(s, stream_id); 582 if (stream) { 583 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 584 stream->active = start; 585 } 586 if (stream->info.direction == VIRTIO_SND_D_OUTPUT) { 587 AUD_set_active_out(stream->voice.out, start); 588 } else { 589 AUD_set_active_in(stream->voice.in, start); 590 } 591 } else { 592 error_report("Invalid stream id: %"PRIu32, stream_id); 593 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 594 return; 595 } 596 stream->active = start; 597 } 598 599 /* 600 * Returns the number of I/O messages that are being processed. 601 * 602 * @stream: VirtIOSoundPCMStream 603 */ 604 static size_t virtio_snd_pcm_get_io_msgs_count(VirtIOSoundPCMStream *stream) 605 { 606 VirtIOSoundPCMBuffer *buffer, *next; 607 size_t count = 0; 608 609 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 610 QSIMPLEQ_FOREACH_SAFE(buffer, &stream->queue, entry, next) { 611 count += 1; 612 } 613 } 614 return count; 615 } 616 617 /* 618 * Handles VIRTIO_SND_R_PCM_RELEASE. 619 * 620 * @s: VirtIOSound device 621 * @cmd: The request command queue element from VirtIOSound cmdq field 622 */ 623 static void virtio_snd_handle_pcm_release(VirtIOSound *s, 624 virtio_snd_ctrl_command *cmd) 625 { 626 uint32_t stream_id; 627 VirtIOSoundPCMStream *stream; 628 size_t msg_sz = iov_to_buf(cmd->elem->out_sg, 629 cmd->elem->out_num, 630 sizeof(virtio_snd_hdr), 631 &stream_id, 632 sizeof(stream_id)); 633 634 if (msg_sz != sizeof(stream_id)) { 635 /* 636 * TODO: do we need to set DEVICE_NEEDS_RESET? 637 */ 638 qemu_log_mask(LOG_GUEST_ERROR, 639 "%s: virtio-snd command size incorrect %zu vs \ 640 %zu\n", __func__, msg_sz, sizeof(stream_id)); 641 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 642 return; 643 } 644 645 stream_id = le32_to_cpu(stream_id); 646 trace_virtio_snd_handle_pcm_release(stream_id); 647 stream = virtio_snd_pcm_get_stream(s, stream_id); 648 if (stream == NULL) { 649 /* 650 * TODO: do we need to set DEVICE_NEEDS_RESET? 651 */ 652 error_report("already released stream %"PRIu32, stream_id); 653 virtio_error(VIRTIO_DEVICE(s), 654 "already released stream %"PRIu32, 655 stream_id); 656 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 657 return; 658 } 659 660 if (virtio_snd_pcm_get_io_msgs_count(stream)) { 661 /* 662 * virtio-v1.2-csd01, 5.14.6.6.5.1, 663 * Device Requirements: Stream Release 664 * 665 * - The device MUST complete all pending I/O messages for the 666 * specified stream ID. 667 * - The device MUST NOT complete the control request while there 668 * are pending I/O messages for the specified stream ID. 669 */ 670 trace_virtio_snd_pcm_stream_flush(stream_id); 671 virtio_snd_pcm_flush(stream); 672 } 673 674 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_OK); 675 } 676 677 /* 678 * The actual processing done in virtio_snd_process_cmdq(). 679 * 680 * @s: VirtIOSound device 681 * @cmd: control command request 682 */ 683 static inline void 684 process_cmd(VirtIOSound *s, virtio_snd_ctrl_command *cmd) 685 { 686 uint32_t code; 687 size_t msg_sz = iov_to_buf(cmd->elem->out_sg, 688 cmd->elem->out_num, 689 0, 690 &cmd->ctrl, 691 sizeof(virtio_snd_hdr)); 692 693 if (msg_sz != sizeof(virtio_snd_hdr)) { 694 /* 695 * TODO: do we need to set DEVICE_NEEDS_RESET? 696 */ 697 qemu_log_mask(LOG_GUEST_ERROR, 698 "%s: virtio-snd command size incorrect %zu vs \ 699 %zu\n", __func__, msg_sz, sizeof(virtio_snd_hdr)); 700 return; 701 } 702 703 code = le32_to_cpu(cmd->ctrl.code); 704 705 trace_virtio_snd_handle_code(code, print_code(code)); 706 707 switch (code) { 708 case VIRTIO_SND_R_JACK_INFO: 709 case VIRTIO_SND_R_JACK_REMAP: 710 qemu_log_mask(LOG_UNIMP, 711 "virtio_snd: jack functionality is unimplemented.\n"); 712 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); 713 break; 714 case VIRTIO_SND_R_PCM_INFO: 715 virtio_snd_handle_pcm_info(s, cmd); 716 break; 717 case VIRTIO_SND_R_PCM_START: 718 virtio_snd_handle_pcm_start_stop(s, cmd, true); 719 break; 720 case VIRTIO_SND_R_PCM_STOP: 721 virtio_snd_handle_pcm_start_stop(s, cmd, false); 722 break; 723 case VIRTIO_SND_R_PCM_SET_PARAMS: 724 virtio_snd_handle_pcm_set_params(s, cmd); 725 break; 726 case VIRTIO_SND_R_PCM_PREPARE: 727 virtio_snd_handle_pcm_prepare(s, cmd); 728 break; 729 case VIRTIO_SND_R_PCM_RELEASE: 730 virtio_snd_handle_pcm_release(s, cmd); 731 break; 732 case VIRTIO_SND_R_CHMAP_INFO: 733 qemu_log_mask(LOG_UNIMP, 734 "virtio_snd: chmap info functionality is unimplemented.\n"); 735 trace_virtio_snd_handle_chmap_info(); 736 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); 737 break; 738 default: 739 /* error */ 740 error_report("virtio snd header not recognized: %"PRIu32, code); 741 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 742 } 743 744 iov_from_buf(cmd->elem->in_sg, 745 cmd->elem->in_num, 746 0, 747 &cmd->resp, 748 sizeof(virtio_snd_hdr)); 749 virtqueue_push(cmd->vq, cmd->elem, 750 sizeof(virtio_snd_hdr) + cmd->payload_size); 751 virtio_notify(VIRTIO_DEVICE(s), cmd->vq); 752 } 753 754 /* 755 * Consume all elements in command queue. 756 * 757 * @s: VirtIOSound device 758 */ 759 static void virtio_snd_process_cmdq(VirtIOSound *s) 760 { 761 virtio_snd_ctrl_command *cmd; 762 763 if (unlikely(qatomic_read(&s->processing_cmdq))) { 764 return; 765 } 766 767 WITH_QEMU_LOCK_GUARD(&s->cmdq_mutex) { 768 qatomic_set(&s->processing_cmdq, true); 769 while (!QTAILQ_EMPTY(&s->cmdq)) { 770 cmd = QTAILQ_FIRST(&s->cmdq); 771 772 /* process command */ 773 process_cmd(s, cmd); 774 775 QTAILQ_REMOVE(&s->cmdq, cmd, next); 776 777 virtio_snd_ctrl_cmd_free(cmd); 778 } 779 qatomic_set(&s->processing_cmdq, false); 780 } 781 } 782 783 /* 784 * The control message handler. Pops an element from the control virtqueue, 785 * and stores them to VirtIOSound's cmdq queue and finally calls 786 * virtio_snd_process_cmdq() for processing. 787 * 788 * @vdev: VirtIOSound device 789 * @vq: Control virtqueue 790 */ 791 static void virtio_snd_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) 792 { 793 VirtIOSound *s = VIRTIO_SND(vdev); 794 VirtQueueElement *elem; 795 virtio_snd_ctrl_command *cmd; 796 797 trace_virtio_snd_handle_ctrl(vdev, vq); 798 799 if (!virtio_queue_ready(vq)) { 800 return; 801 } 802 803 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 804 while (elem) { 805 cmd = g_new0(virtio_snd_ctrl_command, 1); 806 cmd->elem = elem; 807 cmd->vq = vq; 808 cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_OK); 809 /* implicit cmd->payload_size = 0; */ 810 QTAILQ_INSERT_TAIL(&s->cmdq, cmd, next); 811 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 812 } 813 814 virtio_snd_process_cmdq(s); 815 } 816 817 /* 818 * The event virtqueue handler. 819 * Not implemented yet. 820 * 821 * @vdev: VirtIOSound device 822 * @vq: event vq 823 */ 824 static void virtio_snd_handle_event(VirtIODevice *vdev, VirtQueue *vq) 825 { 826 qemu_log_mask(LOG_UNIMP, "virtio_snd: event queue is unimplemented.\n"); 827 trace_virtio_snd_handle_event(); 828 } 829 830 /* 831 * Must only be called if vsnd->invalid is not empty. 832 */ 833 static inline void empty_invalid_queue(VirtIODevice *vdev, VirtQueue *vq) 834 { 835 VirtIOSoundPCMBuffer *buffer = NULL; 836 virtio_snd_pcm_status resp = { 0 }; 837 VirtIOSound *vsnd = VIRTIO_SND(vdev); 838 839 g_assert(!QSIMPLEQ_EMPTY(&vsnd->invalid)); 840 841 while (!QSIMPLEQ_EMPTY(&vsnd->invalid)) { 842 buffer = QSIMPLEQ_FIRST(&vsnd->invalid); 843 /* If buffer->vq != vq, our logic is fundamentally wrong, so bail out */ 844 g_assert(buffer->vq == vq); 845 846 resp.status = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); 847 iov_from_buf(buffer->elem->in_sg, 848 buffer->elem->in_num, 849 0, 850 &resp, 851 sizeof(virtio_snd_pcm_status)); 852 virtqueue_push(vq, 853 buffer->elem, 854 sizeof(virtio_snd_pcm_status)); 855 QSIMPLEQ_REMOVE_HEAD(&vsnd->invalid, entry); 856 virtio_snd_pcm_buffer_free(buffer); 857 } 858 /* Notify vq about virtio_snd_pcm_status responses. */ 859 virtio_notify(vdev, vq); 860 } 861 862 /* 863 * The tx virtqueue handler. Makes the buffers available to their respective 864 * streams for consumption. 865 * 866 * @vdev: VirtIOSound device 867 * @vq: tx virtqueue 868 */ 869 static void virtio_snd_handle_tx_xfer(VirtIODevice *vdev, VirtQueue *vq) 870 { 871 VirtIOSound *vsnd = VIRTIO_SND(vdev); 872 VirtIOSoundPCMBuffer *buffer; 873 VirtQueueElement *elem; 874 size_t msg_sz, size; 875 virtio_snd_pcm_xfer hdr; 876 uint32_t stream_id; 877 /* 878 * If any of the I/O messages are invalid, put them in vsnd->invalid and 879 * return them after the for loop. 880 */ 881 bool must_empty_invalid_queue = false; 882 883 if (!virtio_queue_ready(vq)) { 884 return; 885 } 886 trace_virtio_snd_handle_tx_xfer(); 887 888 for (;;) { 889 VirtIOSoundPCMStream *stream; 890 891 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 892 if (!elem) { 893 break; 894 } 895 /* get the message hdr object */ 896 msg_sz = iov_to_buf(elem->out_sg, 897 elem->out_num, 898 0, 899 &hdr, 900 sizeof(virtio_snd_pcm_xfer)); 901 if (msg_sz != sizeof(virtio_snd_pcm_xfer)) { 902 goto tx_err; 903 } 904 stream_id = le32_to_cpu(hdr.stream_id); 905 906 if (stream_id >= vsnd->snd_conf.streams 907 || vsnd->pcm->streams[stream_id] == NULL) { 908 goto tx_err; 909 } 910 911 stream = vsnd->pcm->streams[stream_id]; 912 if (stream->info.direction != VIRTIO_SND_D_OUTPUT) { 913 goto tx_err; 914 } 915 916 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 917 size = iov_size(elem->out_sg, elem->out_num) - msg_sz; 918 919 buffer = g_malloc0(sizeof(VirtIOSoundPCMBuffer) + size); 920 buffer->elem = elem; 921 buffer->populated = false; 922 buffer->vq = vq; 923 buffer->size = size; 924 buffer->offset = 0; 925 926 QSIMPLEQ_INSERT_TAIL(&stream->queue, buffer, entry); 927 } 928 continue; 929 930 tx_err: 931 must_empty_invalid_queue = true; 932 buffer = g_malloc0(sizeof(VirtIOSoundPCMBuffer)); 933 buffer->elem = elem; 934 buffer->vq = vq; 935 QSIMPLEQ_INSERT_TAIL(&vsnd->invalid, buffer, entry); 936 } 937 938 if (must_empty_invalid_queue) { 939 empty_invalid_queue(vdev, vq); 940 } 941 } 942 943 /* 944 * The rx virtqueue handler. Makes the buffers available to their respective 945 * streams for consumption. 946 * 947 * @vdev: VirtIOSound device 948 * @vq: rx virtqueue 949 */ 950 static void virtio_snd_handle_rx_xfer(VirtIODevice *vdev, VirtQueue *vq) 951 { 952 VirtIOSound *vsnd = VIRTIO_SND(vdev); 953 VirtIOSoundPCMBuffer *buffer; 954 VirtQueueElement *elem; 955 size_t msg_sz, size; 956 virtio_snd_pcm_xfer hdr; 957 uint32_t stream_id; 958 /* 959 * if any of the I/O messages are invalid, put them in vsnd->invalid and 960 * return them after the for loop. 961 */ 962 bool must_empty_invalid_queue = false; 963 964 if (!virtio_queue_ready(vq)) { 965 return; 966 } 967 trace_virtio_snd_handle_rx_xfer(); 968 969 for (;;) { 970 VirtIOSoundPCMStream *stream; 971 972 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 973 if (!elem) { 974 break; 975 } 976 /* get the message hdr object */ 977 msg_sz = iov_to_buf(elem->out_sg, 978 elem->out_num, 979 0, 980 &hdr, 981 sizeof(virtio_snd_pcm_xfer)); 982 if (msg_sz != sizeof(virtio_snd_pcm_xfer)) { 983 goto rx_err; 984 } 985 stream_id = le32_to_cpu(hdr.stream_id); 986 987 if (stream_id >= vsnd->snd_conf.streams 988 || !vsnd->pcm->streams[stream_id]) { 989 goto rx_err; 990 } 991 992 stream = vsnd->pcm->streams[stream_id]; 993 if (stream == NULL || stream->info.direction != VIRTIO_SND_D_INPUT) { 994 goto rx_err; 995 } 996 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 997 size = iov_size(elem->in_sg, elem->in_num) - 998 sizeof(virtio_snd_pcm_status); 999 buffer = g_malloc0(sizeof(VirtIOSoundPCMBuffer) + size); 1000 buffer->elem = elem; 1001 buffer->vq = vq; 1002 buffer->size = 0; 1003 buffer->offset = 0; 1004 QSIMPLEQ_INSERT_TAIL(&stream->queue, buffer, entry); 1005 } 1006 continue; 1007 1008 rx_err: 1009 must_empty_invalid_queue = true; 1010 buffer = g_malloc0(sizeof(VirtIOSoundPCMBuffer)); 1011 buffer->elem = elem; 1012 buffer->vq = vq; 1013 QSIMPLEQ_INSERT_TAIL(&vsnd->invalid, buffer, entry); 1014 } 1015 1016 if (must_empty_invalid_queue) { 1017 empty_invalid_queue(vdev, vq); 1018 } 1019 } 1020 1021 static uint64_t get_features(VirtIODevice *vdev, uint64_t features, 1022 Error **errp) 1023 { 1024 /* 1025 * virtio-v1.2-csd01, 5.14.3, 1026 * Feature Bits 1027 * None currently defined. 1028 */ 1029 VirtIOSound *s = VIRTIO_SND(vdev); 1030 features |= s->features; 1031 1032 trace_virtio_snd_get_features(vdev, features); 1033 1034 return features; 1035 } 1036 1037 static void 1038 virtio_snd_vm_state_change(void *opaque, bool running, 1039 RunState state) 1040 { 1041 if (running) { 1042 trace_virtio_snd_vm_state_running(); 1043 } else { 1044 trace_virtio_snd_vm_state_stopped(); 1045 } 1046 } 1047 1048 static void virtio_snd_realize(DeviceState *dev, Error **errp) 1049 { 1050 ERRP_GUARD(); 1051 VirtIOSound *vsnd = VIRTIO_SND(dev); 1052 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1053 virtio_snd_pcm_set_params default_params = { 0 }; 1054 uint32_t status; 1055 1056 trace_virtio_snd_realize(vsnd); 1057 1058 /* check number of jacks and streams */ 1059 if (vsnd->snd_conf.jacks > 8) { 1060 error_setg(errp, 1061 "Invalid number of jacks: %"PRIu32, 1062 vsnd->snd_conf.jacks); 1063 return; 1064 } 1065 if (vsnd->snd_conf.streams < 1 || vsnd->snd_conf.streams > 10) { 1066 error_setg(errp, 1067 "Invalid number of streams: %"PRIu32, 1068 vsnd->snd_conf.streams); 1069 return; 1070 } 1071 1072 if (vsnd->snd_conf.chmaps > VIRTIO_SND_CHMAP_MAX_SIZE) { 1073 error_setg(errp, 1074 "Invalid number of channel maps: %"PRIu32, 1075 vsnd->snd_conf.chmaps); 1076 return; 1077 } 1078 1079 if (!AUD_register_card("virtio-sound", &vsnd->card, errp)) { 1080 return; 1081 } 1082 1083 vsnd->vmstate = 1084 qemu_add_vm_change_state_handler(virtio_snd_vm_state_change, vsnd); 1085 1086 vsnd->pcm = g_new0(VirtIOSoundPCM, 1); 1087 vsnd->pcm->snd = vsnd; 1088 vsnd->pcm->streams = 1089 g_new0(VirtIOSoundPCMStream *, vsnd->snd_conf.streams); 1090 vsnd->pcm->pcm_params = 1091 g_new0(virtio_snd_pcm_set_params, vsnd->snd_conf.streams); 1092 1093 virtio_init(vdev, VIRTIO_ID_SOUND, sizeof(virtio_snd_config)); 1094 virtio_add_feature(&vsnd->features, VIRTIO_F_VERSION_1); 1095 1096 /* set default params for all streams */ 1097 default_params.features = 0; 1098 default_params.buffer_bytes = cpu_to_le32(8192); 1099 default_params.period_bytes = cpu_to_le32(2048); 1100 default_params.channels = 2; 1101 default_params.format = VIRTIO_SND_PCM_FMT_S16; 1102 default_params.rate = VIRTIO_SND_PCM_RATE_48000; 1103 vsnd->queues[VIRTIO_SND_VQ_CONTROL] = 1104 virtio_add_queue(vdev, 64, virtio_snd_handle_ctrl); 1105 vsnd->queues[VIRTIO_SND_VQ_EVENT] = 1106 virtio_add_queue(vdev, 64, virtio_snd_handle_event); 1107 vsnd->queues[VIRTIO_SND_VQ_TX] = 1108 virtio_add_queue(vdev, 64, virtio_snd_handle_tx_xfer); 1109 vsnd->queues[VIRTIO_SND_VQ_RX] = 1110 virtio_add_queue(vdev, 64, virtio_snd_handle_rx_xfer); 1111 qemu_mutex_init(&vsnd->cmdq_mutex); 1112 QTAILQ_INIT(&vsnd->cmdq); 1113 QSIMPLEQ_INIT(&vsnd->invalid); 1114 1115 for (uint32_t i = 0; i < vsnd->snd_conf.streams; i++) { 1116 status = virtio_snd_set_pcm_params(vsnd, i, &default_params); 1117 if (status != cpu_to_le32(VIRTIO_SND_S_OK)) { 1118 error_setg(errp, 1119 "Can't initialize stream params, device responded with %s.", 1120 print_code(status)); 1121 goto error_cleanup; 1122 } 1123 status = virtio_snd_pcm_prepare(vsnd, i); 1124 if (status != cpu_to_le32(VIRTIO_SND_S_OK)) { 1125 error_setg(errp, 1126 "Can't prepare streams, device responded with %s.", 1127 print_code(status)); 1128 goto error_cleanup; 1129 } 1130 } 1131 1132 return; 1133 1134 error_cleanup: 1135 virtio_snd_unrealize(dev); 1136 } 1137 1138 static inline void return_tx_buffer(VirtIOSoundPCMStream *stream, 1139 VirtIOSoundPCMBuffer *buffer) 1140 { 1141 virtio_snd_pcm_status resp = { 0 }; 1142 resp.status = cpu_to_le32(VIRTIO_SND_S_OK); 1143 resp.latency_bytes = cpu_to_le32((uint32_t)buffer->size); 1144 iov_from_buf(buffer->elem->in_sg, 1145 buffer->elem->in_num, 1146 0, 1147 &resp, 1148 sizeof(virtio_snd_pcm_status)); 1149 virtqueue_push(buffer->vq, 1150 buffer->elem, 1151 sizeof(virtio_snd_pcm_status)); 1152 virtio_notify(VIRTIO_DEVICE(stream->s), buffer->vq); 1153 QSIMPLEQ_REMOVE(&stream->queue, 1154 buffer, 1155 VirtIOSoundPCMBuffer, 1156 entry); 1157 virtio_snd_pcm_buffer_free(buffer); 1158 } 1159 1160 /* 1161 * AUD_* output callback. 1162 * 1163 * @data: VirtIOSoundPCMStream stream 1164 * @available: number of bytes that can be written with AUD_write() 1165 */ 1166 static void virtio_snd_pcm_out_cb(void *data, int available) 1167 { 1168 VirtIOSoundPCMStream *stream = data; 1169 VirtIOSoundPCMBuffer *buffer; 1170 size_t size; 1171 1172 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 1173 while (!QSIMPLEQ_EMPTY(&stream->queue)) { 1174 buffer = QSIMPLEQ_FIRST(&stream->queue); 1175 if (!virtio_queue_ready(buffer->vq)) { 1176 return; 1177 } 1178 if (!stream->active) { 1179 /* Stream has stopped, so do not perform AUD_write. */ 1180 return_tx_buffer(stream, buffer); 1181 continue; 1182 } 1183 if (!buffer->populated) { 1184 iov_to_buf(buffer->elem->out_sg, 1185 buffer->elem->out_num, 1186 sizeof(virtio_snd_pcm_xfer), 1187 buffer->data, 1188 buffer->size); 1189 buffer->populated = true; 1190 } 1191 for (;;) { 1192 size = AUD_write(stream->voice.out, 1193 buffer->data + buffer->offset, 1194 MIN(buffer->size, available)); 1195 assert(size <= MIN(buffer->size, available)); 1196 if (size == 0) { 1197 /* break out of both loops */ 1198 available = 0; 1199 break; 1200 } 1201 buffer->size -= size; 1202 buffer->offset += size; 1203 available -= size; 1204 if (buffer->size < 1) { 1205 return_tx_buffer(stream, buffer); 1206 break; 1207 } 1208 if (!available) { 1209 break; 1210 } 1211 } 1212 if (!available) { 1213 break; 1214 } 1215 } 1216 } 1217 } 1218 1219 /* 1220 * Flush all buffer data from this input stream's queue into the driver's 1221 * virtual queue. 1222 * 1223 * @stream: VirtIOSoundPCMStream *stream 1224 */ 1225 static inline void return_rx_buffer(VirtIOSoundPCMStream *stream, 1226 VirtIOSoundPCMBuffer *buffer) 1227 { 1228 virtio_snd_pcm_status resp = { 0 }; 1229 resp.status = cpu_to_le32(VIRTIO_SND_S_OK); 1230 resp.latency_bytes = 0; 1231 /* Copy data -if any- to guest */ 1232 iov_from_buf(buffer->elem->in_sg, 1233 buffer->elem->in_num, 1234 0, 1235 buffer->data, 1236 buffer->size); 1237 iov_from_buf(buffer->elem->in_sg, 1238 buffer->elem->in_num, 1239 buffer->size, 1240 &resp, 1241 sizeof(virtio_snd_pcm_status)); 1242 virtqueue_push(buffer->vq, 1243 buffer->elem, 1244 sizeof(virtio_snd_pcm_status) + buffer->size); 1245 virtio_notify(VIRTIO_DEVICE(stream->s), buffer->vq); 1246 QSIMPLEQ_REMOVE(&stream->queue, 1247 buffer, 1248 VirtIOSoundPCMBuffer, 1249 entry); 1250 virtio_snd_pcm_buffer_free(buffer); 1251 } 1252 1253 1254 /* 1255 * AUD_* input callback. 1256 * 1257 * @data: VirtIOSoundPCMStream stream 1258 * @available: number of bytes that can be read with AUD_read() 1259 */ 1260 static void virtio_snd_pcm_in_cb(void *data, int available) 1261 { 1262 VirtIOSoundPCMStream *stream = data; 1263 VirtIOSoundPCMBuffer *buffer; 1264 size_t size; 1265 1266 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 1267 while (!QSIMPLEQ_EMPTY(&stream->queue)) { 1268 buffer = QSIMPLEQ_FIRST(&stream->queue); 1269 if (!virtio_queue_ready(buffer->vq)) { 1270 return; 1271 } 1272 if (!stream->active) { 1273 /* Stream has stopped, so do not perform AUD_read. */ 1274 return_rx_buffer(stream, buffer); 1275 continue; 1276 } 1277 1278 for (;;) { 1279 size = AUD_read(stream->voice.in, 1280 buffer->data + buffer->size, 1281 MIN(available, (stream->params.period_bytes - 1282 buffer->size))); 1283 if (!size) { 1284 available = 0; 1285 break; 1286 } 1287 buffer->size += size; 1288 available -= size; 1289 if (buffer->size >= stream->params.period_bytes) { 1290 return_rx_buffer(stream, buffer); 1291 break; 1292 } 1293 if (!available) { 1294 break; 1295 } 1296 } 1297 if (!available) { 1298 break; 1299 } 1300 } 1301 } 1302 } 1303 1304 /* 1305 * Flush all buffer data from this output stream's queue into the driver's 1306 * virtual queue. 1307 * 1308 * @stream: VirtIOSoundPCMStream *stream 1309 */ 1310 static inline void virtio_snd_pcm_flush(VirtIOSoundPCMStream *stream) 1311 { 1312 VirtIOSoundPCMBuffer *buffer; 1313 void (*cb)(VirtIOSoundPCMStream *, VirtIOSoundPCMBuffer *) = 1314 (stream->info.direction == VIRTIO_SND_D_OUTPUT) ? return_tx_buffer : 1315 return_rx_buffer; 1316 1317 WITH_QEMU_LOCK_GUARD(&stream->queue_mutex) { 1318 while (!QSIMPLEQ_EMPTY(&stream->queue)) { 1319 buffer = QSIMPLEQ_FIRST(&stream->queue); 1320 cb(stream, buffer); 1321 } 1322 } 1323 } 1324 1325 static void virtio_snd_unrealize(DeviceState *dev) 1326 { 1327 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1328 VirtIOSound *vsnd = VIRTIO_SND(dev); 1329 VirtIOSoundPCMStream *stream; 1330 1331 qemu_del_vm_change_state_handler(vsnd->vmstate); 1332 trace_virtio_snd_unrealize(vsnd); 1333 1334 if (vsnd->pcm) { 1335 if (vsnd->pcm->streams) { 1336 for (uint32_t i = 0; i < vsnd->snd_conf.streams; i++) { 1337 stream = vsnd->pcm->streams[i]; 1338 if (stream) { 1339 virtio_snd_process_cmdq(stream->s); 1340 virtio_snd_pcm_close(stream); 1341 qemu_mutex_destroy(&stream->queue_mutex); 1342 g_free(stream); 1343 } 1344 } 1345 g_free(vsnd->pcm->streams); 1346 } 1347 g_free(vsnd->pcm->pcm_params); 1348 g_free(vsnd->pcm); 1349 vsnd->pcm = NULL; 1350 } 1351 AUD_remove_card(&vsnd->card); 1352 qemu_mutex_destroy(&vsnd->cmdq_mutex); 1353 virtio_delete_queue(vsnd->queues[VIRTIO_SND_VQ_CONTROL]); 1354 virtio_delete_queue(vsnd->queues[VIRTIO_SND_VQ_EVENT]); 1355 virtio_delete_queue(vsnd->queues[VIRTIO_SND_VQ_TX]); 1356 virtio_delete_queue(vsnd->queues[VIRTIO_SND_VQ_RX]); 1357 virtio_cleanup(vdev); 1358 } 1359 1360 1361 static void virtio_snd_reset(VirtIODevice *vdev) 1362 { 1363 VirtIOSound *vsnd = VIRTIO_SND(vdev); 1364 virtio_snd_ctrl_command *cmd; 1365 1366 /* 1367 * Sanity check that the invalid buffer message queue is emptied at the end 1368 * of every virtio_snd_handle_tx_xfer/virtio_snd_handle_rx_xfer call, and 1369 * must be empty otherwise. 1370 */ 1371 g_assert(QSIMPLEQ_EMPTY(&vsnd->invalid)); 1372 1373 WITH_QEMU_LOCK_GUARD(&vsnd->cmdq_mutex) { 1374 while (!QTAILQ_EMPTY(&vsnd->cmdq)) { 1375 cmd = QTAILQ_FIRST(&vsnd->cmdq); 1376 QTAILQ_REMOVE(&vsnd->cmdq, cmd, next); 1377 virtio_snd_ctrl_cmd_free(cmd); 1378 } 1379 } 1380 } 1381 1382 static void virtio_snd_class_init(ObjectClass *klass, void *data) 1383 { 1384 DeviceClass *dc = DEVICE_CLASS(klass); 1385 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1386 1387 1388 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 1389 device_class_set_props(dc, virtio_snd_properties); 1390 1391 dc->vmsd = &vmstate_virtio_snd; 1392 vdc->vmsd = &vmstate_virtio_snd_device; 1393 vdc->realize = virtio_snd_realize; 1394 vdc->unrealize = virtio_snd_unrealize; 1395 vdc->get_config = virtio_snd_get_config; 1396 vdc->set_config = virtio_snd_set_config; 1397 vdc->get_features = get_features; 1398 vdc->reset = virtio_snd_reset; 1399 vdc->legacy_features = 0; 1400 } 1401 1402 static const TypeInfo virtio_snd_types[] = { 1403 { 1404 .name = TYPE_VIRTIO_SND, 1405 .parent = TYPE_VIRTIO_DEVICE, 1406 .instance_size = sizeof(VirtIOSound), 1407 .class_init = virtio_snd_class_init, 1408 } 1409 }; 1410 1411 DEFINE_TYPES(virtio_snd_types) 1412