sof/ipc3-dtrace.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // Copyright(c) 2022 Intel Corporation. All rights reserved.
   4 //
   5 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
   6
   7 #include <linux/debugfs.h>
   8 #include <linux/sched/signal.h>
   9 #include "sof-priv.h"
  10 #include "sof-audio.h"
  11 #include "ops.h"
  12 #include "sof-utils.h"
  13 #include "ipc3-priv.h"
  14
  15 #define TRACE_FILTER_ELEMENTS_PER_ENTRY 4
  16 #define TRACE_FILTER_MAX_CONFIG_STRING_LENGTH 1024
  17
  18 enum sof_dtrace_state {
  19         SOF_DTRACE_DISABLED,
  20         SOF_DTRACE_STOPPED,
  21         SOF_DTRACE_INITIALIZING,
  22         SOF_DTRACE_ENABLED,
  23 };
  24
  25 struct sof_dtrace_priv {
  26         struct snd_dma_buffer dmatb;
  27         struct snd_dma_buffer dmatp;
  28         int dma_trace_pages;
  29         wait_queue_head_t trace_sleep;
  30         u32 host_offset;
  31         bool dtrace_error;
  32         bool dtrace_draining;
  33         enum sof_dtrace_state dtrace_state;
  34 };
  35
  36 static bool trace_pos_update_expected(struct sof_dtrace_priv *priv)
  37 {
  38         if (priv->dtrace_state == SOF_DTRACE_ENABLED ||
  39             priv->dtrace_state == SOF_DTRACE_INITIALIZING)
  40                 return true;
  41
  42         return false;
  43 }
  44
  45 static int trace_filter_append_elem(struct snd_sof_dev *sdev, u32 key, u32 value,
  46                                     struct sof_ipc_trace_filter_elem *elem_list,
  47                                     int capacity, int *counter)
  48 {
  49         if (*counter >= capacity)
  50                 return -ENOMEM;
  51
  52         elem_list[*counter].key = key;
  53         elem_list[*counter].value = value;
  54         ++*counter;
  55
  56         return 0;
  57 }
  58
  59 static int trace_filter_parse_entry(struct snd_sof_dev *sdev, const char *line,
  60                                     struct sof_ipc_trace_filter_elem *elem,
  61                                     int capacity, int *counter)
  62 {
  63         int log_level, pipe_id, comp_id, read, ret;
  64         int len = strlen(line);
  65         int cnt = *counter;
  66         u32 uuid_id;
  67
  68         /* ignore empty content */
  69         ret = sscanf(line, " %n", &read);
  70         if (!ret && read == len)
  71                 return len;
  72
  73         ret = sscanf(line, " %d %x %d %d %n", &log_level, &uuid_id, &pipe_id, &comp_id, &read);
  74         if (ret != TRACE_FILTER_ELEMENTS_PER_ENTRY || read != len) {
  75                 dev_err(sdev->dev, "Invalid trace filter entry '%s'\n", line);
  76                 return -EINVAL;
  77         }
  78
  79         if (uuid_id > 0) {
  80                 ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_UUID,
  81                                                uuid_id, elem, capacity, &cnt);
  82                 if (ret)
  83                         return ret;
  84         }
  85         if (pipe_id >= 0) {
  86                 ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_PIPE,
  87                                                pipe_id, elem, capacity, &cnt);
  88                 if (ret)
  89                         return ret;
  90         }
  91         if (comp_id >= 0) {
  92                 ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_COMP,
  93                                                comp_id, elem, capacity, &cnt);
  94                 if (ret)
  95                         return ret;
  96         }
  97
  98         ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_SET_LEVEL |
  99                                        SOF_IPC_TRACE_FILTER_ELEM_FIN,
 100                                        log_level, elem, capacity, &cnt);
 101         if (ret)
 102                 return ret;
 103
 104         /* update counter only when parsing whole entry passed */
 105         *counter = cnt;
 106
 107         return len;
 108 }
 109
 110 static int trace_filter_parse(struct snd_sof_dev *sdev, char *string,
 111                               int *out_elem_cnt,
 112                               struct sof_ipc_trace_filter_elem **out)
 113 {
 114         static const char entry_delimiter[] = ";";
 115         char *entry = string;
 116         int capacity = 0;
 117         int entry_len;
 118         int cnt = 0;
 119
 120         /*
 121          * Each entry contains at least 1, up to TRACE_FILTER_ELEMENTS_PER_ENTRY
 122          * IPC elements, depending on content. Calculate IPC elements capacity
 123          * for the input string where each element is set.
 124          */
 125         while (entry) {
 126                 capacity += TRACE_FILTER_ELEMENTS_PER_ENTRY;
 127                 entry = strchr(entry + 1, entry_delimiter[0]);
 128         }
 129         *out = kmalloc(capacity * sizeof(**out), GFP_KERNEL);
 130         if (!*out)
 131                 return -ENOMEM;
 132
 133         /* split input string by ';', and parse each entry separately in trace_filter_parse_entry */
 134         while ((entry = strsep(&string, entry_delimiter))) {
 135                 entry_len = trace_filter_parse_entry(sdev, entry, *out, capacity, &cnt);
 136                 if (entry_len < 0) {
 137                         dev_err(sdev->dev,
 138                                 "Parsing filter entry '%s' failed with %d\n",
 139                                 entry, entry_len);
 140                         return -EINVAL;
 141                 }
 142         }
 143
 144         *out_elem_cnt = cnt;
 145
 146         return 0;
 147 }
 148
 149 static int ipc3_trace_update_filter(struct snd_sof_dev *sdev, int num_elems,
 150                                     struct sof_ipc_trace_filter_elem *elems)
 151 {
 152         struct sof_ipc_trace_filter *msg;
 153         struct sof_ipc_reply reply;
 154         size_t size;
 155         int ret;
 156
 157         size = struct_size(msg, elems, num_elems);
 158         if (size > SOF_IPC_MSG_MAX_SIZE)
 159                 return -EINVAL;
 160
 161         msg = kmalloc(size, GFP_KERNEL);
 162         if (!msg)
 163                 return -ENOMEM;
 164
 165         msg->hdr.size = size;
 166         msg->hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_FILTER_UPDATE;
 167         msg->elem_cnt = num_elems;
 168         memcpy(&msg->elems[0], elems, num_elems * sizeof(*elems));
 169
 170         ret = pm_runtime_resume_and_get(sdev->dev);
 171         if (ret < 0 && ret != -EACCES) {
 172                 dev_err(sdev->dev, "enabling device failed: %d\n", ret);
 173                 goto error;
 174         }
 175         ret = sof_ipc_tx_message(sdev->ipc, msg, msg->hdr.size, &reply, sizeof(reply));
 176         pm_runtime_mark_last_busy(sdev->dev);
 177         pm_runtime_put_autosuspend(sdev->dev);
 178
 179 error:
 180         kfree(msg);
 181         return ret ? ret : reply.error;
 182 }
 183
 184 static ssize_t dfsentry_trace_filter_write(struct file *file, const char __user *from,
 185                                            size_t count, loff_t *ppos)
 186 {
 187         struct snd_sof_dfsentry *dfse = file->private_data;
 188         struct sof_ipc_trace_filter_elem *elems = NULL;
 189         struct snd_sof_dev *sdev = dfse->sdev;
 190         int num_elems;
 191         char *string;
 192         int ret;
 193
 194         if (count > TRACE_FILTER_MAX_CONFIG_STRING_LENGTH) {
 195                 dev_err(sdev->dev, "%s too long input, %zu > %d\n", __func__, count,
 196                         TRACE_FILTER_MAX_CONFIG_STRING_LENGTH);
 197                 return -EINVAL;
 198         }
 199
 200         string = kmalloc(count + 1, GFP_KERNEL);
 201         if (!string)
 202                 return -ENOMEM;
 203
 204         if (copy_from_user(string, from, count)) {
 205                 ret = -EFAULT;
 206                 goto error;
 207         }
 208         string[count] = '\0';
 209
 210         ret = trace_filter_parse(sdev, string, &num_elems, &elems);
 211         if (ret < 0)
 212                 goto error;
 213
 214         if (num_elems) {
 215                 ret = ipc3_trace_update_filter(sdev, num_elems, elems);
 216                 if (ret < 0) {
 217                         dev_err(sdev->dev, "Filter update failed: %d\n", ret);
 218                         goto error;
 219                 }
 220         }
 221         ret = count;
 222 error:
 223         kfree(string);
 224         kfree(elems);
 225         return ret;
 226 }
 227
 228 static const struct file_operations sof_dfs_trace_filter_fops = {
 229         .open = simple_open,
 230         .write = dfsentry_trace_filter_write,
 231         .llseek = default_llseek,
 232 };
 233
 234 static int debugfs_create_trace_filter(struct snd_sof_dev *sdev)
 235 {
 236         struct snd_sof_dfsentry *dfse;
 237
 238         dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
 239         if (!dfse)
 240                 return -ENOMEM;
 241
 242         dfse->sdev = sdev;
 243         dfse->type = SOF_DFSENTRY_TYPE_BUF;
 244
 245         debugfs_create_file("filter", 0200, sdev->debugfs_root, dfse,
 246                             &sof_dfs_trace_filter_fops);
 247         /* add to dfsentry list */
 248         list_add(&dfse->list, &sdev->dfsentry_list);
 249
 250         return 0;
 251 }
 252
 253 static bool sof_dtrace_set_host_offset(struct sof_dtrace_priv *priv, u32 new_offset)
 254 {
 255         u32 host_offset = READ_ONCE(priv->host_offset);
 256
 257         if (host_offset != new_offset) {
 258                 /* This is a bit paranoid and unlikely that it is needed */
 259                 u32 ret = cmpxchg(&priv->host_offset, host_offset, new_offset);
 260
 261                 if (ret == host_offset)
 262                         return true;
 263         }
 264
 265         return false;
 266 }
 267
 268 static size_t sof_dtrace_avail(struct snd_sof_dev *sdev,
 269                                loff_t pos, size_t buffer_size)
 270 {
 271         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 272         loff_t host_offset = READ_ONCE(priv->host_offset);
 273
 274         /*
 275          * If host offset is less than local pos, it means write pointer of
 276          * host DMA buffer has been wrapped. We should output the trace data
 277          * at the end of host DMA buffer at first.
 278          */
 279         if (host_offset < pos)
 280                 return buffer_size - pos;
 281
 282         /* If there is available trace data now, it is unnecessary to wait. */
 283         if (host_offset > pos)
 284                 return host_offset - pos;
 285
 286         return 0;
 287 }
 288
 289 static size_t sof_wait_dtrace_avail(struct snd_sof_dev *sdev, loff_t pos,
 290                                     size_t buffer_size)
 291 {
 292         size_t ret = sof_dtrace_avail(sdev, pos, buffer_size);
 293         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 294         wait_queue_entry_t wait;
 295
 296         /* data immediately available */
 297         if (ret)
 298                 return ret;
 299
 300         if (priv->dtrace_draining && !trace_pos_update_expected(priv)) {
 301                 /*
 302                  * tracing has ended and all traces have been
 303                  * read by client, return EOF
 304                  */
 305                 priv->dtrace_draining = false;
 306                 return 0;
 307         }
 308
 309         /* wait for available trace data from FW */
 310         init_waitqueue_entry(&wait, current);
 311         set_current_state(TASK_INTERRUPTIBLE);
 312         add_wait_queue(&priv->trace_sleep, &wait);
 313
 314         if (!signal_pending(current)) {
 315                 /* set timeout to max value, no error code */
 316                 schedule_timeout(MAX_SCHEDULE_TIMEOUT);
 317         }
 318         remove_wait_queue(&priv->trace_sleep, &wait);
 319
 320         return sof_dtrace_avail(sdev, pos, buffer_size);
 321 }
 322
 323 static ssize_t dfsentry_dtrace_read(struct file *file, char __user *buffer,
 324                                     size_t count, loff_t *ppos)
 325 {
 326         struct snd_sof_dfsentry *dfse = file->private_data;
 327         struct snd_sof_dev *sdev = dfse->sdev;
 328         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 329         unsigned long rem;
 330         loff_t lpos = *ppos;
 331         size_t avail, buffer_size = dfse->size;
 332         u64 lpos_64;
 333
 334         /* make sure we know about any failures on the DSP side */
 335         priv->dtrace_error = false;
 336
 337         /* check pos and count */
 338         if (lpos < 0)
 339                 return -EINVAL;
 340         if (!count)
 341                 return 0;
 342
 343         /* check for buffer wrap and count overflow */
 344         lpos_64 = lpos;
 345         lpos = do_div(lpos_64, buffer_size);
 346
 347         /* get available count based on current host offset */
 348         avail = sof_wait_dtrace_avail(sdev, lpos, buffer_size);
 349         if (priv->dtrace_error) {
 350                 dev_err(sdev->dev, "trace IO error\n");
 351                 return -EIO;
 352         }
 353
 354         /* no new trace data */
 355         if (!avail)
 356                 return 0;
 357
 358         /* make sure count is <= avail */
 359         if (count > avail)
 360                 count = avail;
 361
 362         /*
 363          * make sure that all trace data is available for the CPU as the trace
 364          * data buffer might be allocated from non consistent memory.
 365          * Note: snd_dma_buffer_sync() is called for normal audio playback and
 366          *       capture streams also.
 367          */
 368         snd_dma_buffer_sync(&priv->dmatb, SNDRV_DMA_SYNC_CPU);
 369         /* copy available trace data to debugfs */
 370         rem = copy_to_user(buffer, ((u8 *)(dfse->buf) + lpos), count);
 371         if (rem)
 372                 return -EFAULT;
 373
 374         *ppos += count;
 375
 376         /* move debugfs reading position */
 377         return count;
 378 }
 379
 380 static int dfsentry_dtrace_release(struct inode *inode, struct file *file)
 381 {
 382         struct snd_sof_dfsentry *dfse = inode->i_private;
 383         struct snd_sof_dev *sdev = dfse->sdev;
 384         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 385
 386         /* avoid duplicate traces at next open */
 387         if (priv->dtrace_state != SOF_DTRACE_ENABLED)
 388                 sof_dtrace_set_host_offset(priv, 0);
 389
 390         return 0;
 391 }
 392
 393 static const struct file_operations sof_dfs_dtrace_fops = {
 394         .open = simple_open,
 395         .read = dfsentry_dtrace_read,
 396         .llseek = default_llseek,
 397         .release = dfsentry_dtrace_release,
 398 };
 399
 400 static int debugfs_create_dtrace(struct snd_sof_dev *sdev)
 401 {
 402         struct sof_dtrace_priv *priv;
 403         struct snd_sof_dfsentry *dfse;
 404         int ret;
 405
 406         if (!sdev)
 407                 return -EINVAL;
 408
 409         priv = sdev->fw_trace_data;
 410
 411         ret = debugfs_create_trace_filter(sdev);
 412         if (ret < 0)
 413                 dev_warn(sdev->dev, "failed to create filter debugfs file: %d", ret);
 414
 415         dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
 416         if (!dfse)
 417                 return -ENOMEM;
 418
 419         dfse->type = SOF_DFSENTRY_TYPE_BUF;
 420         dfse->buf = priv->dmatb.area;
 421         dfse->size = priv->dmatb.bytes;
 422         dfse->sdev = sdev;
 423
 424         debugfs_create_file("trace", 0444, sdev->debugfs_root, dfse,
 425                             &sof_dfs_dtrace_fops);
 426
 427         return 0;
 428 }
 429
 430 static int ipc3_dtrace_enable(struct snd_sof_dev *sdev)
 431 {
 432         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 433         struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
 434         struct sof_ipc_fw_version *v = &ready->version;
 435         struct sof_ipc_dma_trace_params_ext params;
 436         struct sof_ipc_reply ipc_reply;
 437         int ret;
 438
 439         if (!sdev->fw_trace_is_supported)
 440                 return 0;
 441
 442         if (priv->dtrace_state == SOF_DTRACE_ENABLED || !priv->dma_trace_pages)
 443                 return -EINVAL;
 444
 445         if (priv->dtrace_state == SOF_DTRACE_STOPPED)
 446                 goto start;
 447
 448         /* set IPC parameters */
 449         params.hdr.cmd = SOF_IPC_GLB_TRACE_MSG;
 450         /* PARAMS_EXT is only supported from ABI 3.7.0 onwards */
 451         if (v->abi_version >= SOF_ABI_VER(3, 7, 0)) {
 452                 params.hdr.size = sizeof(struct sof_ipc_dma_trace_params_ext);
 453                 params.hdr.cmd |= SOF_IPC_TRACE_DMA_PARAMS_EXT;
 454                 params.timestamp_ns = ktime_get(); /* in nanosecond */
 455         } else {
 456                 params.hdr.size = sizeof(struct sof_ipc_dma_trace_params);
 457                 params.hdr.cmd |= SOF_IPC_TRACE_DMA_PARAMS;
 458         }
 459         params.buffer.phy_addr = priv->dmatp.addr;
 460         params.buffer.size = priv->dmatb.bytes;
 461         params.buffer.pages = priv->dma_trace_pages;
 462         params.stream_tag = 0;
 463
 464         sof_dtrace_set_host_offset(priv, 0);
 465         priv->dtrace_draining = false;
 466
 467         ret = sof_dtrace_host_init(sdev, &priv->dmatb, &params);
 468         if (ret < 0) {
 469                 dev_err(sdev->dev, "Host dtrace init failed: %d\n", ret);
 470                 return ret;
 471         }
 472         dev_dbg(sdev->dev, "stream_tag: %d\n", params.stream_tag);
 473
 474         /* send IPC to the DSP */
 475         priv->dtrace_state = SOF_DTRACE_INITIALIZING;
 476         ret = sof_ipc_tx_message(sdev->ipc, &params, sizeof(params), &ipc_reply, sizeof(ipc_reply));
 477         if (ret < 0) {
 478                 dev_err(sdev->dev, "can't set params for DMA for trace %d\n", ret);
 479                 goto trace_release;
 480         }
 481
 482 start:
 483         priv->dtrace_state = SOF_DTRACE_ENABLED;
 484
 485         ret = sof_dtrace_host_trigger(sdev, SNDRV_PCM_TRIGGER_START);
 486         if (ret < 0) {
 487                 dev_err(sdev->dev, "Host dtrace trigger start failed: %d\n", ret);
 488                 goto trace_release;
 489         }
 490
 491         return 0;
 492
 493 trace_release:
 494         priv->dtrace_state = SOF_DTRACE_DISABLED;
 495         sof_dtrace_host_release(sdev);
 496         return ret;
 497 }
 498
 499 static int ipc3_dtrace_init(struct snd_sof_dev *sdev)
 500 {
 501         struct sof_dtrace_priv *priv;
 502         int ret;
 503
 504         /* dtrace is only supported with SOF_IPC */
 505         if (sdev->pdata->ipc_type != SOF_IPC)
 506                 return -EOPNOTSUPP;
 507
 508         if (sdev->fw_trace_data) {
 509                 dev_err(sdev->dev, "fw_trace_data has been already allocated\n");
 510                 return -EBUSY;
 511         }
 512
 513         priv = devm_kzalloc(sdev->dev, sizeof(*priv), GFP_KERNEL);
 514         if (!priv)
 515                 return -ENOMEM;
 516
 517         sdev->fw_trace_data = priv;
 518
 519         /* set false before start initialization */
 520         priv->dtrace_state = SOF_DTRACE_DISABLED;
 521
 522         /* allocate trace page table buffer */
 523         ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, sdev->dev,
 524                                   PAGE_SIZE, &priv->dmatp);
 525         if (ret < 0) {
 526                 dev_err(sdev->dev, "can't alloc page table for trace %d\n", ret);
 527                 return ret;
 528         }
 529
 530         /* allocate trace data buffer */
 531         ret = snd_dma_alloc_dir_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 532                                       DMA_FROM_DEVICE, DMA_BUF_SIZE_FOR_TRACE,
 533                                       &priv->dmatb);
 534         if (ret < 0) {
 535                 dev_err(sdev->dev, "can't alloc buffer for trace %d\n", ret);
 536                 goto page_err;
 537         }
 538
 539         /* create compressed page table for audio firmware */
 540         ret = snd_sof_create_page_table(sdev->dev, &priv->dmatb,
 541                                         priv->dmatp.area, priv->dmatb.bytes);
 542         if (ret < 0)
 543                 goto table_err;
 544
 545         priv->dma_trace_pages = ret;
 546         dev_dbg(sdev->dev, "dma_trace_pages: %d\n", priv->dma_trace_pages);
 547
 548         if (sdev->first_boot) {
 549                 ret = debugfs_create_dtrace(sdev);
 550                 if (ret < 0)
 551                         goto table_err;
 552         }
 553
 554         init_waitqueue_head(&priv->trace_sleep);
 555
 556         ret = ipc3_dtrace_enable(sdev);
 557         if (ret < 0)
 558                 goto table_err;
 559
 560         return 0;
 561 table_err:
 562         priv->dma_trace_pages = 0;
 563         snd_dma_free_pages(&priv->dmatb);
 564 page_err:
 565         snd_dma_free_pages(&priv->dmatp);
 566         return ret;
 567 }
 568
 569 int ipc3_dtrace_posn_update(struct snd_sof_dev *sdev,
 570                             struct sof_ipc_dma_trace_posn *posn)
 571 {
 572         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 573
 574         if (!sdev->fw_trace_is_supported)
 575                 return 0;
 576
 577         if (trace_pos_update_expected(priv) &&
 578             sof_dtrace_set_host_offset(priv, posn->host_offset))
 579                 wake_up(&priv->trace_sleep);
 580
 581         if (posn->overflow != 0)
 582                 dev_err(sdev->dev,
 583                         "DSP trace buffer overflow %u bytes. Total messages %d\n",
 584                         posn->overflow, posn->messages);
 585
 586         return 0;
 587 }
 588
 589 /* an error has occurred within the DSP that prevents further trace */
 590 static void ipc3_dtrace_fw_crashed(struct snd_sof_dev *sdev)
 591 {
 592         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 593
 594         if (priv->dtrace_state == SOF_DTRACE_ENABLED) {
 595                 priv->dtrace_error = true;
 596                 wake_up(&priv->trace_sleep);
 597         }
 598 }
 599
 600 static void ipc3_dtrace_release(struct snd_sof_dev *sdev, bool only_stop)
 601 {
 602         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 603         struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
 604         struct sof_ipc_fw_version *v = &ready->version;
 605         struct sof_ipc_cmd_hdr hdr;
 606         struct sof_ipc_reply ipc_reply;
 607         int ret;
 608
 609         if (!sdev->fw_trace_is_supported || priv->dtrace_state == SOF_DTRACE_DISABLED)
 610                 return;
 611
 612         ret = sof_dtrace_host_trigger(sdev, SNDRV_PCM_TRIGGER_STOP);
 613         if (ret < 0)
 614                 dev_err(sdev->dev, "Host dtrace trigger stop failed: %d\n", ret);
 615         priv->dtrace_state = SOF_DTRACE_STOPPED;
 616
 617         /*
 618          * stop and free trace DMA in the DSP. TRACE_DMA_FREE is only supported from
 619          * ABI 3.20.0 onwards
 620          */
 621         if (v->abi_version >= SOF_ABI_VER(3, 20, 0)) {
 622                 hdr.size = sizeof(hdr);
 623                 hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_DMA_FREE;
 624
 625                 ret = sof_ipc_tx_message(sdev->ipc, &hdr, hdr.size,
 626                                          &ipc_reply, sizeof(ipc_reply));
 627                 if (ret < 0)
 628                         dev_err(sdev->dev, "DMA_TRACE_FREE failed with error: %d\n", ret);
 629         }
 630
 631         if (only_stop)
 632                 goto out;
 633
 634         ret = sof_dtrace_host_release(sdev);
 635         if (ret < 0)
 636                 dev_err(sdev->dev, "Host dtrace release failed %d\n", ret);
 637
 638         priv->dtrace_state = SOF_DTRACE_DISABLED;
 639
 640 out:
 641         priv->dtrace_draining = true;
 642         wake_up(&priv->trace_sleep);
 643 }
 644
 645 static void ipc3_dtrace_suspend(struct snd_sof_dev *sdev, pm_message_t pm_state)
 646 {
 647         ipc3_dtrace_release(sdev, pm_state.event == SOF_DSP_PM_D0);
 648 }
 649
 650 static int ipc3_dtrace_resume(struct snd_sof_dev *sdev)
 651 {
 652         return ipc3_dtrace_enable(sdev);
 653 }
 654
 655 static void ipc3_dtrace_free(struct snd_sof_dev *sdev)
 656 {
 657         struct sof_dtrace_priv *priv = sdev->fw_trace_data;
 658
 659         /* release trace */
 660         ipc3_dtrace_release(sdev, false);
 661
 662         if (priv->dma_trace_pages) {
 663                 snd_dma_free_pages(&priv->dmatb);
 664                 snd_dma_free_pages(&priv->dmatp);
 665                 priv->dma_trace_pages = 0;
 666         }
 667 }
 668
 669 const struct sof_ipc_fw_tracing_ops ipc3_dtrace_ops = {
 670         .init = ipc3_dtrace_init,
 671         .free = ipc3_dtrace_free,
 672         .fw_crashed = ipc3_dtrace_fw_crashed,
 673         .suspend = ipc3_dtrace_suspend,
 674         .resume = ipc3_dtrace_resume,
 675 };