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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Pierre-Louis Bossart](/assets/img/avatar_default.png)
The module and function information can be added with 'modprobe foo dyndbg=+pmf' Suggested-by: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20220616215351.135643-7-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
676 lines
17 KiB
C
676 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// Copyright(c) 2022 Intel Corporation. All rights reserved.
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//
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// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
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#include <linux/debugfs.h>
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#include <linux/sched/signal.h>
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#include "sof-priv.h"
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#include "sof-audio.h"
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#include "ops.h"
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#include "sof-utils.h"
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#include "ipc3-priv.h"
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#define TRACE_FILTER_ELEMENTS_PER_ENTRY 4
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#define TRACE_FILTER_MAX_CONFIG_STRING_LENGTH 1024
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enum sof_dtrace_state {
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SOF_DTRACE_DISABLED,
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SOF_DTRACE_STOPPED,
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SOF_DTRACE_INITIALIZING,
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SOF_DTRACE_ENABLED,
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};
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struct sof_dtrace_priv {
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struct snd_dma_buffer dmatb;
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struct snd_dma_buffer dmatp;
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int dma_trace_pages;
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wait_queue_head_t trace_sleep;
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u32 host_offset;
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bool dtrace_error;
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bool dtrace_draining;
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enum sof_dtrace_state dtrace_state;
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};
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static bool trace_pos_update_expected(struct sof_dtrace_priv *priv)
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{
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if (priv->dtrace_state == SOF_DTRACE_ENABLED ||
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priv->dtrace_state == SOF_DTRACE_INITIALIZING)
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return true;
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return false;
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}
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static int trace_filter_append_elem(struct snd_sof_dev *sdev, u32 key, u32 value,
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struct sof_ipc_trace_filter_elem *elem_list,
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int capacity, int *counter)
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{
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if (*counter >= capacity)
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return -ENOMEM;
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elem_list[*counter].key = key;
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elem_list[*counter].value = value;
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++*counter;
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return 0;
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}
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static int trace_filter_parse_entry(struct snd_sof_dev *sdev, const char *line,
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struct sof_ipc_trace_filter_elem *elem,
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int capacity, int *counter)
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{
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int log_level, pipe_id, comp_id, read, ret;
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int len = strlen(line);
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int cnt = *counter;
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u32 uuid_id;
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/* ignore empty content */
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ret = sscanf(line, " %n", &read);
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if (!ret && read == len)
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return len;
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ret = sscanf(line, " %d %x %d %d %n", &log_level, &uuid_id, &pipe_id, &comp_id, &read);
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if (ret != TRACE_FILTER_ELEMENTS_PER_ENTRY || read != len) {
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dev_err(sdev->dev, "Invalid trace filter entry '%s'\n", line);
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return -EINVAL;
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}
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if (uuid_id > 0) {
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ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_UUID,
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uuid_id, elem, capacity, &cnt);
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if (ret)
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return ret;
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}
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if (pipe_id >= 0) {
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ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_PIPE,
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pipe_id, elem, capacity, &cnt);
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if (ret)
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return ret;
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}
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if (comp_id >= 0) {
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ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_COMP,
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comp_id, elem, capacity, &cnt);
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if (ret)
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return ret;
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}
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ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_SET_LEVEL |
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SOF_IPC_TRACE_FILTER_ELEM_FIN,
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log_level, elem, capacity, &cnt);
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if (ret)
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return ret;
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/* update counter only when parsing whole entry passed */
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*counter = cnt;
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return len;
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}
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static int trace_filter_parse(struct snd_sof_dev *sdev, char *string,
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int *out_elem_cnt,
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struct sof_ipc_trace_filter_elem **out)
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{
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static const char entry_delimiter[] = ";";
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char *entry = string;
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int capacity = 0;
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int entry_len;
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int cnt = 0;
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/*
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* Each entry contains at least 1, up to TRACE_FILTER_ELEMENTS_PER_ENTRY
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* IPC elements, depending on content. Calculate IPC elements capacity
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* for the input string where each element is set.
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*/
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while (entry) {
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capacity += TRACE_FILTER_ELEMENTS_PER_ENTRY;
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entry = strchr(entry + 1, entry_delimiter[0]);
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}
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*out = kmalloc(capacity * sizeof(**out), GFP_KERNEL);
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if (!*out)
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return -ENOMEM;
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/* split input string by ';', and parse each entry separately in trace_filter_parse_entry */
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while ((entry = strsep(&string, entry_delimiter))) {
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entry_len = trace_filter_parse_entry(sdev, entry, *out, capacity, &cnt);
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if (entry_len < 0) {
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dev_err(sdev->dev,
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"Parsing filter entry '%s' failed with %d\n",
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entry, entry_len);
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return -EINVAL;
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}
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}
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*out_elem_cnt = cnt;
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return 0;
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}
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static int ipc3_trace_update_filter(struct snd_sof_dev *sdev, int num_elems,
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struct sof_ipc_trace_filter_elem *elems)
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{
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struct sof_ipc_trace_filter *msg;
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struct sof_ipc_reply reply;
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size_t size;
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int ret;
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size = struct_size(msg, elems, num_elems);
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if (size > SOF_IPC_MSG_MAX_SIZE)
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return -EINVAL;
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msg = kmalloc(size, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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msg->hdr.size = size;
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msg->hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_FILTER_UPDATE;
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msg->elem_cnt = num_elems;
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memcpy(&msg->elems[0], elems, num_elems * sizeof(*elems));
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ret = pm_runtime_resume_and_get(sdev->dev);
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if (ret < 0 && ret != -EACCES) {
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dev_err(sdev->dev, "enabling device failed: %d\n", ret);
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goto error;
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}
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ret = sof_ipc_tx_message(sdev->ipc, msg, msg->hdr.size, &reply, sizeof(reply));
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pm_runtime_mark_last_busy(sdev->dev);
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pm_runtime_put_autosuspend(sdev->dev);
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error:
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kfree(msg);
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return ret ? ret : reply.error;
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}
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static ssize_t dfsentry_trace_filter_write(struct file *file, const char __user *from,
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size_t count, loff_t *ppos)
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{
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struct snd_sof_dfsentry *dfse = file->private_data;
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struct sof_ipc_trace_filter_elem *elems = NULL;
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struct snd_sof_dev *sdev = dfse->sdev;
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loff_t pos = 0;
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int num_elems;
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char *string;
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int ret;
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if (count > TRACE_FILTER_MAX_CONFIG_STRING_LENGTH) {
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dev_err(sdev->dev, "%s too long input, %zu > %d\n", __func__, count,
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TRACE_FILTER_MAX_CONFIG_STRING_LENGTH);
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return -EINVAL;
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}
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string = kmalloc(count + 1, GFP_KERNEL);
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if (!string)
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return -ENOMEM;
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/* assert null termination */
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string[count] = 0;
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ret = simple_write_to_buffer(string, count, &pos, from, count);
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if (ret < 0)
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goto error;
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ret = trace_filter_parse(sdev, string, &num_elems, &elems);
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if (ret < 0)
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goto error;
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if (num_elems) {
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ret = ipc3_trace_update_filter(sdev, num_elems, elems);
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if (ret < 0) {
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dev_err(sdev->dev, "Filter update failed: %d\n", ret);
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goto error;
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}
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}
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ret = count;
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error:
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kfree(string);
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kfree(elems);
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return ret;
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}
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static const struct file_operations sof_dfs_trace_filter_fops = {
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.open = simple_open,
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.write = dfsentry_trace_filter_write,
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.llseek = default_llseek,
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};
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static int debugfs_create_trace_filter(struct snd_sof_dev *sdev)
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{
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struct snd_sof_dfsentry *dfse;
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dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
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if (!dfse)
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return -ENOMEM;
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dfse->sdev = sdev;
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dfse->type = SOF_DFSENTRY_TYPE_BUF;
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debugfs_create_file("filter", 0200, sdev->debugfs_root, dfse,
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&sof_dfs_trace_filter_fops);
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/* add to dfsentry list */
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list_add(&dfse->list, &sdev->dfsentry_list);
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return 0;
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}
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static bool sof_dtrace_set_host_offset(struct sof_dtrace_priv *priv, u32 new_offset)
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{
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u32 host_offset = READ_ONCE(priv->host_offset);
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if (host_offset != new_offset) {
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/* This is a bit paranoid and unlikely that it is needed */
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u32 ret = cmpxchg(&priv->host_offset, host_offset, new_offset);
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if (ret == host_offset)
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return true;
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}
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return false;
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}
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static size_t sof_dtrace_avail(struct snd_sof_dev *sdev,
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loff_t pos, size_t buffer_size)
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{
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struct sof_dtrace_priv *priv = sdev->fw_trace_data;
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loff_t host_offset = READ_ONCE(priv->host_offset);
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/*
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* If host offset is less than local pos, it means write pointer of
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* host DMA buffer has been wrapped. We should output the trace data
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* at the end of host DMA buffer at first.
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*/
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if (host_offset < pos)
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return buffer_size - pos;
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/* If there is available trace data now, it is unnecessary to wait. */
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if (host_offset > pos)
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return host_offset - pos;
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return 0;
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}
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static size_t sof_wait_dtrace_avail(struct snd_sof_dev *sdev, loff_t pos,
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size_t buffer_size)
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{
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size_t ret = sof_dtrace_avail(sdev, pos, buffer_size);
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struct sof_dtrace_priv *priv = sdev->fw_trace_data;
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wait_queue_entry_t wait;
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/* data immediately available */
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if (ret)
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return ret;
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if (priv->dtrace_draining && !trace_pos_update_expected(priv)) {
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/*
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* tracing has ended and all traces have been
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* read by client, return EOF
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*/
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priv->dtrace_draining = false;
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return 0;
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}
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/* wait for available trace data from FW */
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init_waitqueue_entry(&wait, current);
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set_current_state(TASK_INTERRUPTIBLE);
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add_wait_queue(&priv->trace_sleep, &wait);
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if (!signal_pending(current)) {
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/* set timeout to max value, no error code */
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schedule_timeout(MAX_SCHEDULE_TIMEOUT);
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}
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remove_wait_queue(&priv->trace_sleep, &wait);
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return sof_dtrace_avail(sdev, pos, buffer_size);
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}
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static ssize_t dfsentry_dtrace_read(struct file *file, char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct snd_sof_dfsentry *dfse = file->private_data;
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struct snd_sof_dev *sdev = dfse->sdev;
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struct sof_dtrace_priv *priv = sdev->fw_trace_data;
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unsigned long rem;
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loff_t lpos = *ppos;
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size_t avail, buffer_size = dfse->size;
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u64 lpos_64;
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/* make sure we know about any failures on the DSP side */
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priv->dtrace_error = false;
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/* check pos and count */
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if (lpos < 0)
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return -EINVAL;
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if (!count)
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return 0;
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/* check for buffer wrap and count overflow */
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lpos_64 = lpos;
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lpos = do_div(lpos_64, buffer_size);
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/* get available count based on current host offset */
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avail = sof_wait_dtrace_avail(sdev, lpos, buffer_size);
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if (priv->dtrace_error) {
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dev_err(sdev->dev, "trace IO error\n");
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return -EIO;
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}
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/* no new trace data */
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if (!avail)
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return 0;
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/* make sure count is <= avail */
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if (count > avail)
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count = avail;
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/*
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* make sure that all trace data is available for the CPU as the trace
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* data buffer might be allocated from non consistent memory.
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* Note: snd_dma_buffer_sync() is called for normal audio playback and
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* capture streams also.
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*/
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snd_dma_buffer_sync(&priv->dmatb, SNDRV_DMA_SYNC_CPU);
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/* copy available trace data to debugfs */
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rem = copy_to_user(buffer, ((u8 *)(dfse->buf) + lpos), count);
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if (rem)
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return -EFAULT;
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*ppos += count;
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/* move debugfs reading position */
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return count;
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}
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static int dfsentry_dtrace_release(struct inode *inode, struct file *file)
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{
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struct snd_sof_dfsentry *dfse = inode->i_private;
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struct snd_sof_dev *sdev = dfse->sdev;
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struct sof_dtrace_priv *priv = sdev->fw_trace_data;
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/* avoid duplicate traces at next open */
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if (priv->dtrace_state != SOF_DTRACE_ENABLED)
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sof_dtrace_set_host_offset(priv, 0);
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return 0;
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}
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static const struct file_operations sof_dfs_dtrace_fops = {
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.open = simple_open,
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.read = dfsentry_dtrace_read,
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.llseek = default_llseek,
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.release = dfsentry_dtrace_release,
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};
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static int debugfs_create_dtrace(struct snd_sof_dev *sdev)
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{
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struct sof_dtrace_priv *priv;
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struct snd_sof_dfsentry *dfse;
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int ret;
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if (!sdev)
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return -EINVAL;
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priv = sdev->fw_trace_data;
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ret = debugfs_create_trace_filter(sdev);
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if (ret < 0)
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dev_warn(sdev->dev, "failed to create filter debugfs file: %d", ret);
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dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
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if (!dfse)
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return -ENOMEM;
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dfse->type = SOF_DFSENTRY_TYPE_BUF;
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dfse->buf = priv->dmatb.area;
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dfse->size = priv->dmatb.bytes;
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dfse->sdev = sdev;
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debugfs_create_file("trace", 0444, sdev->debugfs_root, dfse,
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&sof_dfs_dtrace_fops);
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return 0;
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}
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static int ipc3_dtrace_enable(struct snd_sof_dev *sdev)
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{
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struct sof_dtrace_priv *priv = sdev->fw_trace_data;
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struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
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struct sof_ipc_fw_version *v = &ready->version;
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struct sof_ipc_dma_trace_params_ext params;
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struct sof_ipc_reply ipc_reply;
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int ret;
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if (!sdev->fw_trace_is_supported)
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return 0;
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if (priv->dtrace_state == SOF_DTRACE_ENABLED || !priv->dma_trace_pages)
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return -EINVAL;
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if (priv->dtrace_state == SOF_DTRACE_STOPPED)
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goto start;
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/* set IPC parameters */
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params.hdr.cmd = SOF_IPC_GLB_TRACE_MSG;
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/* PARAMS_EXT is only supported from ABI 3.7.0 onwards */
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if (v->abi_version >= SOF_ABI_VER(3, 7, 0)) {
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params.hdr.size = sizeof(struct sof_ipc_dma_trace_params_ext);
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params.hdr.cmd |= SOF_IPC_TRACE_DMA_PARAMS_EXT;
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params.timestamp_ns = ktime_get(); /* in nanosecond */
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} else {
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params.hdr.size = sizeof(struct sof_ipc_dma_trace_params);
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params.hdr.cmd |= SOF_IPC_TRACE_DMA_PARAMS;
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}
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params.buffer.phy_addr = priv->dmatp.addr;
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params.buffer.size = priv->dmatb.bytes;
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params.buffer.pages = priv->dma_trace_pages;
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params.stream_tag = 0;
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sof_dtrace_set_host_offset(priv, 0);
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priv->dtrace_draining = false;
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ret = sof_dtrace_host_init(sdev, &priv->dmatb, ¶ms);
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if (ret < 0) {
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dev_err(sdev->dev, "Host dtrace init failed: %d\n", ret);
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return ret;
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}
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dev_dbg(sdev->dev, "stream_tag: %d\n", params.stream_tag);
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/* send IPC to the DSP */
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priv->dtrace_state = SOF_DTRACE_INITIALIZING;
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ret = sof_ipc_tx_message(sdev->ipc, ¶ms, sizeof(params), &ipc_reply, sizeof(ipc_reply));
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if (ret < 0) {
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dev_err(sdev->dev, "can't set params for DMA for trace %d\n", ret);
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goto trace_release;
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}
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start:
|
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priv->dtrace_state = SOF_DTRACE_ENABLED;
|
|
|
|
ret = sof_dtrace_host_trigger(sdev, SNDRV_PCM_TRIGGER_START);
|
|
if (ret < 0) {
|
|
dev_err(sdev->dev, "Host dtrace trigger start failed: %d\n", ret);
|
|
goto trace_release;
|
|
}
|
|
|
|
return 0;
|
|
|
|
trace_release:
|
|
priv->dtrace_state = SOF_DTRACE_DISABLED;
|
|
sof_dtrace_host_release(sdev);
|
|
return ret;
|
|
}
|
|
|
|
static int ipc3_dtrace_init(struct snd_sof_dev *sdev)
|
|
{
|
|
struct sof_dtrace_priv *priv;
|
|
int ret;
|
|
|
|
/* dtrace is only supported with SOF_IPC */
|
|
if (sdev->pdata->ipc_type != SOF_IPC)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (sdev->fw_trace_data) {
|
|
dev_err(sdev->dev, "fw_trace_data has been already allocated\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
priv = devm_kzalloc(sdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
sdev->fw_trace_data = priv;
|
|
|
|
/* set false before start initialization */
|
|
priv->dtrace_state = SOF_DTRACE_DISABLED;
|
|
|
|
/* allocate trace page table buffer */
|
|
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, sdev->dev,
|
|
PAGE_SIZE, &priv->dmatp);
|
|
if (ret < 0) {
|
|
dev_err(sdev->dev, "can't alloc page table for trace %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* allocate trace data buffer */
|
|
ret = snd_dma_alloc_dir_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
|
|
DMA_FROM_DEVICE, DMA_BUF_SIZE_FOR_TRACE,
|
|
&priv->dmatb);
|
|
if (ret < 0) {
|
|
dev_err(sdev->dev, "can't alloc buffer for trace %d\n", ret);
|
|
goto page_err;
|
|
}
|
|
|
|
/* create compressed page table for audio firmware */
|
|
ret = snd_sof_create_page_table(sdev->dev, &priv->dmatb,
|
|
priv->dmatp.area, priv->dmatb.bytes);
|
|
if (ret < 0)
|
|
goto table_err;
|
|
|
|
priv->dma_trace_pages = ret;
|
|
dev_dbg(sdev->dev, "dma_trace_pages: %d\n", priv->dma_trace_pages);
|
|
|
|
if (sdev->first_boot) {
|
|
ret = debugfs_create_dtrace(sdev);
|
|
if (ret < 0)
|
|
goto table_err;
|
|
}
|
|
|
|
init_waitqueue_head(&priv->trace_sleep);
|
|
|
|
ret = ipc3_dtrace_enable(sdev);
|
|
if (ret < 0)
|
|
goto table_err;
|
|
|
|
return 0;
|
|
table_err:
|
|
priv->dma_trace_pages = 0;
|
|
snd_dma_free_pages(&priv->dmatb);
|
|
page_err:
|
|
snd_dma_free_pages(&priv->dmatp);
|
|
return ret;
|
|
}
|
|
|
|
int ipc3_dtrace_posn_update(struct snd_sof_dev *sdev,
|
|
struct sof_ipc_dma_trace_posn *posn)
|
|
{
|
|
struct sof_dtrace_priv *priv = sdev->fw_trace_data;
|
|
|
|
if (!sdev->fw_trace_is_supported)
|
|
return 0;
|
|
|
|
if (trace_pos_update_expected(priv) &&
|
|
sof_dtrace_set_host_offset(priv, posn->host_offset))
|
|
wake_up(&priv->trace_sleep);
|
|
|
|
if (posn->overflow != 0)
|
|
dev_err(sdev->dev,
|
|
"DSP trace buffer overflow %u bytes. Total messages %d\n",
|
|
posn->overflow, posn->messages);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* an error has occurred within the DSP that prevents further trace */
|
|
static void ipc3_dtrace_fw_crashed(struct snd_sof_dev *sdev)
|
|
{
|
|
struct sof_dtrace_priv *priv = sdev->fw_trace_data;
|
|
|
|
if (priv->dtrace_state == SOF_DTRACE_ENABLED) {
|
|
priv->dtrace_error = true;
|
|
wake_up(&priv->trace_sleep);
|
|
}
|
|
}
|
|
|
|
static void ipc3_dtrace_release(struct snd_sof_dev *sdev, bool only_stop)
|
|
{
|
|
struct sof_dtrace_priv *priv = sdev->fw_trace_data;
|
|
struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
|
|
struct sof_ipc_fw_version *v = &ready->version;
|
|
struct sof_ipc_cmd_hdr hdr;
|
|
struct sof_ipc_reply ipc_reply;
|
|
int ret;
|
|
|
|
if (!sdev->fw_trace_is_supported || priv->dtrace_state == SOF_DTRACE_DISABLED)
|
|
return;
|
|
|
|
ret = sof_dtrace_host_trigger(sdev, SNDRV_PCM_TRIGGER_STOP);
|
|
if (ret < 0)
|
|
dev_err(sdev->dev, "Host dtrace trigger stop failed: %d\n", ret);
|
|
priv->dtrace_state = SOF_DTRACE_STOPPED;
|
|
|
|
/*
|
|
* stop and free trace DMA in the DSP. TRACE_DMA_FREE is only supported from
|
|
* ABI 3.20.0 onwards
|
|
*/
|
|
if (v->abi_version >= SOF_ABI_VER(3, 20, 0)) {
|
|
hdr.size = sizeof(hdr);
|
|
hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_DMA_FREE;
|
|
|
|
ret = sof_ipc_tx_message(sdev->ipc, &hdr, hdr.size,
|
|
&ipc_reply, sizeof(ipc_reply));
|
|
if (ret < 0)
|
|
dev_err(sdev->dev, "DMA_TRACE_FREE failed with error: %d\n", ret);
|
|
}
|
|
|
|
if (only_stop)
|
|
goto out;
|
|
|
|
ret = sof_dtrace_host_release(sdev);
|
|
if (ret < 0)
|
|
dev_err(sdev->dev, "Host dtrace release failed %d\n", ret);
|
|
|
|
priv->dtrace_state = SOF_DTRACE_DISABLED;
|
|
|
|
out:
|
|
priv->dtrace_draining = true;
|
|
wake_up(&priv->trace_sleep);
|
|
}
|
|
|
|
static void ipc3_dtrace_suspend(struct snd_sof_dev *sdev, pm_message_t pm_state)
|
|
{
|
|
ipc3_dtrace_release(sdev, pm_state.event == SOF_DSP_PM_D0);
|
|
}
|
|
|
|
static int ipc3_dtrace_resume(struct snd_sof_dev *sdev)
|
|
{
|
|
return ipc3_dtrace_enable(sdev);
|
|
}
|
|
|
|
static void ipc3_dtrace_free(struct snd_sof_dev *sdev)
|
|
{
|
|
struct sof_dtrace_priv *priv = sdev->fw_trace_data;
|
|
|
|
/* release trace */
|
|
ipc3_dtrace_release(sdev, false);
|
|
|
|
if (priv->dma_trace_pages) {
|
|
snd_dma_free_pages(&priv->dmatb);
|
|
snd_dma_free_pages(&priv->dmatp);
|
|
priv->dma_trace_pages = 0;
|
|
}
|
|
}
|
|
|
|
const struct sof_ipc_fw_tracing_ops ipc3_dtrace_ops = {
|
|
.init = ipc3_dtrace_init,
|
|
.free = ipc3_dtrace_free,
|
|
.fw_crashed = ipc3_dtrace_fw_crashed,
|
|
.suspend = ipc3_dtrace_suspend,
|
|
.resume = ipc3_dtrace_resume,
|
|
};
|