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97f53046d7
When reading from IPC flood debugfs entries no need to check whether .cache_buf is NULL - it's impossible since otherwise the initialisation would have failed. This also fixes a klocwork reported issue: passed to function and may be dereferenced there by passing argument 2 to function 'memcpy' at line 510. sound/soc/sof/debug.c:510 | sof_dfsentry_read() Reported-by: Keqiao Zhang <keqiao.zhang@intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Reviewed-by: Xiuli Pan <xiulipan@outlook.com> Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20210315163932.18663-4-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
826 lines
20 KiB
C
826 lines
20 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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//
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// This file is provided under a dual BSD/GPLv2 license. When using or
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// redistributing this file, you may do so under either license.
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//
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// Copyright(c) 2018 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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//
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// Generic debug routines used to export DSP MMIO and memories to userspace
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// for firmware debugging.
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//
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#include <linux/debugfs.h>
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#include <linux/io.h>
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#include <linux/pm_runtime.h>
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#include <sound/sof/ext_manifest.h>
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#include <sound/sof/debug.h>
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#include "sof-priv.h"
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#include "ops.h"
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES)
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#include "probe.h"
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/**
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* strsplit_u32 - Split string into sequence of u32 tokens
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* @buf: String to split into tokens.
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* @delim: String containing delimiter characters.
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* @tkns: Returned u32 sequence pointer.
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* @num_tkns: Returned number of tokens obtained.
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*/
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static int
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strsplit_u32(char **buf, const char *delim, u32 **tkns, size_t *num_tkns)
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{
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char *s;
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u32 *data, *tmp;
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size_t count = 0;
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size_t cap = 32;
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int ret = 0;
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*tkns = NULL;
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*num_tkns = 0;
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data = kcalloc(cap, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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while ((s = strsep(buf, delim)) != NULL) {
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ret = kstrtouint(s, 0, data + count);
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if (ret)
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goto exit;
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if (++count >= cap) {
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cap *= 2;
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tmp = krealloc(data, cap * sizeof(*data), GFP_KERNEL);
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if (!tmp) {
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ret = -ENOMEM;
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goto exit;
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}
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data = tmp;
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}
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}
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if (!count)
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goto exit;
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*tkns = kmemdup(data, count * sizeof(*data), GFP_KERNEL);
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if (*tkns == NULL) {
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ret = -ENOMEM;
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goto exit;
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}
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*num_tkns = count;
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exit:
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kfree(data);
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return ret;
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}
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static int tokenize_input(const char __user *from, size_t count,
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loff_t *ppos, u32 **tkns, size_t *num_tkns)
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{
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char *buf;
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int ret;
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buf = kmalloc(count + 1, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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ret = simple_write_to_buffer(buf, count, ppos, from, count);
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if (ret != count) {
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ret = ret >= 0 ? -EIO : ret;
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goto exit;
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}
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buf[count] = '\0';
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ret = strsplit_u32((char **)&buf, ",", tkns, num_tkns);
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exit:
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kfree(buf);
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return ret;
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}
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static ssize_t probe_points_read(struct file *file,
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char __user *to, 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_probe_point_desc *desc;
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size_t num_desc, len = 0;
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char *buf;
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int i, ret;
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if (sdev->extractor_stream_tag == SOF_PROBE_INVALID_NODE_ID) {
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dev_warn(sdev->dev, "no extractor stream running\n");
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return -ENOENT;
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}
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buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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ret = sof_ipc_probe_points_info(sdev, &desc, &num_desc);
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if (ret < 0)
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goto exit;
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for (i = 0; i < num_desc; i++) {
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ret = snprintf(buf + len, PAGE_SIZE - len,
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"Id: %#010x Purpose: %d Node id: %#x\n",
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desc[i].buffer_id, desc[i].purpose, desc[i].stream_tag);
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if (ret < 0)
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goto free_desc;
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len += ret;
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}
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ret = simple_read_from_buffer(to, count, ppos, buf, len);
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free_desc:
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kfree(desc);
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exit:
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kfree(buf);
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return ret;
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}
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static ssize_t probe_points_write(struct file *file,
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const char __user *from, 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_probe_point_desc *desc;
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size_t num_tkns, bytes;
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u32 *tkns;
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int ret;
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if (sdev->extractor_stream_tag == SOF_PROBE_INVALID_NODE_ID) {
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dev_warn(sdev->dev, "no extractor stream running\n");
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return -ENOENT;
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}
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ret = tokenize_input(from, count, ppos, &tkns, &num_tkns);
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if (ret < 0)
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return ret;
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bytes = sizeof(*tkns) * num_tkns;
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if (!num_tkns || (bytes % sizeof(*desc))) {
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ret = -EINVAL;
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goto exit;
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}
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desc = (struct sof_probe_point_desc *)tkns;
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ret = sof_ipc_probe_points_add(sdev,
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desc, bytes / sizeof(*desc));
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if (!ret)
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ret = count;
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exit:
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kfree(tkns);
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return ret;
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}
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static const struct file_operations probe_points_fops = {
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.open = simple_open,
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.read = probe_points_read,
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.write = probe_points_write,
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.llseek = default_llseek,
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};
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static ssize_t probe_points_remove_write(struct file *file,
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const char __user *from, 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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size_t num_tkns;
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u32 *tkns;
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int ret;
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if (sdev->extractor_stream_tag == SOF_PROBE_INVALID_NODE_ID) {
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dev_warn(sdev->dev, "no extractor stream running\n");
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return -ENOENT;
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}
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ret = tokenize_input(from, count, ppos, &tkns, &num_tkns);
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if (ret < 0)
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return ret;
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if (!num_tkns) {
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ret = -EINVAL;
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goto exit;
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}
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ret = sof_ipc_probe_points_remove(sdev, tkns, num_tkns);
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if (!ret)
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ret = count;
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exit:
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kfree(tkns);
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return ret;
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}
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static const struct file_operations probe_points_remove_fops = {
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.open = simple_open,
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.write = probe_points_remove_write,
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.llseek = default_llseek,
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};
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static int snd_sof_debugfs_probe_item(struct snd_sof_dev *sdev,
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const char *name, mode_t mode,
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const struct file_operations *fops)
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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->type = SOF_DFSENTRY_TYPE_BUF;
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dfse->sdev = sdev;
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debugfs_create_file(name, mode, sdev->debugfs_root, dfse, 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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#endif
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
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#define MAX_IPC_FLOOD_DURATION_MS 1000
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#define MAX_IPC_FLOOD_COUNT 10000
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#define IPC_FLOOD_TEST_RESULT_LEN 512
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static int sof_debug_ipc_flood_test(struct snd_sof_dev *sdev,
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struct snd_sof_dfsentry *dfse,
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bool flood_duration_test,
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unsigned long ipc_duration_ms,
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unsigned long ipc_count)
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{
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struct sof_ipc_cmd_hdr hdr;
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struct sof_ipc_reply reply;
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u64 min_response_time = U64_MAX;
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ktime_t start, end, test_end;
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u64 avg_response_time = 0;
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u64 max_response_time = 0;
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u64 ipc_response_time;
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int i = 0;
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int ret;
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/* configure test IPC */
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hdr.cmd = SOF_IPC_GLB_TEST_MSG | SOF_IPC_TEST_IPC_FLOOD;
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hdr.size = sizeof(hdr);
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/* set test end time for duration flood test */
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if (flood_duration_test)
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test_end = ktime_get_ns() + ipc_duration_ms * NSEC_PER_MSEC;
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/* send test IPC's */
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while (1) {
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start = ktime_get();
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ret = sof_ipc_tx_message(sdev->ipc, hdr.cmd, &hdr, hdr.size,
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&reply, sizeof(reply));
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end = ktime_get();
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if (ret < 0)
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break;
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/* compute min and max response times */
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ipc_response_time = ktime_to_ns(ktime_sub(end, start));
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min_response_time = min(min_response_time, ipc_response_time);
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max_response_time = max(max_response_time, ipc_response_time);
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/* sum up response times */
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avg_response_time += ipc_response_time;
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i++;
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/* test complete? */
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if (flood_duration_test) {
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if (ktime_to_ns(end) >= test_end)
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break;
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} else {
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if (i == ipc_count)
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break;
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}
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}
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if (ret < 0)
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dev_err(sdev->dev,
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"error: ipc flood test failed at %d iterations\n", i);
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/* return if the first IPC fails */
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if (!i)
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return ret;
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/* compute average response time */
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do_div(avg_response_time, i);
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/* clear previous test output */
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memset(dfse->cache_buf, 0, IPC_FLOOD_TEST_RESULT_LEN);
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if (flood_duration_test) {
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dev_dbg(sdev->dev, "IPC Flood test duration: %lums\n",
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ipc_duration_ms);
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snprintf(dfse->cache_buf, IPC_FLOOD_TEST_RESULT_LEN,
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"IPC Flood test duration: %lums\n", ipc_duration_ms);
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}
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dev_dbg(sdev->dev,
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"IPC Flood count: %d, Avg response time: %lluns\n",
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i, avg_response_time);
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dev_dbg(sdev->dev, "Max response time: %lluns\n",
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max_response_time);
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dev_dbg(sdev->dev, "Min response time: %lluns\n",
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min_response_time);
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/* format output string */
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snprintf(dfse->cache_buf + strlen(dfse->cache_buf),
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IPC_FLOOD_TEST_RESULT_LEN - strlen(dfse->cache_buf),
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"IPC Flood count: %d\nAvg response time: %lluns\n",
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i, avg_response_time);
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snprintf(dfse->cache_buf + strlen(dfse->cache_buf),
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IPC_FLOOD_TEST_RESULT_LEN - strlen(dfse->cache_buf),
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"Max response time: %lluns\nMin response time: %lluns\n",
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max_response_time, min_response_time);
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return ret;
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}
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#endif
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static ssize_t sof_dfsentry_write(struct file *file, const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
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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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unsigned long ipc_duration_ms = 0;
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bool flood_duration_test = false;
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unsigned long ipc_count = 0;
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struct dentry *dentry;
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int err;
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#endif
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size_t size;
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char *string;
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int ret;
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string = kzalloc(count+1, GFP_KERNEL);
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if (!string)
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return -ENOMEM;
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size = simple_write_to_buffer(string, count, ppos, buffer, count);
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ret = size;
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
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/*
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* write op is only supported for ipc_flood_count or
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* ipc_flood_duration_ms debugfs entries atm.
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* ipc_flood_count floods the DSP with the number of IPC's specified.
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* ipc_duration_ms test floods the DSP for the time specified
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* in the debugfs entry.
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*/
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dentry = file->f_path.dentry;
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if (strcmp(dentry->d_name.name, "ipc_flood_count") &&
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strcmp(dentry->d_name.name, "ipc_flood_duration_ms")) {
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ret = -EINVAL;
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goto out;
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}
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if (!strcmp(dentry->d_name.name, "ipc_flood_duration_ms"))
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flood_duration_test = true;
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|
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/* test completion criterion */
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if (flood_duration_test)
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ret = kstrtoul(string, 0, &ipc_duration_ms);
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else
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ret = kstrtoul(string, 0, &ipc_count);
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if (ret < 0)
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goto out;
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|
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/* limit max duration/ipc count for flood test */
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if (flood_duration_test) {
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if (!ipc_duration_ms) {
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ret = size;
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goto out;
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}
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/* find the minimum. min() is not used to avoid warnings */
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if (ipc_duration_ms > MAX_IPC_FLOOD_DURATION_MS)
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ipc_duration_ms = MAX_IPC_FLOOD_DURATION_MS;
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} else {
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if (!ipc_count) {
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ret = size;
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goto out;
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}
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/* find the minimum. min() is not used to avoid warnings */
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if (ipc_count > MAX_IPC_FLOOD_COUNT)
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ipc_count = MAX_IPC_FLOOD_COUNT;
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}
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ret = pm_runtime_get_sync(sdev->dev);
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if (ret < 0 && ret != -EACCES) {
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dev_err_ratelimited(sdev->dev,
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|
"error: debugfs write failed to resume %d\n",
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|
ret);
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|
pm_runtime_put_noidle(sdev->dev);
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|
goto out;
|
|
}
|
|
|
|
/* flood test */
|
|
ret = sof_debug_ipc_flood_test(sdev, dfse, flood_duration_test,
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ipc_duration_ms, ipc_count);
|
|
|
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pm_runtime_mark_last_busy(sdev->dev);
|
|
err = pm_runtime_put_autosuspend(sdev->dev);
|
|
if (err < 0)
|
|
dev_err_ratelimited(sdev->dev,
|
|
"error: debugfs write failed to idle %d\n",
|
|
err);
|
|
|
|
/* return size if test is successful */
|
|
if (ret >= 0)
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|
ret = size;
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|
out:
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|
#endif
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|
kfree(string);
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|
return ret;
|
|
}
|
|
|
|
static ssize_t sof_dfsentry_read(struct file *file, char __user *buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct snd_sof_dfsentry *dfse = file->private_data;
|
|
struct snd_sof_dev *sdev = dfse->sdev;
|
|
loff_t pos = *ppos;
|
|
size_t size_ret;
|
|
int skip = 0;
|
|
int size;
|
|
u8 *buf;
|
|
|
|
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
|
|
struct dentry *dentry;
|
|
|
|
dentry = file->f_path.dentry;
|
|
if ((!strcmp(dentry->d_name.name, "ipc_flood_count") ||
|
|
!strcmp(dentry->d_name.name, "ipc_flood_duration_ms"))) {
|
|
if (*ppos)
|
|
return 0;
|
|
|
|
count = strlen(dfse->cache_buf);
|
|
size_ret = copy_to_user(buffer, dfse->cache_buf, count);
|
|
if (size_ret)
|
|
return -EFAULT;
|
|
|
|
*ppos += count;
|
|
return count;
|
|
}
|
|
#endif
|
|
size = dfse->size;
|
|
|
|
/* validate position & count */
|
|
if (pos < 0)
|
|
return -EINVAL;
|
|
if (pos >= size || !count)
|
|
return 0;
|
|
/* find the minimum. min() is not used since it adds sparse warnings */
|
|
if (count > size - pos)
|
|
count = size - pos;
|
|
|
|
/* align io read start to u32 multiple */
|
|
pos = ALIGN_DOWN(pos, 4);
|
|
|
|
/* intermediate buffer size must be u32 multiple */
|
|
size = ALIGN(count, 4);
|
|
|
|
/* if start position is unaligned, read extra u32 */
|
|
if (unlikely(pos != *ppos)) {
|
|
skip = *ppos - pos;
|
|
if (pos + size + 4 < dfse->size)
|
|
size += 4;
|
|
}
|
|
|
|
buf = kzalloc(size, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
if (dfse->type == SOF_DFSENTRY_TYPE_IOMEM) {
|
|
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
|
|
/*
|
|
* If the DSP is active: copy from IO.
|
|
* If the DSP is suspended:
|
|
* - Copy from IO if the memory is always accessible.
|
|
* - Otherwise, copy from cached buffer.
|
|
*/
|
|
if (pm_runtime_active(sdev->dev) ||
|
|
dfse->access_type == SOF_DEBUGFS_ACCESS_ALWAYS) {
|
|
memcpy_fromio(buf, dfse->io_mem + pos, size);
|
|
} else {
|
|
dev_info(sdev->dev,
|
|
"Copying cached debugfs data\n");
|
|
memcpy(buf, dfse->cache_buf + pos, size);
|
|
}
|
|
#else
|
|
/* if the DSP is in D3 */
|
|
if (!pm_runtime_active(sdev->dev) &&
|
|
dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY) {
|
|
dev_err(sdev->dev,
|
|
"error: debugfs entry cannot be read in DSP D3\n");
|
|
kfree(buf);
|
|
return -EINVAL;
|
|
}
|
|
|
|
memcpy_fromio(buf, dfse->io_mem + pos, size);
|
|
#endif
|
|
} else {
|
|
memcpy(buf, ((u8 *)(dfse->buf) + pos), size);
|
|
}
|
|
|
|
/* copy to userspace */
|
|
size_ret = copy_to_user(buffer, buf + skip, count);
|
|
|
|
kfree(buf);
|
|
|
|
/* update count & position if copy succeeded */
|
|
if (size_ret)
|
|
return -EFAULT;
|
|
|
|
*ppos = pos + count;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations sof_dfs_fops = {
|
|
.open = simple_open,
|
|
.read = sof_dfsentry_read,
|
|
.llseek = default_llseek,
|
|
.write = sof_dfsentry_write,
|
|
};
|
|
|
|
/* create FS entry for debug files that can expose DSP memories, registers */
|
|
int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
|
|
void __iomem *base, size_t size,
|
|
const char *name,
|
|
enum sof_debugfs_access_type access_type)
|
|
{
|
|
struct snd_sof_dfsentry *dfse;
|
|
|
|
if (!sdev)
|
|
return -EINVAL;
|
|
|
|
dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
|
|
if (!dfse)
|
|
return -ENOMEM;
|
|
|
|
dfse->type = SOF_DFSENTRY_TYPE_IOMEM;
|
|
dfse->io_mem = base;
|
|
dfse->size = size;
|
|
dfse->sdev = sdev;
|
|
dfse->access_type = access_type;
|
|
|
|
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
|
|
/*
|
|
* allocate cache buffer that will be used to save the mem window
|
|
* contents prior to suspend
|
|
*/
|
|
if (access_type == SOF_DEBUGFS_ACCESS_D0_ONLY) {
|
|
dfse->cache_buf = devm_kzalloc(sdev->dev, size, GFP_KERNEL);
|
|
if (!dfse->cache_buf)
|
|
return -ENOMEM;
|
|
}
|
|
#endif
|
|
|
|
debugfs_create_file(name, 0444, sdev->debugfs_root, dfse,
|
|
&sof_dfs_fops);
|
|
|
|
/* add to dfsentry list */
|
|
list_add(&dfse->list, &sdev->dfsentry_list);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_sof_debugfs_io_item);
|
|
|
|
/* create FS entry for debug files to expose kernel memory */
|
|
int snd_sof_debugfs_buf_item(struct snd_sof_dev *sdev,
|
|
void *base, size_t size,
|
|
const char *name, mode_t mode)
|
|
{
|
|
struct snd_sof_dfsentry *dfse;
|
|
|
|
if (!sdev)
|
|
return -EINVAL;
|
|
|
|
dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
|
|
if (!dfse)
|
|
return -ENOMEM;
|
|
|
|
dfse->type = SOF_DFSENTRY_TYPE_BUF;
|
|
dfse->buf = base;
|
|
dfse->size = size;
|
|
dfse->sdev = sdev;
|
|
|
|
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
|
|
if (!strncmp(name, "ipc_flood", strlen("ipc_flood"))) {
|
|
/*
|
|
* cache_buf is unused for SOF_DFSENTRY_TYPE_BUF debugfs entries.
|
|
* So, use it to save the results of the last IPC flood test.
|
|
*/
|
|
dfse->cache_buf = devm_kzalloc(sdev->dev, IPC_FLOOD_TEST_RESULT_LEN,
|
|
GFP_KERNEL);
|
|
if (!dfse->cache_buf)
|
|
return -ENOMEM;
|
|
}
|
|
#endif
|
|
|
|
debugfs_create_file(name, mode, sdev->debugfs_root, dfse,
|
|
&sof_dfs_fops);
|
|
/* add to dfsentry list */
|
|
list_add(&dfse->list, &sdev->dfsentry_list);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_sof_debugfs_buf_item);
|
|
|
|
static int memory_info_update(struct snd_sof_dev *sdev, char *buf, size_t buff_size)
|
|
{
|
|
struct sof_ipc_cmd_hdr msg = {
|
|
.size = sizeof(struct sof_ipc_cmd_hdr),
|
|
.cmd = SOF_IPC_GLB_DEBUG | SOF_IPC_DEBUG_MEM_USAGE,
|
|
};
|
|
struct sof_ipc_dbg_mem_usage *reply;
|
|
int len;
|
|
int ret;
|
|
int i;
|
|
|
|
reply = kmalloc(SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL);
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ret = pm_runtime_get_sync(sdev->dev);
|
|
if (ret < 0 && ret != -EACCES) {
|
|
pm_runtime_put_noidle(sdev->dev);
|
|
dev_err(sdev->dev, "error: enabling device failed: %d\n", ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = sof_ipc_tx_message(sdev->ipc, msg.cmd, &msg, msg.size, reply, SOF_IPC_MSG_MAX_SIZE);
|
|
pm_runtime_mark_last_busy(sdev->dev);
|
|
pm_runtime_put_autosuspend(sdev->dev);
|
|
if (ret < 0 || reply->rhdr.error < 0) {
|
|
ret = min(ret, reply->rhdr.error);
|
|
dev_err(sdev->dev, "error: reading memory info failed, %d\n", ret);
|
|
goto error;
|
|
}
|
|
|
|
if (struct_size(reply, elems, reply->num_elems) != reply->rhdr.hdr.size) {
|
|
dev_err(sdev->dev, "error: invalid memory info ipc struct size, %d\n",
|
|
reply->rhdr.hdr.size);
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
for (i = 0, len = 0; i < reply->num_elems; i++) {
|
|
ret = snprintf(buf + len, buff_size - len, "zone %d.%d used %#8x free %#8x\n",
|
|
reply->elems[i].zone, reply->elems[i].id,
|
|
reply->elems[i].used, reply->elems[i].free);
|
|
if (ret < 0)
|
|
goto error;
|
|
len += ret;
|
|
}
|
|
|
|
ret = len;
|
|
error:
|
|
kfree(reply);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t memory_info_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
|
|
{
|
|
struct snd_sof_dfsentry *dfse = file->private_data;
|
|
struct snd_sof_dev *sdev = dfse->sdev;
|
|
int data_length;
|
|
|
|
/* read memory info from FW only once for each file read */
|
|
if (!*ppos) {
|
|
dfse->buf_data_size = 0;
|
|
data_length = memory_info_update(sdev, dfse->buf, dfse->size);
|
|
if (data_length < 0)
|
|
return data_length;
|
|
dfse->buf_data_size = data_length;
|
|
}
|
|
|
|
return simple_read_from_buffer(to, count, ppos, dfse->buf, dfse->buf_data_size);
|
|
}
|
|
|
|
static int memory_info_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct snd_sof_dfsentry *dfse = inode->i_private;
|
|
struct snd_sof_dev *sdev = dfse->sdev;
|
|
|
|
file->private_data = dfse;
|
|
|
|
/* allocate buffer memory only in first open run, to save memory when unused */
|
|
if (!dfse->buf) {
|
|
dfse->buf = devm_kmalloc(sdev->dev, PAGE_SIZE, GFP_KERNEL);
|
|
if (!dfse->buf)
|
|
return -ENOMEM;
|
|
dfse->size = PAGE_SIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations memory_info_fops = {
|
|
.open = memory_info_open,
|
|
.read = memory_info_read,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
int snd_sof_dbg_memory_info_init(struct snd_sof_dev *sdev)
|
|
{
|
|
struct snd_sof_dfsentry *dfse;
|
|
|
|
dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
|
|
if (!dfse)
|
|
return -ENOMEM;
|
|
|
|
/* don't allocate buffer before first usage, to save memory when unused */
|
|
dfse->type = SOF_DFSENTRY_TYPE_BUF;
|
|
dfse->sdev = sdev;
|
|
|
|
debugfs_create_file("memory_info", 0444, sdev->debugfs_root, dfse, &memory_info_fops);
|
|
|
|
/* add to dfsentry list */
|
|
list_add(&dfse->list, &sdev->dfsentry_list);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_sof_dbg_memory_info_init);
|
|
|
|
int snd_sof_dbg_init(struct snd_sof_dev *sdev)
|
|
{
|
|
const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
|
|
const struct snd_sof_debugfs_map *map;
|
|
int i;
|
|
int err;
|
|
|
|
/* use "sof" as top level debugFS dir */
|
|
sdev->debugfs_root = debugfs_create_dir("sof", NULL);
|
|
|
|
/* init dfsentry list */
|
|
INIT_LIST_HEAD(&sdev->dfsentry_list);
|
|
|
|
/* create debugFS files for platform specific MMIO/DSP memories */
|
|
for (i = 0; i < ops->debug_map_count; i++) {
|
|
map = &ops->debug_map[i];
|
|
|
|
err = snd_sof_debugfs_io_item(sdev, sdev->bar[map->bar] +
|
|
map->offset, map->size,
|
|
map->name, map->access_type);
|
|
/* errors are only due to memory allocation, not debugfs */
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES)
|
|
err = snd_sof_debugfs_probe_item(sdev, "probe_points",
|
|
0644, &probe_points_fops);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_sof_debugfs_probe_item(sdev, "probe_points_remove",
|
|
0200, &probe_points_remove_fops);
|
|
if (err < 0)
|
|
return err;
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
|
|
/* create read-write ipc_flood_count debugfs entry */
|
|
err = snd_sof_debugfs_buf_item(sdev, NULL, 0,
|
|
"ipc_flood_count", 0666);
|
|
|
|
/* errors are only due to memory allocation, not debugfs */
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* create read-write ipc_flood_duration_ms debugfs entry */
|
|
err = snd_sof_debugfs_buf_item(sdev, NULL, 0,
|
|
"ipc_flood_duration_ms", 0666);
|
|
|
|
/* errors are only due to memory allocation, not debugfs */
|
|
if (err < 0)
|
|
return err;
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_sof_dbg_init);
|
|
|
|
void snd_sof_free_debug(struct snd_sof_dev *sdev)
|
|
{
|
|
debugfs_remove_recursive(sdev->debugfs_root);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_sof_free_debug);
|
|
|
|
void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev)
|
|
{
|
|
if (IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_RETAIN_DSP_CONTEXT) ||
|
|
(sof_core_debug & SOF_DBG_RETAIN_CTX)) {
|
|
/* should we prevent DSP entering D3 ? */
|
|
dev_info(sdev->dev, "info: preventing DSP entering D3 state to preserve context\n");
|
|
pm_runtime_get_noresume(sdev->dev);
|
|
}
|
|
|
|
/* dump vital information to the logs */
|
|
snd_sof_dsp_dbg_dump(sdev, SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
|
|
snd_sof_ipc_dump(sdev);
|
|
snd_sof_trace_notify_for_error(sdev);
|
|
}
|
|
EXPORT_SYMBOL(snd_sof_handle_fw_exception);
|