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ASoC: SOF: Provide probe debugfs support
Define debugfs subdirectory delegated for IPC communication with DSP. Input format: uint,uint,(...) which are later translated into DWORDS sequence and further into instances of struct of interest given the IPC type. For Extractor probes, following have been enabled: - PROBE_POINT_ADD (echo <..> probe_points) - PROBE_POINT_REMOVE (echo <..> probe_points_remove) - PROBE_POINT_INFO (cat probe_points) Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20200218143924.10565-9-cezary.rojewski@intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cezary Rojewski
Mark Brown
parent
4c414da93a
commit
394695f410
@ -17,6 +17,221 @@
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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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@ -436,6 +651,17 @@ int snd_sof_dbg_init(struct snd_sof_dev *sdev)
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return err;
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}
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES)
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err = snd_sof_debugfs_probe_item(sdev, "probe_points",
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0644, &probe_points_fops);
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if (err < 0)
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return err;
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err = snd_sof_debugfs_probe_item(sdev, "probe_points_remove",
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0200, &probe_points_remove_fops);
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if (err < 0)
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return err;
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#endif
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
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/* create read-write ipc_flood_count debugfs entry */
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err = snd_sof_debugfs_buf_item(sdev, NULL, 0,
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