diff options
Diffstat (limited to 'sound/soc/sof/trace.c')
| -rw-r--r-- | sound/soc/sof/trace.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c index 69889241a092..f72a6e83e6af 100644 --- a/sound/soc/sof/trace.c +++ b/sound/soc/sof/trace.c @@ -13,6 +13,225 @@ #include "sof-priv.h" #include "ops.h" +#define TRACE_FILTER_ELEMENTS_PER_ENTRY 4 +#define TRACE_FILTER_MAX_CONFIG_STRING_LENGTH 1024 + +static int trace_filter_append_elem(struct snd_sof_dev *sdev, uint32_t key, uint32_t value, + struct sof_ipc_trace_filter_elem *elem_list, + int capacity, int *counter) +{ + if (*counter >= capacity) + return -ENOMEM; + + elem_list[*counter].key = key; + elem_list[*counter].value = value; + ++*counter; + + return 0; +} + +static int trace_filter_parse_entry(struct snd_sof_dev *sdev, const char *line, + struct sof_ipc_trace_filter_elem *elem, + int capacity, int *counter) +{ + int len = strlen(line); + int cnt = *counter; + uint32_t uuid_id; + int log_level; + int pipe_id; + int comp_id; + int read; + int ret; + + /* ignore empty content */ + ret = sscanf(line, " %n", &read); + if (!ret && read == len) + return len; + + ret = sscanf(line, " %d %x %d %d %n", &log_level, &uuid_id, &pipe_id, &comp_id, &read); + if (ret != TRACE_FILTER_ELEMENTS_PER_ENTRY || read != len) { + dev_err(sdev->dev, "error: invalid trace filter entry '%s'\n", line); + return -EINVAL; + } + + if (uuid_id > 0) { + ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_UUID, + uuid_id, elem, capacity, &cnt); + if (ret) + return ret; + } + if (pipe_id >= 0) { + ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_PIPE, + pipe_id, elem, capacity, &cnt); + if (ret) + return ret; + } + if (comp_id >= 0) { + ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_BY_COMP, + comp_id, elem, capacity, &cnt); + if (ret) + return ret; + } + + ret = trace_filter_append_elem(sdev, SOF_IPC_TRACE_FILTER_ELEM_SET_LEVEL | + SOF_IPC_TRACE_FILTER_ELEM_FIN, + log_level, elem, capacity, &cnt); + if (ret) + return ret; + + /* update counter only when parsing whole entry passed */ + *counter = cnt; + + return len; +} + +static int trace_filter_parse(struct snd_sof_dev *sdev, char *string, + int *out_elem_cnt, + struct sof_ipc_trace_filter_elem **out) +{ + static const char entry_delimiter[] = ";"; + char *entry = string; + int capacity = 0; + int entry_len; + int cnt = 0; + + /* + * Each entry contains at least 1, up to TRACE_FILTER_ELEMENTS_PER_ENTRY + * IPC elements, depending on content. Calculate IPC elements capacity + * for the input string where each element is set. + */ + while (entry) { + capacity += TRACE_FILTER_ELEMENTS_PER_ENTRY; + entry = strchr(entry + 1, entry_delimiter[0]); + } + *out = kmalloc(capacity * sizeof(**out), GFP_KERNEL); + if (!*out) + return -ENOMEM; + + /* split input string by ';', and parse each entry separately in trace_filter_parse_entry */ + while ((entry = strsep(&string, entry_delimiter))) { + entry_len = trace_filter_parse_entry(sdev, entry, *out, capacity, &cnt); + if (entry_len < 0) { + dev_err(sdev->dev, "error: %s failed for '%s', %d\n", __func__, entry, + entry_len); + return -EINVAL; + } + } + + *out_elem_cnt = cnt; + + return 0; +} + +static int sof_ipc_trace_update_filter(struct snd_sof_dev *sdev, int num_elems, + struct sof_ipc_trace_filter_elem *elems) +{ + struct sof_ipc_trace_filter *msg; + struct sof_ipc_reply reply; + size_t size; + int ret; + + size = struct_size(msg, elems, num_elems); + if (size > SOF_IPC_MSG_MAX_SIZE) + return -EINVAL; + + msg = kmalloc(size, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + msg->hdr.size = size; + msg->hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_FILTER_UPDATE; + msg->elem_cnt = num_elems; + memcpy(&msg->elems[0], elems, num_elems * sizeof(*elems)); + + 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->hdr.cmd, msg, msg->hdr.size, + &reply, sizeof(reply)); + pm_runtime_mark_last_busy(sdev->dev); + pm_runtime_put_autosuspend(sdev->dev); + +error: + kfree(msg); + return ret ? ret : reply.error; +} + +static ssize_t sof_dfsentry_trace_filter_write(struct file *file, const char __user *from, + size_t count, loff_t *ppos) +{ + struct snd_sof_dfsentry *dfse = file->private_data; + struct sof_ipc_trace_filter_elem *elems = NULL; + struct snd_sof_dev *sdev = dfse->sdev; + loff_t pos = 0; + int num_elems; + char *string; + int ret; + + if (count > TRACE_FILTER_MAX_CONFIG_STRING_LENGTH) { + dev_err(sdev->dev, "%s too long input, %zu > %d\n", __func__, count, + TRACE_FILTER_MAX_CONFIG_STRING_LENGTH); + return -EINVAL; + } + + string = kmalloc(count + 1, GFP_KERNEL); + if (!string) + return -ENOMEM; + + /* assert null termination */ + string[count] = 0; + ret = simple_write_to_buffer(string, count, &pos, from, count); + if (ret < 0) + goto error; + + ret = trace_filter_parse(sdev, string, &num_elems, &elems); + if (ret < 0) { + dev_err(sdev->dev, "error: fail in trace_filter_parse, %d\n", ret); + goto error; + } + + if (num_elems) { + ret = sof_ipc_trace_update_filter(sdev, num_elems, elems); + if (ret < 0) { + dev_err(sdev->dev, "error: fail in sof_ipc_trace_update_filter %d\n", ret); + goto error; + } + } + ret = count; +error: + kfree(string); + kfree(elems); + return ret; +} + +static const struct file_operations sof_dfs_trace_filter_fops = { + .open = simple_open, + .write = sof_dfsentry_trace_filter_write, + .llseek = default_llseek, +}; + +static int trace_debugfs_filter_create(struct snd_sof_dev *sdev) +{ + struct snd_sof_dfsentry *dfse; + + dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL); + if (!dfse) + return -ENOMEM; + + dfse->sdev = sdev; + dfse->type = SOF_DFSENTRY_TYPE_BUF; + + debugfs_create_file("filter", 0200, sdev->debugfs_root, dfse, + &sof_dfs_trace_filter_fops); + /* add to dfsentry list */ + list_add(&dfse->list, &sdev->dfsentry_list); + + return 0; +} + static size_t sof_trace_avail(struct snd_sof_dev *sdev, loff_t pos, size_t buffer_size) { @@ -135,10 +354,15 @@ static const struct file_operations sof_dfs_trace_fops = { static int trace_debugfs_create(struct snd_sof_dev *sdev) { struct snd_sof_dfsentry *dfse; + int ret; if (!sdev) return -EINVAL; + ret = trace_debugfs_filter_create(sdev); + if (ret < 0) + dev_err(sdev->dev, "error: fail in %s, %d", __func__, ret); + dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL); if (!dfse) return -ENOMEM; |