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676 lines
17 KiB
676 lines
17 KiB
// 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 <[email protected]> |
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|
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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; |
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ret = sof_dtrace_host_trigger(sdev, SNDRV_PCM_TRIGGER_START); |
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if (ret < 0) { |
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dev_err(sdev->dev, "Host dtrace trigger start failed: %d\n", ret); |
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goto trace_release; |
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} |
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return 0; |
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trace_release: |
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priv->dtrace_state = SOF_DTRACE_DISABLED; |
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sof_dtrace_host_release(sdev); |
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return ret; |
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} |
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|
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static int ipc3_dtrace_init(struct snd_sof_dev *sdev) |
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{ |
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struct sof_dtrace_priv *priv; |
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int ret; |
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|
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/* dtrace is only supported with SOF_IPC */ |
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if (sdev->pdata->ipc_type != SOF_IPC) |
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return -EOPNOTSUPP; |
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|
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if (sdev->fw_trace_data) { |
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dev_err(sdev->dev, "fw_trace_data has been already allocated\n"); |
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return -EBUSY; |
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} |
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priv = devm_kzalloc(sdev->dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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sdev->fw_trace_data = priv; |
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/* set false before start initialization */ |
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priv->dtrace_state = SOF_DTRACE_DISABLED; |
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|
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/* allocate trace page table buffer */ |
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ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, sdev->dev, |
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PAGE_SIZE, &priv->dmatp); |
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if (ret < 0) { |
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dev_err(sdev->dev, "can't alloc page table for trace %d\n", ret); |
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return ret; |
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} |
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/* allocate trace data buffer */ |
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ret = snd_dma_alloc_dir_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev, |
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DMA_FROM_DEVICE, DMA_BUF_SIZE_FOR_TRACE, |
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&priv->dmatb); |
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if (ret < 0) { |
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dev_err(sdev->dev, "can't alloc buffer for trace %d\n", ret); |
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goto page_err; |
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} |
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|
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/* create compressed page table for audio firmware */ |
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ret = snd_sof_create_page_table(sdev->dev, &priv->dmatb, |
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priv->dmatp.area, priv->dmatb.bytes); |
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if (ret < 0) |
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goto table_err; |
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priv->dma_trace_pages = ret; |
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dev_dbg(sdev->dev, "dma_trace_pages: %d\n", priv->dma_trace_pages); |
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|
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if (sdev->first_boot) { |
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ret = debugfs_create_dtrace(sdev); |
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if (ret < 0) |
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goto table_err; |
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} |
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|
|
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, |
|
};
|
|
|