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- // SPDX-License-Identifier: GPL-2.0-only
- //
- // Copyright(c) 2022 Intel Corporation. All rights reserved.
- #include <linux/debugfs.h>
- #include <linux/sched/signal.h>
- #include <sound/sof/ipc4/header.h>
- #include "sof-priv.h"
- #include "ipc4-priv.h"
- /*
- * debug info window is organized in 16 (equal sized) pages:
- *
- * ------------------------
- * | Page0 - descriptors |
- * ------------------------
- * | Page1 - slot0 |
- * ------------------------
- * | Page2 - slot1 |
- * ------------------------
- * | ... |
- * ------------------------
- * | Page14 - slot13 |
- * ------------------------
- * | Page15 - slot14 |
- * ------------------------
- *
- * The slot size == page size
- *
- * The first page contains descriptors for the remaining 15 cores
- * The slot descriptor is:
- * u32 res_id;
- * u32 type;
- * u32 vma;
- *
- * Log buffer slots have the following layout:
- * u32 host_read_ptr;
- * u32 dsp_write_ptr;
- * u8 buffer[];
- *
- * The two pointers are offsets within the buffer.
- */
- #define SOF_MTRACE_DESCRIPTOR_SIZE 12 /* 3 x u32 */
- #define FW_EPOCH_DELTA 11644473600LL
- #define INVALID_SLOT_OFFSET 0xffffffff
- #define MAX_ALLOWED_LIBRARIES 16
- #define MAX_MTRACE_SLOTS 15
- #define SOF_MTRACE_PAGE_SIZE 0x1000
- #define SOF_MTRACE_SLOT_SIZE SOF_MTRACE_PAGE_SIZE
- /* debug log slot types */
- #define SOF_MTRACE_SLOT_UNUSED 0x00000000
- #define SOF_MTRACE_SLOT_CRITICAL_LOG 0x54524300 /* byte 0: core ID */
- #define SOF_MTRACE_SLOT_DEBUG_LOG 0x474f4c00 /* byte 0: core ID */
- #define SOF_MTRACE_SLOT_GDB_STUB 0x42444700
- #define SOF_MTRACE_SLOT_TELEMETRY 0x4c455400
- #define SOF_MTRACE_SLOT_BROKEN 0x44414544
- /* for debug and critical types */
- #define SOF_MTRACE_SLOT_CORE_MASK GENMASK(7, 0)
- #define SOF_MTRACE_SLOT_TYPE_MASK GENMASK(31, 8)
- #define DEFAULT_AGING_TIMER_PERIOD_MS 0x100
- #define DEFAULT_FIFO_FULL_TIMER_PERIOD_MS 0x1000
- /* ipc4 log level and source definitions for logs_priorities_mask */
- #define SOF_MTRACE_LOG_LEVEL_CRITICAL BIT(0)
- #define SOF_MTRACE_LOG_LEVEL_ERROR BIT(1)
- #define SOF_MTRACE_LOG_LEVEL_WARNING BIT(2)
- #define SOF_MTRACE_LOG_LEVEL_INFO BIT(3)
- #define SOF_MTRACE_LOG_LEVEL_VERBOSE BIT(4)
- #define SOF_MTRACE_LOG_SOURCE_INFRA BIT(5) /* log source 0 */
- #define SOF_MTRACE_LOG_SOURCE_HAL BIT(6)
- #define SOF_MTRACE_LOG_SOURCE_MODULE BIT(7)
- #define SOF_MTRACE_LOG_SOURCE_AUDIO BIT(8)
- #define SOF_MTRACE_LOG_SOURCE_SCHEDULER BIT(9)
- #define SOF_MTRACE_LOG_SOURCE_ULP_INFRA BIT(10)
- #define SOF_MTRACE_LOG_SOURCE_ULP_MODULE BIT(11)
- #define SOF_MTRACE_LOG_SOURCE_VISION BIT(12) /* log source 7 */
- #define DEFAULT_LOGS_PRIORITIES_MASK (SOF_MTRACE_LOG_LEVEL_CRITICAL | \
- SOF_MTRACE_LOG_LEVEL_ERROR | \
- SOF_MTRACE_LOG_LEVEL_WARNING | \
- SOF_MTRACE_LOG_LEVEL_INFO | \
- SOF_MTRACE_LOG_SOURCE_INFRA | \
- SOF_MTRACE_LOG_SOURCE_HAL | \
- SOF_MTRACE_LOG_SOURCE_MODULE | \
- SOF_MTRACE_LOG_SOURCE_AUDIO)
- struct sof_log_state_info {
- u32 aging_timer_period;
- u32 fifo_full_timer_period;
- u32 enable;
- u32 logs_priorities_mask[MAX_ALLOWED_LIBRARIES];
- } __packed;
- enum sof_mtrace_state {
- SOF_MTRACE_DISABLED,
- SOF_MTRACE_INITIALIZING,
- SOF_MTRACE_ENABLED,
- };
- struct sof_mtrace_core_data {
- struct snd_sof_dev *sdev;
- int id;
- u32 slot_offset;
- void *log_buffer;
- struct mutex buffer_lock; /* for log_buffer alloc/free */
- u32 host_read_ptr;
- u32 dsp_write_ptr;
- /* pos update IPC arrived before the slot offset is known, queried */
- bool delayed_pos_update;
- wait_queue_head_t trace_sleep;
- };
- struct sof_mtrace_priv {
- struct snd_sof_dev *sdev;
- enum sof_mtrace_state mtrace_state;
- struct sof_log_state_info state_info;
- struct sof_mtrace_core_data cores[];
- };
- static int sof_ipc4_mtrace_dfs_open(struct inode *inode, struct file *file)
- {
- struct sof_mtrace_core_data *core_data = inode->i_private;
- int ret;
- mutex_lock(&core_data->buffer_lock);
- if (core_data->log_buffer) {
- ret = -EBUSY;
- goto out;
- }
- ret = debugfs_file_get(file->f_path.dentry);
- if (unlikely(ret))
- goto out;
- core_data->log_buffer = kmalloc(SOF_MTRACE_SLOT_SIZE, GFP_KERNEL);
- if (!core_data->log_buffer) {
- debugfs_file_put(file->f_path.dentry);
- ret = -ENOMEM;
- goto out;
- }
- ret = simple_open(inode, file);
- if (ret) {
- kfree(core_data->log_buffer);
- debugfs_file_put(file->f_path.dentry);
- }
- out:
- mutex_unlock(&core_data->buffer_lock);
- return ret;
- }
- static bool sof_wait_mtrace_avail(struct sof_mtrace_core_data *core_data)
- {
- wait_queue_entry_t wait;
- /* data immediately available */
- if (core_data->host_read_ptr != core_data->dsp_write_ptr)
- return true;
- /* wait for available trace data from FW */
- init_waitqueue_entry(&wait, current);
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&core_data->trace_sleep, &wait);
- if (!signal_pending(current)) {
- /* set timeout to max value, no error code */
- schedule_timeout(MAX_SCHEDULE_TIMEOUT);
- }
- remove_wait_queue(&core_data->trace_sleep, &wait);
- if (core_data->host_read_ptr != core_data->dsp_write_ptr)
- return true;
- return false;
- }
- static ssize_t sof_ipc4_mtrace_dfs_read(struct file *file, char __user *buffer,
- size_t count, loff_t *ppos)
- {
- struct sof_mtrace_core_data *core_data = file->private_data;
- u32 log_buffer_offset, log_buffer_size, read_ptr, write_ptr;
- struct snd_sof_dev *sdev = core_data->sdev;
- struct sof_mtrace_priv *priv = sdev->fw_trace_data;
- void *log_buffer = core_data->log_buffer;
- loff_t lpos = *ppos;
- u32 avail;
- int ret;
- /* check pos and count */
- if (lpos < 0)
- return -EINVAL;
- if (!count || count < sizeof(avail))
- return 0;
- /* get available count based on current host offset */
- if (!sof_wait_mtrace_avail(core_data)) {
- /* No data available */
- avail = 0;
- if (copy_to_user(buffer, &avail, sizeof(avail)))
- return -EFAULT;
- return 0;
- }
- if (core_data->slot_offset == INVALID_SLOT_OFFSET)
- return 0;
- /* The log data buffer starts after the two pointer in the slot */
- log_buffer_offset = core_data->slot_offset + (sizeof(u32) * 2);
- /* The log data size excludes the pointers */
- log_buffer_size = SOF_MTRACE_SLOT_SIZE - (sizeof(u32) * 2);
- read_ptr = core_data->host_read_ptr;
- write_ptr = core_data->dsp_write_ptr;
- if (read_ptr < write_ptr)
- avail = write_ptr - read_ptr;
- else
- avail = log_buffer_size - read_ptr + write_ptr;
- if (!avail)
- return 0;
- if (avail > log_buffer_size)
- avail = log_buffer_size;
- /* Need space for the initial u32 of the avail */
- if (avail > count - sizeof(avail))
- avail = count - sizeof(avail);
- if (sof_debug_check_flag(SOF_DBG_PRINT_DMA_POSITION_UPDATE_LOGS))
- dev_dbg(sdev->dev,
- "core%d, host read: %#x, dsp write: %#x, avail: %#x\n",
- core_data->id, read_ptr, write_ptr, avail);
- if (read_ptr < write_ptr) {
- /* Read data between read pointer and write pointer */
- sof_mailbox_read(sdev, log_buffer_offset + read_ptr, log_buffer, avail);
- } else {
- /* read from read pointer to end of the slot */
- sof_mailbox_read(sdev, log_buffer_offset + read_ptr, log_buffer,
- avail - write_ptr);
- /* read from slot start to write pointer */
- if (write_ptr)
- sof_mailbox_read(sdev, log_buffer_offset,
- (u8 *)(log_buffer) + avail - write_ptr,
- write_ptr);
- }
- /* first write the number of bytes we have gathered */
- ret = copy_to_user(buffer, &avail, sizeof(avail));
- if (ret)
- return -EFAULT;
- /* Followed by the data itself */
- ret = copy_to_user(buffer + sizeof(avail), log_buffer, avail);
- if (ret)
- return -EFAULT;
- /* Update the host_read_ptr in the slot for this core */
- read_ptr += avail;
- if (read_ptr >= log_buffer_size)
- read_ptr -= log_buffer_size;
- sof_mailbox_write(sdev, core_data->slot_offset, &read_ptr, sizeof(read_ptr));
- /* Only update the host_read_ptr if mtrace is enabled */
- if (priv->mtrace_state != SOF_MTRACE_DISABLED)
- core_data->host_read_ptr = read_ptr;
- /*
- * Ask for a new buffer from user space for the next chunk, not
- * streaming due to the heading number of bytes value.
- */
- *ppos += count;
- return count;
- }
- static int sof_ipc4_mtrace_dfs_release(struct inode *inode, struct file *file)
- {
- struct sof_mtrace_core_data *core_data = inode->i_private;
- debugfs_file_put(file->f_path.dentry);
- mutex_lock(&core_data->buffer_lock);
- kfree(core_data->log_buffer);
- core_data->log_buffer = NULL;
- mutex_unlock(&core_data->buffer_lock);
- return 0;
- }
- static const struct file_operations sof_dfs_mtrace_fops = {
- .open = sof_ipc4_mtrace_dfs_open,
- .read = sof_ipc4_mtrace_dfs_read,
- .llseek = default_llseek,
- .release = sof_ipc4_mtrace_dfs_release,
- .owner = THIS_MODULE,
- };
- static ssize_t sof_ipc4_priority_mask_dfs_read(struct file *file, char __user *to,
- size_t count, loff_t *ppos)
- {
- struct sof_mtrace_priv *priv = file->private_data;
- int i, ret, offset, remaining;
- char *buf;
- /*
- * one entry (14 char + new line = 15):
- * " 0: 000001ef"
- *
- * 16 * 15 + 1 = 241
- */
- buf = kzalloc(241, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- for (i = 0; i < MAX_ALLOWED_LIBRARIES; i++) {
- offset = strlen(buf);
- remaining = 241 - offset;
- snprintf(buf + offset, remaining, "%2d: 0x%08x\n", i,
- priv->state_info.logs_priorities_mask[i]);
- }
- ret = simple_read_from_buffer(to, count, ppos, buf, strlen(buf));
- kfree(buf);
- return ret;
- }
- static ssize_t sof_ipc4_priority_mask_dfs_write(struct file *file,
- const char __user *from,
- size_t count, loff_t *ppos)
- {
- struct sof_mtrace_priv *priv = file->private_data;
- unsigned int id;
- char *buf;
- u32 mask;
- int ret;
- /*
- * To update Nth mask entry, write:
- * "N,0x1234" or "N,1234" to the debugfs file
- * The mask will be interpreted as hexadecimal number
- */
- buf = memdup_user_nul(from, count);
- if (IS_ERR(buf))
- return PTR_ERR(buf);
- ret = sscanf(buf, "%u,0x%x", &id, &mask);
- if (ret != 2) {
- ret = sscanf(buf, "%u,%x", &id, &mask);
- if (ret != 2) {
- ret = -EINVAL;
- goto out;
- }
- }
- if (id >= MAX_ALLOWED_LIBRARIES) {
- ret = -EINVAL;
- goto out;
- }
- priv->state_info.logs_priorities_mask[id] = mask;
- ret = count;
- out:
- kfree(buf);
- return ret;
- }
- static const struct file_operations sof_dfs_priority_mask_fops = {
- .open = simple_open,
- .read = sof_ipc4_priority_mask_dfs_read,
- .write = sof_ipc4_priority_mask_dfs_write,
- .llseek = default_llseek,
- .owner = THIS_MODULE,
- };
- static int mtrace_debugfs_create(struct snd_sof_dev *sdev)
- {
- struct sof_mtrace_priv *priv = sdev->fw_trace_data;
- struct dentry *dfs_root;
- char dfs_name[100];
- int i;
- dfs_root = debugfs_create_dir("mtrace", sdev->debugfs_root);
- if (IS_ERR_OR_NULL(dfs_root))
- return 0;
- /* Create files for the logging parameters */
- debugfs_create_u32("aging_timer_period", 0644, dfs_root,
- &priv->state_info.aging_timer_period);
- debugfs_create_u32("fifo_full_timer_period", 0644, dfs_root,
- &priv->state_info.fifo_full_timer_period);
- debugfs_create_file("logs_priorities_mask", 0644, dfs_root, priv,
- &sof_dfs_priority_mask_fops);
- /* Separate log files per core */
- for (i = 0; i < sdev->num_cores; i++) {
- snprintf(dfs_name, sizeof(dfs_name), "core%d", i);
- debugfs_create_file(dfs_name, 0444, dfs_root, &priv->cores[i],
- &sof_dfs_mtrace_fops);
- }
- return 0;
- }
- static int ipc4_mtrace_enable(struct snd_sof_dev *sdev)
- {
- struct sof_mtrace_priv *priv = sdev->fw_trace_data;
- const struct sof_ipc_ops *iops = sdev->ipc->ops;
- struct sof_ipc4_msg msg;
- u64 system_time;
- ktime_t kt;
- int ret;
- if (priv->mtrace_state != SOF_MTRACE_DISABLED)
- return 0;
- msg.primary = SOF_IPC4_MSG_TARGET(SOF_IPC4_MODULE_MSG);
- msg.primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST);
- msg.primary |= SOF_IPC4_MOD_ID(SOF_IPC4_MOD_INIT_BASEFW_MOD_ID);
- msg.primary |= SOF_IPC4_MOD_INSTANCE(SOF_IPC4_MOD_INIT_BASEFW_INSTANCE_ID);
- msg.extension = SOF_IPC4_MOD_EXT_MSG_PARAM_ID(SOF_IPC4_FW_PARAM_SYSTEM_TIME);
- /* The system time is in usec, UTC, epoch is 1601-01-01 00:00:00 */
- kt = ktime_add_us(ktime_get_real(), FW_EPOCH_DELTA * USEC_PER_SEC);
- system_time = ktime_to_us(kt);
- msg.data_size = sizeof(system_time);
- msg.data_ptr = &system_time;
- ret = iops->set_get_data(sdev, &msg, msg.data_size, true);
- if (ret)
- return ret;
- msg.extension = SOF_IPC4_MOD_EXT_MSG_PARAM_ID(SOF_IPC4_FW_PARAM_ENABLE_LOGS);
- priv->state_info.enable = 1;
- msg.data_size = sizeof(priv->state_info);
- msg.data_ptr = &priv->state_info;
- priv->mtrace_state = SOF_MTRACE_INITIALIZING;
- ret = iops->set_get_data(sdev, &msg, msg.data_size, true);
- if (ret) {
- priv->mtrace_state = SOF_MTRACE_DISABLED;
- return ret;
- }
- priv->mtrace_state = SOF_MTRACE_ENABLED;
- return 0;
- }
- static void ipc4_mtrace_disable(struct snd_sof_dev *sdev)
- {
- struct sof_mtrace_priv *priv = sdev->fw_trace_data;
- const struct sof_ipc_ops *iops = sdev->ipc->ops;
- struct sof_ipc4_msg msg;
- int i;
- if (priv->mtrace_state == SOF_MTRACE_DISABLED)
- return;
- msg.primary = SOF_IPC4_MSG_TARGET(SOF_IPC4_MODULE_MSG);
- msg.primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST);
- msg.primary |= SOF_IPC4_MOD_ID(SOF_IPC4_MOD_INIT_BASEFW_MOD_ID);
- msg.primary |= SOF_IPC4_MOD_INSTANCE(SOF_IPC4_MOD_INIT_BASEFW_INSTANCE_ID);
- msg.extension = SOF_IPC4_MOD_EXT_MSG_PARAM_ID(SOF_IPC4_FW_PARAM_ENABLE_LOGS);
- priv->state_info.enable = 0;
- msg.data_size = sizeof(priv->state_info);
- msg.data_ptr = &priv->state_info;
- iops->set_get_data(sdev, &msg, msg.data_size, true);
- priv->mtrace_state = SOF_MTRACE_DISABLED;
- for (i = 0; i < sdev->num_cores; i++) {
- struct sof_mtrace_core_data *core_data = &priv->cores[i];
- core_data->host_read_ptr = 0;
- core_data->dsp_write_ptr = 0;
- wake_up(&core_data->trace_sleep);
- }
- }
- /*
- * Each DSP core logs to a dedicated slot.
- * Parse the slot descriptors at debug_box offset to find the debug log slots
- * and map them to cores.
- * There are 15 slots and therefore 15 descriptors to check (MAX_MTRACE_SLOTS)
- */
- static void sof_mtrace_find_core_slots(struct snd_sof_dev *sdev)
- {
- struct sof_mtrace_priv *priv = sdev->fw_trace_data;
- struct sof_mtrace_core_data *core_data;
- u32 slot_desc_type_offset, type, core;
- int i;
- for (i = 0; i < MAX_MTRACE_SLOTS; i++) {
- /* The type is the second u32 in the slot descriptor */
- slot_desc_type_offset = sdev->debug_box.offset;
- slot_desc_type_offset += SOF_MTRACE_DESCRIPTOR_SIZE * i + sizeof(u32);
- sof_mailbox_read(sdev, slot_desc_type_offset, &type, sizeof(type));
- if ((type & SOF_MTRACE_SLOT_TYPE_MASK) == SOF_MTRACE_SLOT_DEBUG_LOG) {
- core = type & SOF_MTRACE_SLOT_CORE_MASK;
- if (core >= sdev->num_cores) {
- dev_dbg(sdev->dev, "core%u is invalid for slot%d\n",
- core, i);
- continue;
- }
- core_data = &priv->cores[core];
- /*
- * The area reserved for descriptors have the same size
- * as a slot.
- * In other words: slot0 starts at
- * debug_box + SOF_MTRACE_SLOT_SIZE offset
- */
- core_data->slot_offset = sdev->debug_box.offset;
- core_data->slot_offset += SOF_MTRACE_SLOT_SIZE * (i + 1);
- dev_dbg(sdev->dev, "slot%d is used for core%u\n", i, core);
- if (core_data->delayed_pos_update) {
- sof_ipc4_mtrace_update_pos(sdev, core);
- core_data->delayed_pos_update = false;
- }
- } else if (type) {
- dev_dbg(sdev->dev, "slot%d is not a log slot (%#x)\n", i, type);
- }
- }
- }
- static int ipc4_mtrace_init(struct snd_sof_dev *sdev)
- {
- struct sof_ipc4_fw_data *ipc4_data = sdev->private;
- struct sof_mtrace_priv *priv;
- int i, ret;
- if (sdev->fw_trace_data) {
- dev_err(sdev->dev, "fw_trace_data has been already allocated\n");
- return -EBUSY;
- }
- if (!ipc4_data->mtrace_log_bytes ||
- ipc4_data->mtrace_type != SOF_IPC4_MTRACE_INTEL_CAVS_2) {
- sdev->fw_trace_is_supported = false;
- return 0;
- }
- priv = devm_kzalloc(sdev->dev, struct_size(priv, cores, sdev->num_cores),
- GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- sdev->fw_trace_data = priv;
- /* Set initial values for mtrace parameters */
- priv->state_info.aging_timer_period = DEFAULT_AGING_TIMER_PERIOD_MS;
- priv->state_info.fifo_full_timer_period = DEFAULT_FIFO_FULL_TIMER_PERIOD_MS;
- /* Only enable basefw logs initially (index 0 is always basefw) */
- priv->state_info.logs_priorities_mask[0] = DEFAULT_LOGS_PRIORITIES_MASK;
- for (i = 0; i < sdev->num_cores; i++) {
- struct sof_mtrace_core_data *core_data = &priv->cores[i];
- init_waitqueue_head(&core_data->trace_sleep);
- mutex_init(&core_data->buffer_lock);
- core_data->sdev = sdev;
- core_data->id = i;
- }
- ret = ipc4_mtrace_enable(sdev);
- if (ret) {
- /*
- * Mark firmware tracing as not supported and return 0 to not
- * block the whole audio stack
- */
- sdev->fw_trace_is_supported = false;
- dev_dbg(sdev->dev, "initialization failed, fw tracing is disabled\n");
- return 0;
- }
- sof_mtrace_find_core_slots(sdev);
- ret = mtrace_debugfs_create(sdev);
- if (ret)
- ipc4_mtrace_disable(sdev);
- return ret;
- }
- static void ipc4_mtrace_free(struct snd_sof_dev *sdev)
- {
- ipc4_mtrace_disable(sdev);
- }
- int sof_ipc4_mtrace_update_pos(struct snd_sof_dev *sdev, int core)
- {
- struct sof_mtrace_priv *priv = sdev->fw_trace_data;
- struct sof_mtrace_core_data *core_data;
- if (!sdev->fw_trace_is_supported ||
- priv->mtrace_state == SOF_MTRACE_DISABLED)
- return 0;
- if (core >= sdev->num_cores)
- return -EINVAL;
- core_data = &priv->cores[core];
- if (core_data->slot_offset == INVALID_SLOT_OFFSET) {
- core_data->delayed_pos_update = true;
- return 0;
- }
- /* Read out the dsp_write_ptr from the slot for this core */
- sof_mailbox_read(sdev, core_data->slot_offset + sizeof(u32),
- &core_data->dsp_write_ptr, 4);
- core_data->dsp_write_ptr -= core_data->dsp_write_ptr % 4;
- if (sof_debug_check_flag(SOF_DBG_PRINT_DMA_POSITION_UPDATE_LOGS))
- dev_dbg(sdev->dev, "core%d, host read: %#x, dsp write: %#x",
- core, core_data->host_read_ptr, core_data->dsp_write_ptr);
- wake_up(&core_data->trace_sleep);
- return 0;
- }
- static int ipc4_mtrace_resume(struct snd_sof_dev *sdev)
- {
- return ipc4_mtrace_enable(sdev);
- }
- static void ipc4_mtrace_suspend(struct snd_sof_dev *sdev, pm_message_t pm_state)
- {
- ipc4_mtrace_disable(sdev);
- }
- const struct sof_ipc_fw_tracing_ops ipc4_mtrace_ops = {
- .init = ipc4_mtrace_init,
- .free = ipc4_mtrace_free,
- .suspend = ipc4_mtrace_suspend,
- .resume = ipc4_mtrace_resume,
- };
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