diff options
Diffstat (limited to 'sound/soc/intel/avs/debugfs.c')
| -rw-r--r-- | sound/soc/intel/avs/debugfs.c | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c new file mode 100644 index 000000000000..bdd388ec01ea --- /dev/null +++ b/sound/soc/intel/avs/debugfs.c @@ -0,0 +1,436 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright(c) 2021-2022 Intel Corporation. All rights reserved. +// +// Authors: Cezary Rojewski <cezary.rojewski@intel.com> +// Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com> +// + +#include <linux/debugfs.h> +#include <linux/kfifo.h> +#include <linux/wait.h> +#include <linux/sched/signal.h> +#include <sound/soc.h> +#include "avs.h" +#include "messages.h" + +static unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len) +{ + struct __kfifo *__fifo = &fifo->kfifo; + unsigned int l, off; + + len = min(len, kfifo_avail(fifo)); + off = __fifo->in & __fifo->mask; + l = min(len, kfifo_size(fifo) - off); + + memcpy_fromio(__fifo->data + off, src, l); + memcpy_fromio(__fifo->data, src + l, len - l); + /* Make sure data copied from SRAM is visible to all CPUs. */ + smp_mb(); + __fifo->in += len; + + return len; +} + +bool avs_logging_fw(struct avs_dev *adev) +{ + return kfifo_initialized(&adev->trace_fifo); +} + +void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len) +{ + __kfifo_fromio(&adev->trace_fifo, src, len); +} + +void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len) +{ + avs_dump_fw_log(adev, src, len); + wake_up(&adev->trace_waitq); +} + +static ssize_t fw_regs_read(struct file *file, char __user *to, size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + char *buf; + int ret; + + buf = kzalloc(AVS_FW_REGS_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + memcpy_fromio(buf, avs_sram_addr(adev, AVS_FW_REGS_WINDOW), AVS_FW_REGS_SIZE); + + ret = simple_read_from_buffer(to, count, ppos, buf, AVS_FW_REGS_SIZE); + kfree(buf); + return ret; +} + +static const struct file_operations fw_regs_fops = { + .open = simple_open, + .read = fw_regs_read, + .llseek = no_llseek, +}; + +static ssize_t debug_window_read(struct file *file, char __user *to, size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + size_t size; + char *buf; + int ret; + + size = adev->hw_cfg.dsp_cores * AVS_WINDOW_CHUNK_SIZE; + buf = kzalloc(size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + memcpy_fromio(buf, avs_sram_addr(adev, AVS_DEBUG_WINDOW), size); + + ret = simple_read_from_buffer(to, count, ppos, buf, size); + kfree(buf); + return ret; +} + +static const struct file_operations debug_window_fops = { + .open = simple_open, + .read = debug_window_read, + .llseek = no_llseek, +}; + +static ssize_t probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + struct avs_probe_point_desc *desc; + size_t num_desc, len = 0; + char *buf; + int i, ret; + + /* Prevent chaining, send and dump IPC value just once. */ + if (*ppos) + return 0; + + buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = avs_ipc_probe_get_points(adev, &desc, &num_desc); + if (ret) { + ret = AVS_IPC_RET(ret); + goto exit; + } + + for (i = 0; i < num_desc; i++) { + ret = snprintf(buf + len, PAGE_SIZE - len, + "Id: %#010x Purpose: %d Node id: %#x\n", + desc[i].id.value, desc[i].purpose, desc[i].node_id.val); + if (ret < 0) + goto free_desc; + len += ret; + } + + ret = simple_read_from_buffer(to, count, ppos, buf, len); +free_desc: + kfree(desc); +exit: + kfree(buf); + return ret; +} + +static ssize_t probe_points_write(struct file *file, const char __user *from, size_t count, + loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + struct avs_probe_point_desc *desc; + u32 *array, num_elems; + size_t bytes; + int ret; + + ret = parse_int_array_user(from, count, (int **)&array); + if (ret < 0) + return ret; + + num_elems = *array; + bytes = sizeof(*array) * num_elems; + if (bytes % sizeof(*desc)) { + ret = -EINVAL; + goto exit; + } + + desc = (struct avs_probe_point_desc *)&array[1]; + ret = avs_ipc_probe_connect_points(adev, desc, bytes / sizeof(*desc)); + if (ret) + ret = AVS_IPC_RET(ret); + else + ret = count; +exit: + kfree(array); + return ret; +} + +static const struct file_operations probe_points_fops = { + .open = simple_open, + .read = probe_points_read, + .write = probe_points_write, + .llseek = no_llseek, +}; + +static ssize_t probe_points_disconnect_write(struct file *file, const char __user *from, + size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + union avs_probe_point_id *id; + u32 *array, num_elems; + size_t bytes; + int ret; + + ret = parse_int_array_user(from, count, (int **)&array); + if (ret < 0) + return ret; + + num_elems = *array; + bytes = sizeof(*array) * num_elems; + if (bytes % sizeof(*id)) { + ret = -EINVAL; + goto exit; + } + + id = (union avs_probe_point_id *)&array[1]; + ret = avs_ipc_probe_disconnect_points(adev, id, bytes / sizeof(*id)); + if (ret) + ret = AVS_IPC_RET(ret); + else + ret = count; +exit: + kfree(array); + return ret; +} + +static const struct file_operations probe_points_disconnect_fops = { + .open = simple_open, + .write = probe_points_disconnect_write, + .llseek = default_llseek, +}; + +static ssize_t strace_read(struct file *file, char __user *to, size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + struct kfifo *fifo = &adev->trace_fifo; + unsigned int copied; + + if (kfifo_is_empty(fifo)) { + DEFINE_WAIT(wait); + + prepare_to_wait(&adev->trace_waitq, &wait, TASK_INTERRUPTIBLE); + if (!signal_pending(current)) + schedule(); + finish_wait(&adev->trace_waitq, &wait); + } + + if (kfifo_to_user(fifo, to, count, &copied)) + return -EFAULT; + *ppos += copied; + return copied; +} + +static int strace_open(struct inode *inode, struct file *file) +{ + struct avs_dev *adev = inode->i_private; + int ret; + + if (kfifo_initialized(&adev->trace_fifo)) + return -EBUSY; + + ret = kfifo_alloc(&adev->trace_fifo, PAGE_SIZE, GFP_KERNEL); + if (ret < 0) + return ret; + + file->private_data = adev; + return 0; +} + +static int strace_release(struct inode *inode, struct file *file) +{ + union avs_notify_msg msg = AVS_NOTIFICATION(LOG_BUFFER_STATUS); + struct avs_dev *adev = file->private_data; + unsigned long resource_mask; + unsigned long flags, i; + u32 num_cores; + + resource_mask = adev->logged_resources; + num_cores = adev->hw_cfg.dsp_cores; + + spin_lock_irqsave(&adev->trace_lock, flags); + + /* Gather any remaining logs. */ + for_each_set_bit(i, &resource_mask, num_cores) { + msg.log.core = i; + avs_dsp_op(adev, log_buffer_status, &msg); + } + + kfifo_free(&adev->trace_fifo); + + spin_unlock_irqrestore(&adev->trace_lock, flags); + + return 0; +} + +static const struct file_operations strace_fops = { + .llseek = default_llseek, + .read = strace_read, + .open = strace_open, + .release = strace_release, +}; + +#define DISABLE_TIMERS UINT_MAX + +static int enable_logs(struct avs_dev *adev, u32 resource_mask, u32 *priorities) +{ + int ret; + + /* Logging demands D0i0 state from DSP. */ + if (!adev->logged_resources) { + pm_runtime_get_sync(adev->dev); + + ret = avs_dsp_disable_d0ix(adev); + if (ret) + goto err_d0ix; + } + + ret = avs_ipc_set_system_time(adev); + if (ret && ret != AVS_IPC_NOT_SUPPORTED) { + ret = AVS_IPC_RET(ret); + goto err_ipc; + } + + ret = avs_dsp_op(adev, enable_logs, AVS_LOG_ENABLE, adev->aging_timer_period, + adev->fifo_full_timer_period, resource_mask, priorities); + if (ret) + goto err_ipc; + + adev->logged_resources |= resource_mask; + return 0; + +err_ipc: + if (!adev->logged_resources) { + avs_dsp_enable_d0ix(adev); +err_d0ix: + pm_runtime_mark_last_busy(adev->dev); + pm_runtime_put_autosuspend(adev->dev); + } + + return ret; +} + +static int disable_logs(struct avs_dev *adev, u32 resource_mask) +{ + int ret; + + /* Check if there's anything to do. */ + if (!adev->logged_resources) + return 0; + + ret = avs_dsp_op(adev, enable_logs, AVS_LOG_DISABLE, DISABLE_TIMERS, DISABLE_TIMERS, + resource_mask, NULL); + + /* + * If IPC fails causing recovery, logged_resources is already zero + * so unsetting bits is still safe. + */ + adev->logged_resources &= ~resource_mask; + + /* If that's the last resource, allow for D3. */ + if (!adev->logged_resources) { + avs_dsp_enable_d0ix(adev); + pm_runtime_mark_last_busy(adev->dev); + pm_runtime_put_autosuspend(adev->dev); + } + + return ret; +} + +static ssize_t trace_control_read(struct file *file, char __user *to, size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + char buf[64]; + int len; + + len = snprintf(buf, sizeof(buf), "0x%08x\n", adev->logged_resources); + + return simple_read_from_buffer(to, count, ppos, buf, len); +} + +static ssize_t trace_control_write(struct file *file, const char __user *from, size_t count, + loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + u32 *array, num_elems; + u32 resource_mask; + int ret; + + ret = parse_int_array_user(from, count, (int **)&array); + if (ret < 0) + return ret; + + num_elems = *array; + resource_mask = array[1]; + + /* + * Disable if just resource mask is provided - no log priority flags. + * + * Enable input format: mask, prio1, .., prioN + * Where 'N' equals number of bits set in the 'mask'. + */ + if (num_elems == 1) { + ret = disable_logs(adev, resource_mask); + } else { + if (num_elems != (hweight_long(resource_mask) + 1)) { + ret = -EINVAL; + goto free_array; + } + + ret = enable_logs(adev, resource_mask, &array[2]); + } + + if (!ret) + ret = count; +free_array: + kfree(array); + return ret; +} + +static const struct file_operations trace_control_fops = { + .llseek = default_llseek, + .read = trace_control_read, + .write = trace_control_write, + .open = simple_open, +}; + +void avs_debugfs_init(struct avs_dev *adev) +{ + init_waitqueue_head(&adev->trace_waitq); + spin_lock_init(&adev->trace_lock); + + adev->debugfs_root = debugfs_create_dir("avs", snd_soc_debugfs_root); + + /* Initialize timer periods with recommended defaults. */ + adev->aging_timer_period = 10; + adev->fifo_full_timer_period = 10; + + debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops); + debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops); + debugfs_create_file("fw_regs", 0444, adev->debugfs_root, adev, &fw_regs_fops); + debugfs_create_file("debug_window", 0444, adev->debugfs_root, adev, &debug_window_fops); + + debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root, + &adev->aging_timer_period); + debugfs_create_u32("trace_fifo_full_period", 0644, adev->debugfs_root, + &adev->fifo_full_timer_period); + + debugfs_create_file("probe_points", 0644, adev->debugfs_root, adev, &probe_points_fops); + debugfs_create_file("probe_points_disconnect", 0200, adev->debugfs_root, adev, + &probe_points_disconnect_fops); +} + +void avs_debugfs_exit(struct avs_dev *adev) +{ + debugfs_remove_recursive(adev->debugfs_root); +} |