1 // SPDX-License-Identifier: GPL-2.0-only
3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
6 // Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
9 #include <linux/debugfs.h>
10 #include <linux/kfifo.h>
11 #include <linux/wait.h>
12 #include <linux/sched/signal.h>
13 #include <sound/soc.h>
17 static unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len)
19 struct __kfifo *__fifo = &fifo->kfifo;
22 len = min(len, kfifo_avail(fifo));
23 off = __fifo->in & __fifo->mask;
24 l = min(len, kfifo_size(fifo) - off);
26 memcpy_fromio(__fifo->data + off, src, l);
27 memcpy_fromio(__fifo->data, src + l, len - l);
28 /* Make sure data copied from SRAM is visible to all CPUs. */
35 bool avs_logging_fw(struct avs_dev *adev)
37 return kfifo_initialized(&adev->trace_fifo);
40 void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len)
42 __kfifo_fromio(&adev->trace_fifo, src, len);
45 void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len)
47 avs_dump_fw_log(adev, src, len);
48 wake_up(&adev->trace_waitq);
51 static ssize_t fw_regs_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
53 struct avs_dev *adev = file->private_data;
57 buf = kzalloc(AVS_FW_REGS_SIZE, GFP_KERNEL);
61 memcpy_fromio(buf, avs_sram_addr(adev, AVS_FW_REGS_WINDOW), AVS_FW_REGS_SIZE);
63 ret = simple_read_from_buffer(to, count, ppos, buf, AVS_FW_REGS_SIZE);
68 static const struct file_operations fw_regs_fops = {
74 static ssize_t debug_window_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
76 struct avs_dev *adev = file->private_data;
81 size = adev->hw_cfg.dsp_cores * AVS_WINDOW_CHUNK_SIZE;
82 buf = kzalloc(size, GFP_KERNEL);
86 memcpy_fromio(buf, avs_sram_addr(adev, AVS_DEBUG_WINDOW), size);
88 ret = simple_read_from_buffer(to, count, ppos, buf, size);
93 static const struct file_operations debug_window_fops = {
95 .read = debug_window_read,
99 static ssize_t probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
101 struct avs_dev *adev = file->private_data;
102 struct avs_probe_point_desc *desc;
103 size_t num_desc, len = 0;
107 /* Prevent chaining, send and dump IPC value just once. */
111 buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
115 ret = avs_ipc_probe_get_points(adev, &desc, &num_desc);
117 ret = AVS_IPC_RET(ret);
121 for (i = 0; i < num_desc; i++) {
122 ret = snprintf(buf + len, PAGE_SIZE - len,
123 "Id: %#010x Purpose: %d Node id: %#x\n",
124 desc[i].id.value, desc[i].purpose, desc[i].node_id.val);
130 ret = simple_read_from_buffer(to, count, ppos, buf, len);
138 static ssize_t probe_points_write(struct file *file, const char __user *from, size_t count,
141 struct avs_dev *adev = file->private_data;
142 struct avs_probe_point_desc *desc;
143 u32 *array, num_elems;
147 ret = parse_int_array_user(from, count, (int **)&array);
152 bytes = sizeof(*array) * num_elems;
153 if (bytes % sizeof(*desc)) {
158 desc = (struct avs_probe_point_desc *)&array[1];
159 ret = avs_ipc_probe_connect_points(adev, desc, bytes / sizeof(*desc));
161 ret = AVS_IPC_RET(ret);
169 static const struct file_operations probe_points_fops = {
171 .read = probe_points_read,
172 .write = probe_points_write,
176 static ssize_t probe_points_disconnect_write(struct file *file, const char __user *from,
177 size_t count, loff_t *ppos)
179 struct avs_dev *adev = file->private_data;
180 union avs_probe_point_id *id;
181 u32 *array, num_elems;
185 ret = parse_int_array_user(from, count, (int **)&array);
190 bytes = sizeof(*array) * num_elems;
191 if (bytes % sizeof(*id)) {
196 id = (union avs_probe_point_id *)&array[1];
197 ret = avs_ipc_probe_disconnect_points(adev, id, bytes / sizeof(*id));
199 ret = AVS_IPC_RET(ret);
207 static const struct file_operations probe_points_disconnect_fops = {
209 .write = probe_points_disconnect_write,
210 .llseek = default_llseek,
213 static ssize_t strace_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
215 struct avs_dev *adev = file->private_data;
216 struct kfifo *fifo = &adev->trace_fifo;
219 if (kfifo_is_empty(fifo)) {
222 prepare_to_wait(&adev->trace_waitq, &wait, TASK_INTERRUPTIBLE);
223 if (!signal_pending(current))
225 finish_wait(&adev->trace_waitq, &wait);
228 if (kfifo_to_user(fifo, to, count, &copied))
234 static int strace_open(struct inode *inode, struct file *file)
236 struct avs_dev *adev = inode->i_private;
239 if (!try_module_get(adev->dev->driver->owner))
242 if (kfifo_initialized(&adev->trace_fifo))
245 ret = kfifo_alloc(&adev->trace_fifo, PAGE_SIZE, GFP_KERNEL);
249 file->private_data = adev;
253 static int strace_release(struct inode *inode, struct file *file)
255 union avs_notify_msg msg = AVS_NOTIFICATION(LOG_BUFFER_STATUS);
256 struct avs_dev *adev = file->private_data;
257 unsigned long resource_mask;
258 unsigned long flags, i;
261 resource_mask = adev->logged_resources;
262 num_cores = adev->hw_cfg.dsp_cores;
264 spin_lock_irqsave(&adev->trace_lock, flags);
266 /* Gather any remaining logs. */
267 for_each_set_bit(i, &resource_mask, num_cores) {
269 avs_dsp_op(adev, log_buffer_status, &msg);
272 kfifo_free(&adev->trace_fifo);
274 spin_unlock_irqrestore(&adev->trace_lock, flags);
276 module_put(adev->dev->driver->owner);
280 static const struct file_operations strace_fops = {
281 .llseek = default_llseek,
284 .release = strace_release,
287 #define DISABLE_TIMERS UINT_MAX
289 static int enable_logs(struct avs_dev *adev, u32 resource_mask, u32 *priorities)
293 /* Logging demands D0i0 state from DSP. */
294 if (!adev->logged_resources) {
295 pm_runtime_get_sync(adev->dev);
297 ret = avs_dsp_disable_d0ix(adev);
302 ret = avs_ipc_set_system_time(adev);
303 if (ret && ret != AVS_IPC_NOT_SUPPORTED) {
304 ret = AVS_IPC_RET(ret);
308 ret = avs_dsp_op(adev, enable_logs, AVS_LOG_ENABLE, adev->aging_timer_period,
309 adev->fifo_full_timer_period, resource_mask, priorities);
313 adev->logged_resources |= resource_mask;
317 if (!adev->logged_resources) {
318 avs_dsp_enable_d0ix(adev);
320 pm_runtime_mark_last_busy(adev->dev);
321 pm_runtime_put_autosuspend(adev->dev);
327 static int disable_logs(struct avs_dev *adev, u32 resource_mask)
331 /* Check if there's anything to do. */
332 if (!adev->logged_resources)
335 ret = avs_dsp_op(adev, enable_logs, AVS_LOG_DISABLE, DISABLE_TIMERS, DISABLE_TIMERS,
336 resource_mask, NULL);
339 * If IPC fails causing recovery, logged_resources is already zero
340 * so unsetting bits is still safe.
342 adev->logged_resources &= ~resource_mask;
344 /* If that's the last resource, allow for D3. */
345 if (!adev->logged_resources) {
346 avs_dsp_enable_d0ix(adev);
347 pm_runtime_mark_last_busy(adev->dev);
348 pm_runtime_put_autosuspend(adev->dev);
354 static ssize_t trace_control_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
356 struct avs_dev *adev = file->private_data;
360 len = snprintf(buf, sizeof(buf), "0x%08x\n", adev->logged_resources);
362 return simple_read_from_buffer(to, count, ppos, buf, len);
365 static ssize_t trace_control_write(struct file *file, const char __user *from, size_t count,
368 struct avs_dev *adev = file->private_data;
369 u32 *array, num_elems;
373 ret = parse_int_array_user(from, count, (int **)&array);
378 resource_mask = array[1];
381 * Disable if just resource mask is provided - no log priority flags.
383 * Enable input format: mask, prio1, .., prioN
384 * Where 'N' equals number of bits set in the 'mask'.
386 if (num_elems == 1) {
387 ret = disable_logs(adev, resource_mask);
389 if (num_elems != (hweight_long(resource_mask) + 1)) {
394 ret = enable_logs(adev, resource_mask, &array[2]);
404 static const struct file_operations trace_control_fops = {
405 .llseek = default_llseek,
406 .read = trace_control_read,
407 .write = trace_control_write,
411 void avs_debugfs_init(struct avs_dev *adev)
413 init_waitqueue_head(&adev->trace_waitq);
414 spin_lock_init(&adev->trace_lock);
416 adev->debugfs_root = debugfs_create_dir("avs", snd_soc_debugfs_root);
418 /* Initialize timer periods with recommended defaults. */
419 adev->aging_timer_period = 10;
420 adev->fifo_full_timer_period = 10;
422 debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops);
423 debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops);
424 debugfs_create_file("fw_regs", 0444, adev->debugfs_root, adev, &fw_regs_fops);
425 debugfs_create_file("debug_window", 0444, adev->debugfs_root, adev, &debug_window_fops);
427 debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root,
428 &adev->aging_timer_period);
429 debugfs_create_u32("trace_fifo_full_period", 0644, adev->debugfs_root,
430 &adev->fifo_full_timer_period);
432 debugfs_create_file("probe_points", 0644, adev->debugfs_root, adev, &probe_points_fops);
433 debugfs_create_file("probe_points_disconnect", 0200, adev->debugfs_root, adev,
434 &probe_points_disconnect_fops);
437 void avs_debugfs_exit(struct avs_dev *adev)
439 debugfs_remove_recursive(adev->debugfs_root);