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 probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
53 struct avs_dev *adev = file->private_data;
54 struct avs_probe_point_desc *desc;
55 size_t num_desc, len = 0;
59 /* Prevent chaining, send and dump IPC value just once. */
63 buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
67 ret = avs_ipc_probe_get_points(adev, &desc, &num_desc);
69 ret = AVS_IPC_RET(ret);
73 for (i = 0; i < num_desc; i++) {
74 ret = snprintf(buf + len, PAGE_SIZE - len,
75 "Id: %#010x Purpose: %d Node id: %#x\n",
76 desc[i].id.value, desc[i].purpose, desc[i].node_id.val);
82 ret = simple_read_from_buffer(to, count, ppos, buf, len);
90 static ssize_t probe_points_write(struct file *file, const char __user *from, size_t count,
93 struct avs_dev *adev = file->private_data;
94 struct avs_probe_point_desc *desc;
95 u32 *array, num_elems;
99 ret = parse_int_array_user(from, count, (int **)&array);
104 bytes = sizeof(*array) * num_elems;
105 if (bytes % sizeof(*desc)) {
110 desc = (struct avs_probe_point_desc *)&array[1];
111 ret = avs_ipc_probe_connect_points(adev, desc, bytes / sizeof(*desc));
113 ret = AVS_IPC_RET(ret);
121 static const struct file_operations probe_points_fops = {
123 .read = probe_points_read,
124 .write = probe_points_write,
128 static ssize_t probe_points_disconnect_write(struct file *file, const char __user *from,
129 size_t count, loff_t *ppos)
131 struct avs_dev *adev = file->private_data;
132 union avs_probe_point_id *id;
133 u32 *array, num_elems;
137 ret = parse_int_array_user(from, count, (int **)&array);
142 bytes = sizeof(*array) * num_elems;
143 if (bytes % sizeof(*id)) {
148 id = (union avs_probe_point_id *)&array[1];
149 ret = avs_ipc_probe_disconnect_points(adev, id, bytes / sizeof(*id));
151 ret = AVS_IPC_RET(ret);
159 static const struct file_operations probe_points_disconnect_fops = {
161 .write = probe_points_disconnect_write,
162 .llseek = default_llseek,
165 static ssize_t strace_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
167 struct avs_dev *adev = file->private_data;
168 struct kfifo *fifo = &adev->trace_fifo;
171 if (kfifo_is_empty(fifo)) {
174 prepare_to_wait(&adev->trace_waitq, &wait, TASK_INTERRUPTIBLE);
175 if (!signal_pending(current))
177 finish_wait(&adev->trace_waitq, &wait);
180 if (kfifo_to_user(fifo, to, count, &copied))
186 static int strace_open(struct inode *inode, struct file *file)
188 struct avs_dev *adev = inode->i_private;
191 if (kfifo_initialized(&adev->trace_fifo))
194 ret = kfifo_alloc(&adev->trace_fifo, PAGE_SIZE, GFP_KERNEL);
198 file->private_data = adev;
202 static int strace_release(struct inode *inode, struct file *file)
204 union avs_notify_msg msg = AVS_NOTIFICATION(LOG_BUFFER_STATUS);
205 struct avs_dev *adev = file->private_data;
206 unsigned long resource_mask;
207 unsigned long flags, i;
210 resource_mask = adev->logged_resources;
211 num_cores = adev->hw_cfg.dsp_cores;
213 spin_lock_irqsave(&adev->trace_lock, flags);
215 /* Gather any remaining logs. */
216 for_each_set_bit(i, &resource_mask, num_cores) {
218 avs_dsp_op(adev, log_buffer_status, &msg);
221 kfifo_free(&adev->trace_fifo);
223 spin_unlock_irqrestore(&adev->trace_lock, flags);
228 static const struct file_operations strace_fops = {
229 .llseek = default_llseek,
232 .release = strace_release,
235 #define DISABLE_TIMERS UINT_MAX
237 static int enable_logs(struct avs_dev *adev, u32 resource_mask, u32 *priorities)
241 /* Logging demands D0i0 state from DSP. */
242 if (!adev->logged_resources) {
243 pm_runtime_get_sync(adev->dev);
245 ret = avs_dsp_disable_d0ix(adev);
250 ret = avs_ipc_set_system_time(adev);
251 if (ret && ret != AVS_IPC_NOT_SUPPORTED) {
252 ret = AVS_IPC_RET(ret);
256 ret = avs_dsp_op(adev, enable_logs, AVS_LOG_ENABLE, adev->aging_timer_period,
257 adev->fifo_full_timer_period, resource_mask, priorities);
261 adev->logged_resources |= resource_mask;
265 if (!adev->logged_resources) {
266 avs_dsp_enable_d0ix(adev);
268 pm_runtime_mark_last_busy(adev->dev);
269 pm_runtime_put_autosuspend(adev->dev);
275 static int disable_logs(struct avs_dev *adev, u32 resource_mask)
279 /* Check if there's anything to do. */
280 if (!adev->logged_resources)
283 ret = avs_dsp_op(adev, enable_logs, AVS_LOG_DISABLE, DISABLE_TIMERS, DISABLE_TIMERS,
284 resource_mask, NULL);
287 * If IPC fails causing recovery, logged_resources is already zero
288 * so unsetting bits is still safe.
290 adev->logged_resources &= ~resource_mask;
292 /* If that's the last resource, allow for D3. */
293 if (!adev->logged_resources) {
294 avs_dsp_enable_d0ix(adev);
295 pm_runtime_mark_last_busy(adev->dev);
296 pm_runtime_put_autosuspend(adev->dev);
302 static ssize_t trace_control_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
304 struct avs_dev *adev = file->private_data;
308 len = snprintf(buf, sizeof(buf), "0x%08x\n", adev->logged_resources);
310 return simple_read_from_buffer(to, count, ppos, buf, len);
313 static ssize_t trace_control_write(struct file *file, const char __user *from, size_t count,
316 struct avs_dev *adev = file->private_data;
317 u32 *array, num_elems;
321 ret = parse_int_array_user(from, count, (int **)&array);
326 resource_mask = array[1];
329 * Disable if just resource mask is provided - no log priority flags.
331 * Enable input format: mask, prio1, .., prioN
332 * Where 'N' equals number of bits set in the 'mask'.
334 if (num_elems == 1) {
335 ret = disable_logs(adev, resource_mask);
337 if (num_elems != (hweight_long(resource_mask) + 1)) {
342 ret = enable_logs(adev, resource_mask, &array[2]);
352 static const struct file_operations trace_control_fops = {
353 .llseek = default_llseek,
354 .read = trace_control_read,
355 .write = trace_control_write,
359 void avs_debugfs_init(struct avs_dev *adev)
361 init_waitqueue_head(&adev->trace_waitq);
362 spin_lock_init(&adev->trace_lock);
364 adev->debugfs_root = debugfs_create_dir("avs", snd_soc_debugfs_root);
366 /* Initialize timer periods with recommended defaults. */
367 adev->aging_timer_period = 10;
368 adev->fifo_full_timer_period = 10;
370 debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops);
371 debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops);
373 debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root,
374 &adev->aging_timer_period);
375 debugfs_create_u32("trace_fifo_full_period", 0644, adev->debugfs_root,
376 &adev->fifo_full_timer_period);
378 debugfs_create_file("probe_points", 0644, adev->debugfs_root, adev, &probe_points_fops);
379 debugfs_create_file("probe_points_disconnect", 0200, adev->debugfs_root, adev,
380 &probe_points_disconnect_fops);
383 void avs_debugfs_exit(struct avs_dev *adev)
385 debugfs_remove_recursive(adev->debugfs_root);