Define debugfs subdirectory delegated for IPC communication with DSP.
Input format: uint,uint,(...) which are later translated into DWORDS
sequence and further into instances of struct of interest given the IPC
type.
For Extractor probes, following have been enabled:
- PROBE_POINT_ADD (echo <..> probe_points)
- PROBE_POINT_REMOVE (echo <..> probe_points_remove)
- PROBE_POINT_INFO (cat probe_points)
Signed-off-by: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
---
sound/soc/intel/avs/avs.h | 7 +
sound/soc/intel/avs/core.c | 2 +
sound/soc/intel/avs/debugfs.c | 326 ++++++++++++++++++++++++++++++++++
3 files changed, 335 insertions(+)
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index e19d8d89455d..d7fccdcb9c16 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -144,6 +144,7 @@ struct avs_dev {
u32 aging_timer_period;
u32 fifo_full_timer_period;
u32 logged_resources; /* context dependent: core or library */
+ struct dentry *debugfs_root;
/* probes */
struct hdac_ext_stream *extractor;
unsigned int num_probe_streams;
@@ -378,6 +379,9 @@ void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int
void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len);
int avs_probe_platform_register(struct avs_dev *adev, const char *name);
+
+void avs_debugfs_init(struct avs_dev *adev);
+void avs_debugfs_exit(struct avs_dev *adev);
#else
#define AVS_SET_ENABLE_LOGS_OP(name)
@@ -399,6 +403,9 @@ static inline int avs_probe_platform_register(struct avs_dev *adev, const char *
{
return 0;
}
+
+static inline void avs_debugfs_init(struct avs_dev *adev) { }
+static inline void avs_debugfs_exit(struct avs_dev *adev) { }
#endif
#endif /* __SOUND_SOC_INTEL_AVS_H */
diff --git a/sound/soc/intel/avs/core.c b/sound/soc/intel/avs/core.c
index f7bc06404dbc..2ca24273c491 100644
--- a/sound/soc/intel/avs/core.c
+++ b/sound/soc/intel/avs/core.c
@@ -214,6 +214,7 @@ static void avs_hda_probe_work(struct work_struct *work)
adev->nhlt = intel_nhlt_init(adev->dev);
if (!adev->nhlt)
dev_info(bus->dev, "platform has no NHLT\n");
+ avs_debugfs_init(adev);
avs_register_all_boards(adev);
@@ -491,6 +492,7 @@ static void avs_pci_remove(struct pci_dev *pci)
avs_unregister_all_boards(adev);
+ avs_debugfs_exit(adev);
if (adev->nhlt)
intel_nhlt_free(adev->nhlt);
diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
index 78705bcb09fb..678572ee6b9d 100644
--- a/sound/soc/intel/avs/debugfs.c
+++ b/sound/soc/intel/avs/debugfs.c
@@ -9,7 +9,10 @@
#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)
{
@@ -44,3 +47,326 @@ void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsig
avs_dump_fw_log(adev, src, len);
wake_up(&adev->trace_waitq);
}
+
+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)
+{
+ struct avs_dev *adev = file->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&adev->trace_lock, flags);
+ 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_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);
+}
--
2.25.1
