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-rw-r--r--sound/soc/sof/ipc4-telemetry.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/sound/soc/sof/ipc4-telemetry.c b/sound/soc/sof/ipc4-telemetry.c
new file mode 100644
index 0000000000..ec4ae96743
--- /dev/null
+++ b/sound/soc/sof/ipc4-telemetry.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018-2023 Intel Corporation. All rights reserved.
+//
+
+#include <linux/debugfs.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <sound/sof/debug.h>
+#include <sound/sof/ipc4/header.h>
+#include "sof-priv.h"
+#include "ops.h"
+#include "ipc4-telemetry.h"
+#include "ipc4-priv.h"
+
+static void __iomem *sof_ipc4_query_exception_address(struct snd_sof_dev *sdev)
+{
+ u32 type = SOF_IPC4_DEBUG_SLOT_TELEMETRY;
+ size_t telemetry_slot_offset;
+ u32 offset;
+
+ telemetry_slot_offset = sof_ipc4_find_debug_slot_offset_by_type(sdev, type);
+ if (!telemetry_slot_offset)
+ return NULL;
+
+ /* skip the first separator magic number */
+ offset = telemetry_slot_offset + sizeof(u32);
+
+ return sdev->bar[sdev->mailbox_bar] + offset;
+}
+
+static ssize_t sof_telemetry_entry_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct snd_sof_dfsentry *dfse = file->private_data;
+ struct snd_sof_dev *sdev = dfse->sdev;
+ void __iomem *io_addr;
+ loff_t pos = *ppos;
+ size_t size_ret;
+ u8 *buf;
+
+ if (pos < 0)
+ return -EINVAL;
+ /* skip the first separator magic number */
+ if (pos >= SOF_IPC4_DEBUG_SLOT_SIZE - 4 || !count)
+ return 0;
+ if (count > SOF_IPC4_DEBUG_SLOT_SIZE - 4 - pos)
+ count = SOF_IPC4_DEBUG_SLOT_SIZE - 4 - pos;
+
+ io_addr = sof_ipc4_query_exception_address(sdev);
+ if (!io_addr)
+ return -EFAULT;
+
+ buf = kzalloc(SOF_IPC4_DEBUG_SLOT_SIZE - 4, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ memcpy_fromio(buf, io_addr, SOF_IPC4_DEBUG_SLOT_SIZE - 4);
+ size_ret = copy_to_user(buffer, buf + pos, count);
+ if (size_ret) {
+ kfree(buf);
+ return -EFAULT;
+ }
+
+ *ppos = pos + count;
+ kfree(buf);
+
+ return count;
+}
+
+static const struct file_operations sof_telemetry_fops = {
+ .open = simple_open,
+ .read = sof_telemetry_entry_read,
+};
+
+void sof_ipc4_create_exception_debugfs_node(struct snd_sof_dev *sdev)
+{
+ struct snd_sof_dfsentry *dfse;
+
+ dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
+ if (!dfse)
+ return;
+
+ dfse->type = SOF_DFSENTRY_TYPE_IOMEM;
+ dfse->size = SOF_IPC4_DEBUG_SLOT_SIZE - 4;
+ dfse->access_type = SOF_DEBUGFS_ACCESS_ALWAYS;
+ dfse->sdev = sdev;
+
+ list_add(&dfse->list, &sdev->dfsentry_list);
+
+ debugfs_create_file("exception", 0444, sdev->debugfs_root, dfse, &sof_telemetry_fops);
+}