ASoC: SOF: mediatek: Add mediatek common debug dump

1.Add mtk-adsp-common.c file for mediatek platforms common usage.
2.Add mtk_adsp_dump implementation in mtk-adsp-common.c for general
  debug dump.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: YC Hung <yc.hung@mediatek.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220517173109.468568-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/mediatek/Makefile b/sound/soc/sof/mediatek/Makefile
index 6ca8b82..29c5afb 100644 (file)
--- a/sound/soc/sof/mediatek/Makefile
+++ b/sound/soc/sof/mediatek/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+obj-$(CONFIG_SND_SOC_SOF_MTK_COMMON) += mtk-adsp-common.o
 obj-$(CONFIG_SND_SOC_SOF_MT8195) += mt8195/
 obj-$(CONFIG_SND_SOC_SOF_MT8186) += mt8186/

diff --git a/sound/soc/sof/mediatek/mtk-adsp-common.c b/sound/soc/sof/mediatek/mtk-adsp-common.c
new file mode 100644 (file)
index 0000000..1e0769c
--- /dev/null
+++ b/sound/soc/sof/mediatek/mtk-adsp-common.c
@@ -0,0 +1,84 @@
+// 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) 2022 MediaTek Inc. All rights reserved.
+//
+// Author: YC Hung <yc.hung@mediatek.com>
+
+/*
+ * Common helpers for the audio DSP on MediaTek platforms
+ */
+
+#include <linux/module.h>
+#include <sound/sof/xtensa.h>
+#include "../ops.h"
+#include "mtk-adsp-common.h"
+
+/**
+ * mtk_adsp_get_registers() - This function is called in case of DSP oops
+ * in order to gather information about the registers, filename and
+ * linenumber and stack.
+ * @sdev: SOF device
+ * @xoops: Stores information about registers.
+ * @panic_info: Stores information about filename and line number.
+ * @stack: Stores the stack dump.
+ * @stack_words: Size of the stack dump.
+ */
+static void mtk_adsp_get_registers(struct snd_sof_dev *sdev,
+                                  struct sof_ipc_dsp_oops_xtensa *xoops,
+                                  struct sof_ipc_panic_info *panic_info,
+                                  u32 *stack, size_t stack_words)
+{
+       u32 offset = sdev->dsp_oops_offset;
+
+       /* first read registers */
+       sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));
+
+       /* then get panic info */
+       if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {
+               dev_err(sdev->dev, "invalid header size 0x%x\n",
+                       xoops->arch_hdr.totalsize);
+               return;
+       }
+       offset += xoops->arch_hdr.totalsize;
+       sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));
+
+       /* then get the stack */
+       offset += sizeof(*panic_info);
+       sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));
+}
+
+/**
+ * mtk_adsp_dump() - This function is called when a panic message is
+ * received from the firmware.
+ * @sdev: SOF device
+ * @flags: parameter not used but required by ops prototype
+ */
+void mtk_adsp_dump(struct snd_sof_dev *sdev, u32 flags)
+{
+       char *level = (flags & SOF_DBG_DUMP_OPTIONAL) ? KERN_DEBUG : KERN_ERR;
+       struct sof_ipc_dsp_oops_xtensa xoops;
+       struct sof_ipc_panic_info panic_info;
+       u32 stack[MTK_ADSP_STACK_DUMP_SIZE];
+       u32 status;
+
+       /* Get information about the panic status from the debug box area.
+        * Compute the trace point based on the status.
+        */
+       sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4);
+
+       /* Get information about the registers, the filename and line
+        * number and the stack.
+        */
+       mtk_adsp_get_registers(sdev, &xoops, &panic_info, stack,
+                              MTK_ADSP_STACK_DUMP_SIZE);
+
+       /* Print the information to the console */
+       sof_print_oops_and_stack(sdev, level, status, status, &xoops, &panic_info,
+                                stack, MTK_ADSP_STACK_DUMP_SIZE);
+}
+EXPORT_SYMBOL(mtk_adsp_dump);
+
+MODULE_LICENSE("Dual BSD/GPL");

diff --git a/sound/soc/sof/mediatek/mtk-adsp-common.h b/sound/soc/sof/mediatek/mtk-adsp-common.h
new file mode 100644 (file)
index 0000000..612cff1
--- /dev/null
+++ b/sound/soc/sof/mediatek/mtk-adsp-common.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+
+#ifndef __MEDIATEK_ADSP_COMMON_H__
+#define __MEDIATEK_ADSP_COMMON_H__
+
+#define EXCEPT_MAX_HDR_SIZE    0x400
+#define MTK_ADSP_STACK_DUMP_SIZE 32
+
+void mtk_adsp_dump(struct snd_sof_dev *sdev, u32 flags);
+#endif