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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)2//3// This file is provided under a dual BSD/GPLv2 license. When using or4// redistributing this file, you may do so under either license.5//6// Copyright(c) 2022 MediaTek Inc. All rights reserved.7//8// Author: YC Hung <yc.hung@mediatek.com>9 10/*11 * Common helpers for the audio DSP on MediaTek platforms12 */13 14#include <linux/module.h>15#include <sound/sof/xtensa.h>16#include "../ops.h"17#include "mtk-adsp-common.h"18 19/**20 * mtk_adsp_get_registers() - This function is called in case of DSP oops21 * in order to gather information about the registers, filename and22 * linenumber and stack.23 * @sdev: SOF device24 * @xoops: Stores information about registers.25 * @panic_info: Stores information about filename and line number.26 * @stack: Stores the stack dump.27 * @stack_words: Size of the stack dump.28 */29static void mtk_adsp_get_registers(struct snd_sof_dev *sdev,30 struct sof_ipc_dsp_oops_xtensa *xoops,31 struct sof_ipc_panic_info *panic_info,32 u32 *stack, size_t stack_words)33{34 u32 offset = sdev->dsp_oops_offset;35 36 /* first read registers */37 sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));38 39 /* then get panic info */40 if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {41 dev_err(sdev->dev, "invalid header size 0x%x\n",42 xoops->arch_hdr.totalsize);43 return;44 }45 offset += xoops->arch_hdr.totalsize;46 sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));47 48 /* then get the stack */49 offset += sizeof(*panic_info);50 sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));51}52 53/**54 * mtk_adsp_dump() - This function is called when a panic message is55 * received from the firmware.56 * @sdev: SOF device57 * @flags: parameter not used but required by ops prototype58 */59void mtk_adsp_dump(struct snd_sof_dev *sdev, u32 flags)60{61 char *level = (flags & SOF_DBG_DUMP_OPTIONAL) ? KERN_DEBUG : KERN_ERR;62 struct sof_ipc_dsp_oops_xtensa xoops;63 struct sof_ipc_panic_info panic_info = {};64 u32 stack[MTK_ADSP_STACK_DUMP_SIZE];65 u32 status;66 67 /* Get information about the panic status from the debug box area.68 * Compute the trace point based on the status.69 */70 sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4);71 72 /* Get information about the registers, the filename and line73 * number and the stack.74 */75 mtk_adsp_get_registers(sdev, &xoops, &panic_info, stack,76 MTK_ADSP_STACK_DUMP_SIZE);77 78 /* Print the information to the console */79 sof_print_oops_and_stack(sdev, level, status, status, &xoops, &panic_info,80 stack, MTK_ADSP_STACK_DUMP_SIZE);81}82EXPORT_SYMBOL(mtk_adsp_dump);83 84MODULE_LICENSE("Dual BSD/GPL");85MODULE_DESCRIPTION("SOF helpers for MTK ADSP platforms");86