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 or 4 // 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 platforms 12 */ 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 oops 21 * in order to gather information about the registers, filename and 22 * linenumber and stack. 23 * @sdev: SOF device 24 * @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 */ 29 static 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 is 55 * received from the firmware. 56 * @sdev: SOF device 57 * @flags: parameter not used but required by ops prototype 58 */ 59 void 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 line 73 * 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 } 82 EXPORT_SYMBOL(mtk_adsp_dump); 83 84 MODULE_LICENSE("Dual BSD/GPL"); 85