1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // Copyright 2020 NXP 4 // 5 // Common helpers for the audio DSP on i.MX8 6 7 #include <linux/module.h> 8 #include <sound/sof/xtensa.h> 9 #include "../ops.h" 10 11 #include "imx-common.h" 12 13 /** 14 * imx8_get_registers() - This function is called in case of DSP oops 15 * in order to gather information about the registers, filename and 16 * linenumber and stack. 17 * @sdev: SOF device 18 * @xoops: Stores information about registers. 19 * @panic_info: Stores information about filename and line number. 20 * @stack: Stores the stack dump. 21 * @stack_words: Size of the stack dump. 22 */ 23 void imx8_get_registers(struct snd_sof_dev *sdev, 24 struct sof_ipc_dsp_oops_xtensa *xoops, 25 struct sof_ipc_panic_info *panic_info, 26 u32 *stack, size_t stack_words) 27 { 28 u32 offset = sdev->dsp_oops_offset; 29 30 /* first read registers */ 31 sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops)); 32 33 /* then get panic info */ 34 if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) { 35 dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n", 36 xoops->arch_hdr.totalsize); 37 return; 38 } 39 offset += xoops->arch_hdr.totalsize; 40 sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info)); 41 42 /* then get the stack */ 43 offset += sizeof(*panic_info); 44 sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32)); 45 } 46 47 /** 48 * imx8_dump() - This function is called when a panic message is 49 * received from the firmware. 50 * @sdev: SOF device 51 * @flags: parameter not used but required by ops prototype 52 */ 53 void imx8_dump(struct snd_sof_dev *sdev, u32 flags) 54 { 55 struct sof_ipc_dsp_oops_xtensa xoops; 56 struct sof_ipc_panic_info panic_info; 57 u32 stack[IMX8_STACK_DUMP_SIZE]; 58 u32 status; 59 60 /* Get information about the panic status from the debug box area. 61 * Compute the trace point based on the status. 62 */ 63 sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4); 64 65 /* Get information about the registers, the filename and line 66 * number and the stack. 67 */ 68 imx8_get_registers(sdev, &xoops, &panic_info, stack, 69 IMX8_STACK_DUMP_SIZE); 70 71 /* Print the information to the console */ 72 snd_sof_get_status(sdev, status, status, &xoops, &panic_info, stack, 73 IMX8_STACK_DUMP_SIZE); 74 } 75 EXPORT_SYMBOL(imx8_dump); 76 77 MODULE_LICENSE("Dual BSD/GPL"); 78