LXR linux/sound/soc/sof/imx/imx-common.c

   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 */
  23void 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 */
  53void 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}
  75EXPORT_SYMBOL(imx8_dump);
  76
  77MODULE_LICENSE("Dual BSD/GPL");
  78