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  */
  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");