forked from Minki/linux
43a56687d1
Add the contents of each ringbuffer to the GPU state and dump the data in the crash file encoded with ascii85. To save space only the used portions of the ringbuffer are dumped. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
79 lines
1.9 KiB
ReStructuredText
79 lines
1.9 KiB
ReStructuredText
=====================
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MSM Crash Dump Format
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=====================
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Following a GPU hang the MSM driver outputs debugging information via
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/sys/kernel/dri/X/show or via devcoredump (/sys/class/devcoredump/dcdX/data).
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This document describes how the output is formatted.
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Each entry is in the form key: value. Sections headers will not have a value
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and all the contents of a section will be indented two spaces from the header.
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Each section might have multiple array entries the start of which is designated
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by a (-).
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Mappings
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--------
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kernel
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The kernel version that generated the dump (UTS_RELEASE).
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module
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The module that generated the crashdump.
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time
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The kernel time at crash formated as seconds.microseconds.
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comm
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Comm string for the binary that generated the fault.
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cmdline
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Command line for the binary that generated the fault.
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revision
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ID of the GPU that generated the crash formatted as
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core.major.minor.patchlevel separated by dots.
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rbbm-status
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The current value of RBBM_STATUS which shows what top level GPU
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components are in use at the time of crash.
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ringbuffer
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Section containing the contents of each ringbuffer. Each ringbuffer is
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identified with an id number.
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id
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Ringbuffer ID (0 based index). Each ringbuffer in the section
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will have its own unique id.
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iova
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GPU address of the ringbuffer.
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last-fence
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The last fence that was issued on the ringbuffer
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retired-fence
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The last fence retired on the ringbuffer.
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rptr
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The current read pointer (rptr) for the ringbuffer.
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wptr
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The current write pointer (wptr) for the ringbuffer.
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size
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Maximum size of the ringbuffer programmed in the hardware.
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data
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The contents of the ring encoded as ascii85. Only the used
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portions of the ring will be printed.
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registers
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Set of registers values. Each entry is on its own line enclosed
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by brackets { }.
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offset
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Byte offset of the register from the start of the
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GPU memory region.
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value
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Hexadecimal value of the register.
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