| # Copyright (c) 2021 Advanced Micro Devices, Inc. |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are met: |
| # |
| # 1. Redistributions of source code must retain the above copyright notice, |
| # this list of conditions and the following disclaimer. |
| # |
| # 2. Redistributions in binary form must reproduce the above copyright notice, |
| # this list of conditions and the following disclaimer in the documentation |
| # and/or other materials provided with the distribution. |
| # |
| # 3. Neither the name of the copyright holder nor the names of its |
| # contributors may be used to endorse or promote products derived from this |
| # software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| # POSSIBILITY OF SUCH DAMAGE. |
| |
| |
| # This script collects the MMIO trace during initialization of GPU driver. |
| # Before running this, we need to disable the drm module in use. |
| # For AMD GPUs do either: |
| # echo 'blacklist amdgpu' >> /etc/modprobe.d/blacklist.conf |
| # or |
| # add 'modprobe.blacklist=amdgpu' to your kernel command |
| # And then reboot. |
| |
| # First load the drm_kms_helper with fbdev_emulation=0 |
| modprobe drm_kms_helper fbdev_emulation=0 |
| |
| # Path to store the trace |
| TRACE_PATH="MMIO.trace" |
| |
| # Choose propoer size to make sure you won’t miss any events |
| BUFFER_SIZE=8000 |
| |
| DRM_MODULE="amdgpu" |
| DRM_MODULE_ARGS="ip_block_mask=0xff" |
| |
| # Setup MMIO tracer |
| echo $BUFFER_SIZE > /sys/kernel/debug/tracing/buffer_size_kb |
| echo mmiotrace > /sys/kernel/debug/tracing/current_tracer |
| |
| # Re-direct the output to a file, process in background |
| cat /sys/kernel/debug/tracing/trace_pipe > $TRACE_PATH & |
| # Save the process ID, as we need to kill it later on |
| PID=$! |
| |
| # Insert the module, start driver initialization |
| echo "Running: modprobe -v $DRM_MODULE $DRM_MODULE_ARGS" |
| modprobe -v $DRM_MODULE $DRM_MODULE_ARGS |
| |
| # Kill the background process after module is loaded |
| kill $PID |
