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=========================
drm/amdgpu AMDgpu driver
=========================
The drm/amdgpu driver supports all AMD Radeon GPUs based on the Graphics Core
Next (GCN) architecture.
Module Parameters
=================
The amdgpu driver supports the following module parameters:
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
Core Driver Infrastructure
==========================
This section covers core driver infrastructure.
.. _amdgpu_memory_domains:
Memory Domains
--------------
.. kernel-doc:: include/uapi/drm/amdgpu_drm.h
:doc: memory domains
Buffer Objects
--------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
:doc: amdgpu_object
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
:internal:
PRIME Buffer Sharing
--------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
:doc: PRIME Buffer Sharing
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
:internal:
MMU Notifier
------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
:doc: MMU Notifier
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
:internal:
AMDGPU Virtual Memory
---------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
:doc: GPUVM
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
:internal:
Interrupt Handling
------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
:doc: Interrupt Handling
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
:internal:
AMDGPU XGMI Support
===================
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
:doc: AMDGPU XGMI Support
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
:internal:
AMDGPU RAS Support
==================
The AMDGPU RAS interfaces are exposed via sysfs (for informational queries) and
debugfs (for error injection).
RAS debugfs/sysfs Control and Error Injection Interfaces
--------------------------------------------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
:doc: AMDGPU RAS debugfs control interface
RAS Reboot Behavior for Unrecoverable Errors
--------------------------------------------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
:doc: AMDGPU RAS Reboot Behavior for Unrecoverable Errors
RAS Error Count sysfs Interface
-------------------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
:doc: AMDGPU RAS sysfs Error Count Interface
RAS EEPROM debugfs Interface
----------------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
:doc: AMDGPU RAS debugfs EEPROM table reset interface
RAS VRAM Bad Pages sysfs Interface
----------------------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
:doc: AMDGPU RAS sysfs gpu_vram_bad_pages Interface
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
:internal:
Sample Code
-----------
Sample code for testing error injection can be found here:
https://cgit.freedesktop.org/mesa/drm/tree/tests/amdgpu/ras_tests.c
This is part of the libdrm amdgpu unit tests which cover several areas of the GPU.
There are four sets of tests:
RAS Basic Test
The test verifies the RAS feature enabled status and makes sure the necessary sysfs and debugfs files
are present.
RAS Query Test
This test checks the RAS availability and enablement status for each supported IP block as well as
the error counts.
RAS Inject Test
This test injects errors for each IP.
RAS Disable Test
This test tests disabling of RAS features for each IP block.
GPU Power/Thermal Controls and Monitoring
=========================================
This section covers hwmon and power/thermal controls.
HWMON Interfaces
----------------
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: hwmon
GPU sysfs Power State Interfaces
--------------------------------
GPU power controls are exposed via sysfs files.
power_dpm_state
~~~~~~~~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: power_dpm_state
power_dpm_force_performance_level
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: power_dpm_force_performance_level
pp_table
~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: pp_table
pp_od_clk_voltage
~~~~~~~~~~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: pp_od_clk_voltage
pp_dpm_*
~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_fclk pp_dpm_dcefclk pp_dpm_pcie
pp_power_profile_mode
~~~~~~~~~~~~~~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: pp_power_profile_mode
*_busy_percent
~~~~~~~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: gpu_busy_percent
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: mem_busy_percent
gpu_metrics
~~~~~~~~~~~~~~~~~~~~~
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: gpu_metrics
GPU Product Information
=======================
Information about the GPU can be obtained on certain cards
via sysfs
product_name
------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
:doc: product_name
product_number
--------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
:doc: product_name
serial_number
-------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
:doc: serial_number
unique_id
---------
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: unique_id
GPU Memory Usage Information
============================
Various memory accounting can be accessed via sysfs
mem_info_vram_total
-------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
:doc: mem_info_vram_total
mem_info_vram_used
------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
:doc: mem_info_vram_used
mem_info_vis_vram_total
-----------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
:doc: mem_info_vis_vram_total
mem_info_vis_vram_used
----------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
:doc: mem_info_vis_vram_used
mem_info_gtt_total
------------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
:doc: mem_info_gtt_total
mem_info_gtt_used
-----------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
:doc: mem_info_gtt_used
PCIe Accounting Information
===========================
pcie_bw
-------
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: pcie_bw
pcie_replay_count
-----------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
:doc: pcie_replay_count
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