Commit 1c1e53f7 authored by Tom St Denis's avatar Tom St Denis Committed by Alex Deucher

drm/amd/doc: Add XGMI sysfs documentation

Acked-by: default avatarSlava Abramov <slava.abramov@amd.com>
Signed-off-by: default avatarTom St Denis <tom.stdenis@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent f1e5e913
......@@ -70,6 +70,15 @@ 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:
GPU Power/Thermal Controls and Monitoring
=========================================
......
......@@ -40,6 +40,34 @@ void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive)
return &hive->device_list;
}
/**
* DOC: AMDGPU XGMI Support
*
* XGMI is a high speed interconnect that joins multiple GPU cards
* into a homogeneous memory space that is organized by a collective
* hive ID and individual node IDs, both of which are 64-bit numbers.
*
* The file xgmi_device_id contains the unique per GPU device ID and
* is stored in the /sys/class/drm/card${cardno}/device/ directory.
*
* Inside the device directory a sub-directory 'xgmi_hive_info' is
* created which contains the hive ID and the list of nodes.
*
* The hive ID is stored in:
* /sys/class/drm/card${cardno}/device/xgmi_hive_info/xgmi_hive_id
*
* The node information is stored in numbered directories:
* /sys/class/drm/card${cardno}/device/xgmi_hive_info/node${nodeno}/xgmi_device_id
*
* Each device has their own xgmi_hive_info direction with a mirror
* set of node sub-directories.
*
* The XGMI memory space is built by contiguously adding the power of
* two padded VRAM space from each node to each other.
*
*/
static ssize_t amdgpu_xgmi_show_hive_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment