[EXTERNAL] [PATCH 2/2] drm/amdkfd: Add PCIe Hotplug Support for AMDKFD

[Andrey Grodzovsky]

I retested hot plug tests at the commit I mentioned bellow - looks ok, 
my ASIC is Navi 10, I also tested using Vega 10 and older Polaris ASICs 
(whatever i had at home at the time). It's possible there are extra 
issues in ASICs like ur which I didn't cover during tests.

andrey at andrey-test:~/drm$ sudo ./build/tests/amdgpu/amdgpu_test -s 13
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory


The ASIC NOT support UVD, suite disabled
/usr/local/share/libdrm/amdgpu.ids: No such file or directory


The ASIC NOT support VCE, suite disabled
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory


The ASIC NOT support UVD ENC, suite disabled.
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory


Don't support TMZ (trust memory zone), security suite disabled
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
/usr/local/share/libdrm/amdgpu.ids: No such file or directory
Peer device is not opened or has ASIC not supported by the suite, skip 
all Peer to Peer tests.


      CUnit - A unit testing framework for C - Version 2.1-3
http://cunit.sourceforge.net/


*Suite: Hotunplug Tests**
**  Test: Unplug card and rescan the bus to plug it back 
.../usr/local/share/libdrm/amdgpu.ids: No such file or directory**
**passed**
**  Test: Same as first test but with command submission 
.../usr/local/share/libdrm/amdgpu.ids: No such file or directory**
**passed**
**  Test: Unplug with exported bo .../usr/local/share/libdrm/amdgpu.ids: 
No such file or directory**
**passed*

Run Summary:    Type  Total    Ran Passed Failed Inactive
               suites     14      1    n/a      0        0
                tests     71      3      3      0        1
              asserts     21     21     21      0      n/a

Elapsed time =    9.195 seconds


Andrey

On 2022-04-20 11:44, Andrey Grodzovsky wrote:
>
> The only one in Radeon 7 I see is the same sysfs crash we already 
> fixed so you can use the same fix. The MI 200 issue i haven't seen yet 
> but I also haven't tested MI200 so never saw it before. Need to test 
> when i get the time.
>
> So try that fix with Radeon 7 again to see if you pass the tests (the 
> warnings should all be minor issues).
>
> Andrey
>
>
> On 2022-04-20 05:24, Shuotao Xu wrote:
>>>
>>> That a problem, latest working baseline I tested and confirmed 
>>> passing hotplug tests is this branch and commit 
>>> https://gitlab.freedesktop.org/agd5f/linux/-/commit/86e12a53b73135806e101142e72f3f1c0e6fa8e6 
>>> which is amd-staging-drm-next. 5.14 was the branch we ups-reamed the 
>>> hotplug code but it had a lot of regressions over time due to new 
>>> changes (that why I added the hotplug test to try and catch them 
>>> early). It would be best to run this branch on mi-100 so we have a 
>>> clean baseline and only after confirming  this particular branch 
>>> from this commits passes libdrm tests only then start adding the KFD 
>>> specific addons. Another option if you can't work with MI-100 and 
>>> this branch is to try a different ASIC that does work with this 
>>> branch (if possible).
>>>
>>> Andrey
>>>
>> OK I tried both this commit and the HEAD of and-staging-drm-next on 
>> two GPUs( MI100 and Radeon VII) both did not pass hotplugout libdrm 
>> test. I might be able to gain access to MI200, but I suspect it would 
>> work.
>>
>> I copied the complete dmesgs as follows. I highlighted the OOPSES for 
>> you.
>>
>> Radeon VII:
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