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<div>GFX9 will not be supported.</div>
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<div>Thanks,</div>
<div>Jian-Rong Jin</div>
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在 2018年8月15日，下午8:33，Jakub Okoński <<a href="mailto:jakub@okonski.org">jakub@okonski.org</a>> 写道：<br>
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<div>Hey Jian-Rong,</div>
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<div>Will gfx9 get support from KMD and LLPC by the time gfx10 releases, or is it only going to be a gfx10-and-forward feature?</div>
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<div>If not, is there something missing in gfx9 hardware? Are you allowed to say?<br>
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<div>Thanks,</div>
<div>Jakub<br>
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<div dir="ltr">On Wed, 15 Aug 2018 at 08:36 Jin, Jian-Rong <<a href="mailto:Jian-Rong.Jin@amd.com" target="_blank">Jian-Rong.Jin@amd.com</a>> wrote:<br>
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Hi Jakub。<br>
Both KMD and LLPC are not ready to support NGG for gfx9. We are going to support NGG in amdvlk for next generation GPU.<br>
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Thanks<br>
Jian-Rong JIN<br>
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-----Original Message-----<br>
From: amd-gfx <<a href="mailto:amd-gfx-bounces@lists.freedesktop.org" target="_blank">amd-gfx-bounces@lists.freedesktop.org</a>> On Behalf Of Jakub Okoński<br>
Sent: 2018年8月14日 21:31<br>
To: <a href="mailto:amd-gfx@lists.freedesktop.org" target="_blank">amd-gfx@lists.freedesktop.org</a><br>
Subject: Making a GDS Allocation for NGG<br>
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Hi folks,<br>
<br>
I was trying to play around with NGG on Vega using the open source AMDVLK stack.<br>
After fetching all the code, I disabled an override in PAL, under gfx9SettingsLoader.cpp that disables the NGG setting. I've put a new option in my<br>
amdPalSettings.cfg: `NggMode,7` and that was enough to enable it.<br>
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When I ran a small vulkan application, it crashed with a "Not implemented" error in Pal::Linux::Device::AllocateGds. The comment there says:<br>
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// TODO: implement it once amdgpu is ready.<br>
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I couldn't find anything specific to GDS allocation in upstream kernel, so I looked at agd5f/amd-staging-drm-next and found some code related to AMDGPU_GEM_DOMAIN_GDS and allocating a bo object. This is in amdgpu_gem_create_ioctl, so I think it's accessible
to userspace, with a small change in libdrm, probably.<br>
<br>
Is this what is needed to make a GDS allocation that NGG would accept, or is it unrelated? Do you know if there are any other blockers for NGG besides this?<br>
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Regards,<br>
Jakub<br>
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