Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

On Mon, 2024-06-17 at 22:30 +0800, Icenowy Zheng wrote: > > Two consecutive writes to the same bus address are perfectly legal > > from > > the PCIe specification and can happen all the time, even without this > > specific hw workaround. > > Yes I know it, and I am not from Loongson, just some us

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 18:09 schrieb Icenowy Zheng: BTW is there any operation that could be taken to examine this specific workaround? Is there any case possible to reproduce? No idea, I mean that's for GFX7/8 which was released between 2013 and 2017. My educated guess is that you could create a tes

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

在 2024-06-17星期一的 15:59 +0200，Christian König写道： > Am 17.06.24 um 15:43 schrieb Icenowy Zheng: > > 在 2024-06-17星期一的 15:09 +0200，Christian König写道： > > > Am 17.06.24 um 15:03 schrieb Icenowy Zheng: > > > > 在 2024-06-17星期一的 14:35 +0200，Christian König写道： > > > > > Am 17.06.24 um 12:58 schrieb Icenowy

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 17:35 schrieb Xi Ruoyao: On Mon, 2024-06-17 at 22:30 +0800, Icenowy Zheng wrote: Two consecutive writes to the same bus address are perfectly legal from the PCIe specification and can happen all the time, even without this specific hw workaround. Yes I know it, and I am not from

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 16:57 schrieb Icenowy Zheng: 在 2024-06-17星期一的 16:42 +0200，Christian König写道： Am 17.06.24 um 16:30 schrieb Icenowy Zheng: 在 2024-06-17星期一的 15:59 +0200，Christian König写道： Am 17.06.24 um 15:43 schrieb Icenowy Zheng: 在 2024-06-17星期一的 15:09 +0200，Christian König写道： ... In this cas

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

在 2024-06-17星期一的 16:42 +0200，Christian König写道： > Am 17.06.24 um 16:30 schrieb Icenowy Zheng: > > 在 2024-06-17星期一的 15:59 +0200，Christian König写道： > > > Am 17.06.24 um 15:43 schrieb Icenowy Zheng: > > > > 在 2024-06-17星期一的 15:09 +0200，Christian König写道： > > > > > Am 17.06.24 um 15:03 schrieb Icenowy

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 16:30 schrieb Icenowy Zheng: 在 2024-06-17星期一的 15:59 +0200，Christian König写道： Am 17.06.24 um 15:43 schrieb Icenowy Zheng: 在 2024-06-17星期一的 15:09 +0200，Christian König写道： Am 17.06.24 um 15:03 schrieb Icenowy Zheng: 在 2024-06-17星期一的 14:35 +0200，Christian König写道： Am 17.06.24 um 1

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

在 2024-06-17星期一的 15:59 +0200，Christian König写道： > Am 17.06.24 um 15:43 schrieb Icenowy Zheng: > > 在 2024-06-17星期一的 15:09 +0200，Christian König写道： > > > Am 17.06.24 um 15:03 schrieb Icenowy Zheng: > > > > 在 2024-06-17星期一的 14:35 +0200，Christian König写道： > > > > > Am 17.06.24 um 12:58 schrieb Icenowy

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 15:43 schrieb Icenowy Zheng: 在 2024-06-17星期一的 15:09 +0200，Christian König写道： Am 17.06.24 um 15:03 schrieb Icenowy Zheng: 在 2024-06-17星期一的 14:35 +0200，Christian König写道： Am 17.06.24 um 12:58 schrieb Icenowy Zheng: The duplication of EOP packets for GFX7/8, with the former one ha

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

在 2024-06-17星期一的 15:09 +0200，Christian König写道： > Am 17.06.24 um 15:03 schrieb Icenowy Zheng: > > 在 2024-06-17星期一的 14:35 +0200，Christian König写道： > > > Am 17.06.24 um 12:58 schrieb Icenowy Zheng: > > > > The duplication of EOP packets for GFX7/8, with the former one > > > > have > > > > seq-1 writt

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 15:03 schrieb Icenowy Zheng: 在 2024-06-17星期一的 14:35 +0200，Christian König写道： Am 17.06.24 um 12:58 schrieb Icenowy Zheng: The duplication of EOP packets for GFX7/8, with the former one have seq-1 written and the latter one have seq written, seems to confuse some hardware platform

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

在 2024-06-17星期一的 14:35 +0200，Christian König写道： > Am 17.06.24 um 12:58 schrieb Icenowy Zheng: > > The duplication of EOP packets for GFX7/8, with the former one have > > seq-1 written and the latter one have seq written, seems to confuse > > some > > hardware platform (e.g. Loongson 7A series PCIe

Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

Am 17.06.24 um 12:58 schrieb Icenowy Zheng: The duplication of EOP packets for GFX7/8, with the former one have seq-1 written and the latter one have seq written, seems to confuse some hardware platform (e.g. Loongson 7A series PCIe controllers). Make the content of the duplicated EOP packet the

[PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content

The duplication of EOP packets for GFX7/8, with the former one have seq-1 written and the latter one have seq written, seems to confuse some hardware platform (e.g. Loongson 7A series PCIe controllers). Make the content of the duplicated EOP packet the same with the real one, only masking any poss