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From: Dave Airlie <airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
Cc: shawn.starr-bJEeYj9oJeDQT0dZR+AlfA@public.gmane.org
Subject: [rfc] fix for regression in pat memory tracking in 4.9-rc1
Date: Tue, 18 Oct 2016 16:13:10 +1000	[thread overview]
Message-ID: <1476771193-2759-1-git-send-email-airlied@gmail.com> (raw)

Okay I spent some time looking into it, and this is the result.

We have to manually insert the VRAM BAR into the pat memory tracking
table as WC. The only other way things get inserted are via ioremap,
which we never do for the whole VRAM BAR. We could in theory map
the VRAM BAR using the iomap stuff that i915 uses, but we don't
and this seems easier for now.

We have to fix up at least nouveau and radeon I think as well.

Dave.

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             reply	other threads:[~2016-10-18  6:13 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-18  6:13 Dave Airlie [this message]
2016-10-18  6:13 ` [PATCH 1/3] x86/pat: export io memory reserve/free api Dave Airlie
     [not found]   ` <1476771193-2759-2-git-send-email-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-10-18  7:22     ` Edward O'Callaghan
     [not found]       ` <d5dcf484-d760-8fe6-bc00-4d6db3ef9d05-dczkZgxz+BNUPWh3PAxdjQ@public.gmane.org>
2016-10-18  8:29         ` Dave Airlie
     [not found]           ` <CAPM=9tx2iBaHt-bg_WjUHE3wPprs2GvNt1LZNLngF-GLH2U_Zw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-18 12:31             ` Edward O'Callaghan
2016-10-22 22:15     ` Shawn Starr
     [not found] ` <1476771193-2759-1-git-send-email-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-10-18  6:13   ` [PATCH 2/3] drm/ttm: add API to reserve/free WC memory Dave Airlie
2016-10-18  6:13   ` [PATCH 3/3] amdgpu: reserve VRAM ranges in PAT memtype tables Dave Airlie
2016-10-18  7:51 ` [rfc] fix for regression in pat memory tracking in 4.9-rc1 Daniel Vetter

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