From: "Terje Bergström" <tbergstrom-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
To: Alexandre Courbot
<acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Alexandre Courbot
<gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Subject: Re: [PATCH v4 05/12] memory: Add NVIDIA Tegra memory controller support
Date: Thu, 30 Oct 2014 12:18:37 +0200 [thread overview]
Message-ID: <5452107D.8080207@nvidia.com> (raw)
In-Reply-To: <54520CFE.9060907-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
On 30.10.2014 12:03, Alexandre Courbot wrote:
> I had to change the .reg of TEGRA_SWGROUP_GPU to 0xaac to get the IOMMU
> to work with GK20A. The reason is still not completely clear to me, but
> if you look at the TRM you see that 0xaa8 is basically constant, with
> the SMMU translation bit hardcoded to DISABLE (and the ASID field being
> meaningless in that case). However right after that register you have a
> functional one named GPUB instead of GPU, and this one is fully
> writeable (and has the expected effect).
GPU has two SW group IDs, because it accesses memory both with and
without translation. The bit 34 in addresses in f.ex. PTE chooses
between the two.
GPU is hard-wired to disable translation. For GPUB translation can be
enabled.
Terje
next prev parent reply other threads:[~2014-10-30 10:18 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-13 10:33 [PATCH v3 01/12] clk: tegra: Implement memory-controller clock Thierry Reding
[not found] ` <1413196434-5292-1-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-13 10:33 ` [PATCH 02/12] amba: Add Kconfig file Thierry Reding
2014-10-13 10:33 ` [PATCH v4 03/12] ARM: tegra: Move AHB Kconfig to drivers/amba Thierry Reding
2014-10-13 10:33 ` [PATCH 04/12] of: Add NVIDIA Tegra memory controller binding Thierry Reding
2014-10-13 10:33 ` [PATCH v4 05/12] memory: Add NVIDIA Tegra memory controller support Thierry Reding
[not found] ` <1413196434-5292-5-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-15 22:05 ` Olof Johansson
[not found] ` <CAOesGMjMcqa_wE7rfA42QyvF7yxAkgjEN+-0UVMuErnjHr4zkA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 15:32 ` Thierry Reding
2014-10-15 22:09 ` Olof Johansson
[not found] ` <CAOesGMgDE_PZHrrEhntnce2AMsdtAb9+i5XuxP-Q7j--432zpw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 15:08 ` Thierry Reding
[not found] ` <20141030150839.GG20072-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2014-10-31 13:27 ` Thierry Reding
[not found] ` <20141031132740.GA9371-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2014-11-01 5:38 ` Alexandre Courbot
[not found] ` <CAAVeFuKgMAF4LML5G=2k00No4AKDj7MTHB6ByXEvPzaSsAPUXg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-03 8:22 ` Thierry Reding
[not found] ` <20141103082201.GC21002-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2014-11-03 8:40 ` Alexandre Courbot
2014-10-30 10:03 ` Alexandre Courbot
[not found] ` <54520CFE.9060907-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-10-30 10:18 ` Terje Bergström [this message]
[not found] ` <5452107D.8080207-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-10-30 10:22 ` Alexandre Courbot
[not found] ` <54521181.8080005-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-10-30 11:04 ` Terje Bergström
[not found] ` <54521B22.6070708-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-10-30 13:35 ` Alexandre Courbot
[not found] ` <54523E8B.7000900-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-10-30 13:47 ` Terje Bergström
[not found] ` <5452418F.8080005-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-10-30 14:56 ` Thierry Reding
2014-10-13 10:33 ` [PATCH 06/12] ARM: tegra: Add memory controller support for Tegra20 Thierry Reding
[not found] ` <1413196434-5292-6-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-17 17:43 ` David Riley
[not found] ` <CAASgrz3Z2vW0L+u5kju9bAh-R4PnreMnhoGaKY_UwSTGFcBshA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 14:45 ` Thierry Reding
2014-10-13 10:33 ` [PATCH 07/12] ARM: tegra: Add memory controller support for Tegra30 Thierry Reding
2014-10-13 10:33 ` [PATCH 08/12] ARM: tegra: Add memory controller support for Tegra114 Thierry Reding
2014-10-13 10:33 ` [PATCH 09/12] ARM: tegra: Add memory controller support for Tegra124 Thierry Reding
2014-10-13 10:33 ` [PATCH 10/12] ARM: tegra: Enable IOMMU for display controllers on Tegra30 Thierry Reding
2014-10-13 10:33 ` [PATCH 11/12] ARM: tegra: Enable IOMMU for display controllers on Tegra114 Thierry Reding
2014-10-13 10:33 ` [PATCH 12/12] ARM: tegra: Enable IOMMU for display controllers on Tegra124 Thierry Reding
2014-10-20 11:02 ` [PATCH v3 01/12] clk: tegra: Implement memory-controller clock Tomeu Vizoso
[not found] ` <CAAObsKB0ozbOy8ZzgbEyf-SrqF5jpfHUXCJdAMiqgS78DAyaVA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 14:57 ` Thierry Reding
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