linux-kernel - [PATCH 3/3] arm64: dts: mt8183: use restricted swiotlb for scp mem

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Message-Id: <20211123112104.3530135-4-hsinyi@chromium.org>
Date:   Tue, 23 Nov 2021 19:21:04 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime@...no.tech>,
        - <devicetree-spec@...r.kernel.org>, devicetree@...r.kernel.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, senozhatsky@...omium.org,
        tfiga@...omium.org
Subject: [PATCH 3/3] arm64: dts: mt8183: use restricted swiotlb for scp mem

Use restricted-dma-pool for mtk_scp's reserved memory. And set the
io-tlb-segsize to 4096 since the driver needs at least 2560 slabs to
allocate memory.

Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
---
 arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index 94c13c45919445..de94b2fd7f33e7 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -109,9 +109,9 @@ reserved_memory: reserved-memory {
 		ranges;
 
 		scp_mem_reserved: scp_mem_region {
-			compatible = "shared-dma-pool";
+			compatible = "restricted-dma-pool";
 			reg = <0 0x50000000 0 0x2900000>;
-			no-map;
+			io-tlb-segsize = <4096>;
 		};
 	};
 
-- 
2.34.0.rc2.393.gf8c9666880-goog