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Avila" , Jonglin Lee , Mark Salyzyn , Thierry Strudel , Will McVicker , Shawn Guo , Bjorn Andersson , linux-samsung-soc@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [RFC 1/3] dt-bindings: iommu: Add bindings for samsung,sysmmu-v8 Date: Thu, 20 Jan 2022 22:19:56 +0200 Message-Id: <20220120201958.2649-2-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220120201958.2649-1-semen.protsenko@linaro.org> References: <20220120201958.2649-1-semen.protsenko@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220120_122003_388556_3B279013 X-CRM114-Status: GOOD ( 16.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Only example of usage and header for now. Signed-off-by: Sam Protsenko --- .../bindings/iommu/samsung,sysmmu-v8.txt | 31 +++++++++++++ include/dt-bindings/soc/samsung,sysmmu-v8.h | 43 +++++++++++++++++++ 2 files changed, 74 insertions(+) create mode 100644 Documentation/devicetree/bindings/iommu/samsung,sysmmu-v8.txt create mode 100644 include/dt-bindings/soc/samsung,sysmmu-v8.h diff --git a/Documentation/devicetree/bindings/iommu/samsung,sysmmu-v8.txt b/Documentation/devicetree/bindings/iommu/samsung,sysmmu-v8.txt new file mode 100644 index 000000000000..d6004ea4a746 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/samsung,sysmmu-v8.txt @@ -0,0 +1,31 @@ +Example (Exynos850, IOMMU for DPU usage): + + #include + + /* IOMMU group info */ + iommu_group_dpu: iommu_group_dpu { + compatible = "samsung,sysmmu-group"; + }; + + sysmmu_dpu: sysmmu@130c0000 { + compatible = "samsung,sysmmu-v8"; + reg = <0x130c0000 0x9000>; + interrupts = , + ; + qos = <15>; + + clocks = <&cmu_dpu CLK_GOUT_DPU_SMMU_CLK>; + clock-names = "gate"; + + sysmmu,secure-irq; + sysmmu,secure_base = <0x130d0000>; + sysmmu,default_tlb = ; + sysmmu,tlb_property = + <1 TLB_CFG(BL1, PREFETCH_PREDICTION) (DIR_READ | (1 << 16)) SYSMMU_ID_MASK(0x2, 0xF)>, + <2 TLB_CFG(BL1, PREFETCH_PREDICTION) (DIR_READ | (1 << 16)) SYSMMU_ID_MASK(0x4, 0xF)>, + <3 TLB_CFG(BL1, PREFETCH_PREDICTION) (DIR_READ | (1 << 16)) SYSMMU_ID_MASK(0x6, 0xF)>, + <4 TLB_CFG(BL1, PREFETCH_PREDICTION) (DIR_READ | (1 << 16)) SYSMMU_ID_MASK(0x8, 0xF)>; + port-name = "DPU"; + #iommu-cells = <0>; + //power-domains = <&pd_dpu>; + }; diff --git a/include/dt-bindings/soc/samsung,sysmmu-v8.h b/include/dt-bindings/soc/samsung,sysmmu-v8.h new file mode 100644 index 000000000000..2d422e05dae1 --- /dev/null +++ b/include/dt-bindings/soc/samsung,sysmmu-v8.h @@ -0,0 +1,43 @@ +/* + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Device Tree binding constants for Exynos System MMU. + */ + +#ifndef _DT_BINDINGS_SAMSUNG_SYSMMU_V8_H +#define _DT_BINDINGS_SAMSUNG_SYSMMU_V8_H + +/* define for fetchsize in TLB_CFG */ +#define BL1 (0x0 << 5) +#define BL2 (0x1 << 5) +#define BL4 (0x2 << 5) +#define BL8 (0x3 << 5) +#define BL16 (0x4 << 5) +#define BL32 (0x5 << 5) +#define BL64 (0x6 << 5) + +/* define for prefetch in TLB_CFG */ +#define PREFETCH_NONE (0x0 << 1) +#define PREFETCH_DESCENDING (0x1 << 1) +#define PREFETCH_ASCENDING (0x3 << 1) +#define PREFETCH_PREDICTION (0x5 << 1) + +/* combine fetchsize and prefetch */ +#define TLB_CFG(fetchsize, prefetch) (fetchsize | prefetch) +#define TLB_CFG_DEFAULT 0x0 + +/* define for direction in TLB_MATCH_CFG */ +#define DIR_NONE (0x0 << 8) +#define DIR_READ (0x1 << 8) +#define DIR_WRITE (0x2 << 8) +#define DIR_RW (0x3 << 8) + +/* define for TLB_MATCH_SID */ +#define SYSMMU_ID_MASK(id,mask) ((mask) << 16 | (id)) +#define SYSMMU_NOID 0 + +#endif /* _DT_BINDINGS_SAMSUNG_SYSMMU_V8_H */