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Message-Id: <20220120201958.2649-2-semen.protsenko@linaro.org>
Date: Thu, 20 Jan 2022 22:19:56 +0200
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc: Sumit Semwal <sumit.semwal@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Cho KyongHo <pullip.cho@...sung.com>,
Hyesoo Yu <hyesoo.yu@...sung.com>,
Janghyuck Kim <janghyuck.kim@...sung.com>,
Jinkyu Yang <jinkyu1.yang@...sung.com>,
Alex <acnwigwe@...gle.com>, Carlos Llamas <cmllamas@...gle.com>,
Daniel Mentz <danielmentz@...gle.com>,
Erick Reyes <erickreyes@...gle.com>,
"J . Avila" <elavila@...gle.com>, Jonglin Lee <jonglin@...gle.com>,
Mark Salyzyn <salyzyn@...gle.com>,
Thierry Strudel <tstrudel@...gle.com>,
Will McVicker <willmcvicker@...gle.com>,
Shawn Guo <shawnguo@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
linux-samsung-soc@...r.kernel.org,
iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [RFC 1/3] dt-bindings: iommu: Add bindings for samsung,sysmmu-v8
Only example of usage and header for now.
Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
.../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 <dt-bindings/soc/samsung,sysmmu-v8.h>
+
+ /* IOMMU group info */
+ iommu_group_dpu: iommu_group_dpu {
+ compatible = "samsung,sysmmu-group";
+ };
+
+ sysmmu_dpu: sysmmu@...c0000 {
+ compatible = "samsung,sysmmu-v8";
+ reg = <0x130c0000 0x9000>;
+ interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
+ qos = <15>;
+
+ clocks = <&cmu_dpu CLK_GOUT_DPU_SMMU_CLK>;
+ clock-names = "gate";
+
+ sysmmu,secure-irq;
+ sysmmu,secure_base = <0x130d0000>;
+ sysmmu,default_tlb = <TLB_CFG(BL1, PREFETCH_PREDICTION)>;
+ 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 */
--
2.30.2
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