Only example of usage and header for now.
Signed-off-by: Sam Protsenko <[email protected]>
---
.../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@130c0000 {
+ 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
On 20/01/2022 21:19, Sam Protsenko wrote:
> Only example of usage and header for now.
>
> Signed-off-by: Sam Protsenko <[email protected]>
> ---
> .../bindings/iommu/samsung,sysmmu-v8.txt | 31 +++++++++++++
Please, don't copy paste bindings or entire drviers from vendor kernel.
It looks very bad. Instead, submit them in dtschema.
NAK.
> 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@130c0000 {
> + 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>;
We try not to store dead code in kernel.
Best regards,
Krzysztof