From: Sven Peter via iommu <iommu@lists.linux-foundation.org>
To: iommu@lists.linux-foundation.org
Cc: Arnd Bergmann <arnd@kernel.org>,
devicetree@vger.kernel.org, Will Deacon <will@kernel.org>,
Hector Martin <marcan@marcan.st>,
linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Sven Peter <sven@svenpeter.dev>, Marc Zyngier <maz@kernel.org>,
Mohamed Mediouni <mohamed.mediouni@caramail.com>,
Stan Skowronek <stan@corellium.com>,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org,
Mark Kettenis <mark.kettenis@xs4all.nl>
Subject: [PATCH 2/3] dt-bindings: iommu: add DART iommu bindings
Date: Sat, 20 Mar 2021 15:20:08 +0000 [thread overview]
Message-ID: <20210320151903.60759-3-sven@svenpeter.dev> (raw)
In-Reply-To: <20210320151903.60759-1-sven@svenpeter.dev>
DART (Device Address Resolution Table) is the iommu found on Apple
ARM SoCs such as the M1.
Signed-off-by: Sven Peter <sven@svenpeter.dev>
---
.../bindings/iommu/apple,t8103-dart.yaml | 82 +++++++++++++++++++
MAINTAINERS | 6 ++
2 files changed, 88 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iommu/apple,t8103-dart.yaml
diff --git a/Documentation/devicetree/bindings/iommu/apple,t8103-dart.yaml b/Documentation/devicetree/bindings/iommu/apple,t8103-dart.yaml
new file mode 100644
index 000000000000..2ec2d905a2ea
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/apple,t8103-dart.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/apple,t8103-dart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple DART IOMMU Implementation
+
+maintainers:
+ - Sven Peter <sven@svenpeter.dev>
+
+description: |+
+ Apple SoCs may contain an implementation of their Device Address
+ Resolution Table which provides a mandatory layer of address
+ translations for various masters external to the CPU.
+
+ Each DART instance is capable of handling up to 16 masters
+ mapped to up tp 16 different virtual address spaces with
+ page-level read/write access control flags.
+
+ This DART IOMMU also raises interrupts in response to various
+ fault conditions.
+
+properties:
+ compatible:
+ const: apple,t8103-dart
+
+ reg:
+ const: 1
+
+ interrupts:
+ const: 1
+
+ clocks:
+ maxItems: 1
+
+ '#iommu-cells':
+ const: 1
+ description:
+ The number of the master connected to this DART.
+
+required:
+ - compatible
+ - reg
+ - '#iommu-cells'
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |+
+ dart1: dart1@382f80000 {
+ compatible = "apple,t8103-dart";
+ reg = <0x3 0x82f80000 0x0 0x4000>;
+ interrupt-parent = <&aic>;
+ interrupts = <AIC_IRQ 781 IRQ_TYPE_LEVEL_HIGH>;
+ #iommu-cells = <1>;
+ };
+
+ master1 {
+ iommus = <&dart1 0>;
+ };
+
+ - |+
+ usb_dart0: usb_dart0@382f80000 {
+ compatible = "apple,t8103-dart";
+ reg = <0x3 0x82f80000 0x0 0x4000>;
+ interrupt-parent = <&aic>;
+ interrupts = <AIC_IRQ 781 IRQ_TYPE_LEVEL_HIGH>;
+ #iommu-cells = <1>;
+ };
+
+ usbdrd_dwc3_0: dwc3@382280000 {
+ compatible = "snps,dwc3";
+ reg = <0x3 0x82280000 0x0 0x100000>;
+ interrupt-parent = <&aic>;
+ interrupts = <AIC_IRQ 777 IRQ_TYPE_LEVEL_HIGH>;
+ iommus = <&usb_dart0 1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ dr_mode = "peripheral";
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index d5e4d93a536a..1f9a4f2de88b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1236,6 +1236,12 @@ L: linux-input@vger.kernel.org
S: Odd fixes
F: drivers/input/mouse/bcm5974.c
+APPLE DART IOMMU DRIVER
+M: Sven Peter <sven@svenpeter.dev>
+L: iommu@lists.linux-foundation.org
+S: Maintained
+F: Documentation/devicetree/bindings/iommu/apple,t8103-dart.yaml
+
APPLE SMC DRIVER
M: Henrik Rydberg <rydberg@bitmath.org>
L: linux-hwmon@vger.kernel.org
--
2.25.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-03-20 16:05 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-20 15:19 [PATCH 0/3] Apple M1 DART IOMMU driver Sven Peter via iommu
2021-03-20 15:19 ` [PATCH 1/3] iommu: io-pgtable: add DART pagetable format Sven Peter via iommu
2021-03-24 16:37 ` Robin Murphy
2021-03-25 20:47 ` Sven Peter via iommu
2021-03-20 15:20 ` Sven Peter via iommu [this message]
2021-03-22 0:15 ` [PATCH 2/3] dt-bindings: iommu: add DART iommu bindings Rob Herring
2021-03-22 18:16 ` Sven Peter via iommu
2021-03-21 16:00 ` [PATCH 0/3] Apple M1 DART IOMMU driver Mark Kettenis
2021-03-21 17:22 ` Sven Peter via iommu
2021-03-21 18:35 ` Mark Kettenis
2021-03-22 22:17 ` Sven Peter via iommu
2021-03-23 20:00 ` Mark Kettenis
2021-03-23 21:03 ` Sven Peter via iommu
2021-03-21 17:28 ` Sven Peter via iommu
2021-03-23 20:53 ` Rob Herring
2021-03-23 22:33 ` Mark Kettenis
2021-03-25 7:53 ` Sven Peter via iommu
2021-03-25 11:50 ` Robin Murphy
2021-03-25 20:49 ` Sven Peter via iommu
2021-03-27 15:33 ` Sven Peter via iommu
2021-03-25 21:41 ` Arnd Bergmann
2021-03-26 15:59 ` Mark Kettenis
2021-03-26 16:09 ` Arnd Bergmann
2021-03-26 16:10 ` Sven Peter via iommu
2021-03-26 16:38 ` Arnd Bergmann
2021-03-26 17:06 ` Sven Peter via iommu
2021-03-26 17:26 ` Mark Kettenis
2021-03-26 17:34 ` Robin Murphy
2021-03-26 17:51 ` Sven Peter via iommu
2021-03-26 19:59 ` Arnd Bergmann
2021-03-26 21:16 ` Mark Kettenis
2021-03-27 15:30 ` Sven Peter via iommu
2021-03-26 20:03 ` Arnd Bergmann
2021-03-26 21:13 ` Mark Kettenis
2021-03-24 15:29 ` Robin Murphy
2021-03-25 7:58 ` Sven Peter via iommu
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