From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt | 89 +++++++++++++++++++++++++++++++++++++++++---
1 files changed, 83 insertions(+), 6 deletions(-)
diff --git a/kernel/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt b/kernel/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
index 6611a7c..7b486d4 100644
--- a/kernel/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
+++ b/kernel/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
@@ -9,6 +9,35 @@
such as network interfaces, crypto accelerator instances, L2 switches,
etc.
+For an overview of the DPAA2 architecture and fsl-mc bus see:
+Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
+
+As described in the above overview, all DPAA2 objects in a DPRC share the
+same hardware "isolation context" and a 10-bit value called an ICID
+(isolation context id) is expressed by the hardware to identify
+the requester.
+
+The generic 'iommus' property is insufficient to describe the relationship
+between ICIDs and IOMMUs, so an iommu-map property is used to define
+the set of possible ICIDs under a root DPRC and how they map to
+an IOMMU.
+
+For generic IOMMU bindings, see
+Documentation/devicetree/bindings/iommu/iommu.txt.
+
+For arm-smmu binding, see:
+Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
+
+The MSI writes are accompanied by sideband data which is derived from the ICID.
+The msi-map property is used to associate the devices with both the ITS
+controller and the sideband data which accompanies the writes.
+
+For generic MSI bindings, see
+Documentation/devicetree/bindings/interrupt-controller/msi.txt.
+
+For GICv3 and GIC ITS bindings, see:
+Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml.
+
Required properties:
- compatible
@@ -29,11 +58,6 @@
-the second region is the MC control registers. This
region may not be present in some scenarios, such
as in the device tree presented to a virtual machine.
-
- - msi-parent
- Value type: <phandle>
- Definition: Must be present and point to the MSI controller node
- handling message interrupts for the MC.
- ranges
Value type: <prop-encoded-array>
@@ -88,14 +112,67 @@
Value type: <phandle>
Definition: Specifies the phandle to the PHY device node associated
with the this dpmac.
+Optional properties:
+
+- iommu-map: Maps an ICID to an IOMMU and associated iommu-specifier
+ data.
+
+ The property is an arbitrary number of tuples of
+ (icid-base,iommu,iommu-base,length).
+
+ Any ICID i in the interval [icid-base, icid-base + length) is
+ associated with the listed IOMMU, with the iommu-specifier
+ (i - icid-base + iommu-base).
+
+- msi-map: Maps an ICID to a GIC ITS and associated msi-specifier
+ data.
+
+ The property is an arbitrary number of tuples of
+ (icid-base,gic-its,msi-base,length).
+
+ Any ICID in the interval [icid-base, icid-base + length) is
+ associated with the listed GIC ITS, with the msi-specifier
+ (i - icid-base + msi-base).
+
+Deprecated properties:
+
+ - msi-parent
+ Value type: <phandle>
+ Definition: Describes the MSI controller node handling message
+ interrupts for the MC. When there is no translation
+ between the ICID and deviceID this property can be used
+ to describe the MSI controller used by the devices on the
+ mc-bus.
+ The use of this property for mc-bus is deprecated. Please
+ use msi-map.
Example:
+
+ smmu: iommu@5000000 {
+ compatible = "arm,mmu-500";
+ #iommu-cells = <1>;
+ stream-match-mask = <0x7C00>;
+ ...
+ };
+
+ gic: interrupt-controller@6000000 {
+ compatible = "arm,gic-v3";
+ ...
+ }
+ its: gic-its@6020000 {
+ compatible = "arm,gic-v3-its";
+ msi-controller;
+ ...
+ };
fsl_mc: fsl-mc@80c000000 {
compatible = "fsl,qoriq-mc";
reg = <0x00000008 0x0c000000 0 0x40>, /* MC portal base */
<0x00000000 0x08340000 0 0x40000>; /* MC control reg */
- msi-parent = <&its>;
+ /* define map for ICIDs 23-64 */
+ iommu-map = <23 &smmu 23 41>;
+ /* define msi map for ICIDs 23-64 */
+ msi-map = <23 &its 23 41>;
#address-cells = <3>;
#size-cells = <1>;
--
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