1 * Freescale Management Complex
3 The Freescale Management Complex (fsl-mc) is a hardware resource
4 manager that manages specialized hardware objects used in
5 network-oriented packet processing applications. After the fsl-mc
6 block is enabled, pools of hardware resources are available, such as
7 queues, buffer pools, I/O interfaces. These resources are building
8 blocks that can be used to create functional hardware objects/devices
9 such as network interfaces, crypto accelerator instances, L2 switches,
12 For an overview of the DPAA2 architecture and fsl-mc bus see:
13 Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
15 As described in the above overview, all DPAA2 objects in a DPRC share the
16 same hardware "isolation context" and a 10-bit value called an ICID
17 (isolation context id) is expressed by the hardware to identify
20 The generic 'iommus' property is insufficient to describe the relationship
21 between ICIDs and IOMMUs, so an iommu-map property is used to define
22 the set of possible ICIDs under a root DPRC and how they map to
25 For generic IOMMU bindings, see
26 Documentation/devicetree/bindings/iommu/iommu.txt.
28 For arm-smmu binding, see:
29 Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
31 The MSI writes are accompanied by sideband data which is derived from the ICID.
32 The msi-map property is used to associate the devices with both the ITS
33 controller and the sideband data which accompanies the writes.
35 For generic MSI bindings, see
36 Documentation/devicetree/bindings/interrupt-controller/msi.txt.
38 For GICv3 and GIC ITS bindings, see:
39 Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml.
45 Definition: Must be "fsl,qoriq-mc". A Freescale Management Complex
46 compatible with this binding must have Block Revision
47 Registers BRR1 and BRR2 at offset 0x0BF8 and 0x0BFC in
48 the MC control register region.
51 Value type: <prop-encoded-array>
52 Definition: A standard property. Specifies one or two regions
53 defining the MC's registers:
55 -the first region is the command portal for the
56 this machine and must always be present
58 -the second region is the MC control registers. This
59 region may not be present in some scenarios, such
60 as in the device tree presented to a virtual machine.
63 Value type: <prop-encoded-array>
64 Definition: A standard property. Defines the mapping between the child
65 MC address space and the parent system address space.
67 The MC address space is defined by 3 components:
68 <region type> <offset hi> <offset lo>
70 Valid values for region type are
76 Definition: Must be 3. (see definition in 'ranges' property)
80 Definition: Must be 1.
84 The fsl-mc node may optionally have dpmac sub-nodes that describe
85 the relationship between the Ethernet MACs which belong to the MC
86 and the Ethernet PHYs on the system board.
88 The dpmac nodes must be under a node named "dpmacs" which contains
89 the following properties:
93 Definition: Must be present if dpmac sub-nodes are defined and must
98 Definition: Must be present if dpmac sub-nodes are defined and must
101 These nodes must have the following properties:
105 Definition: Must be "fsl,qoriq-mc-dpmac".
108 Value type: <prop-encoded-array>
109 Definition: Specifies the id of the dpmac.
112 Value type: <phandle>
113 Definition: Specifies the phandle to the PHY device node associated
117 - iommu-map: Maps an ICID to an IOMMU and associated iommu-specifier
120 The property is an arbitrary number of tuples of
121 (icid-base,iommu,iommu-base,length).
123 Any ICID i in the interval [icid-base, icid-base + length) is
124 associated with the listed IOMMU, with the iommu-specifier
125 (i - icid-base + iommu-base).
127 - msi-map: Maps an ICID to a GIC ITS and associated msi-specifier
130 The property is an arbitrary number of tuples of
131 (icid-base,gic-its,msi-base,length).
133 Any ICID in the interval [icid-base, icid-base + length) is
134 associated with the listed GIC ITS, with the msi-specifier
135 (i - icid-base + msi-base).
137 Deprecated properties:
140 Value type: <phandle>
141 Definition: Describes the MSI controller node handling message
142 interrupts for the MC. When there is no translation
143 between the ICID and deviceID this property can be used
144 to describe the MSI controller used by the devices on the
146 The use of this property for mc-bus is deprecated. Please
151 smmu: iommu@5000000 {
152 compatible = "arm,mmu-500";
154 stream-match-mask = <0x7C00>;
158 gic: interrupt-controller@6000000 {
159 compatible = "arm,gic-v3";
162 its: gic-its@6020000 {
163 compatible = "arm,gic-v3-its";
168 fsl_mc: fsl-mc@80c000000 {
169 compatible = "fsl,qoriq-mc";
170 reg = <0x00000008 0x0c000000 0 0x40>, /* MC portal base */
171 <0x00000000 0x08340000 0 0x40000>; /* MC control reg */
172 /* define map for ICIDs 23-64 */
173 iommu-map = <23 &smmu 23 41>;
174 /* define msi map for ICIDs 23-64 */
175 msi-map = <23 &its 23 41>;
176 #address-cells = <3>;
180 * Region type 0x0 - MC portals
181 * Region type 0x1 - QBMAN portals
183 ranges = <0x0 0x0 0x0 0x8 0x0c000000 0x4000000
184 0x1 0x0 0x0 0x8 0x18000000 0x8000000>;
187 #address-cells = <1>;
191 compatible = "fsl,qoriq-mc-dpmac";
193 phy-handle = <&mdio0_phy0>;