Message unit node:
For SRIO controllers that implement the message unit as part of the controller
this node is required. For devices with RMAN this node should NOT exist. The
node is composed of three types of sub-nodes (“fsl-srio-msg-unit”,
“fsl-srio-dbell-unit” and “fsl-srio-port-write-unit”).
See srio.txt for more details about generic SRIO controller details.
compatible
Usage: required
Value type:
Definition: Must include “fsl,srio-rmu-vX.Y”, “fsl,srio-rmu”.The version X.Y should match the general SRIO controller’s IP Block
revision register’s Major(X) and Minor (Y) value.reg
Usage: required
Value type:
Definition: A standard property. Specifies the physical address and
length of the SRIO configuration registers for message units
and doorbell units.fsl,liodn
Usage: optional-but-recommended (for devices with PAMU)
Value type:
Definition: The logical I/O device number for the PAMU (IOMMU) to be
correctly configured for SRIO accesses. The property should
not exist on devices that do not support PAMU.The LIODN value is associated with all RMU transactions
(msg-unit, doorbell, port-write).
Sub-Nodes for RMU: The RMU node is composed of multiple sub-nodes that
correspond to the actual sub-controllers in the RMU. The manual for a given
SoC will detail which and how many of these sub-controllers are implemented.
Message Unit:
compatible
Usage: required
Value type:
Definition: Must include “fsl,srio-msg-unit-vX.Y”, “fsl,srio-msg-unit”.The version X.Y should match the general SRIO controller’s IP Block
revision register’s Major(X) and Minor (Y) value.reg
Usage: required
Value type:
Definition: A standard property. Specifies the physical address and
length of the SRIO configuration registers for message units
and doorbell units.interrupts
Usage: required
Value type:
Definition: Specifies the interrupts generated by this device. The
value of the interrupts property consists of one interrupt
specifier. The format of the specifier is defined by the
binding document describing the node’s interrupt parent.A pair of IRQs are specified in this property. The first
element is associated with the transmit (TX) interrupt and the
second element is associated with the receive (RX) interrupt.
Doorbell Unit:
compatible
Usage: required
Value type:
Definition: Must include:
“fsl,srio-dbell-unit-vX.Y”, “fsl,srio-dbell-unit”The version X.Y should match the general SRIO controller’s IP Block
revision register’s Major(X) and Minor (Y) value.reg
Usage: required
Value type:
Definition: A standard property. Specifies the physical address and
length of the SRIO configuration registers for message units
and doorbell units.interrupts
Usage: required
Value type:
Definition: Specifies the interrupts generated by this device. The
value of the interrupts property consists of one interrupt
specifier. The format of the specifier is defined by the
binding document describing the node’s interrupt parent.A pair of IRQs are specified in this property. The first
element is associated with the transmit (TX) interrupt and the
second element is associated with the receive (RX) interrupt.
Port-Write Unit:
compatible
Usage: required
Value type:
Definition: Must include:"fsl,srio-port-write-unit-vX.Y", "fsl,srio-port-write-unit"The version X.Y should match the general SRIO controller’s IP Block
revision register’s Major(X) and Minor (Y) value.reg
Usage: required
Value type:
Definition: A standard property. Specifies the physical address and
length of the SRIO configuration registers for message units
and doorbell units.interrupts
Usage: required
Value type:
Definition: Specifies the interrupts generated by this device. The
value of the interrupts property consists of one interrupt
specifier. The format of the specifier is defined by the
binding document describing the node’s interrupt parent.A single IRQ that handles port-write conditions is
specified by this property. (Typically shared with error).Note: All other standard properties (see the ePAPR) are allowed
but are optional.
Example:
rmu: rmu@d3000 {
compatible = “fsl,srio-rmu”;
reg = <0xd3000 0x400>;
ranges = <0x0 0xd3000 0x400>;
fsl,liodn = <0xc8>;
message-unit@0 {
compatible = "fsl,srio-msg-unit";
reg = <0x0 0x100>;
interrupts = <
60 2 0 0 /* msg1_tx_irq */
61 2 0 0>;/* msg1_rx_irq */
};
message-unit@100 {
compatible = "fsl,srio-msg-unit";
reg = <0x100 0x100>;
interrupts = <
62 2 0 0 /* msg2_tx_irq */
63 2 0 0>;/* msg2_rx_irq */
};
doorbell-unit@400 {
compatible = "fsl,srio-dbell-unit";
reg = <0x400 0x80>;
interrupts = <
56 2 0 0 /* bell_outb_irq */
57 2 0 0>;/* bell_inb_irq */
};
port-write-unit@4e0 {
compatible = "fsl,srio-port-write-unit";
reg = <0x4e0 0x20>;
interrupts = <16 2 1 11>;
};
};
