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[RFC,03/21] dt-bindings: PCI: Endpoint: Add DT bindings for PCI EPF NTB Device

Message ID 20190926112933.8922-4-kishon@ti.com
State New
Delegated to: Lorenzo Pieralisi
Headers show
Series Implement NTB Controller using multiple PCI | expand

Commit Message

Kishon Vijay Abraham I Sept. 26, 2019, 11:29 a.m. UTC 
Add device tree bindings for PCI endpoint NTB function device.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 .../bindings/pci/endpoint/pci-epf-ntb.txt     | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/endpoint/pci-epf-ntb.txt
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Patch

diff --git a/Documentation/devicetree/bindings/pci/endpoint/pci-epf-ntb.txt b/Documentation/devicetree/bindings/pci/endpoint/pci-epf-ntb.txt
new file mode 100644
index 000000000000..e7896932423e
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/endpoint/pci-epf-ntb.txt
@@ -0,0 +1,31 @@ 
+PCI Endpoint NTB Function Device
+
+This describes the bindings to be used when a NTB device has to be
+exposed to the remote host over PCIe.
+
+Required Properties:
+ - compatible: Should be "pci-epf-ntb"
+ - epcs: As defined in generic pci-epf bindings defined in pci-epf.txt
+ - epc-names: As defined in generic pci-epf bindings defined in pci-epf.txt
+ - vendor-id: As defined in generic pci-epf bindings defined in pci-epf.txt
+ - device-id: As defined in generic pci-epf bindings defined in pci-epf.txt
+ - num-mws: Specify the number of memory windows. Should not be more than 4.
+ - mws-size: List of 'num-mws' entries containing size of each memory window.
+
+Optional Properties:
+ - spad-count: Specify the number of scratchpad registers to be supported
+ - db-count: Specify the number of doorbell interrupts to be supported. Must
+	     not be greater than 32.
+
+Example:
+Following is an example of NTB device exposed to the remote host.
+
+ntb {
+	compatible = "pci-epf-ntb";
+	epcs = <&pcie0_ep>, <&pcie1_ep>;
+	epc-names = "primary", "secondary";
+	vendor-id = /bits/ 16 <0x104c>;
+	device-id = /bits/ 16 <0xb00d>;
+	num-mws = <4>;
+	mws-size = <0x100000>, <0x100000>, <0x100000>, <0x100000>;
+};