88 lines
3.2 KiB
Plaintext
88 lines
3.2 KiB
Plaintext
Qualcomm Internet Packet Accelerator
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Internet Packet Accelerator (IPA) is a programmable protocol
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processor HW block. It is designed to support generic HW processing
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of UL/DL IP packets for various use cases independent of radio technology.
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Required properties:
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IPA node:
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- compatible : "qcom,ipa"
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- reg: Specifies the base physical addresses and the sizes of the IPA
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registers.
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- reg-names: "ipa-base" - string to identify the IPA CORE base registers.
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"bam-base" - string to identify the IPA BAM base registers.
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"a2-bam-base" - string to identify the A2 BAM base registers.
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- interrupts: Specifies the interrupt associated with IPA.
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- interrupt-names: "ipa-irq" - string to identify the IPA core interrupt.
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"bam-irq" - string to identify the IPA BAM interrupt.
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"a2-bam-irq" - string to identify the A2 BAM interrupt.
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- qcom,ipa-hw-ver: Specifies the IPA hardware version.
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IPA pipe sub nodes (A2 static pipes configurations):
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-label: two labels are supported, a2-to-ipa and ipa-to-a2 which
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supply static configuration for A2-IPA connection.
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-qcom,src-bam-physical-address: The physical address of the source BAM
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-qcom,ipa-bam-mem-type:The memory type:
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0(Pipe memory), 1(Private memory), 2(System memory)
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-qcom,src-bam-pipe-index: Source pipe index
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-qcom,dst-bam-physical-address: The physical address of the
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destination BAM
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-qcom,dst-bam-pipe-index: Destination pipe index
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-qcom,data-fifo-offset: Data fifo base offset
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-qcom,data-fifo-size: Data fifo size (bytes)
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-qcom,descriptor-fifo-offset: Descriptor fifo base offset
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-qcom,descriptor-fifo-size: Descriptor fifo size (bytes)
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Optional properties:
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-qcom,ipa-pipe-mem: Specifies the base physical address and the
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size of the IPA pipe memory region.
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Pipe memory is a feature which may be supported by the
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target (HW platform). The Driver support using pipe
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memory instead of system memory. In case this property
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will not appear in the IPA DTS entry, the driver will
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use system memory.
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Example:
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qcom,ipa@fd4c0000 {
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compatible = "qcom,ipa";
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reg = <0xfd4c0000 0x26000>,
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<0xfd4c4000 0x14818>;
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<0xfc834000 0x7000>;
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reg-names = "ipa-base", "bam-base"; "a2-bam-base";
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interrupts = <0 252 0>,
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<0 253 0>;
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<0 29 1>;
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interrupt-names = "ipa-irq", "bam-irq"; "a2-bam-irq";
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qcom,ipa-hw-ver = <1>;
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qcom,pipe1 {
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label = "a2-to-ipa";
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qcom,src-bam-physical-address = <0xfc834000>;
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qcom,ipa-bam-mem-type = <0>;
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qcom,src-bam-pipe-index = <1>;
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qcom,dst-bam-physical-address = <0xfd4c0000>;
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qcom,dst-bam-pipe-index = <6>;
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qcom,data-fifo-offset = <0x1000>;
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qcom,data-fifo-size = <0xd00>;
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qcom,descriptor-fifo-offset = <0x1d00>;
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qcom,descriptor-fifo-size = <0x300>;
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};
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qcom,pipe2 {
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label = "ipa-to-a2";
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qcom,src-bam-physical-address = <0xfd4c0000>;
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qcom,ipa-bam-mem-type = <0>;
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qcom,src-bam-pipe-index = <7>;
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qcom,dst-bam-physical-address = <0xfc834000>;
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qcom,dst-bam-pipe-index = <0>;
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qcom,data-fifo-offset = <0x00>;
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qcom,data-fifo-size = <0xd00>;
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qcom,descriptor-fifo-offset = <0xd00>;
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qcom,descriptor-fifo-size = <0x300>;
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};
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};
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