rte_dma_port_param(3)

NAME
rte_dma_port_param

SYNOPSIS

#include <rte_dmadev.h>

  Data Fields

enum rte_dma_port_type port_type
uint64_t reserved [2]

Detailed Description

A structure used to descript DMA access port parameters.

See also
    struct rte_dma_vchan_conf::src_port

    struct rte_dma_vchan_conf::dst_port

Definition at line 498 of file rte_dmadev.h.

Field Documentation

  enum rte_dma_port_type port_type
The device access port type.

See also
    enum rte_dma_port_type

Definition at line 503 of file rte_dmadev.h.

  uint64_t coreid
PCIe core id used.

Definition at line 556 of file rte_dmadev.h.

  uint64_t pfid
PF id used.

Definition at line 557 of file rte_dmadev.h.

  uint64_t vfen
VF enable bit.

Definition at line 558 of file rte_dmadev.h.

  uint64_t vfid
VF id used.

Definition at line 559 of file rte_dmadev.h.

  uint64_t pasid
The pasid filed in TLP packet.

Definition at line 561 of file rte_dmadev.h.

  uint64_t attr
The attributes filed in TLP packet.

Definition at line 563 of file rte_dmadev.h.

  uint64_t ph
The processing hint filed in TLP packet.

Definition at line 565 of file rte_dmadev.h.

  uint64_t st
The steering tag filed in TLP packet.

Definition at line 567 of file rte_dmadev.h.

  __extension__ union { ... } pcie
PCIe access port parameters.

The following model shows SoC's PCIe module connects to multiple PCIe hosts and multiple endpoints. The PCIe module has an integrated DMA controller.

If the DMA wants to access the memory of host A, it can be initiated by PF1 in core0, or by VF0 of PF0 in core0.

System Bus
   |     ----------PCIe module----------
   |     Bus
   |     Interface
   |     -----        ------------------
   |     |   |        | PCIe Core0     |
   |     |   |        |                |        -----------
   |     |   |        |   PF-0 -- VF-0 |        | Host A  |
   |     |   |--------|        |- VF-1 |--------| Root    |
   |     |   |        |   PF-1         |        | Complex |
   |     |   |        |   PF-2         |        -----------
   |     |   |        ------------------
   |     |   |
   |     |   |        ------------------
   |     |   |        | PCIe Core1     |
   |     |   |        |                |        -----------
   |     |   |        |   PF-0 -- VF-0 |        | Host B  |
   |-----|   |--------|   PF-1 -- VF-0 |--------| Root    |
   |     |   |        |        |- VF-1 |        | Complex |
   |     |   |        |   PF-2         |        -----------
   |     |   |        ------------------
   |     |   |
   |     |   |        ------------------
   |     |DMA|        |                |        ------
   |     |   |        |                |--------| EP |
   |     |   |--------| PCIe Core2     |        ------
   |     |   |        |                |        ------
   |     |   |        |                |--------| EP |
   |     |   |        |                |        ------
   |     -----        ------------------

Note
    If some fields can not be supported by the hardware/driver, then the driver ignores those fields. Please check driver-specific documentation for limitations and capabilities.

  uint64_t reserved[2]
Reserved for future fields.

Definition at line 572 of file rte_dmadev.h.

Author

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