rte_dma_port_param(3)

📦 version 26.03, in nixos 26.05, nixpkgs unstable

💖 `rte_dma_port_param(3)` 💖

okay so bestie, this page is from the Library Functions Manual, and it's literally all about rte_dma_port_param — a DPDK struct situation. let's get into it ✨

🌸 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. (yes, "descript" is what the page says — we keep the facts exactly, bestie 🫶)

🌈 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.

💜 `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 🫶

Generated automatically by Doxygen for DPDK from the source code.

💖 okay that's the whole page! cute little footer shoutout: this is DPDK, Version 26.03.0 — source/version noted, and the footer doesn't give a date, bestie. mwah! 💅✨

📦 where this page comes from

nixos 26.05: dpdk 26.03
nixpkgs unstable: dpdk 26.03
💖 girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on 2026-11-04: a language model's rewrite of the original, under its terms

rte_dma_port_param(3)