rte_dma_port_param(3)

💖 NAME 💖

rte_dma_port_param — bestie, it's a struct, and it's here to describe DMA access port parameters ✨

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🎀 SYNOPSIS 🎀

#include <rte_dmadev.h>

Data Fields

• enum rte_dma_port_type port_type
• uint64_t reserved [2]

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🦋 Detailed Description 🦋

Okay so this struct's whole job — its entire main character arc — is to describe DMA access port parameters. That's it, that's the vibe 💅

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. 📍

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👑 Field Documentation 👑

🌈 enum rte_dma_port_type port_type

The device access port type. That's the whole tea 🍵

See also

• enum rte_dma_port_type

Definition at line 503 of file rte_dmadev.h. 📍

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🌸 uint64_t coreid

PCIe core id used.

Definition at line 556 of file rte_dmadev.h. 📍

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🌸 uint64_t pfid

PF id used.

Definition at line 557 of file rte_dmadev.h. 📍

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🌸 uint64_t vfen

VF enable bit.

Definition at line 558 of file rte_dmadev.h. 📍

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🌸 uint64_t vfid

VF id used.

Definition at line 559 of file rte_dmadev.h. 📍

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🌸 uint64_t pasid

The pasid filed in TLP packet.

Definition at line 561 of file rte_dmadev.h. 📍

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🌸 uint64_t attr

The attributes filed in TLP packet.

Definition at line 563 of file rte_dmadev.h. 📍

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🌸 uint64_t ph

The processing hint filed in TLP packet.

Definition at line 565 of file rte_dmadev.h. 📍

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🌸 uint64_t st

The steering tag filed in TLP packet.

Definition at line 567 of file rte_dmadev.h. 📍

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🧚 __extension__ union { ... } pcie

PCIe access port parameters. No cap, this is the juicy one 🫶

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. Like, actually check it, bestie — don't guess 🙈

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💜 uint64_t reserved[2]

Reserved for future fields.

Definition at line 572 of file rte_dmadev.h. 📍

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✍️ Author

Generated automatically by Doxygen for DPDK from the source code.

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Okay that's the whole page, and yes it slayed ⭐ Version 25.11.3 of DPDK, rte_dma_port_param(3), that's the whole vibe — catch you in the next manpage, bestie 💖🎀🦋