STRUCT KNAV_DMA_RX_CFG(9)

💅 struct knav_dma_rx_cfg(9) — Rx flow configuration 🎀

okay so bestie, welcome to the kernel API manual ✨ this whole page is literally about one struct — struct knav_dma_rx_cfg — and it's the entire vibe check for how a receive (Rx) flow gets set up. ngl it's giving "small struct, big job" energy 👑

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🌸 NAME 🌸

struct knav_dma_rx_cfg — Rx flow configuration. that's it, that's the whole name section, and it ate 💅

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⭐ SYNOPSIS ⭐

here's the whole layout, character for character, no cap 🫶

struct knav_dma_rx_cfg {
    bool einfo_present;
    bool psinfo_present;
    enum knav_dma_rx_err_mode       err_mode;
    enum knav_dma_desc_type         desc_type;
    bool psinfo_at_sop;
    unsigned int                    sop_offset;
    unsigned int                    dst_q;
    enum knav_dma_rx_thresholds     thresh;
    unsigned int                    fdq[KNAV_DMA_FDQ_PER_CHAN];
    unsigned int                    sz_thresh0;
    unsigned int                    sz_thresh1;
    unsigned int                    sz_thresh2;
 };

she's a struct with range, she's a struct with lore, she is everything 🌈

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🦋 Members 🦋

okay now the main character section — every single field, lemme introduce you 💖

• einfo_present — extended packet info present? say less, it's a bool and it's telling you whether that extended packet info is in the building ✨
• psinfo_present — PS words present. are the PS words here or are they ghosting you? this bool knows 🙈
• err_mode — an enum knav_dma_rx_err_mode, and it's literally the error behaviour when you hit buffer starvation. that's the moment, that's the drama 😭
• desc_type — an enum knav_dma_desc_type — host or monolithic desc, pick your icon 👑
• psinfo_at_sop — bool, and it's true when the PS word is located at start of packet. lowkey positional queen 💅
• sop_offset — start of packet offset, an unsigned int doing its little offset thing 🎀
• dst_q — destination queue for a given flow, also an unsigned int. it's giving directions, it's giving destination energy 🗺️
• thresh — an enum knav_dma_rx_thresholds — the Rx flow size threshold, the moment where size gets judged (lovingly) ⭐
• fdq — the Free desc Queue array! unsigned int fdq[KNAV_DMA_FDQ_PER_CHAN]; — a whole array, per channel, living her best life 🦋
• sz_thresh0 — RX packet size threshold 0, an unsigned int and the first of her name 🌸
• sz_thresh1 — RX packet size threshold 1, yes there's a second one, she's not alone 💜
• sz_thresh2 — RX packet size threshold 2, the third threshold, completing the threshold trio, periodt 🔥

fr fr bestie, write these fields exactly as they are — kernel code does not appreciate creative reinterpretation 💀

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🔥 SEE ALSO 🔥

go read these next, iykyk 👀

• Kernel file ./include/linux/soc/ti/knav_dma.h
• struct knav_dma_tx_cfg(9)
• struct knav_dma_cfg(9)
• struct knav_dma_desc(9)

the Tx one is right there if you wanna see the other side of the story, and the desc/cfg ones are the supporting cast, all iconic, all worth a read 🫶

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🎀 sign-off 🎀

that's the whole page babes 💖 this one lives at ./include/linux/soc/ti, dated October 2026, and it's filed under the header struct knav_dma_rx_cfg(9) — same name, same manual, no notes. go configure some Rx flows and slay ✨👑💅