STRUCT NVEC_MSG(9)

✨ struct nvec_msg(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 today we're talking about struct nvec_msg — literally just a buffer for a single message, no cap 🎀

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🌸 NAME 🌸

struct nvec_msg — a buffer for a single message 🦋

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⭐ SYNOPSIS ⭐

struct nvec_msg {
    struct list_head node;
    unsigned char data[NVEC_MSG_SIZE];
    unsigned short size;
    unsigned short pos;
    atomic_t used;
 };

like, that's the whole vibe. five fields. she's compact, she's iconic 👑

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💖 Members 💖

• node — messages are part of various lists in a struct nvec_chip — so she's linked up, she's got connections, main character energy fr fr 🔥
• data — the actual data of the message. the payload. the moment. the lore 💀
• size — for TX messages, this is the number of bytes used in data. literally just how much of the buffer is doing something 🌸
• pos — for RX messages, it's the current position to write to. for TX messages, it's the position to read from. so it's giving "where are we rn" energy, iykyk 🦋
• used — used for the message pool to mark a message as free/allocated. the vibe check for whether this message is claimed or up for grabs ✨

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🧚 Description 🧚

this structure is used to hold outgoing and incoming messages 💌 and ngl, outgoing messages have a different format than incoming ones — and that is not documented yet 🙈 so yeah, that part's a mystery, we don't know her yet, she's keeping secrets 😭

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👑 SEE ALSO 👑

• Kernel file ./drivers/staging/nvec/nvec.h
• enum nvec_event_size(9)
• enum nvec_msg_type(9)
• struct nvec_chip(9)

go read those next, bestie, they're lowkey required reading 📚💜

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k bye ily, this page lives in ./drivers/staging/nvec and it's dated October 2026, and yes we're closing out with struct nvec_msg(9) again because she deserves a second mention 🫶✨