STRUCT SOF_IPC_OPS(9)

💅 NAME

okay so bestie, welcome to struct sof_ipc_ops — it's the IPC-specific ops struct, and honestly it's giving "the whole personality of the IPC layer in one little bundle." This is from the Kernel API Manual, and yes we're reading kernel docs for fun now, that's just who we are 🎀

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✨ SYNOPSIS ✨

struct sof_ipc_ops {
    const struct sof_ipc_tplg_ops *tplg;
    const struct sof_ipc_pm_ops *pm;
    const struct sof_ipc_pcm_ops *pcm;
    const struct sof_ipc_fw_loader_ops *fw_loader;
    const struct sof_ipc_fw_tracing_ops *fw_tracing;
    int (*init)(struct snd_sof_dev *sdev);
    void (*exit)(struct snd_sof_dev *sdev);
    int (*post_fw_boot)(struct snd_sof_dev *sdev);
    int (*tx_msg)(struct snd_sof_dev *sdev, void *msg_data, size_t
msg_bytes, void *reply_data, size_t reply_bytes, bool no_pm);
    int (*set_get_data)(struct snd_sof_dev *sdev, void *data, size_t
data_bytes, bool set);
    int (*get_reply)(struct snd_sof_dev *sdev);
    void (*rx_msg)(struct snd_sof_dev *sdev);
 };

look at her. a whole squad of function pointers and op-struct pointers, all holding hands 💖

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🫶 Members 🫶

okay bestie, member-by-member tour, let's go:

• tplg — Pointer to IPC-specific topology ops 🌸
• pm — Pointer to PM ops 💤
• pcm — Pointer to PCM ops 🎧
• fw_loader — Pointer to Firmware Loader ops 📦
• fw_tracing — Optional pointer to Firmware tracing ops 🔍
• init — Optional pointer for IPC related initialization 🌱
• exit — Optional pointer for IPC related cleanup 🧹
• post_fw_boot — Optional pointer to execute IPC related tasks after firmware boot. like, after the firmware wakes up and has its little morning coffee ☕✨
• tx_msg — Function pointer for sending a 'short' IPC message 📨
• set_get_data — Function pointer for set/get data ('large' IPC message). This function may split up the 'large' message and use the tx_msg path to transfer individual chunks, or use other means to transfer the message 🧩
• get_reply — Function pointer for fetching the reply to sdev->ipc->msg.reply_data 📬
• rx_msg — Function pointer for handling a received message 📥

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👑 Note 👑

bestie, listen, this part matters: both tx_msg and set_get_data are considered as TX functions, and they are serialized for the duration of the instructed transfer. No cutting in line, no double-booking, periodt 💅

and like, a large message sent via set_get_data counts as a single transfer — even if at the hardware level it's handled with multiple chunks. one vibe, one transfer, no cap 🔥

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🌈 SEE ALSO 🌈

go touch some related grass, bestie:

• Kernel file ./sound/soc/sof/sof-priv.h struct
• snd_sof_platform_stream_params(9)
• struct sof_firmware(9)
• struct sof_ipc_fw_tracing_ops(9)
• struct sof_ipc_pm_ops(9)
• struct sof_ipc_fw_loader_ops(9)

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and that's the whole page, bestie 🫶 this little lore drop lives in ./sound/soc/sof, dated October 2026, and it goes out as struct sof_ipc_ops(9) — go forth and read your structs, i'm obsessed with you 💜🎀