STRUCT MUX_LITE_CMDH(9)

✨ struct mux_lite_cmdh(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 today's main character is struct mux_lite_cmdh — literally the MUX Lite Command Header, and yes she's iconic for it 👑

---

🌸 NAME 🌸

struct mux_lite_cmdh — the MUX Lite Command Header, no cap 🎀

---

🦋 SYNOPSIS 🦋

struct mux_lite_cmdh {
    __le32 signature;
    __le16 cmd_len;
    u8 if_id;
    u8 reserved;
    __le32 command_type;
    __le32 transaction_id;
    union mux_cmd_param param;
 };

like, that's the whole vibe. every field is doing its little job and we love that for them 🫶

---

💅 Members 💅

• signature — the Signature of the Command Header, and it's literally 0x48444D43. that's the number, don't come for her 🔥
• cmd_len — the Length (in bytes) of the command. important note bestie: this length shall include the header size. Minimum value: 0x10 ⭐ so don't try to go below that, she will not be having it.
• if_id — the ID of the interface that the commands in the table belong to. iykyk 🌈
• reserved — Reserved. Set to zero. that's it, that's the whole job 💀 zero. zero. 🍓
• command_type — the Command Enum. cute little enum waking up and choosing violence 🧚
• transaction_id — a 4 byte value that shall be generated and sent along with a command. Responses and ACKs shall have the same Transaction ID as their commands. and it shall be unique to the command transaction on the given interface — like a little fingerprint but make it bytes 👑 no duplicates on the same interface, fr fr.
• param — Optional parameters used with the command. the little extra sprinkle on top 🎀

---

🔥 SEE ALSO 🔥

everything below is in the Kernel file ./drivers/net/wwan/iosm/iosm_ipc_mux_codec.h — go read it, bestie, it's giving required reading 📚

• struct mux_cmdh(9)
• struct mux_acbh(9)
• struct mux_adbh(9)
• struct mux_adth(9)
• struct mux_adgh(9)
• struct mux_lite_vfl(9)
• struct ipc_mem_lite_gen_tbl(9)
• union mux_type_cmdh(9)
• union mux_type_header(9)
• ipc_mux_dl_acb_send_cmds(9)
• ipc_mux_netif_tx_flowctrl(9)
• ipc_mux_ul_trigger_encode(9)
• ipc_mux_ul_data_encode(9)
• ipc_mux_ul_encoded_process(9)

---

lowkey a whole friend group of structs and functions and every single one of them ate 💖 don't skip the cross-references, they're there for a reason 🦋

---

and that's the page, bestie!! brought to you by ./drivers/net/wwan/iosm, dated October 2026, and yeah the header/footer says struct mux_lite_cmdh(9) — periodt 💜✨🌸