ipc_protocol_msg_send(9)

💌 ipc_protocol_msg_send(9) — the kernel API manual, bestie edition

okay so like. hi. you're reading the page for ipc_protocol_msg_send(9) and honestly? you came to the right place. this is the kernel API manual, section 9, and we're gonna get you comfy with it. no gatekeeping, no "figure it out yourself" energy — just vibes and facts. 💅✨

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🌸 NAME 🌸

ipc_protocol_msg_send — Send ipc control message to CP and wait for response

like, that's literally it. you yeet a control message over to the CP and then you stay there, waiting, like a bestie refreshing their messages at 2am. 🫶

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✨ SYNOPSIS ✨

int ipc_protocol_msg_send (struct iosm_protocol *ipc_protocol , enum
ipc_msg_prep_type prep , union ipc_msg_prep_args *prep_args );

three args, one int coming back. iconic. no cap. 💖

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🎀 ARGUMENTS 🎀

• ipc_protocol — Pointer to ipc_protocol instance. yeah it's a pointer to the ipc_protocol instance, your main character struct, the one who runs the whole group chat. 👑
• prep — Message type. this is the enum telling everyone what kind of message we're sending. type check: passed. 💅
• prep_args — Message arguments. the actual payload-ish side of things — a union of the message args. pack it cute, pack it right. 🎁

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🦋 RETURN 🦋

0 on success and failure value on error

so: 0 means slay, we're good. anything in the "failure value" category means it did not slay, and you should probably handle it instead of pretending you didn't see it. 😭🙈

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/wwan/iosm/iosm_ipc_protocol.h
• struct ipc_protocol_context_info(9)
• struct ipc_protocol_device_info(9)
• struct ipc_protocol_ap_shm(9)
• struct iosm_protocol(9)
• struct ipc_call_msg_send_args(9)
• ipc_protocol_tq_msg_send(9)
• ipc_protocol_suspend(9)
• ipc_protocol_s2idle_sleep(9)
• ipc_protocol_resume(9)
• ipc_protocol_pm_dev_sleep_handle(9)
• ipc_protocol_doorbell_trigger(9)
• ipc_protocol_sleep_notification_string(9)
• ipc_protocol_init(9)
• ipc_protocol_deinit(9)

that's the whole extended friend group right there. go say hi. 💜🦋

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ngl, the file path and the date down there are the actual page footer, so here's the cute sign-off instead of a boring copied line: this lil page lives under ./drivers/net/wwan/iosm, it's dated October 2026, and it goes by ipc_protocol_msg_send(9). mwah. 🍓🧚💖