ipc_protocol...d_tail_index(9)

💅 ipc_protocol_get_head_tail_index(9) — Kernel API Manual ✨

okay so bestie, welcome to the <rainbow>Kernel API Manual</rainbow> entry for ipc_protocol...d_tail_index(9) — yes the title got truncated, it's giving ✂️ but we move. the actual function we're obsessing over is ipc_protocol_get_head_tail_index, and it's literally just here to hand you the head and tail pointer indexes of a given pipe. that's it. that's the whole vibe. 🎀

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✨ NAME ✨

ipc_protocol_get_head_tail_index — the function for getting the Head and Tail pointer index of a given pipe 🫶

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🌸 SYNOPSIS 🌸

void ipc_protocol_get_head_tail_index (struct iosm_protocol
*ipc_protocol , struct ipc_pipe *pipe , u32 *head , u32 *tail );

notice it returns void?? yeah she's not giving you a return value, she's giving you pointers. main character energy fr fr. 💅

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🦋 ARGUMENTS 🦋

• ipc_protocol — your iosm_protocol instance, the whole squad's context, no cap.
• pipe — the Pipe Instance. the specific pipe we're snooping on 🔍
• head — the head pointer index of the given pipe. she's the front of the line, periodt.
• tail — the tail pointer index of the given pipe. she's bringing up the rear, iconic behaviour honestly 🙈

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👑 SEE ALSO 👑

bestie there is a whole extended universe here, so buckle up, grab a strawberry 🍓, and let's get into it:

• Kernel file ./drivers/net/wwan/iosm/iosm_ipc_protocol_ops.h
• enum ipc_mem_td_cs(9)
• enum ipc_mem_msg_cs(9)
• struct ipc_msg_prep_args_pipe(9)
• struct ipc_msg_prep_args_sleep(9)
• struct ipc_msg_prep_feature_set(9)
• struct ipc_msg_prep_map(9)
• struct ipc_msg_prep_unmap(9)
• union ipc_msg_prep_args(9)
• enum ipc_msg_prep_type(9)
• struct ipc_rsp(9)
• enum ipc_mem_msg(9)
• struct ipc_mem_msg_open_pipe(9)
• struct ipc_mem_msg_close_pipe(9)
• struct ipc_mem_msg_abort_pipe(9)
• struct ipc_mem_msg_host_sleep(9)
• struct ipc_mem_msg_feature_set(9)
• struct ipc_mem_msg_common(9)
• union ipc_mem_msg_entry(9)
• ipc_protocol_msg_prep(9)
• ipc_protocol_msg_hp_update(9)
• ipc_protocol_msg_process(9)
• ipc_protocol_ul_td_send(9)
• ipc_protocol_ul_td_process(9)
• ipc_protocol_dl_td_prepare(9)
• ipc_protocol_dl_td_process(9)
• ipc_protocol_get_ipc_status(9)
• ipc_protocol_pipe_cleanup(9)
• ipc_protocol_get_ap_exec_stage(9)
• ipc_protocol_pm_dev_get_sleep_notification(9)

like, that's a full friend group right there 😭 every single one of them is in the ./drivers/net/wwan/iosm cinematic universe, iykyk. go read them too, they're all slay in their own way 🔥

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ngl, this page is short and sweet — no warnings, no bugs to report, no environment variables, no exit statuses, nothing cursed. just a void function doing her little job. 💜

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okay that's the whole page, bestie — ily, go forth and index those pointers 🧚‍♀️

signed off with love from the source tree 🌈 ./drivers/net/wwan/iosm, dated October 2026, and yes the footer stubbornly still says ipc_protocol...d_tail_index(9) — she's committed to the bit 💀💖