recv_hbm(9)

💅 recv_hbm(9) — like, the Kernel API Manual page you didn't know you needed

okay so bestie, welcome to recv_hbm(9) from the Kernel API Manual — this is the lil entry point where HBM messages come in and get handled. it's short, it's sweet, it's giving gateway energy ✨

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🌸 NAME 🌸

recv_hbm — Receive HBM message 🫶

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✨ SYNOPSIS ✨

void    recv_hbm (struct ishtp_device *dev , struct ishtp_msg_hdr
*ishtp_hdr );

no cap, that's the whole signature. two args, void return, iconic behavior 💅

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🎀 ARGUMENTS 🎀

• dev — the ISHTP device instance, aka the main character of this whole operation 👑
• ishtp_hdr — the received bus message, like the actual mail that just landed in the inbox 📬

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🦋 DESCRIPTION 🦋

so what it does: it receives and processes ISHTP bus messages in ISR context. that's interrupt service routine context, iykyk — so it's gotta be quick about it.

and the way it handles that is lowkey elegant: instead of doing the whole job right there in the interrupt, it schedules a work function to process the message later. highkey the correct move honestly. don't do heavy lifting in ISR context, bestie, that's a whole vibe check you don't want to fail 😭

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/hid/intel-ish-hid/ishtp/hbm.c
• ishtp_hbm_fw_cl_allocate(9)
• ishtp_hbm_cl_hdr(9)
• ishtp_hbm_cl_addr_equal(9)
• ishtp_hbm_start_wait(9)
• ishtp_hbm_start_req(9)
• ishtp_hbm_enum_clients_req(9)
• ishtp_hbm_prop_req(9)
• ishtp_hbm_stop_req(9)
• ishtp_hbm_cl_flow_control_req(9)
• ishtp_hbm_cl_disconnect_req(9)
• ishtp_hbm_cl_disconnect_res(9)
• ishtp_hbm_cl_connect_req(9)
• ishtp_hbm_cl_connect_res(9)
• ishtp_hbm_fw_disconnect_req(9)
• ishtp_hbm_dma_xfer_ack(9)
• ishtp_hbm_dma_xfer(9)
• ishtp_hbm_dispatch(9)
• bh_hbm_work_fn(9)
• ishtp_loader_recv_msg(9)
• recv_fixed_cl_msg(9)
• fix_cl_hdr(9)
• ishtp_send_suspend(9)
• ishtp_send_resume(9)
• ishtp_query_subscribers(9)

like, the whole friend group fr fr 🌈

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ngl the list above is long but every single one of them is a real one — go read them, they ate 🔥

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and that's the page!! this one lives in ./drivers/hid/intel-ish-hid/ishtp and the version vibes are dated October 2026, brought to you by recv_hbm(9) — mwah, slay, periodt 💖🎀🦋