mei_hbm_add...w_ctrl_creds(9)

🌸 mei_hbm_add_single_tx_flow_ctrl_creds — Kernel API Manual ✨

okay so bestie, this is a page from the Kernel API Manual, and it's about one (1) tiny little function that hands out buffer credentials like they're wristbands at a party 💅 don't let the truncated header freak you out, the real name is right below, iykyk.

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💖 NAME 💖

mei_hbm_add_single_tx_flow_ctrl_creds — no cap, this one literally adds single buffer credentials. that's the whole vibe. one buffer, one set of creds, slay.

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✨ SYNOPSIS ✨

int mei_hbm_add_single_tx_flow_ctrl_creds (struct mei_device *dev ,
struct hbm_flow_control *fctrl );

it gives back an int — remember that, it matters for the RETURN section, don't scroll past it 🙈

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🎀 ARGUMENTS 🎀

• dev — the device structure. it's giving "main character energy" — everything happens through this one 🫶
• fctrl — flow control response bus message. this is the message carrying the flow-control tea ☕

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🦋 RETURN 🦋

• 0 on success 🌈
• < 0 otherwise 😭

that's it, that's the whole return contract — zero means we ate, negative means we did not.

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👑 SEE ALSO 👑

the kernel file this lives in is ./drivers/misc/mei/hbm.c, and honestly the whole friend group is here — go say hi 🫶

• mei_cl_conn_status_to_errno(9)
• mei_hbm_write_message(9)
• mei_hbm_idle(9)
• mei_hbm_reset(9)
• mei_hbm_hdr(9)
• mei_hbm_cl_hdr(9)
• mei_hbm_cl_write(9)
• mei_hbm_cl_addr_equal(9)
• mei_hbm_cl_find_by_cmd(9)
• mei_hbm_start_wait(9)
• mei_hbm_start_req(9)
• mei_hbm_dma_setup_req(9)
• mei_hbm_capabilities_req(9)
• mei_hbm_enum_clients_req(9)
• mei_hbm_me_cl_add(9)
• mei_hbm_add_cl_resp(9)
• mei_hbm_fw_add_cl_req(9)
• mei_hbm_cl_notify_req(9)
• notify_res_to_fop(9)
• mei_hbm_cl_notify_start_res(9)
• mei_hbm_cl_notify_stop_res(9)
• mei_hbm_cl_notify(9)
• mei_hbm_cl_dma_map_req(9)
• mei_hbm_cl_dma_unmap_req(9)
• mei_hbm_prop_req(9)
• mei_hbm_pg(9)
• mei_hbm_stop_req(9)
• mei_hbm_cl_flow_control_req(9)
• mei_hbm_cl_tx_flow_ctrl_creds_res(9)
• mei_hbm_cl_disconnect_req(9)
• mei_hbm_cl_disconnect_rsp(9)
• mei_hbm_cl_disconnect_res(9)
• mei_hbm_cl_connect_req(9)
• mei_hbm_cl_connect_res(9)
• mei_hbm_cl_res(9)
• mei_hbm_fw_disconnect_req(9)
• mei_hbm_pg_enter_res(9)
• mei_hbm_pg_resume(9)
• mei_hbm_pg_exit_res(9)
• mei_hbm_config_features(9)
• mei_hbm_version_is_supported(9)
• mei_hbm_dispatch(9)

fr fr, that's the entire list — if you were looking for a shortcut, there isn't one, and that's iconic of the kernel honestly 💀

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💖 and that's the page!! 💖 it came to you from ./drivers/misc/mei, dated October 2026, and it's filed under mei_hbm_add...w_ctrl_creds(9) — yes the header is truncated, no we're not fixing it, it's part of the lore now. go forth and add those single buffer creds, bestie 🎀🦋✨