srpt_refresh_port(9)

💅 srpt_refresh_port(9) — like, the whole Kernel API Manual vibe, bestie

okay so real talk, this one lives in the Kernel API Manual and it's called srpt_refresh_port — say that three times fast, I dare you 🫶

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✨ NAME ✨

srpt_refresh_port — get a HCA port all set up and looking cute 💖

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✨ SYNOPSIS ✨

int srpt_refresh_port (struct srpt_port *sport );

that's it. one function. one argument. she's lowkey minimal and I respect it.

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✨ ARGUMENTS ✨

• sport — the SRPT HCA port, aka the main character of this whole operation 👑

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✨ DESCRIPTION ✨

okay so here's the tea 🍵 — this function does three things, and honestly? she ate:

• enables InfiniBand management datagram processing (yes ma'am, the MADs are flowing)
• updates the cached sm_lid, lid and gid values — fresh values, no stale vibes 💅
• registers a callback function for processing MADs on the specified port 🎀

so basically: turn the processing on, refresh the cache, hand over the callback. iconic behavior, no notes. 🌸

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💀 NOTE 💀

it is safe to call this function more than once for the same port. like, genuinely. call it twice. call it three times. she does not care. no cap. 🙈

ngl that's the best kind of API — repeat-call-safe and unbothered 💜

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🌈 SEE ALSO 🌈

first up, the source file herself:

• Kernel file ./drivers/infiniband/ulp/srpt/ib_srpt.c

and now the whole friend group — literally the entire srpt squad, all in (9), all here:

• srpt_event_handler(9), srpt_srq_event(9), srpt_qp_event(9)
• srpt_set_ioc(9), srpt_get_class_port_info(9), srpt_get_iou(9)
• srpt_get_ioc(9), srpt_get_svc_entries(9), srpt_mgmt_method_get(9)
• srpt_mad_send_handler(9), srpt_mad_recv_handler(9), srpt_unregister_mad_agent(9)
• srpt_alloc_ioctx(9), srpt_free_ioctx(9), srpt_alloc_ioctx_ring(9)
• srpt_free_ioctx_ring(9), srpt_set_cmd_state(9), srpt_test_and_set_cmd_state(9)
• srpt_post_recv(9), srpt_zerolength_write(9), srpt_get_desc_tbl(9)
• srpt_init_ch_qp(9), srpt_ch_qp_rtr(9), srpt_ch_qp_rts(9)
• srpt_ch_qp_err(9), srpt_get_send_ioctx(9), srpt_abort_cmd(9)
• srpt_rdma_read_done(9), srpt_build_cmd_rsp(9), srpt_build_tskmgmt_rsp(9)
• srpt_handle_cmd(9), srpt_handle_tsk_mgmt(9), srpt_handle_new_iu(9)
• srpt_send_done(9), srpt_create_ch_ib(9), srpt_close_ch(9)
• srpt_cm_req_recv(9), srpt_cm_rtu_recv(9), srpt_cm_handler(9)
• srpt_queue_response(9), srpt_release_sport(9), srpt_lookup_port(9)
• srpt_add_one(9), srpt_remove_one(9), srpt_close_session(9)
• srpt_parse_i_port_id(9), srpt_make_tpg(9), srpt_drop_tpg(9)
• srpt_make_tport(9), srpt_drop_tport(9), srpt_init_module(9)

fifty of them. FIFTY. that's not a see-also, that's a whole group chat 😭 but they're all linked and they all matter, so go read them, bestie 🦋

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and that's the page!! 🎀 sign-off time: this cutie comes from ./drivers/infiniband/ulp/srpt and she's dated October 2026 — mark your calendars, she's a Libra or something ⭐ iykyk 💅✨