lpfc_config_ring(9)

💫 lpfc_config_ring 💫

okay so bestie, we're in the Kernel API Manual today and the star of the show is lpfc_config_ring — no cap, this is the one that preps a mailbox command for configuring an IOCB ring 🎀

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✨ NAME ✨

lpfc_config_ring — prepare a mailbox command for configuring an IOCB ring 💅

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🌸 SYNOPSIS 🌸

void lpfc_config_ring (struct lpfc_hba * phba , int ring , LPFC_MBOXQ_t
* pmb );

like, that's the whole signature, keep it exactly as is 🫶

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🦋 ARGUMENTS 🦋

• phba — pointer to the lpfc_hba data structure. hi bestie, this is your hba 💖
• ring — the ring number / index. which ring are we talking about, iykyk 🌈
• pmb — pointer to the driver internal queue element for the mailbox command. the little carrier pigeon for your mbox ✨

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💜 DESCRIPTION 💜

so the configure ring mailbox command is used to configure an IOCB ring, and honestly? iconic behaviour. this configuration binds from one to six of HBA RC_CTL/TYPE mask entries to the ring. the whole point is mapping incoming sequences to a particular ring — specifically the ring whose RC_CTL/TYPE mask entry matches that of the sequence. main character matching energy fr fr 🔥

⚠️ okay important: the driver should not attempt to configure a ring whose number is greater than the number specified in the Port Control Block (PCB). literally do not.

💀 also, it is an error to issue the configure ring command more than once with the same ring number. and bestie, the HBA will return an error if the driver attempts this. not a vibe. don't do it.

this routine prepares the mailbox command for configuring IOCB ring — that's the whole job, and it ate 👑

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🧚 SEE ALSO 🧚

kernel file ./drivers/scsi/lpfc/lpfc_mbox.c and the whole friend group:

lpfc_mbox_rsrc_prep(9), lpfc_mbox_rsrc_cleanup(9), lpfc_dump_static_vport(9), lpfc_down_link(9), lpfc_dump_mem(9), lpfc_dump_wakeup_param(9), lpfc_read_nv(9), lpfc_config_async(9), lpfc_heart_beat(9), lpfc_read_topology(9), lpfc_clear_la(9), lpfc_config_link(9), lpfc_config_msi(9), lpfc_init_link(9), lpfc_read_sparam(9), lpfc_unreg_did(9), lpfc_read_config(9), lpfc_read_lnk_stat(9), lpfc_reg_rpi(9), lpfc_unreg_login(9), lpfc_sli4_unreg_all_rpis(9), lpfc_reg_vpi(9), lpfc_unreg_vpi(9), lpfc_config_pcb_setup(9), lpfc_read_rev(9), lpfc_build_hbq_profile2(9), lpfc_build_hbq_profile3(9), lpfc_build_hbq_profile5(9), lpfc_config_hbq(9), lpfc_config_port(9), lpfc_kill_board(9), lpfc_mbox_put(9), lpfc_mbox_get(9), __lpfc_mbox_cmpl_put(9), lpfc_mbox_cmpl_put(9), lpfc_mbox_cmd_check(9), lpfc_mbox_dev_check(9), lpfc_mbox_tmo_val(9), lpfc_sli4_mbx_sge_set(9), lpfc_sli4_mbx_sge_get(9), lpfc_sli4_mbox_cmd_free(9), lpfc_sli4_config(9), lpfc_sli4_mbox_rsrc_extent(9), lpfc_sli_config_mbox_subsys_get(9), lpfc_sli_config_mbox_opcode_get(9), lpfc_sli4_mbx_read_fcf_rec(9), lpfc_request_features(9), lpfc_init_vfi(9), lpfc_reg_vfi(9), lpfc_init_vpi(9), lpfc_unreg_vfi(9), lpfc_sli4_dump_cfg_rg23(9), lpfc_reg_fcfi(9), lpfc_reg_fcfi_mrq(9), lpfc_unreg_fcfi(9), lpfc_resume_rpi(9)

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mwah 💋 that's a wrap! this little page lives in ./drivers/scsi/lpfc, dated October 2026 — go off, kernel docs, slay 🌟👑💖