lpfc_dump_mem(9)

💖 lpfc_dump_mem — the <rainbow>kernel API manual</rainbow> page, bestie edition 💖

okay so you found lpfc_dump_mem(9) in the Kernel API Manual and you're like "what is this" — don't worry, I got you 🫶 this whole page is about prepping a mailbox command so the driver can read a region off the HBA. it's giving "setup era, not actually do-the-thing era" ✨ and honestly? iconic behavior.

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✨ NAME ✨

lpfc_dump_mem — prepare a mailbox command for reading a region 💅

like, that's the whole job. prepare. the mailbox command is the main character, this function is just doing its hair and makeup before it goes on stage 🎀

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✨ SYNOPSIS ✨

void lpfc_dump_mem (struct lpfc_hba *phba , LPFC_MBOXQ_t *pmb , uint16_t
offset , uint16_t region_id );

returns void, so no "did it work" report back, she just does the thing and dips 😌

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✨ ARGUMENTS ✨

• phba — pointer to the lpfc_hba data structure. that's your hba's whole personality file, fr fr 🦋
• pmb — pointer to the driver internal queue element for the mailbox command. this is the mailbox command's little home 🏠
• offset — offset into the region. uint16_t, so keep it smol 🌸
• region_id — config region id. also uint16_t 💜

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✨ DESCRIPTION ✨

so the dump mailbox command is the whole method the device driver uses to get various types of information off the HBA device 👑 like, that's the vibe: driver asks, HBA gives info, everyone slays.

and this routine specifically? it prepares the mailbox command for dumping the HBA's config region 💾✨ it doesn't dump it itself — it does the prep. the setup. the getting-ready-with-me energy. no cap.

lowkey important to remember: prepare ≠ perform. this is the getting-ready part, bestie 💅

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✨ SEE ALSO ✨

the kernel file lives at ./drivers/scsi/lpfc/lpfc_mbox.c (iykyk), and here's the whole friend group — every single one, not skipping a single member of the squad 😤:

lpfc_mbox_rsrc_prep(9), lpfc_mbox_rsrc_cleanup(9), lpfc_dump_static_vport(9), lpfc_down_link(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_ring(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)

also peep that __lpfc_mbox_cmpl_put(9) with the double underscore at the front — yes that's really how it's spelled, don't come for me 🙈

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and that's the page!! 🎀 quick sign-off for the record: this one comes from ./drivers/scsi/lpfc, dated October 2026, and the page itself is lpfc_dump_mem(9) — go prep that mailbox command, bestie, you're gonna eat 🔥💜