lpfc_mbox_rsrc_prep(9)

💖 lpfc_mbox_rsrc_prep(9) 💖

okay so welcome to the Kernel API Manual bestie, this is the page for lpfc_mbox_rsrc_prep and honestly it's giving "small function, big responsibilities" energy. let's get into it 🫶

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✨ NAME ✨

lpfc_mbox_rsrc_prep — prep a mailbox with DMA buffer memory. that's it, that's the whole vibe. 🎀

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🌸 SYNOPSIS 🌸

int lpfc_mbox_rsrc_prep (struct lpfc_hba *phba , LPFC_MBOXQ_t *mbox );

literally just two args, no cap. returns an int. she's simple but she's iconic ✨

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🦋 ARGUMENTS 🦋

• phba — pointer to the lpfc hba data structure. your whole adapter lives in there, she's the main character 💅
• mbox — pointer to the driver internal queue element for the mailbox command. this is the actual mailbox slot you're stuffing the command into 📬

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💜 DESCRIPTION 💜

okay so picture this: a mailbox command is made of the pool memory for the command, aka mbox, plus one or more DMA buffers for the data transfer. two separate things, both needed, both besties fr fr.

This routine is basically the standard framework for allocating the dma buffer and assigning it to the mbox. she does the setup so you don't have to. slay 💅

🚨 important: callers should clean up the mbox with a call to lpfc_mbox_rsrc_cleanup. don't leave her hanging, that's rude 😭

Now the lowkey crucial part: the lpfc_mbuf_alloc routine acquires the hbalock, which means the caller is responsible for making sure the hbalock is released. so yeah, you gotta handle that — she's not doing it for you 🙈

Also note (and this is a driver design thing, iykyk): the driver design is a single dmabuf/mbuf per mbox in the ctx_buf. one. just one. no stacking, no greedy vibes 🧚

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/scsi/lpfc/lpfc_mbox.c and honestly the whole friend group is here — every single one of these, no skipping 👑

• 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_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)

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and that's the whole page bestie, go allocate some dma buffers responsibly 💖

🎀 sign-off time: this lil gem comes from ./drivers/scsi/lpfc, dated October 2026, and it's page lpfc_mbox_rsrc_prep(9) of the Kernel API Manual. periodt. 💅✨