mpt3sas_con...s_iounit_pg0(9)

💅 mpt3sas_config_get_sas_iounit_pg0 — bestie edition

okay so this is a page straight outta the Kernel API Manual and it's about mpt3sas_config_get_sas_iounit_pg0(9) — yes that's the whole vibe, the title is literally the function name, no notes 💖

✨ NAME ✨

mpt3sas_config_get_sas_iounit_pg0 — you're here to obtain sas iounit page 0 🌸 that's the whole errand, that's the assignment.

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🦋 SYNOPSIS 🦋

int mpt3sas_config_get_sas_iounit_pg0 (struct MPT3SAS_ADAPTER *ioc ,
Mpi2ConfigReply_t *mpi_reply , Mpi2SasIOUnitPage0_t *config_page , u16
sz );

like, she takes four things and gives you back an int. iconic behavior, honestly 💅

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🎀 ARGUMENTS 🎀

• ioc — the per adapter object 🫶 your main character, lowkey. the whole adapter lives in here.
• mpi_reply — the reply mf payload returned from firmware 😭 "mf" is doing a lot of work here but yes, it's the reply payload that firmware hands back to you.
• config_page — the contents of the config page ✨ this is where the page data goes.
• sz — the size of the buffer you passed in config_page 📏 gotta know how big the container is, no cap.

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⭐ CONTEXT ⭐

sleep. 😴 that's it. that's the context. this function can sleep, so don't you dare call it from somewhere spicy — sleep-friendly context only, fr fr.

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🔥 DESCRIPTION 🔥

okay so here's the thing you absolutely cannot skip: the calling function should call config_get_number_hba_phys prior to this function 💯 that way enough memory is allocated for config_page. like, you gotta know the count before you can size the page properly. do it in that order. periodt.

warning bestie: skip the config_get_number_hba_phys step and your config_page buffer might not be big enough — that's literally the one rule the manpage gives you 🙈

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🌈 RETURN 🌈

0 for success, non-zero for failure 💖 that's it. zero means slay, anything else means something went sideways.

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👑 SEE ALSO 👑

it's in the kernel file ./drivers/scsi/mpt3sas/mpt3sas_config.c — go read the source if you want the full lore 🔍 and here's the whole friend group, no one left behind:

struct config_request(9), _config_display_some_debug(9), _config_alloc_config_dma_memory(9), _config_free_config_dma_memory(9), mpt3sas_config_done(9), _config_request(9), mpt3sas_config_get_manufacturing_pg0(9), mpt3sas_config_get_manufacturing_pg1(9), mpt3sas_config_get_manufacturing_pg10(9), mpt3sas_config_get_manufacturing_pg11(9), mpt3sas_config_set_manufacturing_pg11(9), mpt3sas_config_get_bios_pg2(9), mpt3sas_config_get_bios_pg3(9), mpt3sas_config_set_bios_pg4(9), mpt3sas_config_get_bios_pg4(9), mpt3sas_config_get_iounit_pg0(9), mpt3sas_config_get_iounit_pg1(9), mpt3sas_config_set_iounit_pg1(9), mpt3sas_config_get_iounit_pg3(9), mpt3sas_config_get_iounit_pg7(9), mpt3sas_config_get_iounit_pg8(9), mpt3sas_config_get_ioc_pg8(9), mpt3sas_config_get_ioc_pg1(9), mpt3sas_config_set_ioc_pg1(9), mpt3sas_config_get_sas_device_pg0(9), mpt3sas_config_get_pcie_device_pg0(9), mpt3sas_config_get_pcie_iounit_pg1(9), mpt3sas_config_get_pcie_device_pg2(9), mpt3sas_config_get_number_hba_phys(9), mpt3sas_config_get_sas_iounit_pg1(9), mpt3sas_config_set_sas_iounit_pg1(9), mpt3sas_config_get_expander_pg0(9), mpt3sas_config_get_expander_pg1(9), mpt3sas_config_get_enclosure_pg0(9), mpt3sas_config_get_phy_pg0(9), mpt3sas_config_get_phy_pg1(9), mpt3sas_config_get_raid_volume_pg1(9), mpt3sas_config_get_number_pds(9), mpt3sas_config_get_raid_volume_pg0(9), mpt3sas_config_get_phys_disk_pg0(9), mpt3sas_config_get_driver_trigger_pg0(9), _config_set_driver_trigger_pg0(9), mpt3sas_config_update_driver_trigger_pg0(9), mpt3sas_config_get_driver_trigger_pg1(9), _config_set_driver_trigger_pg1(9), mpt3sas_config_update_driver_trigger_pg1(9), mpt3sas_config_get_driver_trigger_pg2(9), _config_set_driver_trigger_pg2(9), mpt3sas_config_update_driver_trigger_pg2(9), mpt3sas_config_get_driver_trigger_pg3(9), _config_set_driver_trigger_pg3(9), mpt3sas_config_update_driver_trigger_pg3(9), mpt3sas_config_get_driver_trigger_pg4(9), _config_set_driver_trigger_pg4(9), mpt3sas_config_update_driver_trigger_pg4(9), mpt3sas_config_get_volume_handle(9), mpt3sas_config_get_volume_wwid(9) 💜

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and that's the page!! 🧚 this lil beauty lives under ./drivers/scsi/mpt3sas and it's dated October 2026 — save the date, bestie 🎀✨