mpt3sas_enable_diag_buffer(9)

💖 mpt3sas_enable_diag_buffer (9) — Kernel API Manual ✨

okay so bestie, welcome to the mpt3sas_enable_diag_buffer(9) page, straight out of the Kernel API Manual 💅 this one's a little cutie, ngl — short but it does something real, so let's get into it 🫶

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🌸 NAME 🌸

mpt3sas_enable_diag_buffer — literally the function that turns on diag_buffers support at driver load time 💖

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✨ SYNOPSIS ✨

void mpt3sas_enable_diag_buffer (struct MPT3SAS_ADAPTER *ioc , u8
bits_to_register );

like, that's the whole signature. no return value, it's giving void energy 👑

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🎀 ARGUMENTS 🎀

• ioc — the per adapter object 🦋 this is your adapter's whole deal, its main character
• bits_to_register — a bitwise field, and here's the map bestie, write it down: trace is bit 0, and snapshot is bit 1 ⭐ so you're basically handing it a little stack of permission slips in binary form, iykyk

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🌈 DESCRIPTION 🌈

So here's the vibe check: this gets called when the command line option diag_buffer_enable is enabled at driver load time 💫 that's it, that's the moment. it's the "hey driver, we're doing the diag buffer thing now" call. no cap, that's the entire description and we're not gonna pretend there's more 🙈

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👑 SEE ALSO 👑

okay so this is the part where the page absolutely pops off — the SEE ALSO list is long and honestly it ate, there are so many friends here 💀 every single one of them, coming right up, and they all live in ./drivers/scsi/mpt3sas/mpt3sas_ctl.c:

• enum block_state(9), _ctl_display_some_debug(9), mpt3sas_ctl_done(9), _ctl_check_event_type(9), mpt3sas_ctl_add_to_event_log(9), mpt3sas_ctl_event_callback(9), _ctl_verify_adapter(9), mpt3sas_ctl_pre_reset_handler(9), mpt3sas_ctl_clear_outstanding_ioctls(9), mpt3sas_ctl_reset_done_handler(9)
• _ctl_fasync(9), _ctl_poll(9), _ctl_set_task_mid(9), _ctl_send_mctp_passthru_req(9), _ctl_do_mpt_command(9), _ctl_getiocinfo(9), _ctl_eventquery(9), _ctl_eventenable(9), _ctl_eventreport(9), _ctl_do_reset(9)
• _ctl_btdh_search_sas_device(9), _ctl_btdh_search_pcie_device(9), _ctl_btdh_search_raid_device(9), _ctl_btdh_mapping(9), _ctl_diag_capability(9), _ctl_diag_get_bufftype(9), _ctl_diag_register_2(9), _ctl_diag_register(9), _ctl_diag_unregister(9), _ctl_diag_query(9)
• mpt3sas_send_diag_release(9), _ctl_diag_release(9), _ctl_diag_read_buffer(9), _ctl_addnl_diag_query(9), _ctl_enable_diag_sbr_reload(9), _ctl_compat_mpt_command(9), _ctl_ioctl_main(9), _ctl_get_mpt_mctp_passthru_adapter(9), mpt3sas_get_device_count(9), _ctl_ioctl(9)
• _ctl_mpt2_ioctl(9), _ctl_ioctl_compat(9), _ctl_mpt2_ioctl_compat(9), version_fw_show(9), version_bios_show(9), version_mpi_show(9), version_product_show(9), version_nvdata_persistent_show(9), version_nvdata_default_show(9), board_name_show(9)
• board_assembly_show(9), board_tracer_show(9), io_delay_show(9), device_delay_show(9), fw_queue_depth_show(9), host_sas_address_show(9), logging_level_show(9), fwfault_debug_show(9), ioc_reset_count_show(9), reply_queue_count_show(9)
• BRM_status_show(9), host_trace_buffer_size_show(9), host_trace_buffer_show(9), host_trace_buffer_enable_show(9), diag_trigger_master_show(9), diag_trigger_master_store(9), diag_trigger_event_show(9), diag_trigger_event_store(9), diag_trigger_scsi_show(9), diag_trigger_scsi_store(9)
• diag_trigger_mpi_show(9), diag_trigger_mpi_store(9), drv_support_bitmap_show(9), enable_sdev_max_qd_show(9), enable_sdev_max_qd_store(9), sas_address_show(9), sas_device_handle_show(9), sas_ncq_prio_supported_show(9), sas_ncq_prio_enable_show(9)
• mpt3sas_ctl_init(9), mpt3sas_ctl_release(9), mpt3sas_ctl_exit(9)

like… that's a lot of friends and every single one of them made the guest list 💜 no gatekeeping here fr fr

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💀 heads up bestie: the descriptions on this page are exactly as slim as the original — one sentence, no lore, no hidden extras. don't go reading behaviour into it that isn't written down, okay? mwah 🫶

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and that's the page!! 🦋 this gem lives over in ./drivers/scsi/mpt3sas, dated October 2026, and it's filed under mpt3sas_enable_diag_buffer(9) — bestie we are SO done here, go enable some diag buffers, periodt 💅✨🎀