fw_queue_depth_show(9)

💖 fw_queue_depth_show(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the vibe, we're in the kernel docs now, and this little page is all about fw_queue_depth_show(9). grab a strawberry 🍓 and let's go.

---

✨ NAME ✨

fw_queue_depth_show — global credits

like, yeah, that's literally all it says. global credits. iconic and mysterious. periodt. 👑

---

🌸 SYNOPSIS 🌸

ssize_t fw_queue_depth_show (struct device *cdev , struct
device_attribute *attr , char *buf );

look at her. three args, returns a ssize_t, absolutely slaying the sysfs show-function format. 💅

---

🎀 ARGUMENTS 🎀

• cdev — pointer to embedded class device 🫶
• attr — ? ... yeah. that's it. that's the whole description. a literal question mark. and honestly? mood. not me relating to a kernel doc that just goes "?" 😭
• buf — the buffer returned ⭐

---

🦋 DESCRIPTION 🦋

This is firmware queue depth limit. that's the whole thing, no cap.

It's a sysfs 'read-only' shost attribute — so like, it's read-only, bestie, do not try to write to it, that's not her job. 🙈

---

💜 SEE ALSO 💜

okay this part is unhinged (affectionate) — it's a whole friend group, everyone's invited, the guest list is huge:

Kernel file ./drivers/scsi/mpt3sas/mpt3sas_ctl.c, plus:

• 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)
• mpt3sas_enable_diag_buffer(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)
• 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 I said. everyone. the whole extended family showed up to the function-call party. 🔥

---

🧚 a lil sign-off 🧚

this page lives in ./drivers/scsi/mpt3sas and the version vibe is dated October 2026. mwah, go read your sysfs attributes responsibly, bestie. 💋✨

ngl the attr argument being documented as ? is sending me 💀 — but I'm reporting it faithfully, because that's literally what the page says. iykyk.