ufshcd_read_unit_desc_param(9)

💅 ufshcd_read_unit_desc_param(9) — Kernel API Manual 🎀

okay so bestie, welcome to the Kernel API Manual page for ufshcd_read_unit_desc_param(9) — yes that name is a mouthful, yes it's iconic, no we're not shortening it. it does exactly one thing and it does it slayfully: reads the specified unit descriptor parameter. that's it. that's the whole vibe. ✨

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🌸 NAME 🌸

ufshcd_read_unit_desc_param — read the specified unit descriptor parameter

fr fr that's the whole job description. no cap.

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🦋 SYNOPSIS 🦋

int ufshcd_read_unit_desc_param (struct ufs_hba *hba , int lun , enum
unit_desc_param param_offset , u8 *param_read_buf , u32 param_size );

look at her. five arguments, returns an int, main character energy honestly. 💅

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💖 ARGUMENTS 💖

• hba — Pointer to adapter instance 🫶 this is your whole UFS host bus adapter babe, everything runs through her
• lun — lun id. yes, that's just "lun id", lowercase and mysterious, we love that for her
• param_offset — offset of the parameter to read. so like, which parameter, numerically. very demure, very precise ✨
• param_read_buf — pointer to buffer where parameter would be read 📥 that's where the tea gets written
• param_size — sizeof(param_read_buf) 🎀 the size of the buffer, obviously, so she knows how much to write

real talk: pass a buffer that actually matches param_size. the manpage says param_size is sizeof(param_read_buf) and we are literally taking it at its word. 🙈

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⭐ RETURN ⭐

• 0 in case of success 💚 slay, nothing to see here, we move
• < 0 upon failure 💀 not slay, something went wrong, go check

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🧚 SEE ALSO 🧚

the kernel file is ./drivers/ufs/core/ufshcd.c — that's the source of truth bestie, go read it, it's giving "I contain multitudes" 👑

and here's the whole friend group, all (9) manpages, in exactly the order the page gives them because we respect the canon:

ufshcd_enable_intr(9), ufshcd_disable_intr(9), ufshcd_print_trs_all(9), ufshcd_print_pwr_info(9), ufshcd_wait_for_register(9), ufshcd_get_intr_mask(9), ufshcd_get_ufs_version(9), ufshcd_is_device_present(9), ufshcd_get_tr_ocs(9), ufshcd_utrl_clear(9), ufshcd_utmrl_clear(9), ufshcd_get_lists_status(9), ufshcd_get_req_rsp(9), ufshcd_is_exception_event(9), ufshcd_reset_intr_aggr(9), ufshcd_config_intr_aggr(9), ufshcd_disable_intr_aggr(9), ufshcd_enable_run_stop_reg(9), ufshcd_hba_start(9), ufshcd_is_hba_active(9), ufshcd_pm_qos_init(9), ufshcd_pm_qos_exit(9), ufshcd_pm_qos_update(9), ufshcd_set_clk_freq(9), ufshcd_scale_clks(9), ufshcd_is_devfreq_scaling_required(9), ufshcd_pause_command_processing(9), ufshcd_resume_command_processing(9), ufshcd_scale_gear(9), ufshcd_devfreq_scale(9), ufshcd_hold(9), ufshcd_send_command(9), ufshcd_copy_sense_data(9), ufshcd_copy_query_response(9), ufshcd_hba_capabilities(9), ufshcd_ready_for_uic_cmd(9), ufshcd_get_upmcrs(9), ufshcd_dispatch_uic_cmd(9), ufshcd_wait_for_uic_cmd(9), __ufshcd_send_uic_cmd(9), ufshcd_send_uic_cmd(9), ufshcd_sgl_to_prdt(9), ufshcd_map_sg(9), ufshcd_prepare_req_desc_hdr(9), ufshcd_prepare_utp_scsi_cmd_upiu(9), ufshcd_prepare_utp_query_req_upiu(9), ufshcd_compose_devman_upiu(9), ufshcd_comp_scsi_upiu(9), ufshcd_upiu_wlun_to_scsi_wlun(9), ufshcd_queuecommand(9), ufshcd_dev_cmd_completion(9), ufshcd_exec_dev_cmd(9), ufshcd_init_query(9), ufshcd_query_flag(9), ufshcd_query_attr(9), ufshcd_query_attr_retry(9), ufshcd_query_attr_qword(9), ufshcd_query_descriptor_retry(9), ufshcd_read_desc_param(9), struct uc_string_id(9), ufshcd_read_string_desc(9), ufshcd_memory_alloc(9), ufshcd_host_memory_configure(9), ufshcd_dme_link_startup(9), ufshcd_dme_reset(9), ufshcd_dme_enable(9), ufshcd_dme_set_attr(9), ufshcd_dme_get_attr(9), ufshcd_dme_rmw(9), ufshcd_uic_pwr_ctrl(9), ufshcd_uic_tx_eqtr(9), ufshcd_send_bsg_uic_cmd(9), ufshcd_uic_change_pwr_mode(9), ufshcd_get_max_pwr_mode(9), ufshcd_dme_change_power_mode(9), ufshcd_change_power_mode(9), ufshcd_config_pwr_mode(9), ufshcd_complete_dev_init(9), ufshcd_make_hba_operational(9), ufshcd_hba_stop(9), ufshcd_hba_execute_hce(9), ufshcd_link_startup(9), ufshcd_verify_dev_init(9), ufshcd_setup_links(9), ufshcd_lu_init(9), ufshcd_sdev_init(9), ufshcd_change_queue_depth(9), ufshcd_sdev_configure(9), ufshcd_sdev_destroy(9), ufshcd_scsi_cmd_status(9), ufshcd_transfer_rsp_status(9), ufshcd_uic_cmd_compl(9), ufshcd_compl_one_cqe(9), __ufshcd_transfer_req_compl(9), ufshcd_mcq_compl_pending_transfer(9), ufshcd_transfer_req_compl(9), ufshcd_disable_ee(9), ufshcd_enable_ee(9), ufshcd_enable_auto_bkops(9), ufshcd_disable_auto_bkops(9), ufshcd_force_reset_auto_bkops(9), ufshcd_bkops_ctrl(9), ufshcd_exception_event_handler(9), ufshcd_quirk_dl_nac_errors(9), ufshcd_abort_all(9), ufshcd_err_handler(9), ufshcd_update_uic_error(9), ufshcd_check_errors(9), ufshcd_tmc_handler(9), ufshcd_handle_mcq_cq_events(9), ufshcd_sl_intr(9), ufshcd_intr(9), ufshcd_issue_tm_cmd(9), ufshcd_issue_devman_upiu_cmd(9), ufshcd_exec_raw_upiu_cmd(9), ufshcd_advanced_rpmb_req_handler(9), ufshcd_eh_device_reset_handler(9), ufshcd_try_to_abort_task(9), ufshcd_abort(9), ufshcd_process_probe_result(9), ufshcd_host_reset_and_restore(9), ufshcd_reset_and_restore(9), ufshcd_eh_host_reset_handler(9), ufshcd_get_max_icc_level(9), ufshcd_find_max_sup_active_icc_level(9), ufshcd_scsi_add_wlus(9), ufshcd_create_device_id(9), ufshcd_quirk_tune_host_pa_tactivate(9), ufshcd_quirk_override_pa_h8time(9), ufshcd_add_lus(9), ufshcd_get_op_mode(9), ufshcd_probe_hba(9), ufshcd_async_scan(9), ufshcd_set_dev_pwr_mode(9), ufshcd_suspend(9), ufshcd_resume(9), ufshcd_system_suspend(9), ufshcd_system_resume(9), ufshcd_runtime_suspend(9), ufshcd_runtime_resume(9), ufshcd_remove(9), ufshcd_set_dma_mask(9), ufshcd_devres_release(9), ufshcd_alloc_host(9), ufshcd_init(9)

like I said. whole friend group. iykyk 🫶

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okay that's the page bestie, thanks for coming to my ted talk 💜

this cutie lives in ./drivers/ufs/core and the page is dated October 2026 — don't forget to check the date before you cite her, periodt. 📅✨🍓