ufshcd_read_desc_param(9)

💖 ufshcd_read_desc_param(9) — Kernel API Manual 💖

okay so bestie, welcome to the group chat ✨ this is the manual page for ufshcd_read_desc_param(9), and we're about to read the specified descriptor parameter together. it's giving kernel API precision, no cap 💅

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💖 NAME 💖

ufshcd_read_desc_param — read the specified descriptor parameter 🎀

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✨ SYNOPSIS ✨

here's the signature, character for character, don't @ me:

int ufshcd_read_desc_param (struct ufs_hba *hba , enum desc_idn desc_id
, int desc_index , u8 param_offset , u8 *param_read_buf , u8 param_size
);

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🎀 ARGUMENTS 🎀

• hba — pointer to adapter instance. it's the main character of this call, honestly 🫶
• desc_id — descriptor idn value, exactly as written 💖
• desc_index — descriptor index, the little number bestie 🔢
• param_offset — offset of the parameter to read, so we know where to look 👀
• param_read_buf — pointer to buffer where parameter would be read 🧺
• param_size — sizeof(param_read_buf), the size tea ☕

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🌈 RETURN 🌈

vibe check on the return value:

• 0 upon success — slay ✨
• > 0 in case the UFS device reported an OCS error — noted, bestie 😭
• < 0 if another error occurred — different error, same drama 💀

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👑 SEE ALSO 👑

okay bestie, this is the massive friend group of related kernel symbols, and every single one is here — the whole list, no skips, no cap:

Kernel file ./drivers/ufs/core/ufshcd.c 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), struct
uc_string_id(9), ufshcd_read_string_desc(9),
ufshcd_read_unit_desc_param(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)

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that's the whole tea, bestie 🫶 source/version: ./drivers/ufs/core · date: October 2026 💅✨