megasas_build_dcdb(9)
π megasas_build_dcdb(9) β a Kernel API Manual moment
okay so bestie, welcome to megasas_build_dcdb(9), a page from the Kernel API Manual, and honestly? she's a little function with one job and she does it. no notes. π
β¨ NAME β¨
megasas_build_dcdb β prepares a direct cdb (DCDB) command π¦
β¨ SYNOPSIS β¨
int megasas_build_dcdb (struct megasas_instance *instance , struct
scsi_cmnd *scp , struct megasas_cmd *cmd );
like yes that's the whole signature, no cap, three args, returns an int, that's her π
β¨ ARGUMENTS β¨
instanceβ the adapter soft state, aka where the megasas instance lives. your main character struct fr πscpβ the SCSI command. the actual vibe check of what we're doing here. πΈcmdβ the command that's gonna be prepared in. she's the blank canvas, we're about to fill her in. β¨
β¨ DESCRIPTION β¨
okay so real talk: this function prepares CDB commands. and likeβ¦ these are typically pass-through commands to the devices. that's it. that's the whole lore. π«Ά
think of it as the little setup moment before the command goes out into the world β she's doing the prep work so the CDB command is ready to slay π₯
β¨ SEE ALSO β¨
the kernel file that this all lives in, iconically:
./drivers/scsi/megaraid/megaraid_sas_base.c
and then the whole extended universe of friends π§ β every single one of them, gathered here, no gatekeeping:
megasas_set_dma_settings(9)megasas_get_cmd(9)megasas_return_cmd(9)megasas_decode_evt(9)megasas_enable_intr_xscale(9)megasas_disable_intr_xscale(9)megasas_read_fw_status_reg_xscale(9)megasas_clear_intr_xscale(9)megasas_fire_cmd_xscale(9)megasas_adp_reset_xscale(9)megasas_check_reset_xscale(9)megasas_enable_intr_ppc(9)megasas_disable_intr_ppc(9)megasas_read_fw_status_reg_ppc(9)megasas_clear_intr_ppc(9)megasas_fire_cmd_ppc(9)megasas_check_reset_ppc(9)megasas_enable_intr_skinny(9)megasas_disable_intr_skinny(9)megasas_read_fw_status_reg_skinny(9)megasas_clear_intr_skinny(9)megasas_fire_cmd_skinny(9)megasas_check_reset_skinny(9)megasas_enable_intr_gen2(9)megasas_disable_intr_gen2(9)megasas_read_fw_status_reg_gen2(9)megasas_clear_intr_gen2(9)megasas_fire_cmd_gen2(9)megasas_adp_reset_gen2(9)megasas_check_reset_gen2(9)megasas_issue_polled(9)megasas_issue_blocked_cmd(9)megasas_issue_blocked_abort_cmd(9)megasas_make_sgl32(9)megasas_make_sgl64(9)megasas_make_sgl_skinny(9)megasas_build_ldio(9)megasas_cmd_type(9)megasas_queue_command(9)megasas_complete_cmd_dpc(9)megasas_start_timer(9)megasas_wait_for_outstanding(9)megasas_generic_reset(9)megasas_reset_timer(9)megasas_dump(9)megasas_dump_reg_set(9)megasas_dump_fusion_io(9)megasas_reset_bus_host(9)megasas_task_abort(9)megasas_reset_target(9)megasas_bios_param(9)megasas_service_aen(9)megasas_complete_int_cmd(9)megasas_complete_abort(9)megasas_complete_cmd(9)megasas_issue_pending_cmds_again(9)megasas_deplete_reply_queue(9)megasas_isr(9)megasas_transition_to_ready(9)megasas_teardown_frame_pool(9)megasas_create_frame_pool(9)megasas_free_cmds(9)megasas_alloc_cmds(9)megasas_ld_list_query(9)megasas_host_device_list_query(9)megasas_get_ctrl_info(9)megasas_issue_init_mfi(9)megasas_setup_irqs_msix(9)megasas_setup_jbod_map(9)megasas_get_device_list(9)megasas_set_high_iops_queue_affinity_and_hint(9)megasas_alloc_irq_vectors(9)megasas_init_fw(9)megasas_release_mfi(9)megasas_get_seq_num(9)megasas_register_aen(9)megasas_start_aen(9)megasas_io_attach(9)megasas_set_dma_mask(9)megasas_alloc_ctrl_mem(9)megasas_alloc_ctrl_dma_buffers(9)megasas_probe_one(9)megasas_flush_cache(9)megasas_shutdown_controller(9)megasas_suspend(9)megasas_resume(9)megasas_detach_one(9)megasas_shutdown(9)megasas_mgmt_fw_ioctl(9)megasas_mgmt_ioctl(9)megasas_update_device_list(9)megasas_add_remove_devices(9)megasas_init(9)megasas_exit(9)
iykyk, that's the whole friend group and they're all iconic π
and that's the page bestie!! π₯³ one last lil receipt for you: this cutie comes from the source ./drivers/scsi/megaraid, dated October 2026, and it's filed under megasas_build_dcdb(9). periodt. π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms