megasas_build_ldio_fusion(9)

💅 megasas_build_ldio_fusion — from the Kernel API Manual, bestie

Okay so this is a page straight out of the Kernel API Manual, and the star of the show is megasas_build_ldio_fusion(9). Buckle up, we're getting into driver guts and honestly? It's giving main character energy. ✨

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🌸 NAME 🌸

megasas_build_ldio_fusion — literally the function that prepares IOs to devices. That's the whole vibe. 🎀

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🦋 SYNOPSIS 🦋

void megasas_build_ldio_fusion (struct megasas_instance *instance ,
struct scsi_cmnd *scp , struct megasas_cmd_fusion *cmd );

No cap, that's the exact signature — void, three pointers, done. 👑

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🍓 ARGUMENTS 🍓

• instance — the adapter soft state. Think of it as your adapter's whole personality/aesthetic file. 🫶
• scp — the SCSI command. The actual ask, the assignment, the homework. 💖
• cmd — the command to be prepared. This is the glow-up station, bestie — it goes in here and comes out ready. ✨

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🧚 DESCRIPTION 🧚

So what does it do? It prepares the io_request and chain elements (sg_frame) for IO. iykyk.

And the IO can be for PD (Fast Path) or LD. Those are the two branches, and yes, both are iconic in their own way. 🌈

Lowkey important: it's preparing the request and the scatter-gather chain — not firing it off. It's the prep era, not the send era. 💅

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👑 SEE ALSO 👑

The source lives in the kernel file ./drivers/scsi/megaraid/megaraid_sas_fusion.c — and honestly the whole friend group is here, so let's shout them out:

• megasas_adp_reset_wait_for_ready(9)
• megasas_check_same_4gb_region(9)
• megasas_enable_intr_fusion(9)
• megasas_disable_intr_fusion(9)
• megasas_get_cmd_fusion(9)
• megasas_return_cmd_fusion(9)
• megasas_write_64bit_req_desc(9)
• megasas_fire_cmd_fusion(9)
• megasas_fusion_update_can_queue(9)
• megasas_free_cmds_fusion(9)
• megasas_create_sg_sense_fusion(9)
• megasas_alloc_cmds_fusion(9)
• wait_and_poll(9)
• megasas_ioc_init_fusion(9)
• megasas_sync_pd_seq_num(9)
• megasas_allocate_raid_maps(9)
• megasas_configure_queue_sizes(9)
• megasas_free_ioc_init_cmd(9)
• megasas_init_adapter_fusion(9)
• megasas_fault_detect_work(9)
• map_cmd_status(9)
• megasas_is_prp_possible(9)
• megasas_make_prp_nvme(9)
• megasas_make_sgl_fusion(9)
• megasas_make_sgl(9)
• megasas_set_pd_lba(9)
• megasas_stream_detect(9)
• megasas_set_raidflag_cpu_affinity(9)
• megasas_build_ld_nonrw_fusion(9)
• megasas_build_syspd_fusion(9)
• megasas_build_io_fusion(9)
• megasas_build_and_issue_cmd_fusion(9)
• megasas_complete_r1_command(9)
• access_irq_context(9)
• release_irq_context(9)
• complete_cmd_fusion(9)
• megasas_enable_irq_poll(9)
• megasas_sync_irqs(9)
• megasas_irqpoll(9)
• megasas_complete_cmd_dpc_fusion(9)
• megasas_isr_fusion(9)
• build_mpt_mfi_pass_thru(9)
• build_mpt_cmd(9)
• megasas_issue_dcmd_fusion(9)
• megasas_release_fusion(9)
• megasas_read_fw_status_reg_fusion(9)
• megasas_alloc_host_crash_buffer(9)
• megasas_free_host_crash_buffer(9)
• megasas_adp_reset_fusion(9)
• megasas_check_reset_fusion(9)
• megasas_trigger_snap_dump(9)
• megasas_tm_response_code(9)
• megasas_issue_tm(9)

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Okay that's the whole page, bestie — go build some IOs and slay 💖

This one's from ./drivers/scsi/megaraid, dated October 2026, and you can find it filed under megasas_build_ldio_fusion(9). Periodt. 🎀💅