megasas_make_sgl(9)

💖 megasas_make_sgl(9) 💖

okay so this page is megasas_make_sgl(9) from the Kernel API Manual, and we're building Scatter Gather Lists(SGLs) like it's main character era ✨

🌸 NAME 🌸

megasas_make_sgl — Build Scatter Gather List(SGLs) 💅

✨ SYNOPSIS ✨

bestie, here's the signature exactly as it is:

int megasas_make_sgl (struct megasas_instance *instance , struct scsi_cmnd *scp , struct megasas_cmd_fusion *cmd );

🎀 ARGUMENTS 🎀

• instance — soft instance of controller, like the controller's own lil ID 🫶
• scp — SCSI command pointer, the SCSI command bestie in question 📌
• cmd — Fusion command pointer, the fusion command bestie in question 🔥

🦋 DESCRIPTION 🦋

okay so megasas_make_sgl builds sgls based on device type — no cap, it's giving device-type-aware construction 💫

for nvme drives, there's a different way of building sgls in nvme native format — PRPs(Physical Region Page) 🧚

and the return vibe? it returns the number of sg lists actually used, zero (0) if the sg lists is NULL, or -ENOMEM if the mapping failed 😭

🌈 SEE ALSO 🌈

Kernel file: ./drivers/scsi/megaraid/megaraid_sas_fusion.c 📁

also lowkey these besties are all part of the same fusion saga 👑

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_set_pd_lba(9),
megasas_stream_detect(9),
megasas_set_raidflag_cpu_affinity(9),
megasas_build_ldio_fusion(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)

---

okay bestie that's the whole page 🫶 this one comes from ./drivers/scsi/megaraid, dated October 2026, and the manual name is megasas_make_sgl(9) — periodt 💖✨