sdma_select_engine_vl(9)

✨ sdma_select_engine_vl(9) ✨

okay so bestie, this is the Kernel API Manual entry for sdma_select_engine_vl(9) — the little function that picks an sdma engine and is lowkey iconic for it 💅

💖 NAME 💖

sdma_select_engine_vl — select sdma engine. periodt.

🦋 SYNOPSIS 🦋

struct sdma_engine * sdma_select_engine_vl (struct hfi1_devdata *dd ,
       u32 selector , u8 vl );

🌸 ARGUMENTS 🌸

• dd — devdata. that's the device data bestie is working with 🫶
• selector — a spreading factor. mysterious, powerful, doing her thing ✨
• vl — this vl. literally this vl 💅

🔥 DESCRIPTION 🔥

okay so sdma_select_engine_vl() returns an engine based on the selector and a vl. that's the whole main character move.

and the mapping fields are protected by RCU — important detail, no cap 😌

🎀 SEE ALSO 🎀

Kernel file ./drivers/infiniband/hw/hfi1/sdma.c plus the whole friend group:

• sdma_state_name(9)
• sdma_get_descq_cnt(9)
• sdma_engine_get_vl(9)
• sdma_select_engine_sc(9)
• sdma_seqfile_dump_cpu_list(9)
• sdma_map_init(9)
• sdma_clean(9)
• sdma_init(9)
• sdma_all_running(9)
• sdma_start(9)
• sdma_exit(9)
• __sdma_txclean(9)
• sdma_engine_error(9)
• sdma_seqfile_dump_sde(9)
• sdma_send_txreq(9)
• sdma_send_txlist(9)
• sdma_ahg_alloc(9)
• sdma_ahg_free(9)
• _sdma_engine_progress_schedule(9)

xoxo from the ./drivers/infiniband/hw/hfi1 corner of the Kernel API Manual, dated October 2026 — slay 💖