snd_ump_receive(9)

💅 snd_ump_receive(9) — Kernel API Manual, bestie edition 🎀

okay so welcome to the snd_ump_receive(9) page, straight out of the Kernel API Manual ✨ pull up a chair, grab a boba, we're learning how UMP packets get from the device to user-space 🧚

🌸 NAME 🌸

snd_ump_receive — transfer UMP packets from the device 💖

✨ SYNOPSIS ✨

int snd_ump_receive (struct snd_ump_endpoint *ump , const u32 *buffer ,
       int count );

🦋 ARGUMENTS 🦋

• ump — the UMP endpoint, your main character struct 👑
• buffer — the buffer pointer to transfer, i.e. where the goods live 📦
• count — byte size to transfer, yes it's bytes, don't come for me 💀

💜 DESCRIPTION 💜

So the driver calls this to submit the received UMP packets from the device up to user-space 🫶 it's essentially a wrapper of rawmidi_receive, no cap, that's literally the whole vibe.

The data to receive is in CPU-native endianness — like, native native, so don't go byte-swapping on me 🙈

🌈 SEE ALSO 🌈

• Kernel file ./sound/core/ump.c
• snd_ump_endpoint_new(9)
• snd_ump_receive_ump_val(9)
• snd_ump_transmit(9)
• snd_ump_block_new(9)
• snd_ump_switch_protocol(9)
• snd_ump_parse_endpoint(9)

that's the whole page bestie, go read the friends above, they ate 🔥

source tingz: ./sound/core, dated October 2026 — mwah, mwah, sending you all the kernel love 💅⭐🍓