snd_pcm_sgbuf_get_addr(9)

💅 snd_pcm_sgbuf_get_addr — a Kernel API Manual moment

Okay so bestie, welcome to snd_pcm_sgbuf_get_addr(9) — yes that's the manual page name, it's a whole thing. Sit down, hydrate, let's get into it ✨

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✨ NAME ✨

snd_pcm_sgbuf_get_addr — literally gets you the DMA address at the corresponding offset. That's the whole vibe. 🎯

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🎀 SYNOPSIS 🎀

dma_addr_t snd_pcm_sgbuf_get_addr (struct snd_pcm_substream *substream ,
unsigned int ofs );

Look at her. Iconic signature. No notes. 👑

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🦋 ARGUMENTS 🦋

Two things, that's it, we love a low-maintenance function:

• substream — your PCM substream. The main character of this story 🫶
• ofs — a byte offset. Just a byte offset. Say it with me: byte offset. 💅

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🌸 RETURN 🌸

A DMA address. That's it, that's the return value. Handed to you like a little gift 🎁

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🌈 SEE ALSO 🌈

Bestie. Sit down. There are so many friends in this friend group and I'm not leaving a single one out, because every one of them is valid and loved 💖

• The file itself: Kernel file ./include/sound/pcm.h
• snd_pcm_stream_linked(9)
• snd_pcm_stream_lock_irqsave(9)
• snd_pcm_stream_lock_irqsave_nested(9)
• snd_pcm_group_for_each_entry(9)
• snd_pcm_running(9)
• __snd_pcm_set_state(9)
• bytes_to_samples(9)
• bytes_to_frames(9)
• samples_to_bytes(9)
• frames_to_bytes(9)
• frame_aligned(9)
• snd_pcm_lib_buffer_bytes(9)
• snd_pcm_lib_period_bytes(9)
• snd_pcm_playback_avail(9)
• snd_pcm_capture_avail(9)
• snd_pcm_playback_hw_avail(9)
• snd_pcm_capture_hw_avail(9)
• snd_pcm_playback_ready(9)
• snd_pcm_capture_ready(9)
• snd_pcm_playback_data(9)
• snd_pcm_playback_empty(9)
• snd_pcm_capture_empty(9)
• snd_pcm_trigger_done(9)
• params_channels(9)
• params_rate(9)
• params_period_size(9)
• params_periods(9)
• params_buffer_size(9)
• params_buffer_bytes(9)
• snd_pcm_hw_constraint_single(9)
• snd_pcm_format_cpu_endian(9)
• snd_pcm_set_sync(9)
• snd_pcm_set_runtime_buffer(9)
• snd_pcm_gettime(9)
• snd_pcm_set_fixed_buffer(9)
• snd_pcm_set_fixed_buffer_all(9)
• snd_pcm_sgbuf_get_chunk_size(9)
• snd_pcm_limit_isa_dma_size(9)
• snd_pcm_direction_name(9)
• snd_pcm_stream_str(9)
• snd_pcm_chmap_substream(9)
• pcm_format_to_bits(9)
• pcm_for_each_format(9)

Forty-plus entries and I typed every single one because that's what a real bestie does 💀💖

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Lowkey obsessed with how short this manpage is. Highkey obsessed that the SEE ALSO section is doing all the heavy lifting. Balance. 🌸

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Alright babe, that's the page! Sourced from ./include/sound, dated October 2026 — take care of her, she's part of the kernel family now 🧚‍♀️💜✨