atc_prep_dma_memset(9)

💅 NAME 💅

okay bestie, welcome to the Kernel API Manual ✨ — this page is all about atc_prep_dma_memset, and what it does is, and I quote, prepare a memcpy operation. yes, the memset page says memcpy. that's what the page says, i'm not gonna lie to you, i'm just the messenger 🫶

✨ SYNOPSIS ✨

struct dma_async_tx_descriptor * atc_prep_dma_memset (struct dma_chan
*chan , dma_addr_t dest , int value , size_t len , unsigned long flags
);

like, literally that's the whole vibe. five args, one descriptor pointer coming back at you 💫

🎀 ARGUMENTS 🎀

• chan — the channel you're preparing this operation on, i.e. where the work actually happens 🎯
• dest — the operation's virtual destination address, aka where the bytes are going, main character address energy 👑
• value — the value you're setting the memory buffer to, fr fr 🌸
• len — the operation length, so how much we're working with, no cap 📏
• flags — the tx descriptor status flags, the little detail gremlins that tell you what state this descriptor is in 🏷️

ngl bestie, read those argument names one more time before you ship anything — this is kernel code and there's no undo button 💀

🦋 SEE ALSO 🦋

the whole friend group lives in the kernel file ./drivers/dma/at_hdmac.c and honestly it's giving icon behavior 🌈 here's everyone:

• struct atdma_sg(9)
• struct at_desc(9)
• enum atc_status(9)
• struct at_dma_chan(9)
• struct at_dma(9)
• atc_chan_is_enabled(9)
• atc_chan_is_paused(9)
• atc_chan_is_cyclic(9)
• set_lli_eol(9)
• struct at_dma_platform_data(9)
• struct at_dma_slave(9)
• atc_dostart(9)
• atc_calc_bytes_left(9)
• atc_get_llis_residue(9)
• atc_get_residue(9)
• atc_handle_error(9)
• atc_prep_dma_interleaved(9)
• atc_prep_dma_memcpy(9)
• atc_prep_slave_sg(9)
• atc_prep_dma_cyclic(9)
• atc_tx_status(9)
• atc_alloc_chan_resources(9)
• atc_free_chan_resources(9)
• at_dma_off(9)

and that's the page, bestie 🥹 tysm for reading, go touch some DMA descriptors (gently). this lil baddie came from ./drivers/dma, dated October 2026, and it answers to the name atc_prep_dma_memset(9) 💖✨🎀🧚‍♀️