zynqmp_dma_prep_memcpy(9)

📦 version 7.3.1, in nixpkgs unstable

💫 zynqmp_dma_prep_memcpy(9) 💫

okay bestie, welcome to the Kernel API Manual ✨ — today's main character is zynqmp_dma_prep_memcpy(9), and honestly? she's giving "quietly essential". let's get into it 🫶

🌸 NAME 🌸

zynqmp_dma_prep_memcpy — prepare descriptors for memcpy transaction 💅

like, she's the one doing the prep work before the actual copy happens. the backstage icon. the pre-show glam. 🎀

🦋 SYNOPSIS 🦋

struct dma_async_tx_descriptor * zynqmp_dma_prep_memcpy (struct dma_chan
*dchan , dma_addr_t dma_dst , dma_addr_t dma_src , size_t len , ulong
flags );

no cap, that's the whole signature. every param, every type, exactly as it is. don't @ me, I didn't write it 😭

✨ ARGUMENTS ✨

  • dchan — the DMA channel 💜 like, the lane she's driving in
  • dma_dst — destination buffer address 🎯 where the stuff is going
  • dma_src — source buffer address 📦 where the stuff is coming from
  • len — transfer length 📏 how much we're moving, bestie
  • flags — transfer ack flags 🚩 the acknowledgement vibes

👑 RETURN 👑

async transaction descriptor on success 💖 and NULL on failure 💀 — so like, always check, okay? don't be out here dereferencing a NULL and acting surprised 🙈

🌈 SEE ALSO 🌈

the whole friend group, fr fr. she does not exist in a vacuum 🧚

Kernel file ./drivers/dma/xilinx/zynqmp_dma.c, plus:

reminder bestie: this page lives under ./drivers/dma/xilinx, so if you go looking for the source, that's the neighborhood 🏡

and that's the whole vibe check 💅 signing off from the Kernel API Manual, dated October 2026, brought to you by ./drivers/dma/xilinx — stay hydrated, read your structs, and may all your descriptors be async and your returns non-NULL 💖✨🎀🦋🌸

📦 where this page comes from