xilinx_dpdm..._prep_cyclic(9)

📦 version 7.3.1, in nixpkgs unstable

💅 xilinx_dpdma_chan_prep_cyclic(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for xilinx_dpdma_chan_prep_cyclic, and honestly it's giving "small function, big job" energy. Let's get into it 🫶

✨ NAME ✨

xilinx_dpdma_chan_prep_cyclic — Prepare a cyclic dma descriptor 🌈

🎀 SYNOPSIS 🎀

struct dma_async_tx_descriptor * xilinx_dpdma_chan_prep_cyclic (struct
xilinx_dpdma_chan *chan , dma_addr_t buf_addr , size_t buf_len , size_t
period_len , unsigned long flags );

like literally, that signature is the whole vibe check. struct pointer out, five args in, no notes 💅

🦋 ARGUMENTS 🦋

  • chan — the DPDMA channel, your main character 🎀
  • buf_addr — buffer address, aka where the actual data lives
  • buf_len — buffer length, how much of it we're working with
  • period_len — number of periods 🔁 (yes bestie, cyclic means it loops — that's the whole point)
  • flags — the tx flags argument that gets passed in to the prepare function

🌸 DESCRIPTION 🌸

so basically this one prepares a tx descriptor, and ngl it's doing a lot under the hood — it includes the internal software/hardware descriptors for the given cyclic transaction 🧚

like, it's not just one descriptor, it's the whole little squad of them for your cyclic transfer. team effort, fr fr 🔥

⭐ RETURN ⭐

on success you get a dma async tx descriptor back 🎉 and if it doesn't work out? NULL. that's it, that's the mood 😭

👑 SEE ALSO 👑

kernel file ./drivers/dma/xilinx/xilinx_dpdma.c plus this whole bestie list:

like, go read them, iykyk 📚💖

ok that's the whole page bestie, no gatekeeping here 🫶 go build something iconic 💜

signed off from ./drivers/dma/xilinx, dated October 2026, page xilinx_dpdm..._prep_cyclic(9) — periodt 💅✨

📦 where this page comes from