xdma_alloc_desc(9)

🌸 NAME 🌸

okay so bestie, welcome to the xdma_alloc_desc(9) page in the Kernel API Manual 💖. This one is literally called xdma_alloc_desc, and its whole thing is: Allocate descriptor ✨. That’s the name, that’s the job, no cap.

✨ SYNOPSIS ✨

Here’s the signature, and yes, copy it exactly — character for character, bestie 🫶:

struct xdma_desc * xdma_alloc_desc (struct xdma_chan *chan , u32
desc_num , bool cyclic );

💅 ARGUMENTS 💅

Three arguments, three little besties — let’s do a vibe check:

• chan — DMA channel pointer. It’s the channel pointer you’re handing over, periodt.
• desc_num — Number of hardware descriptors. Literally how many hardware descriptors, iykyk.
• cyclic — Whether this is a cyclic transfer. Just tells you if this is a cyclic transfer, that’s it.

👑 SEE ALSO 👑

If you’re going down the rabbit hole, here’s the whole crew from the Kernel file ./drivers/dma/xilinx/xdma.c 🦋:

• struct xdma_desc_block(9)
• struct xdma_chan(9)
• struct xdma_desc(9)
• struct xdma_device(9)
• xdma_link_sg_desc_blocks(9)
• xdma_link_cyclic_desc_blocks(9)
• xdma_channel_init(9)
• xdma_free_desc(9)
• xdma_xfer_start(9)
• xdma_xfer_stop(9)
• xdma_alloc_channels(9)
• xdma_issue_pending(9)
• xdma_terminate_all(9)
• xdma_synchronize(9)
• xdma_fill_descs(9)
• xdma_prep_device_sg(9)
• xdma_prep_dma_cyclic(9)
• xdma_prep_interleaved_dma(9)
• xdma_device_config(9)
• xdma_free_chan_resources(9)
• xdma_alloc_chan_resources(9)
• xdma_channel_isr(9)
• xdma_irq_fini(9)
• xdma_set_vector_reg(9)
• xdma_irq_init(9)
• xdma_disable_user_irq(9)
• xdma_enable_user_irq(9)
• xdma_get_user_irq(9)
• xdma_remove(9)
• xdma_probe(9)

mwah 💋 signing off from source/version ./drivers/dma/xilinx, dated October 2026 — stay hydrated and may your descriptor allocation be iconic 🌈💖