STRUCT XDMA_CHAN(9)

🎀 struct xdma_chan(9) 🎀

okay bestie, welcome to the Kernel API Manual 💖 — this is the page for the driver-specific DMA channel structure, and it's giving "kernel struct but make it cute." Let's get into it.

✨ NAME ✨

struct xdma_chan — driver specific DMA channel structure. That's the whole name, no cap 💅

🦋 SYNOPSIS 🦋

here's the struct in all its glory, copied exactly so nobody comes for me:

       struct xdma_chan {
           struct virt_dma_chan            vchan;
           void *xdev_hdl;
           u32 base;
           struct dma_pool                 *desc_pool;
           bool busy;
           enum dma_transfer_direction     dir;
           struct dma_slave_config         cfg;
           u32 irq;
           struct completion               last_interrupt;
           bool stop_requested;
        };

💖 Members 💖

okay so every field on this struct has a job, and we're respecting all of them:

• vchan — virtual channel ✨
• xdev_hdl — pointer to DMA device structure 🫶
• base — offset of channel registers
• desc_pool — descriptor pool 🎀
• busy — busy flag of the channel
• dir — transferring direction of the channel 🦋
• cfg — transferring config of the channel
• irq — IRQ assigned to the channel ⚡
• last_interrupt — task for comppleting last interrupt 😭
• stop_requested — stop request flag

lowkey, if you're cross-checking field names, this is the moment — the struct is the main character here 👑

🌈 SEE ALSO 🌈

bestie, the kernel file is ./drivers/dma/xilinx/xdma.c, and these are the related pages you're gonna want:

• struct xdma_desc_block(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_alloc_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)

xoxo 💋 — this page came from ./drivers/dma/xilinx, dated October 2026, and it's the struct xdma_chan(9) page. bye bestie 🫶