STRUCT ZYNQMP_DMA_CHAN(9)

💅 struct zynqmp_dma_chan(9) — the Kernel API Manual glow-up 🎀

okay bestie, buckle up — this is the page for struct zynqmp_dma_chan, aka the driver-specific DMA channel structure ✨ (yeah that whole thing is the NAME section, we're doing this properly 💖)

✨ SYNOPSIS ✨

struct zynqmp_dma_chan {
    struct zynqmp_dma_device *zdev;
    void __iomem *regs;
    spinlock_t lock;
    struct list_head pending_list;
    struct list_head free_list;
    struct list_head active_list;
    struct zynqmp_dma_desc_sw *sw_desc_pool;
    struct list_head done_list;
    struct dma_chan common;
    void *desc_pool_v;
    dma_addr_t desc_pool_p;
    u32 desc_free_cnt;
    struct device *dev;
    int irq;
    bool is_dmacoherent;
    struct tasklet_struct tasklet;
    bool idle;
    size_t desc_size;
    bool err;
    u32 bus_width;
    u32 src_burst_len;
    u32 dst_burst_len;
    u32 irq_offset;
 };

like, that's the whole struct, no crumbs left behind 🫶

🌸 Members 🌸

not me about to go through every single field, because every single field matters 😤💅

• zdev — the driver-specific device structure 💖
• regs — control registers offset ✨
• lock — the descriptor operation lock (lock it down, bestie 🔒)
• pending_list — descriptors waiting 🕰️
• free_list — descriptors free 🦋
• active_list — descriptors active 🔥
• sw_desc_pool — the SW descriptor pool 🌈
• done_list — complete descriptors ✅
• common — the DMA common channel 👑
• desc_pool_v — statically allocated descriptor base 🌸
• desc_pool_p — physical allocated descriptor base 🧚
• desc_free_cnt — descriptor available count 🔢
• dev — the dma device 💜
• irq — channel IRQ ⚡
• is_dmacoherent — tells whether dma operations are coherent or not 👀 (the vibe check for coherency, if you will)
• tasklet — cleanup work after irq 🧹
• idle — channel status; 🎀 (yes, with the semicolon, we don't edit the source material okay 😭)
• desc_size — size of the low level descriptor 📏
• err — channel has errors 💀
• bus_width — bus width 🛣️
• src_burst_len — source burst length 🍓
• dst_burst_len — dest burst length 🍓
• irq_offset — irq register offset 📍

💜 SEE ALSO 💜

the whole friend group, fr fr — from the kernel file ./drivers/dma/xilinx/zynqmp_dma.c, struct zynqmp_dma_desc_ll(9), struct zynqmp_dma_desc_sw(9), struct zynqmp_dma_device(9), zynqmp_dma_update_desc_to_ctrlr(9), zynqmp_dma_desc_config_eod(9), zynqmp_dma_config_sg_ll_desc(9), zynqmp_dma_init(9), zynqmp_dma_tx_submit(9), zynqmp_dma_get_descriptor(9), zynqmp_dma_free_descriptor(9), zynqmp_dma_free_desc_list(9), zynqmp_dma_alloc_chan_resources(9), zynqmp_dma_start(9), zynqmp_dma_handle_ovfl_int(9), zynqmp_dma_device_config(9), zynqmp_dma_start_transfer(9), zynqmp_dma_chan_desc_cleanup(9), zynqmp_dma_complete_descriptor(9), zynqmp_dma_issue_pending(9), zynqmp_dma_free_descriptors(9), zynqmp_dma_free_chan_resources(9), zynqmp_dma_reset(9), zynqmp_dma_irq_handler(9), zynqmp_dma_do_tasklet(9), zynqmp_dma_device_terminate_all(9), zynqmp_dma_synchronize(9), zynqmp_dma_prep_memcpy(9), zynqmp_dma_chan_remove(9), zynqmp_dma_chan_probe(9), of_zynqmp_dma_xlate(9), zynqmp_dma_suspend(9), zynqmp_dma_resume(9), zynqmp_dma_runtime_suspend(9), zynqmp_dma_runtime_resume(9), zynqmp_dma_probe(9), zynqmp_dma_remove(9)

like hello?? that's a whole squad 😭🫶

okay that's the page!! mwah 💋 this iconic little number lives in ./drivers/dma/xilinx, it's dated October 2026, and it came to you straight from the Kernel API Manual — periodt, no cap, go read some kernel source bestie 🌟👑💖