STRUCT MTK_CQDMA_PCHAN(9)

💅 NAME 💅

struct mtk_cqdma_pchan — bestie, this is literally the struct that holds all the info describing a physical channel (PC) 🫶

(oh and hey, welcome to the Kernel API Manual, we're getting into it ✨)

🎀 SYNOPSIS 🎀

struct mtk_cqdma_pchan {
    struct list_head queue;
    void __iomem *base;
    u32 irq;
    refcount_t refcnt;
    struct tasklet_struct tasklet;
    spinlock_t lock;
 };

🌸 Members 🌸

okay so here's the cast of characters, no cap, every single one matters 👑

• queue — the queue holding the PDs that got issued to this PC. it's giving "to-do list but make it DMA" 📋
• base — the mapped register I/O base of this PC. this is where the PC's registers live, periodt 💅
• irq — the IRQ that this PC is using. the interrupt line, the whole vibe check ⚡
• refcnt — tracks how many VCs are using this PC. like a little counter keeping receipts of who's in the building 🔢
• tasklet — the tasklet for this PC. yeah, that's the whole description, it's a tasklet, it's iconic 🧚
• lock — the lock that protects against multiple VCs accessing the PC at the same time. lowkey essential, do NOT skip this one 🔒

🌈 SEE ALSO 🌈

• Kernel file ./drivers/dma/mediatek/mtk-cqdma.c
• struct mtk_cqdma_vdesc(9)
• struct mtk_cqdma_vchan(9)
• struct mtk_cqdma_device(9)

and that's the whole page, bestie!! 🦋 this one lives in ./drivers/dma/mediatek, it's rockin' the October 2026 timestamp, and it's filed under struct mtk_cqdma_pchan(9) in your fave Kernel API Manual 💖 mwah, go read the actual source now 😭💀