STRUCT PL08X_DMA_CHAN(9)

💖 struct pl08x_dma_chan(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for struct pl08x_dma_chan, and honestly? it's kind of a big deal. one quick heads-up before we dive in: this struct is what wraps a DMA ENGINE channel 🎀. that's the whole assignment, that's the vibe.

✨ SYNOPSIS ✨

struct pl08x_dma_chan {
    struct virt_dma_chan vc;
    struct pl08x_phy_chan *phychan;
    const char *name;
    struct pl08x_channel_data *cd;
    struct dma_slave_config cfg;
    struct pl08x_txd *at;
    struct pl08x_driver_data *host;
    enum pl08x_dma_chan_state state;
    bool slave;
    int signal;
    unsigned mux_use;
    unsigned long waiting_at;
 };

no cap, that's the whole struct right there 💅

🌸 Members 🌸

like, the moment you've all been waiting for. let's do a vibe check on every single field, one by one 🫶

• vc — the wrapped virtual channel ✨ (it's giving "inner circle")
• phychan — the physical channel utilized by this channel, if there is one → type struct pl08x_phy_chan *. note the "if there is one", bestie, sometimes there just isn't 😭
• name — name of channel 🏷️
• cd — channel platform data 💾
• cfg — slave configuration
• at — the active transaction on this channel 🔥 (main character energy fr)
• host — a pointer to the host (internal use) 🙈 — yes, internal, don't touch, it's not for you
• state — whether the channel is idle, paused, running, etc. — it's literally the mood ring of the channel 🌈
• slave — whether this channel is a device (slave) or for memcpy — a whole identity crisis in one bool 💀
• signal — the physical DMA request signal which this channel is using 📡
• mux_use — count of descriptors using this DMA request signal setting 🔢
• waiting_at — time in jiffies when this channel moved to waiting state ⏳ — it's giving "timestamped longing", iconic

👑 SEE ALSO 👑

go read these next, i'm obsessed with the whole friend group 🦋:

• Kernel file ./drivers/dma/amba-pl08x.c
• struct vendor_data(9)
• struct pl08x_bus_data(9)
• struct pl08x_phy_chan(9)
• struct pl08x_sg(9)
• struct pl08x_txd(9)
• enum pl08x_dma_chan_state(9)
• struct pl08x_driver_data(9)

and that's a wrap, bestie 🌸 mwah 💋 — this little number lives in ./drivers/dma, dated October 2026, and it's brought to you by struct pl08x_dma_chan(9). slay, go read your kernel source, i believe in you 💜✨