STRUCT PPC440SPE_ADMA_DEVICE(9)

💅 NAME

ok so bestie, this page is about struct ppc440spe_adma_device — it's the internal representation of an ADMA device ✨ like the lil' behind-the-scenes struct that holds everything together. no cap, it's the main character of the ADMA world 🎀

this whole thing lives in the Kernel API Manual, iykyk 🦋

🌸 SYNOPSIS

struct ppc440spe_adma_device {
           struct device *dev;
           struct dma_regs __iomem *dma_reg;
           struct xor_regs __iomem *xor_reg;
           struct i2o_regs __iomem *i2o_reg;
           int id;
           void *dma_desc_pool_virt;
           dma_addr_t dma_desc_pool;
           size_t pool_size;
           int irq;
           int err_irq;
           struct dma_device common;
        };

that's the whole vibe right there 🔥 copy it exactly, don't be cute with it 💅

🫶 Members

okay so here's the member-by-member breakdown, the way that each one is literally doing its own lil' job 🧚

• dev — the device. that's it. that's the member 💖 it's just the device, periodt.
• dma_reg — base for DMAx register access. this is where you go to poke at the DMAx registers 👑
• xor_reg — base for XOR register access. same energy, different register block ✨
• i2o_reg — base for I2O register access. yes bestie, a third base 🎀
• id — HW ADMA Device selector. this is how the hardware knows which ADMA device we're talking about 🌈
• dma_desc_pool_virt — base of DMA descriptor region, but the CPU address flavor 🧠
• dma_desc_pool — base of DMA descriptor region, and this one's the DMA address flavor 🦋 (yes there are two, they are not the same, do not mix them up 💀)
• pool_size — size of the pool. the pool's size. that's the whole thing 🌸
• irq — DMAx or XOR irq number. either one, depending on the moment 🙈
• err_irq — DMAx error irq number. this one's specifically for the errors 😭
• common — embedded struct dma_device. it's nested. it's cozy. it's embedded 💜

⭐ SEE ALSO

• Kernel file ./drivers/dma/ppc4xx/adma.h
• struct ppc440spe_adma_chan(9)
• struct ppc440spe_adma_desc_slot(9)

like, go read those too, bestie, they're all in the same friend group 🫶

okay and before you go — the source is ./drivers/dma/ppc4xx, dated October 2026, and the whole thing answers to the name struct ppc44..._adma_device(9) (yes, the header/footer literally abbreviates it like that, no we did not do that, it's giving truncated 🎀). slay, go forth and be iconic with your ADMA devices 💅✨👑