STRUCT RZG3S_PCIE_MSI(9)

🌸 struct rzg3s_pcie_msi(9) — RZ/G3S PCIe MSI data structure 💅

Ok so bestie, welcome to the Kernel API Manual ✨ and buckle up, because this page is all about one little struct: struct rzg3s_pcie_msi. It's the RZ/G3S PCIe MSI data structure, and it's honestly carrying a lot of the MSI situation on its back. Let's get into it 🫶

✨ SYNOPSIS ✨

Here's the shape of it, no cap — copy it exactly, we do not freestyle struct definitions:

struct rzg3s_pcie_msi {
    struct irq_domain *domain;
    unsigned long map[BITS_TO_LONGS( RZG3S_PCI_MSI_INT_NR)];
    dma_addr_t dma_addr;
    dma_addr_t window_base;
    unsigned long pages;
    struct mutex map_lock;
    int irq;
 };

🎀 Members 🎀

Every field is kind of a main character here, so let's give them all their moment 🌟:

• domain — the IRQ domain, literally the whole IRQ situation lives here
• map — a bitmap holding all the allocated MSIs 💖
• dma_addr — the address of the allocated MSI window
• window_base — the base address of that MSI window, iykyk
• pages — how many pages got allocated for MSI window mapping
• map_lock — the lock guarding the bitmap with the allocated MSIs 🔒 (mutex behaviour, respectfully)
• irq — the MSI interrupt, the moment we've all been waiting for ⚡

🌈 SEE ALSO 🌈

If you're obsessed and want the whole friend group, they're all right here, fr fr:

Kernel file ./drivers/pci/controller/pcie-rzg3s-host.c, plus enum rzg3s_sysc_link_mode(9), struct rzg3s_sysc_function(9), enum rzg3s_sysc_func_id(9), struct rzg3s_sysc_info(9), struct rzg3s_sysc(9), enum rzg3s_pcie_controller_id(9), struct rzg3s_pcie_soc_data(9), struct rzg3s_pcie_port(9), and struct rzg3s_pcie_host(9).

Go read them all in order bestie, that's the vibe check ✅

And that's the whole page, mwah 💋 — brought to you from ./drivers/pci/controller, dated October 2026. Slay, go allocate some MSIs responsibly 👑🦋