STRUCT CDNS_PCIE(9)

✨ struct cdns_pcie — the whole vibe ✨

okay so bestie, let me introduce you to struct cdns_pcie 💅 this is literally the private data situation for the Cadence PCIe controller drivers. it's giving "backstage pass to the PCIe show," no cap. 🎀

🌸 SYNOPSIS 🌸

struct cdns_pcie {
    void __iomem                         *reg_base;
    struct resource                      *mem_res;
    struct resource                      *msg_res;
    struct device                        *dev;
    bool is_rc;
    bool is_hpa;
    int phy_count;
    struct phy                           **phy;
    struct device_link                   **link;
    const struct cdns_pcie_ops          *ops;
    const struct cdns_plat_pcie_of_data *cdns_pcie_reg_offsets;
    int max_link_speed;
    struct dentry                        *debug_dir;
 };

👑 Members (the whole cast, and they all ate) 👑

• reg_base — the IO mapped register base. like, the home address of all the register energy 🏠✨
• mem_res — start/end offsets in the physical system memory, specifically for mapping PCI accesses. it's the map, bestie 🗺️
• msg_res — the region for send message to map PCI accesses. dedicated message lane, periodt 💌
• dev — the PCIe controller itself. main character energy fr fr 🌟
• is_rc — tells you whether the PCIe controller mode is Root Complex or Endpoint. literally the "which one am I" flag 🙈
• is_hpa — indicates if the architecture is HPA. yes ma'am, noted 🫶
• phy_count — number of supported PHY devices. the headcount, iykyk 🔢
• phy — list of pointers to specific PHY control blocks. a whole friend group of pointers 💖
• link — list of pointers to corresponding device link representations. the connections, the lore 🔗
• ops — platform-specific ops to control various inputs from the Cadence PCIe wrapper. this is the customizable slay layer 🎛️
• cdns_pcie_reg_offsets — register bank offsets for different SoC. different SoCs, different offsets, same iconic energy 🌈
• max_link_speed — maximum supported link speed. the speed limit, and it's highkey important 🏎️💨
• debug_dir — the debugfs node. where the debugging besties hang out 🐛🔍

🦋 SEE ALSO 🦋

kernel file ./drivers/pci/controller/cadence/pcie-cadence.h struct cdns_plat_pcie_of_data(9), struct cdns_pcie_rc(9), struct cdns_pcie_epf(9), struct cdns_pcie_ep(9) — go read these too, bestie, they're all part of the family 🫶✨

and that's the whole page, no notes 💅 this little icon lives in ./drivers/pci/controller/cadence, dated October 2026, and it's brought to you by the struct cdns_pcie(9) manual. slay and goodbye 🎀🌟