STRUCT CDNS_PCIE_RC(9)

💖 NAME 💖

okay so welcome to the struct cdns_pcie_rc(9) page, bestie — this is the private data for this PCIe Root Complex driver, straight out of the Kernel API Manual ✨ no cap, that's literally the whole name section 🫶

---

🎀 SYNOPSIS 🎀

here's the struct in all its iconic glory, copy it exactly bestie, don't you dare touch a character 💅

struct cdns_pcie_rc {
    struct cdns_pcie        pcie;
    struct resource         *cfg_res;
    void __iomem            *cfg_base;
    u32 vendor_id;
    u32 device_id;
    bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB];
    unsigned int            quirk_retrain_flag:1;
    unsigned int            quirk_detect_quiet_flag:1;
    unsigned int            ecam_supported:1;
    unsigned int            no_inbound_map:1;
    unsigned int            quirk_broken_aspm_l0s:1;
    unsigned int            quirk_broken_aspm_l1:1;
 };

like, look at those bitfields — one bit each, highkey thrifty 👑

---

🌸 Members 🌸

okay so here's the member-by-member tour and honestly every single one matters, so no skipping 🙈

• pcie — the Cadence PCIe controller itself, the main character of this struct ✨
• cfg_res — the start/end offsets in the physical system memory, used to map PCI configuration space accesses 📍
• cfg_base — the IO mapped window that lets you access the PCI configuration space of a single function at a time 🪟
• vendor_id — the PCI vendor ID, yup that's it 🏷️
• device_id — the PCI device ID, its bestie 🏷️
• avail_ib_bar — status of RP_BAR0, RP_BAR1 and RP_NO_BAR, telling you if it's free or available 🎀
• quirk_retrain_flag — retrain the link as a quirk for PCIe Gen2, quirky behavior fr fr 🔁
• quirk_detect_quiet_flag — LTSSM Detect Quiet min delay, set as a quirk 🤫
• ecam_supported — whether the ECAM is supported, yes or no bestie ✅
• no_inbound_map — whether inbound mapping is supported 🚫
• quirk_broken_aspm_l0s — disable ASPM L0s support as a quirk 💀
• quirk_broken_aspm_l1 — disable ASPM L1 support as a quirk 💀

ngl the quirk flags are giving "we found a hardware bug and worked around it" energy, and honestly? iconic of them 💅

---

🦋 SEE ALSO 🦋

go touch some related lore, bestie 🧚

• Kernel file ./drivers/pci/controller/cadence/pcie-cadence.h
• struct cdns_plat_pcie_of_data(9)
• struct cdns_pcie(9)
• struct cdns_pcie_epf(9)
• struct cdns_pcie_ep(9)

iykyk 🌈

---

and that's the whole page, periodt 💜 big slay to the ./drivers/pci/controller/cadence crew, this one's dated October 2026 and it ate fr fr — see u in the next manpage, mwah 🍓