STRUCT IPROC_PCIE_IB_MAP(9)

✨ struct iproc_pcie_ib_map(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's all about struct iproc_pcie_ib_map — and yes, that's the whole NAME section, it's literally just: the inbound mapping controller-specific parameters for iProc PCIe 🎀 no cap, that's the entire vibe of this struct.

It's giving "little config blob that tells the driver how your hardware's inbound windows actually work" — and honestly? iconic. 🦋

🌸 SYNOPSIS 🌸

struct iproc_pcie_ib_map {
    enum iproc_pcie_ib_map_type type;
    unsigned int size_unit;
    resource_size_t region_sizes[MAX_NUM_IB_REGION_SIZES];
    unsigned int nr_sizes;
    unsigned int nr_windows;
    u16 imap_addr_offset;
    u16 imap_window_offset;
 };

like, that's the whole struct, copy-paste exact, do not touch a single character bestie 😭

👑 Members 👑

• type — the inbound mapping region type 💅 (spoiler: it's an enum iproc_pcie_ib_map_type)
• size_unit — the size unit used for inbound mapping regions. could be SZ_1K, SZ_1M, or SZ_1G — pick your fighter ⭐
• region_sizes — a whole lil list of the supported inbound mapping region sizes, expressed in KB, MB, or GB — which one depends on the size unit, iykyk 🌈
• nr_sizes — how many supported inbound mapping region sizes there are, i.e. the count for region_sizes 🔢
• nr_windows — how many inbound mapping windows the region supports 🪟
• imap_addr_offset — the register offset between the upper and lower 32-bit IMAP address registers 🧚 (yes, u16, yes, it's fine)
• imap_window_offset — the register offset between each IMAP window 🌸

ngl the two offset fields are the ones people forget — they're u16, they're about IMAP registers, and one is "between upper and lower 32-bit address registers" while the other is "between each window." different things, bestie, don't mix them up 💀

🦋 SEE ALSO 🦋

• Kernel file ./drivers/pci/controller/pcie-iproc.c
• struct iproc_pcie_ob_map(9) — the outbound sibling, go say hi 👋
• enum iproc_pcie_ib_map_type(9) — where type gets its whole personality from ✨

and that's the page, periodt 💜 shoutout to ./drivers/pci/controller for holding it down — this one's dated October 2026, so mark your calendar bestie 🎀 🫶