STRUCT PCI_IDE_PARTNER(9)

✨ NAME ✨

struct pci_ide_partner — the per port pair Selective IDE Stream settings, bestie 💖

🦋 SYNOPSIS 🦋

struct pci_ide_partner {
    u16 rid_start;
    u16 rid_end;
    u8 stream_index;
    struct pci_bus_region mem_assoc;
    struct pci_bus_region pref_assoc;
    unsigned int default_stream:1;
    unsigned int setup:1;
    unsigned int enable:1;
 };

💅 Members 💅

Okay so every field, one by one, no skips, we're doing this properly 🫶

• rid_start — where the Partner Port Requester ID range starts. That's it, that's the field ✨
• rid_end — where the Partner Port Requester ID range ends, and yes it's inclusive so don't come for me about off-by-one 😭
• stream_index — picks which Selective IDE Stream Register Block you're talking about 🎀
• mem_assoc — the PCI bus memory address association used for targeting the peer partner 🌸
• pref_assoc — same energy but for prefetchable PCI bus memory address association, for targeting that peer partner 🦋
• default_stream — this is a :1 bitfield! When it's set, the Endpoint uses this stream for, like, all upstream TLPs, regardless of address and RID association registers. Main character stream energy fr fr 👑
• setup — a :1 flag that tracks whether we should run pci_ide_stream_teardown for this partner slot 🧚
• enable — a :1 flag for whether to run pci_ide_stream_disable for this partner slot 💀

🌸 Description 🌸

So here's the vibe: by default, pci_ide_stream_alloc initializes mem_assoc and pref_assoc with the immediate ancestor downstream port memory ranges — and yes that means the Type 1 Configuration Space Header values, lowkey iconic 💜

The caller is allowed to zero size the range as {0, -1} to drop it from consideration at pci_ide_stream_setup time. Not me giving you an escape hatch 🕳️✨

🎀 SEE ALSO 🎀

• Kernel file ./include/linux/pci-ide.h
• struct pci_ide_regs(9)
• struct pci_ide(9)

That's the whole thing, bestie — slay responsibly 💅🌸 from ./include/linux, dated October 2026. Go forth and configure your streams, ily 🫶💖