STRUCT XE_HW_FENCE_IRQ(9)

💅 struct xe_hw_fence_irq(9) 💅

okay bestie, welcome to the Kernel API Manual section for struct xe_hw_fence_irq — the hardware fence IRQ handler. yes it's a whole struct, yes it's iconic, let's get into it ✨

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🌸 NAME 🌸

struct xe_hw_fence_irq — the hardware fence IRQ handler, fr fr. this is the little guy that handles your interrupt requests for hardware fences 💖

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✨ SYNOPSIS ✨

struct xe_hw_fence_irq {
    spinlock_t lock;
    struct irq_work work;
    struct list_head pending;
    bool enabled;
};

look at that struct. she's gorgeous. four members, zero notes 🎀

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🎀 MEMBERS 🎀

• lock — a spinlock_t that protects all xe_hw_fences plus the pending list. like, she's the bouncer at the club and nobody gets past her, no cap 🔒
• work — the struct irq_work IRQ worker that gets run to signal the fences. it's giving "main character who does the actual work" energy 👑
• pending — a struct list_head holding the list of pending xe_hw_fences. the queue of fences waiting for their moment 🌈
• enabled — a bool that says whether fence signaling is enabled. on or off, babe, that's the whole vibe check ⭐

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💖 DESCRIPTION 💖

so here's the tea: there's one of these per engine class, and its whole job is signaling completed xe_hw_fences, triggered via the hw engine interrupt 🔥

on each trigger, it searches the list of pending fences and signals. that's it. that's the whole personality. lowkey efficient, highkey essential 💅

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/gpu/drm/xe/xe_hw_fence_types.h
• struct xe_hw_fence_ctx(9)
• struct xe_hw_fence(9)

go read those too, iykyk 🫶

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okay that's the whole page! this cutie lives under ./drivers/gpu/drm/xe, dated October 2026, and it's literally filed under struct xe_hw_fence_irq(9). periodt. 💜🌸