i915_gem_ob...t_17_swizzle(9)

💖 i915_gem_object_save_bit_17_swizzle(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for i915_gem_object_save_bit_17_swizzle(9), and honestly? It's a tiny little function with a big job. Let's get into it 🫶

🌸 NAME 🌸

i915_gem_object_save_bit_17_swizzle — save bit 17 swizzling 💅

✨ SYNOPSIS ✨

void i915_gem_object_save_bit_17_swizzle (struct drm_i915_gem_object
*obj , struct sg_table *pages );

no cap, that's the whole signature — short and sweet, just like we like it 🎀

🦋 ARGUMENTS 🦋

• obj — the i915 GEM buffer object 🌈 (the main character of this whole story, fr)
• pages — the scattergather list of physical pages 💫

👑 DESCRIPTION 👑

Okay so here's the vibe: this function saves the bit 17 of each page frame number so that swizzling can be fixed up later on with i915_gem_object_do_bit_17_swizzle 🧚✨

Think of it like taking a little screenshot of the bit 17 situation before things get moved around — because later, somebody's gonna need that info. iykyk 💅

⚠️ Real talk though: this must be called before the backing storage can be unpinned. Not optional, not "eh I'll do it later" — before, periodt. 🔥

🌟 SEE ALSO 🌟

• Kernel file ./drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c fence register handling(9) 🎀
• i915_vma_revoke_fence(9)
• i915_vma_pin_fence(9)
• i915_reserve_fence(9)
• i915_unreserve_fence(9)
• intel_ggtt_restore_fences(9)
• tiling swizzling details(9) 👀
• detect_bit_6_swizzle(9)
• i915_gem_object_do_bit_17_swizzle(9) — the sequel bestie, the one that fixes up everything this one saved 💖

so anyway, that's the whole page — short, iconic, and honestly kind of a team player 🫶 This edition came from ./drivers/gpu/drm/i915/gt and it's dated October 2026, mwah 💋✨