intel_gt_mcr_read_any_fw(9)

💅 intel_gt_mcr_read_any_fw(9) 💅

okay so this is a page from the Kernel API Manual, bestie, and it's all about intel_gt_mcr_read_any_fw — literally the function that reads one instance of an MCR register. no cap, that's the whole vibe. 🎀

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✨ NAME ✨

intel_gt_mcr_read_any_fw — reads one instance of an MCR register 🦋

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🌸 SYNOPSIS 🌸

u32 intel_gt_mcr_read_any_fw (struct intel_gt *gt , i915_mcr_reg_t reg
);

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💖 ARGUMENTS 💖

• gt — the GT structure, like, the whole graphics tile situation 🫶
• reg — the register you're trying to read. the one. the main character.

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👑 DESCRIPTION 👑

so it reads a GT MCR register. and here's the cute part: the read gets steered to a non-terminated instance — i.e., one that isn't fused off and isn't powered down by power gating. it sniffs out a live one for you. iconic behavior tbh. ✨

⚠️ lowkey important: this function assumes the caller is already holding any necessary forcewake domains. it does NOT go get them for you. if you want forcewake to be obtained automatically, use intel_gt_mcr_read_any instead. iykyk. 💅

and it returns the value from a non-terminated instance of reg. that's it, that's the tea. 🍓

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🔥 CONTEXT 🔥

the caller must hold gt->mcr_lock. like, non-negotiable. no lock, no read. periodt. 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/gt/intel_gt_mcr.c
• GT Multicast/Replicated (MCR) Register Support(9)
• intel_gt_mcr_lock(9)
• intel_gt_mcr_unlock(9)
• intel_gt_mcr_lock_sanitize(9)
• intel_gt_mcr_read(9)
• intel_gt_mcr_unicast_write(9)
• intel_gt_mcr_multicast_write(9)
• intel_gt_mcr_multicast_write_fw(9)
• intel_gt_mcr_multicast_rmw(9)
• intel_gt_mcr_get_nonterminated_steering(9)
• intel_gt_mcr_read_any(9)
• intel_gt_mcr_get_ss_steering(9)
• intel_gt_mcr_wait_for_reg(9)

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anyway that's the whole page, bestie — go read some registers responsibly 🧚💜

🌟 sign-off szn: this slay little page lives in ./drivers/gpu/drm/i915/gt and it's dated October 2026. save it, screenshot it, put it on your fridge. mwah 💋