mei_pxp_gsc_command(9)

💅 mei_pxp_gsc_command(9)

okay so bestie, welcome to the Kernel API Manual (yes, that's the manual name, we're fancy now) — this is the whole scoop on mei_pxp_gsc_command, and honestly? it's giving "send a message, get a message back" main character energy ✨

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🦋 NAME

mei_pxp_gsc_command — sends a gsc command, by sending a sgl mei message to gsc and receiving reply from gsc 💌

like, literally the whole thing: it ships a command off to gsc, and gsc replies right back. no cap.

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✨ SYNOPSIS

ssize_t mei_pxp_gsc_command (struct device *dev , u8 client_id , u32
fence_id , struct scatterlist *sg_in , size_t total_in_len , struct
scatterlist *sg_out );

look at that signature. iconic. returns an ssize_t, which we'll get to 👑

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🎀 ARGUMENTS

one bullet at a time, bestie — every single one, don't skip:

• dev — the device corresponding to the mei_cl_device 🫶
• client_id — the client id to send the command to. it's giving "which address does this go to" fr fr
• fence_id — the fence id to send the command to 🚧
• sg_in — scatter gather list containing addresses for rx message buffer 🌸 (yes, rx — that's what it says, don't come for me)
• total_in_len — total length of data in the 'in' sg, and lowkey it can be less than the sum of buffers sizes 👀
• sg_out — scatter gather list containing addresses for tx message buffer 🌈 (tx this time — the vibes are flipped but that's the spec)

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💀 RETURN

• bytes sent on Success 🎉
• <0 on Failure 😭

that's it. that's the whole return section. periodt.

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🔥 SEE ALSO

go read these next, i'm obsessed:

• Kernel file ./drivers/misc/mei/pxp/mei_pxp.c MEI_PXP Client Driver(9)
• mei_pxp_send_message(9)
• mei_pxp_receive_message(9)
• mei_pxp_component_match(9)

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mwah 💜 that's the page! this little gem lives in ./drivers/misc/mei/pxp, it's from October 2026, and the whole thing is filed under mei_pxp_gsc_command(9) — take care of her, she's a queen 👑