RIO_LOP_WRITE(9)

💅 RIO_LOP_WRITE(9) — like, the Kernel API Manual's cutest little macro 🎀

okay so bestie, welcome to the Kernel API Manual ✨ this one's a macro page, and it's genuinely so niche and so iconic. it lives in the rapidio corner of the kernel and it's giving "glamorous code generator" energy fr fr 💖

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🦋 NAME 🦋

RIO_LOP_WRITE — the macro that generates all your rio_local_write_config_* functions for you. yes, it's a macro that makes functions. main character behavior tbh 👑

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🌸 SYNOPSIS 🌸

RIO_LOP_WRITE (size , type , len );

that's it. three arguments, no notes. slay 💅

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✨ ARGUMENTS ✨

• size — the size of the configuration space write, and it's in bits: 8, 16, 32. pick one, bestie 🎀
• type — the C type of the value argument. that's the type of the thing you're writing, iykyk 🦋
• len — the length of the configuration space write, and this one's in bytes: 1, 2, 4. don't mix up your bits and bytes, that's the vibe check 😭

ngl the size in bits vs len in bytes thing is a whole moment. 8/16/32 bits, 1/2/4 bytes. they match up, it's fine, it's cute, we love a consistent ratio 💀

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💜 DESCRIPTION 💜

so what does it actually do? it generates the rio_local_write_config_* functions, which are the functions you use to access configuration space registers on the local device. that's the whole thing. macro goes in, config-write functions come out 🧚✨

like, you don't call this to write a register — you call this to make the functions that write the register. it's the behind-the-scenes icon, the main character's stylist, the reason the whole thing works 🔥

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/rapidio/rio-access.c — go read it, it's where the magic lives 📁
• RIO_LOP_READ(9) 💖
• RIO_OP_READ(9) 💖
• RIO_OP_WRITE(9) 💖
• rio_mport_send_doorbell(9) 🔔 (yes that's the real name and yes it's iconic)

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aaand that's the page, bestie 🫶 it's from ./drivers/rapidio, dated October 2026, and honestly? obsessed. go forth and generate those config-write functions ✨💅🎀