nfp_cpp_writel(9)

✨ nfp_cpp_writel ✨

okay so welcome to the Kernel API Manual entry for nfp_cpp_writel, and bestie you're gonna slay this one, it's literally just "write a number somewhere" 💅

---

🌸 NAME 🌸

nfp_cpp_writel — write a u32 word to a CPP location. that's it. that's the whole vibe 🎀

---

🦋 SYNOPSIS 🦋

int nfp_cpp_writel (struct nfp_cpp *cpp , u32 cpp_id , unsigned long
long address , u32 value );

like yes she takes four arguments, don't panic, we'll go through them one by one 🫶

---

💖 ARGUMENTS 💖

• cpp — the CPP device handle. your main character struct pointer, the whole reason we're here ✨
• cpp_id — the CPP ID for the operation. iykyk, it tells the hardware which thing we're talking to 🔥
• address — the address for the operation. yes it's an unsigned long long, she's long, she's got range 💀
• value — the value to write. a u32, so keep it cute and keep it 32-bit 👑

---

⭐ RETURN ⭐

0 on success, or -ERRNO if it's giving failure 😭 so like, check it, bestie, don't just assume it ate 🙈

---

🌈 SEE ALSO 🌈

• the kernel file ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpplib.c — go read the source, it's iconic
• nfp_cpp_readl(9)
• nfp_cpp_readq(9)
• nfp_cpp_writeq(9)
• nfp_cpp_map_area(9)

like the whole friend group fr fr, readl and readq are the readers, writeq is the big sister of this function, and map_area is doing her own thing mapping areas 💜

---

ngl this one's short and sweet — no weird edge cases listed, no warnings, no bugs section, just a clean little write. periodt. 🍓

---

and that's the page bestie!! 🧚 source/version is ./drivers/net/ethernet/netrono... and it's dated October 2026, so like, future vibes only ⭐💖 see you in the next manpage, mwah 🎀