STRUCT SMU_MSG_CONFIG(9)

✨ NAME ✨

struct smu_msg_config — IP-level register configuration 💅

okay so real quick, bestie: this page lives in the Kernel API Manual, section 9 (that's the (9) in the corner, iykyk). It's the whole tea on how this struct holds the register layout for one IP block. Let's get into it 🫶

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🌸 SYNOPSIS 🌸

struct smu_msg_config {
    u32 msg_reg;
    u32 resp_reg;
    u32 arg_regs[SMU_MSG_MAX_ARGS];
    int num_arg_regs;
    u32 debug_msg_reg;
    u32 debug_resp_reg;
    u32 debug_param_reg;
 };

no cap, that's the whole shape of it. every field is a u32 except num_arg_regs, which is a plain int — she's different like that 💖

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🎀 Members 🎀

okay so let's meet the cast, one by one. main character energy all around ⭐

• msg_reg — the message register offset. that's the spot where the message itself goes 🦋
• resp_reg — the response register offset. where the reply comes back to you, like a text you've been waiting for 😭
• arg_regs — the argument register offsets. yes, plural, it's an array — up to SMU_MSG_MAX_ARGS of them, so pack your args in there 🌸
• num_arg_regs — the number of argument registers available. this is the little counter that tells you how many slots of arg_regs are actually doing something 💅 (and yeah, she's an int, not a u32, we love a quirky queen)
• debug_msg_reg — the debug message register offset. same vibe as msg_reg but for debug ✨
• debug_resp_reg — the debug response register offset. the debug reply lives here 🎀
• debug_param_reg — the debug parameter register offset. where the debug parameters hang out 💜

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🦋 SEE ALSO 🦋

bestie you are not gonna wanna miss the rest of the lore. the kernel file lives at ./drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h, and it's all friends-of-the-family over there:

• struct smu_msg_args(9)
• struct smu_msg_ops(9)
• struct smu_msg_ctl(9)
• struct smu_temp_funcs(9)
• struct pptable_funcs(9)
• smu_memcpy_trailing(9)

go read them all, literally obsessed 🧚

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lowkey necessary reminder: the register offsets here are offsets, not values — nothing in this struct says what to put in them, it just tells you where they are 💀

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okay that's the whole page, bestie!! quick sign-off before you go: this came from ./drivers/gpu/drm/amd/pm/swsmu... and the date on it is October 2026, and the page is struct smu_msg_config(9) — slay, periodt 💖🌈👑