rsu_device_..._from_packed(9)

💅 rsu_device_..._from_packed(9) 💅

okay bestie, so we're deep in the Kernel API Manual today and this page is literally called rsu_device_..._from_packed(9) — yes the ellipsis is part of the name, no I will not be explaining that, it's giving "someone let the function name run wild at the christening" 💀

---

✨ NAME ✨

rsu_device_info_set_from_packed — decodes one single RSU device-info SMC word. one. that's the whole job. she's focused, she's specific, she's an icon 🎀

---

🌸 SYNOPSIS 🌸

void rsu_device_info_set_from_packed (struct flash_device_info *di ,
unsigned long packed );

like, no return value, no drama, void and done 🫶

---

🦋 ARGUMENTS 🦋

• di — the slot you're filling, bestie. it's a struct flash_device_info * and she's the destination. it's giving "you had one job and it was to be filled" ✨
• packed — the register value, and listen, she's PACKED for a reason 🎀 here's the bit layout, do not mix these up:
  • [63:32] — the erase_size lives up here
  • [31:0] — the size lives down here

and the whole thing comes from INTEL_SIP_SMC_RSU_GET_DEVICE_INFO, iykyk 💜

ngl, the high half and low half split is exactly the kind of thing where you glance and go "yeah yeah whatever" and then you swap them and everything is undone 😭 check your bit ranges, babes every single time

---

👑 SEE ALSO 👑

go off, go read these, they're the whole friend group 🫶

• Kernel file ./drivers/firmware/stratix10-rsu.c struct stratix10_rsu_priv(9)
• rsu_device_info_invalidate(9)
• rsu_status_callback(9)
• rsu_async_status_callback(9)
• rsu_command_callback(9)
• rsu_retry_callback(9)
• rsu_max_retry_callback(9)
• rsu_dcmf_version_callback(9)
• rsu_dcmf_status_callback(9)
• rsu_get_device_info_callback(9)
• rsu_async_get_spt_table_callback(9)
• __rsu_send_msg_locked(9)
• rsu_send_msg(9)
• rsu_try_send_msg(9)
• soc64_async_callback(9)
• rsu_send_async_msg(9)

like, that's a whole group chat and every one of them is a callback, periodt 🔥

---

and that's the page, mwah 💖 this came out of ./drivers/firmware in October 2026 — kernel API manual, version of the same name, slay. go decode your little word, bestie, you're gonna do amazing 🌈⭐