RECEIVE A GSP MESSAGE QUEUE ELEMENT(9)

💅 Receive a GSP message queue element

okay so this is from the Kernel API Manual bestie, and it's literally all about getting a GSP message queue element out of the message queue. it's giving four-step routine, and every step is a whole little moment. let's go 🎀

✨ DESCRIPTION ✨

Receiving a GSP message queue element from the message queue is like a tiny four-act play, and here's the whole plot:

1. Peek the element from the queue — that's r535_gsp_msgq_peek doing its thing 👀. You peek the first page of the element to figure out the total size of the message before you allocate the proper memory. no cap, you gotta look before you leap.
2. Allocate memory for the message — once the total size of the message is determined from the GSP message queue element, the caller of r535_gsp_msgq_recv is the one who allocates the required memory. yes bestie, that's on you 🫶
3. Receive the message — enter r535_gsp_msgq_recv. it copies the message into the allocated memory and advances the read pointer. now here's the iconic part: if the message is a large GSP message, r535_gsp_msgq_recv calls r535_gsp_msgq_recv_one_elem repeatedly to receive continuation parts until the complete message is received 🔥. and r535_gsp_msgq_recv assembles the payloads of the continuation parts into the return of the large GSP message. assembling the girls, fr fr.
4. Free the allocated memory — that's r535_gsp_msg_done's cue. and lowkey important: the user is responsible for freeing the memory allocated for the GSP message pages after they have been processed 💀 don't just leave it there, that's not the vibe.

⭐ real talk: step 4 is not optional, bestie — you allocated it, you free it, after you've processed it. main character energy includes cleanup.

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c
• GSP message queue element(9)

and that's the whole page, periodt 💅 this lil gem lives over at ./drivers/gpu/drm/nouveau/nvkm... and it's dated October 2026 — go off, you now know the whole GSP message queue element receipt situation 🦋✨