_ctl_send_mctp_passthru_req(9)

📦 version 7.3.1, in nixpkgs unstable

💅 NAME 💅

_ctl_send_mctp_passthru_req — literally just sending an MCTP passthru request, bestie 💖 (this is the _ctl_send_mctp_passthru_req(9) kernel API manual, and yes we're getting into it)

✨ SYNOPSIS ✨

void _ctl_send_mctp_passthru_req (struct MPT3SAS_ADAPTER *ioc ,
Mpi26MctpPassthroughRequest_t *mctp_passthru_req , void *psge ,
dma_addr_t data_out_dma , int data_out_sz , dma_addr_t data_in_dma , int
data_in_sz , u16 smid );

okay so it returns void — meaning it does the thing and does not come back to tell you how it went. it's giving "i did it, don't ask questions" energy 💀

🎀 ARGUMENTS 🎀

Eight (8) arguments, no cap, let's go through every single one because we do not skip 💅

  • ioc — the per adapter object 🦋 like, the actual adapter we're talking to. main character of the whole file ngl.
  • mctp_passthru_req — the MPI mctp passhthru request from the caller 🙈 (yes the original spells it passhthru — she said what she said, we're keeping it, periodt).
  • psge — pointer to the H2DSGL 👑 this is the hookup, treat her with respect.
  • data_out_dma — DMA buffer for the H2D SGL ⭐
  • data_out_sz — H2D length, i.e. how much is going out 🌸
  • data_in_dma — DMA buffer for the D2H SGL ⭐
  • data_in_sz — D2H length, i.e. how much is coming back 🌈
  • smid — the SMID to submit the request with 🔥 that's the ticket, bestie.
fr fr: H2D = host to device, D2H = device to host, and you need BOTH buffers plus their sizes, plus the SGL pointer and the SMID. no shortcuts, we love a complete call signature 💖

🦋 SEE ALSO 🦋

Kernel file ./drivers/scsi/mpt3sas/mpt3sas_ctl.c — go read her, she's iconic. and then there's... gestures vaguely at the entire rest of the driver — okay buckle up, because this list is LONG and every single one of these is in the group chat 💜

like I said. EVERYONE is here. it's a whole reunion episode 🫶 see also: your entire weekend 😭

and that's the page, bestie — shoutout to ./drivers/scsi/mpt3sas for hosting this whole situation, dated October 2026, filed under _ctl_send_mctp_passthru_req(9) ✨ slay, go send your request, iykyk 💖🎀

📦 where this page comes from