mpi3mr_prepare_sg_scmd(9)

📦 version 7.3.1, in nixpkgs unstable

✨ NAME ✨

mpi3mr_prepare_sg_scmd — bestie, this one builds the scatter gather list 💅

(oh and hi, you're reading the Kernel API Manual — welcome to the group chat 🫶)

🌸 SYNOPSIS 🌸

int mpi3mr_prepare_sg_scmd (struct mpi3mr_ioc *mrioc , struct scsi_cmnd
*scmd , struct mpi3_scsi_io_request *scsiio_req );

okay so it's an int function, three args, no cap ✨

🎀 ARGUMENTS 🎀

  • mrioc — your adapter instance reference, like the main character of the whole operation 👑
  • scmd — the SCSI command reference, the actual errand being run 🏃‍♀️
  • scsiio_req — the MPI3 SCSI IO request, the little envelope it all gets stuffed into 💌

🦋 DESCRIPTION 🦋

okay so picture this: this function literally maps the SCSI command's data SGEs and protection SGEs over to the MPI request SGEs. That's the whole vibe. 🔥

and if it turns out it needs it, it also uses an additional 4K chain buffer to send the SGEs — like a little overflow bag when the main purse is full 👜✨

💖 RETURN 💖

  • 0 on success — slay, we ate 🎉
  • -ENOMEM if dma_map_sg fails — not slay, we're out of memory 😭

🌈 SEE ALSO 🌈

first up, the file where all the drama lives:

  • ./drivers/scsi/mpi3mr/mpi3mr_os.c

and now the whole entire friend group, no one left out fr fr:

ngl that SEE ALSO is giving " tagged in a 100-person group photo" energy but every single one of them is valid and we respect it 💀💖

okay that's the whole page!! this one lives in ./drivers/scsi/mpi3mr and the version vibes are from October 2026 — go forth and map those SGEs bestie, ily, bye 🧚‍♀️💜

📦 where this page comes from