lpfc_bg_scsi_prep_dma_buf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 lpfc_bg_scsi_prep_dma_buf — Kernel API Manual energy ✨

okay so bestie, this is a page from the Kernel API Manual about lpfc_bg_scsi_prep_dma_buf, and it's literally the wrapper function for DMA mapping of a scsi buffer using BlockGuard. let's get into it 🫶

🌸 NAME 🌸

lpfc_bg_scsi_prep_dma_buf — Wrapper function for DMA mapping of scsi buffer using BlockGuard. no cap, that's the whole vibe 💖

✨ SYNOPSIS ✨

int lpfc_bg_scsi_prep_dma_buf (struct lpfc_hba *phba , struct
lpfc_io_buf *lpfc_cmd );

that signature is giving main character energy, and yes, it returns an int 🔥

🎀 ARGUMENTS 🎀

  • phba — The Hba for which this call is being executed. like, the lpfc_hba in question 👑
  • lpfc_cmd — The scsi buffer which is going to be mapped. this is the one getting the DMA mapping treatment 💅

🦋 DESCRIPTION 🦋

so basically this routine wraps the actual DMA mapping function pointer from the lpfc_hba struct. it's a wrapper, bestie — that's the whole point of it ✨

Return codes, and this part is important so pay attention:

  • 1 — Error 😭
  • 0 — Success 💖
fr fr, don't mix those up. 1 is the bad ending, 0 is the slay ending.

🌈 SEE ALSO 🌈

Kernel file ./drivers/scsi/lpfc/lpfc_scsi.c — yes, that's the file, go look at it if you want the full lore 📂

and here's the whole friend group, every single one, no skips:

that's the whole page, bestie. source/version is ./drivers/scsi/lpfc, dated October 2026 — so go forth and map those DMA buffers, ily, mwah 💋💜

📦 where this page comes from