ddcb_cmd_fixups(9)

ddcb_cmd_fixups(9) — Kernel API Manual 💅✨

okay bestie, welcome to the Kernel API Manual page for ddcb_cmd_fixups(9) — manual name folded in near the top, cute and done 🫶

🌸 NAME 🌸

ddcb_cmd_fixups — Establish DMA fixups/sglists for user memory references.

✨ SYNOPSIS ✨

int ddcb_cmd_fixups (struct genwqe_file *cfile , struct ddcb_requ *req
);

🎀 ARGUMENTS 🎀

• cfile — descriptor of opened file. Yep, that’s the file descriptor context, bestie.
• req — DDCB work request. The work request itself, no cap.

🦋 DESCRIPTION 🦋

Before the DDCB gets executed, we need to handle the fixups. Literally the whole pre-execution vibe: we replace the user-space addresses with DMA addresses, or we do additional setup work, e.g. generating a scatter-gather list which is used to describe the memory referred to in the fixup. That’s the fixup moment. 💖

🔥 SEE ALSO 🔥

Kernel file ./drivers/misc/genwqe/card_dev.c:

• genwqe_search_pin(9)
• __genwqe_search_mapping(9)
• genwqe_kill_fasync(9)
• genwqe_open(9)
• genwqe_fasync(9)
• genwqe_release(9)
• genwqe_vma_close(9)
• genwqe_mmap(9)
• do_flash_update(9)
• ddcb_cmd_cleanup(9)
• genwqe_execute_ddcb(9)
• genwqe_ioctl(9)
• genwqe_device_create(9)
• genwqe_device_remove(9)

xoxo, your kernel bestie 💋 — source/version is ./drivers/misc/genwqe, date is October 2026, and this iconic page is ddcb_cmd_fixups(9). Slay. ✨