genwqe_execute_ddcb(9)

💅 genwqe_execute_ddcb — the kernel API manual page, but make it make sense

okay so bestie, welcome to genwqe_execute_ddcb(9) 💖 this is a page from the Kernel API Manual and honestly it's a tiny one but it's lowkey iconic. let's get into it ✨

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🎀 NAME

genwqe_execute_ddcb — Execute DDCB using userspace address fixups 🦋

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🌸 SYNOPSIS

int genwqe_execute_ddcb (struct genwqe_file *cfile , struct
       genwqe_ddcb_cmd *cmd );

like yes bestie that's the whole signature, no notes 💅

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🧚 ARGUMENTS

• cfile — the descriptor of the opened file 🫶 this is literally the handle to the file you've got open.
• cmd — the command identifier, and no cap it's passed from user 👀 so it came from userspace, not from you.

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🦋 DESCRIPTION

so the way this works is: the code will build up the translation tables, or it'll look up the contiguous memory allocation table to find the right translations and DMA addresses 💖 that's the whole vibe — you either make the tables fresh or you go find the ones that already exist ✨

lowkey it's giving "search the group chat for the info you already have before typing it again" behavior 😭 and honestly? relatable.

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👑 SEE ALSO

the kernel file ./drivers/misc/genwqe/card_dev.c (the source of truth fr fr) plus this whole bestie lineup:

• 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)
• ddcb_cmd_fixups(9)
• genwqe_ioctl(9)
• genwqe_device_create(9)
• genwqe_device_remove(9)

like a whole squad 🌈 go read them, iykyk 🍓

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⭐ sign-off

this page lives under <lavender>./drivers/misc/genwqe</lavender> and it's dated October 2026 🎀 that's the source, the version, and the date all wrapped up — periodt 💜

go slay some DMA addresses bestie, ily, bye 🫶✨