genwqe_free_sync_sgl(9)

💅 genwqe_free_sync_sgl(9) — like, the Kernel API Manual page, bestie

okay so this is genwqe_free_sync_sgl(9) from the Kernel API Manual, and honestly? it's the cleanup queen of the genwqe world. she's here to free stuff after the party's over and she does it flawlessly. 🎀

---

✨ NAME ✨

genwqe_free_sync_sgl — frees the memory for the sgl and the overlapping pages. no cap, that's literally her whole job. 🌸

---

🦋 SYNOPSIS 🦋

int genwqe_free_sync_sgl (struct genwqe_dev *cd , struct genwqe_sgl *sgl
);

like, she takes two things and hands you back an int. iconic signature tbh. ✨

---

💖 ARGUMENTS 💖

• cd — the genwqe device descriptor. it's giving "your vibe pass to the device" energy 🫶
• sgl — the scatter gather list describing user-space memory. yes bestie, the actual list. she knows it. 👑

---

🔥 DESCRIPTION 🔥

so here's the timeline. once the DMA transfer has been completed, we free the memory for the sgl and the cached pages. periodt. 💅

and the data? it's being transferred from those cached pages into user-space buffers. so like, the pages did their job, the buffers got fed, and now everybody can go home. 🌈

lowkey the whole point: DMA done → free the sgl memory → free the cached pages → data lands in user-space buffers. that's the order of events, don't come for me. 😭

---

🧚 SEE ALSO 🧚

Kernel file ./drivers/misc/genwqe/card_utils.c, plus this whole friend group:

• __genwqe_writeq(9)
• __genwqe_readq(9)
• __genwqe_writel(9)
• __genwqe_readl(9)
• genwqe_read_app_id(9)
• genwqe_init_crc32(9)
• genwqe_crc32(9)
• genwqe_user_vmap(9)
• genwqe_user_vunmap(9)
• genwqe_card_type(9)
• genwqe_card_reset(9)
• genwqe_set_interrupt_capability(9)
• genwqe_reset_interrupt_capability(9)
• set_reg_idx(9)
• genwqe_ffdc_buff_size(9)
• genwqe_ffdc_buff_read(9)
• genwqe_write_vreg(9)
• genwqe_read_vreg(9)
• genwqe_base_clock_frequency(9)
• genwqe_stop_traps(9)
• genwqe_start_traps(9)

like, read them all, iykyk. 📚✨

---

aaaand that's the page!! 🎀 big slay to ./drivers/misc/genwqe for making it happen — dated October 2026, mwah, hope this helped bestie 💜🫶