afu_dma_map_region(9)

💅 afu_dma_map_region(9) — Kernel API Manual 💅

okay bestie, welcome to the afu_dma_map_region(9) page from the Kernel API Manual. it's giving “map a memory region for dma” and honestly? iconic. 💖

🌸 NAME 🌸

afu_dma_map_region — map memory region for dma

✨ SYNOPSIS ✨

       int afu_dma_map_region (struct dfl_feature_dev_data *fdata , u64
       user_addr , u64 length , u64 *iova );

🎀 ARGUMENTS 🎀

• fdata — feature dev data.
• user_addr — address of the memory region.
• length — size of the memory region.
• iova — pointer of iova address.

💖 DESCRIPTION 💖

So this maps the memory region defined by user_addr and length, then returns the dma address of the memory region via iova. no cap, that's the whole deal. ✨

It returns 0 for success — slay — otherwise you get an error code. 💅

🦋 SEE ALSO 🦋

• Kernel file: ./drivers/fpga/dfl-afu-dma-region.c
• afu_dma_pin_pages(9)
• afu_dma_unpin_pages(9)
• afu_dma_check_continuous_pages(9)
• dma_region_check_iova(9)
• afu_dma_region_add(9)
• afu_dma_region_remove(9)
• afu_dma_region_destroy(9)
• afu_dma_region_find(9)
• afu_dma_region_find_iova(9)
• afu_dma_unmap_region(9)

mwah 💋 cute lil sign-off: source/version is ./drivers/fpga, date is October 2026, and the page is afu_dma_map_region(9). bye bestie, go map that region 🫶💜