iommu_map_sgtable(9)

🌸 iommu_map_sgtable(9) — like, the Kernel API Manual bestie 💅

okay so this one is iommu_map_sgtable from the Kernel API Manual and honestly? she's the one who actually gets your buffer mapped ✨ buckle up 🎀

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✨ NAME ✨

iommu_map_sgtable — Map the given buffer to the IOMMU domain 🗺️💖

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🦋 SYNOPSIS 🦋

ssize_t iommu_map_sgtable (struct iommu_domain *domain , unsigned long
       iova , struct sg_table *sgt , int prot );

no cap, that's the whole signature 🔥

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🎀 ARGUMENTS 🎀

• domain — The IOMMU domain to perform the mapping 👑 this is the vibe, the venue, the whole domain you're operating in
• iova — The start address to map the buffer 📍 like where it's gonna live
• sgt — The sg_table object describing the buffer 🌸 she's the scatterlist container, the description of what you're mapping
• prot — IOMMU protection bits 🛡️ the permissions, the boundaries, the "what can u do" of it all

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💜 DESCRIPTION 💜

So what she does is: Creates a mapping at iova for the buffer described by a scatterlist stored in the given sg_table object in the provided IOMMU domain 💫

that's it, that's the whole thing, and she ate 🍓 literally just: give her a domain, an iova, an sgt, and she makes the mapping happen for the scatterlist-stored buffer inside that domain. main character energy fr fr 🌈

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💀 SEE ALSO 💀

Kernel file ./include/linux/iommu.h — plus the whole squad, and bestie there are so many, i listed every single one because i love u 🫶:

• struct iommu_fault_page_request(9)
• struct iommu_fault(9)
• enum iommu_page_response_code(9)
• struct iommu_page_response(9)
• struct iopf_queue(9)
• struct iommu_resv_region(9)
• struct iommu_iotlb_gather(9)
• struct iommu_dirty_bitmap(9)
• struct iommu_dirty_ops(9)
• struct iommu_user_data(9)
• struct iommu_user_data_array(9)
• __iommu_copy_struct_from_user(9)
• iommu_copy_struct_from_user(9)
• __iommu_copy_struct_from_user_array(9)
• iommu_copy_struct_from_user_array(9)
• iommu_copy_struct_from_full_user_array(9)
• __iommu_copy_struct_to_user(9)
• iommu_copy_struct_to_user(9)
• struct iommu_ops(9)
• struct iommu_domain_ops(9)
• struct iommu_device(9)
• struct iommu_fault_param(9)
• struct dev_iommu(9)
• iommu_iotlb_gather_is_disjoint(9)
• iommu_iotlb_gather_add_range(9)
• iommu_iotlb_gather_add_page(9)
• struct iommu_fwspec(9)
• struct iommu_sva(9)

ngl that's a long list but every one of them earned her spot 💅 go read them, iykyk 😭

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and that's the page!! she lives in ./include/linux and she's dated October 2026 ⭐ ok bye bestie, go map something iconic 👑💖🧚