drm/gpusvm: Use dma-map IOVA alloc, link, and sync API in GPU SVM

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The dma-map IOVA alloc, link, and sync APIs perform significantly better
than dma-map / dma-unmap, as they avoid costly IOMMU synchronizations.
This difference is especially noticeable when mapping a 2MB region in
4KB pages.

Use the IOVA alloc, link, and sync APIs for GPU SVM, which create DMA
mappings between the CPU and GPU.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patch.msgid.link/20260410205929.3914474-2-matthew.brost@intel.com

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Matthew Brost 2026-04-10 13:59:25 -07:00

parent efcd474ed2

commit 37ad039fb3

2 changed files with 50 additions and 8 deletions

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53

drivers/gpu/drm/drm_gpusvm.c

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5

include/drm/drm_gpusvm.h

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