linuxkpi: add dma_sync_sg_for_{cpu, device}
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Authored by zishun.yi.dev_gmail.com on Jun 23 2026, 8:49 AM.

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rG8b59c5f824aa: LinuxKPI: implement dma_sync_sg_for_{cpu, device}()
rG9dec0cd79c69: LinuxKPI: implement dma_sync_sg_for_{cpu, device}()

Summary

Add dma_sync_sg_for_{cpu, device} and dma_sync_sgtable_for_{cpu,
device}. These functions are useful for my GSoC 2026 project, udmabuf.

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rG FreeBSD src repository

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Event Timeline

zishun.yi.dev_gmail.com created this revision.Jun 23 2026, 8:49 AM

Herald added subscribers: emaste, imp. · View Herald TranscriptJun 23 2026, 8:49 AM

zishun.yi.dev_gmail.com requested review of this revision.Jun 23 2026, 8:49 AM

Harbormaster completed remote builds in B74139: Diff 180358.Jun 23 2026, 8:49 AM

zishun.yi.dev_gmail.com added a parent revision: D55497: linuxkpi: Fix DMA_BIDIRECTIONAL mapping.Jun 23 2026, 8:55 AM

emaste added a project: linuxkpi.Aug 17 2026, 5:00 PM

bz requested changes to this revision.Sep 5 2026, 9:09 AM

bz added inline comments.

sys/compat/linuxkpi/common/src/linux_pci.c
2016	I assume this is an internal helper function and not a public Linux KPI (dma_sync_sg()). Then it should be called lkpi_dma_sync_sg()

This revision now requires changes to proceed.Sep 5 2026, 9:09 AM

rename to lkpi_dma_sync_sg()

Harbormaster completed remote builds in B76562: Diff 185918.Sep 5 2026, 1:36 PM

bz accepted this revision.Sep 5 2026, 8:03 PM

This revision is now accepted and ready to land.Sep 5 2026, 8:03 PM

Closed by commit rG9dec0cd79c69: LinuxKPI: implement dma_sync_sg_for_{cpu, device}() (authored by zishun.yi.dev_gmail.com, committed by bz). · Explain WhySep 6 2026, 12:14 AM

This revision was automatically updated to reflect the committed changes.

bz added a commit: rG9dec0cd79c69: LinuxKPI: implement dma_sync_sg_for_{cpu, device}().

bz added a commit: rG8b59c5f824aa: LinuxKPI: implement dma_sync_sg_for_{cpu, device}().Sep 10 2026, 9:50 AM

Revision Contents
Changeset List

Path

Size

sys/

compat/

linuxkpi/

common/

include/

linux/

dma-mapping.h

51 lines

src/

linux_pci.c

11 lines

Diff 185984

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sys/compat/linuxkpi/common/include/linux/dma-mapping.h