Date: Fri, 01 May 2026 11:14:57 +0200 From: "Herbert J. Skuhra" <herbert@gojira.at> To: Andrew Turner <andrew@FreeBSD.org> Cc: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org, Sarah Walker <sarah.walker2@arm.com> Subject: Re: git: b5bad6df467c - main - virtio_net: Use bus_dma for command/ack buffers Message-ID: <87zf2jv6cu.wl-herbert@gojira.at> In-Reply-To: <69ef4ad0.1f221.796b75f@gitrepo.freebsd.org>
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On Mon, 27 Apr 2026 13:38:56 +0200, Andrew Turner wrote: > > The branch main has been updated by andrew: > > URL: https://cgit.FreeBSD.org/src/commit/?id=b5bad6df467cc95bea641afe674c55cd5b9f1510 > > commit b5bad6df467cc95bea641afe674c55cd5b9f1510 > Author: Sarah Walker <sarah.walker2@arm.com> > AuthorDate: 2026-02-27 14:17:15 +0000 > Commit: Andrew Turner <andrew@FreeBSD.org> > CommitDate: 2026-04-27 11:37:53 +0000 > > virtio_net: Use bus_dma for command/ack buffers > > While the majority of virtio platforms will be fully coherent, some may > require cache maintenance or other specific device memory handling (eg for > secure partitioning). Using bus_dma allows for these usecases. > > The virtio buffers are marked as coherent; this should ensure that sync > calls are no-ops in the common cases. > > Reviewed by: andrew > Sponsored by: Arm Ltd > Differential Revision: https://reviews.freebsd.org/D55564 > --- > sys/dev/virtio/network/if_vtnet.c | 336 +++++++++++++++++++++++++++++------ > sys/dev/virtio/network/if_vtnetvar.h | 6 + > 2 files changed, 284 insertions(+), 58 deletions(-) After this change SFTP transfers are stalling/failing: Connected to server. sftp> get file.img Fetching /home/herbert/file.img to file.img file.img 1% 35MB 0.0KB/s - stalled - No new transfer are possible after reconnecting: Connected to server. sftp> get file.img Fetching /home/herbert/file.img to file.img file.img 0% 0 0.0KB/s --:-- ETA file.img 0% 0 0.0KB/s - stalled - Read from remote host xxx Connection reset by peer client_loop: send disconnect: Broken pipe Connection closed And (during/afterwards) /var/log/messages is being filled with the following error: May 1 10:42:00 srv03 kernel: ata0: FAILURE - load data May 1 10:42:00 srv03 kernel: ata0: setting up DMA failed I am running GENERIC-NODEBUG on a amd64 system. Reverting this commit (and c16c95192f01) resolves the issue. -- Herberthome | help
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