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Groups > linux.kernel > #1257746
| From | Christian Borntraeger <borntraeger@de.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v3 0/3] virtio DMA API core stuff |
| Date | 2015-10-28 08:50 +0100 |
| Message-ID | <qotEC-89q-1@gated-at.bofh.it> (permalink) |
| References | <qosyS-7ut-7@gated-at.bofh.it> <qotbz-7YX-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Am 28.10.2015 um 16:17 schrieb Michael S. Tsirkin: > On Tue, Oct 27, 2015 at 11:38:57PM -0700, Andy Lutomirski wrote: >> This switches virtio to use the DMA API unconditionally. I'm sure >> it breaks things, but it seems to work on x86 using virtio-pci, with >> and without Xen, and using both the modern 1.0 variant and the >> legacy variant. > > I'm very glad to see work on this making progress. > > I suspect we'll have to find a way to make this optional though, and > keep doing the non-DMA API thing with old devices. And I've been > debating with myself whether a pci specific thing or a feature bit is > preferable. > We have discussed that at kernel summit. I will try to implement a dummy dma_ops for s390 that does 1:1 mapping and Ben will look into doing some quirk to handle "old" code in addition to also make it possible to mark devices as iommu bypass (IIRC, via device tree, Ben?) Christian > Thoughts? > >> Changes from v2: >> - Fix really embarrassing bug. This version actually works. >> >> Changes from v1: >> - Fix an endian conversion error causing a BUG to hit. >> - Fix a DMA ordering issue (swiotlb=force works now). >> - Minor cleanups. >> >> Andy Lutomirski (3): >> virtio_net: Stop doing DMA from the stack >> virtio_ring: Support DMA APIs >> virtio_pci: Use the DMA API >> >> drivers/net/virtio_net.c | 53 +++++++---- >> drivers/virtio/Kconfig | 2 +- >> drivers/virtio/virtio_pci_common.h | 3 +- >> drivers/virtio/virtio_pci_legacy.c | 19 +++- >> drivers/virtio/virtio_pci_modern.c | 34 +++++-- >> drivers/virtio/virtio_ring.c | 187 ++++++++++++++++++++++++++++++------- >> tools/virtio/linux/dma-mapping.h | 17 ++++ >> 7 files changed, 246 insertions(+), 69 deletions(-) >> create mode 100644 tools/virtio/linux/dma-mapping.h >> >> -- >> 2.4.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH v3 0/3] virtio DMA API core stuff Andy Lutomirski <luto@kernel.org> - 2015-10-28 07:40 +0100
[PATCH v3 2/3] virtio_ring: Support DMA APIs Andy Lutomirski <luto@kernel.org> - 2015-10-28 07:50 +0100
[PATCH v3 3/3] virtio_pci: Use the DMA API Andy Lutomirski <luto@kernel.org> - 2015-10-28 07:50 +0100
[PATCH v3 1/3] virtio_net: Stop doing DMA from the stack Andy Lutomirski <luto@kernel.org> - 2015-10-28 07:50 +0100
Re: [PATCH v3 1/3] virtio_net: Stop doing DMA from the stack "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 08:10 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-28 08:00 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff Andy Lutomirski <luto@amacapital.net> - 2015-10-28 08:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 08:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff Christian Borntraeger <borntraeger@de.ibm.com> - 2015-10-28 08:50 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-28 09:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 12:40 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-28 14:40 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 15:10 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-28 15:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 15:30 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-28 15:40 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 17:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff Andy Lutomirski <luto@amacapital.net> - 2015-10-29 00:00 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-29 10:10 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-29 17:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff Joerg Roedel <jroedel@suse.de> - 2015-10-30 16:20 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-30 18:00 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2015-10-28 09:40 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 12:30 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff David Woodhouse <dwmw2@infradead.org> - 2015-10-28 14:40 +0100
Re: [PATCH v3 0/3] virtio DMA API core stuff "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 15:10 +0100
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