[dpdk-dev] [PATCH v2 0/7] virtio 1.0 enabling for virtio pmd driver
Yuanhan Liu
yuanhan.liu at linux.intel.com
Tue Jan 12 08:07:13 CET 2016
On Tue, Jan 12, 2016 at 02:58:57PM +0800, Yuanhan Liu wrote:
> v2: - fix a data corruption reported by Qian, due to hdr size mismatch.
> check detailes at ptach 5.
>
> - Add missing config_irq and isr reading support from v1.
>
> - fix comments from v1.
>
> Almost all difference comes from virtio 1.0 are the PCI layout change:
> the major configuration structures are stored at bar space, and their
> location is stored at corresponding pci cap structure. Reading/parsing
> them is one of the major work of patch 7.
>
> To make handling virtio v1.0 and v0.95 co-exist well, this patch set
> introduces a virtio_pci_ops structure, to add another layer so that
> we could keep those vtpci_foo_bar "APIs". With that, we could do the
> minimum change to add virtio 1.0 support.
Oops, I just found that I missed a simple test guide here, as promised
before. And here it is:
Firstly, you need get a virtio 1.0 supported QEMU (say, v2.5), then add
option "disable-modern=false" to qemu virtio-net-pci device to enable
virtio 1.0 (which is disabled by default).
And if you see something like following from 'lspci -v', it means virtio
1.0 is indeed enabled:
00:04.0 Ethernet controller: Red Hat, Inc Virtio network device
Subsystem: Red Hat, Inc Device 0001
Physical Slot: 4
Flags: bus master, fast devsel, latency 0, IRQ 11
I/O ports at c040 [size=64]
Memory at febf1000 (32-bit, non-prefetchable) [size=4K]
Memory at fe000000 (64-bit, prefetchable) [size=8M]
Expansion ROM at feb80000 [disabled] [size=256K]
Capabilities: [98] MSI-X: Enable+ Count=6 Masked-
==> Capabilities: [84] Vendor Specific Information: Len=14 <?>
==> Capabilities: [70] Vendor Specific Information: Len=14 <?>
==> Capabilities: [60] Vendor Specific Information: Len=10 <?>
==> Capabilities: [50] Vendor Specific Information: Len=10 <?>
==> Capabilities: [40] Vendor Specific Information: Len=10 <?>
Kernel driver in use: virtio-pci
Kernel modules: virtio_pci
After that, there wasn't anything speical comparing to the old virtio
0.95 pmd driver.
--yliu
>
> ---
> Yuanhan Liu (7):
> virtio: don't set vring address again at queue startup
> virtio: introduce struct virtio_pci_ops
> virtio: move left pci stuff to virtio_pci.c
> viritio: switch to 64 bit features
> virtio: retrieve hdr_size from hw->vtnet_hdr_size
> eal: pci: export pci_map_device
> virtio: add 1.0 support
>
> doc/guides/rel_notes/release_2_3.rst | 3 +
> drivers/net/virtio/virtio_ethdev.c | 301 +---------
> drivers/net/virtio/virtio_ethdev.h | 3 +-
> drivers/net/virtio/virtio_pci.c | 768 +++++++++++++++++++++++-
> drivers/net/virtio/virtio_pci.h | 102 +++-
> drivers/net/virtio/virtio_rxtx.c | 21 +-
> drivers/net/virtio/virtqueue.h | 4 +-
> lib/librte_eal/bsdapp/eal/eal_pci.c | 2 +-
> lib/librte_eal/bsdapp/eal/rte_eal_version.map | 6 +
> lib/librte_eal/common/eal_common_pci.c | 2 +-
> lib/librte_eal/common/eal_private.h | 11 -
> lib/librte_eal/common/include/rte_pci.h | 11 +
> lib/librte_eal/linuxapp/eal/eal_pci.c | 2 +-
> lib/librte_eal/linuxapp/eal/rte_eal_version.map | 6 +
> 14 files changed, 899 insertions(+), 343 deletions(-)
>
> --
> 1.9.0
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