[dpdk-dev] [RFC 0/3] Add mdev (Mediated device) support in DPDK
Tiwei Bie
tiwei.bie at intel.com
Wed Apr 3 09:18:41 CEST 2019
Hi everyone,
This is a draft implementation of the mdev (Mediated device [1])
bus support in DPDK. Mdev is a way to virtualize devices in Linux
kernel. Based on the device-api (mdev_type/device_api), there could
be different types of mdev devices (e.g. vfio-pci). In this RFC,
one mdev bus is introduced to scan the mdev devices in the system
and do the probe based on the device-api.
Take the mdev devices whose device-api is "vfio-pci" as an example,
in this RFC, these devices will be probed by a mdev driver provided
by PCI bus, which will plug them to the PCI bus. And they will be
probed with the drivers registered on the PCI bus based on VendorID/
DeviceID/... then.
+----------+
| mdev bus |
+----+-----+
|
+----------------+----+------+------+
| | | |
mdev_vfio_pci ......
(device-api: vfio-pci)
There are also other ways to add mdev device support in DPDK (e.g.
let PCI bus scan /sys/bus/mdev/devices directly). Comments would be
appreciated!
[1] https://github.com/torvalds/linux/blob/master/Documentation/vfio-mediated-device.txt
Thanks,
Tiwei
Tiwei Bie (3):
eal: add a helper for reading string from sysfs
bus/mdev: add mdev bus support
bus/pci: add mdev support
config/common_base | 5 +
config/common_linux | 1 +
drivers/bus/Makefile | 1 +
drivers/bus/mdev/Makefile | 41 +++
drivers/bus/mdev/linux/Makefile | 6 +
drivers/bus/mdev/linux/mdev.c | 117 ++++++++
drivers/bus/mdev/mdev.c | 310 ++++++++++++++++++++++
drivers/bus/mdev/meson.build | 15 ++
drivers/bus/mdev/private.h | 90 +++++++
drivers/bus/mdev/rte_bus_mdev.h | 141 ++++++++++
drivers/bus/mdev/rte_bus_mdev_version.map | 12 +
drivers/bus/meson.build | 2 +-
drivers/bus/pci/Makefile | 3 +
drivers/bus/pci/linux/Makefile | 4 +
drivers/bus/pci/linux/pci_vfio.c | 35 ++-
drivers/bus/pci/linux/pci_vfio_mdev.c | 305 +++++++++++++++++++++
drivers/bus/pci/meson.build | 4 +-
drivers/bus/pci/pci_common.c | 17 +-
drivers/bus/pci/private.h | 9 +
drivers/bus/pci/rte_bus_pci.h | 11 +-
lib/librte_eal/common/eal_filesystem.h | 7 +
lib/librte_eal/freebsd/eal/eal.c | 22 ++
lib/librte_eal/linux/eal/eal.c | 22 ++
lib/librte_eal/rte_eal_version.map | 1 +
mk/rte.app.mk | 1 +
25 files changed, 1163 insertions(+), 19 deletions(-)
create mode 100644 drivers/bus/mdev/Makefile
create mode 100644 drivers/bus/mdev/linux/Makefile
create mode 100644 drivers/bus/mdev/linux/mdev.c
create mode 100644 drivers/bus/mdev/mdev.c
create mode 100644 drivers/bus/mdev/meson.build
create mode 100644 drivers/bus/mdev/private.h
create mode 100644 drivers/bus/mdev/rte_bus_mdev.h
create mode 100644 drivers/bus/mdev/rte_bus_mdev_version.map
create mode 100644 drivers/bus/pci/linux/pci_vfio_mdev.c
--
2.17.1
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