Greetings,
Following patches add SR-IOV capability support to the Linux kernel. With these
patches, people can turn a PCI device with the capability into multiple ones
from software perspective.
[PATCH 1/4 v2] PCI: introduce new base functions
[PATCH 2/4 v2] PCI: support ARI capability
[PATCH 3/4 v2] PCI: support SR-IOV capability
[PATCH 4/4 v2] PCI: document the change
Thanks to Randy Dunlap for carefully reviewing the document change.
And also thank Greg KH, Grant Grundler and Jesse Barnes for their comments on
the initial version.
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Single Root I/O Virtualization (SR-IOV) capability defined by PCI-SIG is
intended to enable multiple system software to share PCI hardware resources. PCI
device that supports this capability can be extended to one Physical Functions
plus multiple Virtual Functions. Physical Function, which could be considered as
the "real" PCI device, reflects the hardware instance and manages all
physical resources. Virtual Functions are associated with a Physical Function
and shares physical resources with the Physical Function. Software can control
allocation of Virtual Functions via registers encapsulated in the capability
structure.
SR-IOV specification can be found at
http://www.pcisig.com/members/downloads/specifications/iov/sr-iov1.0_11Sep07.pdf
Devices that support SR-IOV are available from following vendors:
http://download.intel.com/design/network/ProdBrf/320025.pdf
http://www.netxen.com/products/chipsolutions/NX3031.html
http://www.neterion.com/products/x3100.html
