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$FreeBSD$
.Dd January 8, 2010 .Dt SIBA 4 .Os .Sh NAME .Nm siba .Nd Sonic Inc. Silicon Backplane driver .Sh SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: d -ragged -offset indent .Cd "device siba" .Ed
p Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : d -literal -offset indent siba_load="YES" .Ed .Sh DESCRIPTION The .Nm driver supports the Sonic Inc. Silicon Backplane, the interblock communications architecture that can be found in most Broadcom wireless NICs.
p A bus connects all of the Silicon Backplane's functional blocks. These functional blocks, known as cores, use the Open Core Protocol (OCP) interface to communicate with agents attached to the Silicon Backplane.
p Each NIC uses a chip from the same chip family. Each member of the family contains a different set of cores, but shares basic architectural features such as address space definition, interrupt and error architecture, and backplane register definitions.
p Each core can have an initiator agent that passes read and write requests onto the system backplane and a target agent that returns responses to those requests. Not all cores contain both an initiator and a target agent. Initiator agents are present in cores that contain host interfaces (PCI, PCMCIA), embedded processors (MIPS), or DMA processors associated with communications cores.
p All cores other than PCMCIA have a target agent. .Sh SEE ALSO .Xr bwn 4 .Sh HISTORY The .Nm device driver first appeared in .Fx 8.0 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Bruce M. Simpson .Aq bms@FreeBSD.org and .An Weongyo Jeong .Aq weongyo@FreeBSD.org . .Sh CAVEATS Host mode is not supported at this moment.