Linux-PCI Support Programming PCI-Devices …
Intendedtobea . . . . . . . . . . . .PCI-BridgePCI-BusPCI#0PCI#nPCI#1Figure1 :TheArchitectureofthePCISubsystemThePeri pheralComponentInterconnect-Bus(PCI)toda yis presentina widevarietyof thecom-pleteseparationof , specialcasesonlyonestartad-dressis transferredfollowedbya determinetheaddressforeachsingledata-wor dthePCI-BridgeandthePCI-Adapterincrement internalcounters, burst cy-clespeedsupthetransfersigni cantly(upto266Mbyte/secfora 64bitdata-transfer).Thankstotheintellige nthandlingof schematicviewof thePCIsubsystemis usea Memoryforcon beplacedin therightplaces,soIRQor addresscon ictsarenolongera commonlyknownasPlug& ( ) linux -PCISupportFirstContactwiththePCIs ubsystemTo getanimpressionhowlinuxseesthePCIbusinyo urcomputertrygettingthePCIbuscon gurationfromthekernelwithcat /proc/pci. If everythingworksOKyouwill(hopefully)see:P CI devicesfound:Bus0, device12, function0:SCSIstoragecontroller:AdaptecA IC-7881U(rev0).
Linux-PCI Support First Contact with the PCI subsystem To get an impression how linux sees the PCI bus in your computer try getting the PCI bus conguration from the kernel with cat /proc/pci.
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