Transcription of PCI Express Basics & Background
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PCI Express Basics & Background
Copyright 2014, PCI-SIG, All Rights Reserved1 PCI Express Basics & BackgroundRichard SolomonSynopsysPCIeTechnology Seminar2 AcknowledgementsThanks are due to Ravi Budruk, Mindshare, Inc. for much of the material on PCI Express Basics2 Copyright 2014, PCI-SIG, All Rights ReservedPCIeTechnology SeminarAgenda PCI Express Background PCI Express Basics PCI Express Recent DevelopmentsCopyright 2014, PCI-SIG, All Rights Reserved3 PCIeTechnology Seminar4 PCI Express BackgroundCopyright 2014, PCI-SIG, All Rights ReservedPCIeTechnology SeminarCopyright 2014, PCI-SIG, All Rights Reserved5 Revolutionary AND Evolutionary PCI (1992/1993) Revolutionary Plug and Play jumperlessconfiguration (BARs) Unprecedented bandwidth 32-bit / 33 MHz 133MB/sec 64-bit / 66 MHz 533MB/sec Designed from day 1 for bus-mastering adapters Evolutionary System BIOS maps devices then operating systems boot and run without further knowledge of PCI PCI-aware O/S could gain improved functionality PCI (1995) doubled bandwidth with 66 MHz modePCIeTechnology SeminarCopyright 2014, PCI-SIG, All Rights Reserved6 Revolutionary AND Evolutionary PCI-X (1999)
PCI-X commands added length and Routing ID of initiator Writes: allow target device to allocate buffers Reads: Pre-fetch now deterministic PCI-X retains “retry” & “disconnect”, adds “split” Telephone analogy Retry: “I’m busy go away” –Delayed transactions are complicated Split: “I’ll call you back” –Simple
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