PCIe Devices - PLX Technology

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PCIe Device and Bridge Processing n PCI bridge processing is based on ordering rules l l Based on transaction type – Rules on how, when, and if READ can pass WRITE operations – Which transactions are buffered or posted in the bridge – Whether operations can be combined or collapsed All transactions processed equally based on ordering rules Transmit Buffer TLP Read TLP Write DLLP PM Message Queued Packets Which packet goes first ??? Copyright by Dashcourses, Inc. 2009 1-40
PCIe Processing and Priorities n PCIe is based on the same bridge processing rules and adds the capability to ‘differentiate’ transactions in several ways l Differentiation provided by a ‘Traffic Class’ or TC label in a PCIe packet – TC’s are assigned to ‘Virtual Channels’ or VCs – Bridge buffer space and control logic must be provided for each VC assigned in the system n Arbitration is based on P-P bridge processing and ordering rules on a per VC basis l Arbitration on one VC is independent of arbitration on any other VC Copyright by Dashcourses, Inc. 2009 1-41
Page 1 and 2: Presents PCI Express Overview By Pa
Page 3 and 4: What This Presentation Is About n T
Page 5 and 6: Specifications n The current PCIe s
Page 7 and 8: Presentation Layout Section 1 - PCI
Page 9 and 10: PCI Specification History n n n PCI
Page 11 and 12: PCIe Compatibility and New Features
Page 13 and 14: PCIe Interconnect - Chip-to-Board C
Page 15 and 16: PCIe Design Possibilities Embedded
Page 17 and 18: Compatibility with Existing PCI Spe
Page 19 and 20: New Features n Improved data integr
Page 21 and 22: Scalable Topologies n Hierarchies u
Page 23 and 24: PCI and PCI-X Architecture and Comm
Page 25 and 26: PCIe Command Execution Host System
Page 27 and 28: PCIe Transactions and Packets n PCI
Page 29 and 30: PCI Devices n n n PCI is based on a
Page 31 and 32: PCI Topology with Multiple Host/PCI
Page 33 and 34: PCIe Device/Function PCIe Single Fu
Page 35 and 36: PCIe System Fabric PCIe Root Comple
Page 37 and 38: PCI/PCI-X/PCIe Bridges n Bridges ar
Page 39: PCI/PCI-X Arbitration Example n n F
Page 43 and 44: Mythical Example VC ID and Priority
Page 45 and 46: PCIe Root Complex n A Root Complex
Page 47 and 48: PCIe Root Complex Model Host system
Page 49 and 50: PCIe Switch Structure Upstream Port
Page 51 and 52: PCIe Interrupts Host System Bus Whe
Page 53 and 54: PCIe Link is a Point-to-Point Conne
Page 55 and 56: PCIe Differential Drivers n PCIe de
Page 57 and 58: PCIe Link Attributes (continued) n
Page 59 and 60: PCIe Can be Aggregated n PCIe devic
Page 61 and 62: MBps vs. Gbps?? n Comparing data ra
Page 63 and 64: PCI Configuration Header Types n Fi
Page 65 and 66: PCI Configuration Header Type 0 PCI
Page 67 and 68: Host PCI Bridge Discovery n n n Acc
Page 69 and 70: PCIe Primary/Secondary Bus Scheme P
Page 71 and 72: Optional Registers (continued) Last
Page 73 and 74: PCIe Configuration Space DWord 1000
Page 75 and 76: Key Aspects of Transaction Layer n
Page 77 and 78: PCIe Transactions n Software will t
Page 79 and 80: Address Space and Transaction Type
Page 81 and 82: TLP size Varies n TLP construction
Page 83 and 84: PCIe Transaction Movement Host Syst
Page 85 and 86: TLP Packet Components n TLP packets
Page 87 and 88: TLP Receiver Processing n Received
Page 89 and 90: Message Codes n Messages are define
Page 91 and 92:
Section 3 PCIe Data Link Layer Copy
Page 93 and 94:
Key Aspects of Data Link Layer n At
Page 95 and 96:
Data Link Layer Created Packets - T
Page 97 and 98:
Data Link Layer Received Packets Pa
Page 99 and 100:
Data Link Layer Handling of TLPs n
Page 101 and 102:
Link Initialization and Flow Contro
Page 103 and 104:
Initialization n Example TS1/TS2 l
Page 105 and 106:
Flow Control n Example credit excha
Page 107 and 108:
Basic DLLP Header Fields n All Data
Page 109 and 110:
Transaction Layer Buffer Space and
Page 111 and 112:
PCIe Power Management Overview n PC
Page 113 and 114:
Link Training and Status State Mach
Page 115 and 116:
Normal Operations n Once the Link i
Page 117 and 118:
Sequence Number - Transmit Requesto
Page 119 and 120:
Section 4 PCIe Physical Layer Copyr
Page 121 and 122:
Physical Layer Overview n The PCIe
Page 123 and 124:
Physical Layer Packets Packet deliv
Page 125 and 126:
Scrambling n Scrambling is a techni
Page 127 and 128:
8B/10B Signal Encoding Data Byte Na
Page 129 and 130:
Special Symbols n Framing and Link
Page 131 and 132:
Other Ordered Sets n n Electrical I
Page 133 and 134:
Link Training Ordered Sets n Using
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PCIe Devices - PLX Technology

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