PCIe Devices - PLX Technology

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n n Data Link Layer Services <strong>PCIe</strong> defines the following DLLP types relating to Link services l l l l Ack/Nak of DLLPs received from the Physical Layer Initialization and Flow Control Update Power Management (PM) Vendor Specific Services provided to Transaction Layer l l Receive TLP from Transaction Layer – Pre-pending a sequence number to the TLP – Calculating and adding a 32 bit Link CRC (LCRC) to the TLP • Sending to Physical Layer Validates received packets sent to Transaction Layer – Ack/Nak as appropriate – Error log/generation as appropriate Copyright by Dashcourses, Inc. 2009 3-108
Transaction Layer Buffer Space and Credits n Credits reported by the Data Link Layer indicate buffer space available for receiving at the other end of the link Device A Device B Transaction Layer Transaction Layer PH PD Data Link Layer Data Link Layer 1 Flow Control credit received here 2. Indicate buffer space available here Physical Layer Logical Sub-block Physical Sub-block Physical Layer Logical Sub-block Physical Sub-block Copyright by Dashcourses, Inc. 2009 3-109
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 and 40:
PCI/PCI-X Arbitration Example n n F
Page 41 and 42:
PCIe Processing and Priorities n PC
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
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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: Basic DLLP Header Fields n All Data
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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