文件名称：pcie2.0规范
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更新时间：2021-12-17 05:38:03
pcie2.0规范
OBJECTIVE OF THE SPECIFICATION.................................................................................... 21 DOCUMENT ORGANIZATION ................................................................................................ 21 DOCUMENTATION CONVENTIONS...................................................................................... 22 TERMS AND ACRONYMS........................................................................................................ 23 REFERENCE DOCUMENTS...................................................................................................... 29 1. INTRODUCTION ................................................................................................................ 31 1.1. A THIRD GENERATION I/O INTERCONNECT ................................................................... 31 1.2. PCI EXPRESS LINK......................................................................................................... 33 1.3. PCI EXPRESS FABRIC TOPOLOGY .................................................................................. 35 1.3.1. Root Complex........................................................................................................ 35 1.3.2. Endpoints .............................................................................................................. 36 1.3.3. Switch.................................................................................................................... 39 1.3.4. Root Complex Event Collector.............................................................................. 40 1.3.5. PCI Express to PCI/PCI-X Bridge........................................................................ 40 1.4. PCI EXPRESS FABRIC TOPOLOGY CONFIGURATION....................................................... 40 1.5. PCI EXPRESS LAYERING OVERVIEW.............................................................................. 41 1.5.1. Transaction Layer................................................................................................. 42 1.5.2. Data Link Layer .................................................................................................... 42 1.5.3. Physical Layer ...................................................................................................... 43 1.5.4. Layer Functions and Services............................................................................... 43 2. TRANSACTION LAYER SPECIFICATION ..................................................................... 47 2.1. TRANSACTION LAYER OVERVIEW.................................................................................. 47 2.1.1. Address Spaces, Transaction Types, and Usage................................................... 48 2.1.2. Packet Format Overview ...................................................................................... 50 2.2. TRANSACTION LAYER PROTOCOL - PACKET DEFINITION............................................... 51 2.2.1. Common Packet Header Fields ............................................................................ 51 2.2.2. TLPs with Data Payloads - Rules ......................................................................... 54 2.2.3. TLP Digest Rules .................................................................................................. 56 2.2.4. Routing and Addressing Rules .............................................................................. 56 2.2.5. First/Last DW Byte Enables Rules........................................................................ 59 2.2.6. Transaction Descriptor......................................................................................... 61 2.2.7. Memory, I/O, and Configuration Request Rules................................................... 66 2.2.8. Message Request Rules......................................................................................... 69 2.2.9. Completion Rules.................................................................................................. 80 2.3. HANDLING OF RECEIVED TLPS...................................................................................... 82 2.3.1. Request Handling Rules........................................................................................ 85
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PCI_Express_Base_Rev_2.0_20Dec06a.pdf