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1-1.2 Hardware Platform Management for ATCA and MTCA Platforms.pdf

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    Hardware Platform Management for AdvancedTCA and MicroTCA Platforms xTCA for Physics Workshop March 22-23, 2010 2010 IEEE Real-Time Conference, Lisbon Presented by Pete Hawkins www.pt.com 1
    Agenda IPMI Overview IPMI Hardware Command and Data Structure Formats AdvancedTCA Platform Management Architecture MicroTCA Platform Management Architecture PICMG Extensions Design Summary Common Pitfalls Development Tools References www.pt.com 2
    IPMI Overview Intelligent Platform Management Interface Created by Intel, HP, NEC, and Dell for the Enterprise Server Market Standardized Software Interface to Hardware Health Sensors and Inventory Information – Hardware Abstraction via Standardized Request/Response Protocol Large Set of Specifications Can Seem Overwhelming, but… – Fairly Simple Hardware Most of the Work is the Software – Most Features are Optional The Basic Protocol is Required www.pt.com 3
    Basic IPMI Hardware Baseboard Management Controller (BMC) Sensors – GPIO, A2D, I2C, SMBus System Event Log (SEL) – Typically a SEEPROM Field Replaceable Unit (FRU) Inventory Information – Typically a SEEPROM External Interfaces www.pt.com 4 µCSensorsSELLAN I/FSerialPayload I/FFRU Info
    Complex IPMI Subsystem BMC is Central Controller – SEL – External Interfaces Peripheral Management Controllers (PMCs) – Reduced Features Compared to BMC – Supports Abstraction by FRU Connected via IPMB – Intelligent Platform Management Bus – I2C Physical Layer – IPMI Defined Protocol www.pt.com 5 IPMBBMCµCSELLAN I/FSerialPayload I/FFRU InfoPMCµCPayload I/FFRU InfoPMCµCPayload I/FFRU Info
    IPMI Messaging Request / Response Protocol – Retries on Request, but Not on Response Multiple Channel Types – Between Controllers – IPMB – External – LAN, Serial, Modem – Payload KCS – Keyboard Controller Style SMIC - Server Management Interface Chip BT – Block Transfer Serial – Between Chassis – ICMB (Not Used by PICMG Specifications) Each Channel Type Has a Message Wrapper – Addressing (Optional) – Checksums (Optional) – Network Function (Required) Command Grouping Even Values Indicate Request Odd Values Indicate Response – Command Code (Required) Specific to the Network Function Data is Specific to Command, but Common to All Channel Types www.pt.com 6
    IPMB Messaging Example • Net Fn •Even to Odd • Swap •Addresses •LUNs Request Byte Description 1 2 3 4 5 6 Rs Addr Net Fn (Even) / Rs LUN Checksum 1 Rq Addr Rq Seq / Rq LUN Command 7 – (7+n-1) Command Data (0 or more bytes) 7+n Checksum 2 •Completion Code •Response Data •Update Checksums Response Byte Description 1 2 3 4 5 6 7 Rq Addr Net Fn (Odd) / Rq LUN Checksum 1 Rs Addr Rq Seq / Rs LUN Command Completion Code 8 – (8+n-1) Response Data (0 or more bytes) 8+n Checksum 2 www.pt.com 7
    Example Commands Command Net Fn Cmd Code IPM Device “Global” Commands Get Device ID Cold Reset Warm Reset Event Commands APP APP APP 01h 02h 03h Set Event Receiver Sensor / Event 00h Platform Event Sensor / Event 03h Sensor Device Commands Get Device SDR Info Sensor / Event 20h Get Device SDR Sensor / Event 21h Get Sensor Reading Sensor / Event 2Dh FRU Device Commands Get FRU Inventory Area Info Storage Read FRU Data Write FRU Data Storage Storage 10h 11h 12h www.pt.com 8
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