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Intel Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver, MPCHC5525 - page 18

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18 Intel® NetStructure™ MPCHC5525 System Master Processor Board IPMI Reference Dri ver User’s Guide

IBMU Functionality

1. The system management software residing on the CPU board in chassis2 sends an ICMB

message to the BMC2. This ICMB mes sage contains the ICMB head er information and the

IPMI command “M aster Write-Read I2C” with which the fan sensor data is requested.

2. The BMC2 sends the ICMB message to the BMC1 via ICMB.

3. BMC1 extracts the IPMI command “Master Write-Read I2C” from the ICMB message.

4. BMC1 reads the sensor temperature on the fan module via the command “Master Write-Read

I2C” and sensor registers.

5. BMC1 adds an ICMB header to the sensor result and sends the ICMB message via ICMB and

BMC2 to the system management software.

Figure 11. Example for Nonintelligent Devi ce via ICMB

Contents

Main Page Contents Figures Tables Page Page Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 7 Using This Guid e Using This Guide 1 1.1 Terms and Definitions Table 1. Terms and Definitions 8Intel Using This Guide 1.2 Other Sources of Information Table 2. Reference Documents Table 1. Terms and Definitions IBMU Functionality 2 2.1 Introduction 2.1.1 Purpose of IPMI 2.1.3 Where Is IPMI-Relevant Information Stored? 2.1.4 Basic Communication Principles 2.1.5 Requirements Page 2.1.6 Available D rivers 2.2 How Does Communication Work? 2.2.1 Communication Within a Chassis 2.2.1.1 Devices with IPMI Controller 2.2.1.2 Nonintelligent Devices 2.2.1.3 On-Board Temperature Sensor 2.2.2 Communication between Chassis Page Page Preparing Software for IPMI Usage 3 3.1 Action Plan 3.2 Notes on Writing Your Own IPMI Driver 3.3 Sensor Data Records 3.3.1 Obtaining SDR Settings 3.4 Notes on Writing System Managem ent Software With your management sof tw a re and For c e -sp e cif ic O E M IP MI co mm ands, you: 3.4.2 Checking CP U Boar d Si gn als 3.4.2.4 POST Code 3.4.3 Monitoring the IBMU 3.4.3.1 Self Test 3.4.3.2 IPMI Controller Watchdog Supported IPMI Commands and BMC/PM Addresses 4 4.1 Standard IPMI Commands 4.2 Global IPM I Co m mands 4.2.1 System Interface Commands 4.2.3 SEL Commands 4.2.4 SDR Commands 4.2.5 FRU Inventory Device Commands Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 25 4.2.6 Sensor Device Commands All commands can be used in every operation mode. 4.2.7 ICMB Bridge Commands Table 7. Implemented Optional Sensor Device Commands Table 8. Implemented Optional ICMB Bridge Commands (Sheet 1 of 2) 4.3 Force-Specific Commands 4.3.1 BMC/PMChangeRole 4.3.1.2 Response Data 4.3.1.1 Request Data 4.3.2 FlashFileSystemClear 4.3.2.1 Request Data 4.3.2.2 Response Data 4.3.3 GetGeographicalAddress 4.3.3.1 Request Data 4.3.3.2 Response Data 4.4 BMC and PM Addresses Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 29 Page Customer Support 5