SATA科普教程介绍

古猫著/471.0OOB(OutofBand)信号解析ApplicationLayer:TransportLayer:对FIS的组成和解开.LinkLayer:PhysicalLayer:上电时序,支持SATA电源管理选项,OOB(Out-of-Band)信号的产生与检测.信号的产生与检测,这就是我们今天的主角~初始化(initialization),传输速率的协商与对接(Speednegotiation),重置(Reset),从省电状态(Slumer/Partial)的唤醒,eaCOMREST472.0LinkLayerTransportLayer路层(LinkLayer)以及物理层(PhysicalLayer),Frameflowcontrole47Aprimitive量控制，ayerCRChysicallayerCbb12.加扰(Scramble)/解扰(Descramble)3.CRC(CyclicRedundancyCheck)循环冗余校验码Dword(32-bit)为单位，如果资料的内容不是Dword的整数倍，需要在资料包的p程来说明基元的作用。首先主机、设备都处于空闲状态(SYNC)。(12)主机进入空闲状态，发送同步信号SYNC；(13)设备进入空闲状态，发送同步信号SYNC；3.0TransportLayer管理和流量控制(FlowControl)ApplicationLayer。析一下.1.FIS(FrameInformationStructure)TypeFISIDiptionommandtodrivepondsstatustohostctivateActivateaDMAdatatransferASetupaDMAdatatransferSetupPIOtransferIOProgrammedInputOutputapackethpondsacommandcompletiommandTiltInSelfTest，rsAhtivateAhDevicetoHost7directionalpFhDevicetoHostAFIS7irectionalStivatehBidirectionalrFISRxBuffer(如下图)。y72.FlowControlesnsOverRuns(ReceptioninProgress)给发送端(如下图)。77，呜呜~"。773.ErrorReportingr7在FIS传输过程中发生错误，Device向Host发送Primitive基元“R_ERR”。r冻结(Freeze)。这个时候就说明了错误的严重性很高，无法修复，需要做重新发送(Retry)。表明错误是短暂并且不影响SATA系统运行，比如CRCister77tatusSStatusRegisterrrorSErrorRegister774.0CommandLayerrshadowcommandblockcommandregisterblock；shadowcontrolblockcontrolregisterblock；7PU是将软件)的信息获取到，等下个硬件周期才会执行。ommandNoImplemented72.Non-DataCommands73.PIOData-InCommands4.PIOData-OutCommands75.DMAData-In(Read)Commands6.DMAData-Out(Write)Commands77.DMAData-In(Read)QueuedCommands8.DMAData-Out(Write)QueuedCommands79.COMRSETSequence10.HostSoftwareResetSequence75.0LinkPowerManagementlerHIPM=HostInitiatedLinkPowerManagementDIPM=DeviceInitiatedLinkPowerManagementlACK7alKosignalOBe/47/476.0NCQ原生指令序列Race-FreeStatusReturn:无竞争状态返回机制，允许任何指令任何时间regationDMA一个中断(Interrupt)，造成延迟。所以，SATAspec提供中断聚集机制。，这些命令完成所引起的中断就可以聚集在ReadFPDMAQueued;WriteFP