Freescale Semiconductor SEC2SWUG Device Driver Components, Device Driver Structure, IsrMsgQId

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Device Driver Components

 

Table 1. Acronyms and Abbreviations (continued)

 

 

 

Term

Meaning

 

 

 

 

RDK

Restore decrypt key—An AESA option to re-use an existing expanded AES decryption key.

 

 

 

 

RNGA

Random number generator accelerator

 

 

 

 

SDES

Single DES

 

 

 

 

TEA

Transfer error acknowledge

 

 

 

 

TDES

Triple DES

 

 

 

 

VxWorks

Operating systems provided by VxWorks Company.

 

 

 

 

2 Device Driver Components

This section is provided to help users understand the internal structure of the device driver.

2.1 Device Driver Structure

Internally, the driver is structured in four basic components:

•Driver Initialization and Setup

•Application Request Processing

•Interrupt Service Routine

•Deferred Service Routine

While executing a request, the driver runs in system/kernel state for all components with the exception of the ISR, which runs in the operating system's standard interrupt processing context.

End-User Application

Driver

Prepare Request InvokedDriver Code

(Non-Blocking)

ioctl (

)

• Tracks Requests

•Queue Request when Channels are Unavailable

 

 

Callback Function

 

• Prepare Descriptors

 

 

 

 

 

 

Driver

 

 

 

 

 

 

 

 

 

• Start the descriptor’s execution in a channel

 

 

 

Returns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation

 

 

 

 

 

 

 

 

 

 

 

 

ProcessingComplete Task

 

 

 

 

 

Starts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sleeps on Queue

 

 

 

 

SEC2.x Execution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Completes the User Request

 

 

IsrMsgQId

 

 

Operation Completed/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interrupt Generated

 

 

Execute Callback Function*

 

 

 

 

 

 

 

 

 

 

 

 

 

ISR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Writing a Message to the Queue Wakes

 

 

 

 

 

the ProcessingComplete Task

*If no callback function is defined, no callback takes place.

SEC 2.0 Reference Device Driver User’s Guide, Rev. 0

Freescale Semiconductor

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

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Contents Freescale Semiconductor OverviewSEC 2.0 Reference Device Driver User’s Guide, Rev Acronyms and AbbreviationsOverview Term MeaningEnd-User Application Device Driver ComponentsDevice Driver Structure Device Driver ComponentsProcess Request Routine Interrupt Service RoutineDriver Initialization Routine Request Dispatch RoutineUser Interface Deferred Service RoutineUser Interface Application Interface= Dpdaesacbcencryptcrypt Error HandlingSecond and Third Arguments in the ioctl Function Global Definitions1 I/O Control Codes Channel DefinitionsChannel Defines Callback Error Status Return CodeOperation ID opId Masks Return CodesSEC2TEAERROR SEC2ADDRESSPROBLEMSEC2CHAERROR SEC2PARITYSYSTEMERRORDefine Description SEC2CANCELLEDREQUESTMiscellaneous Request Structures SEC2INVALIDADDRESSStatusreq Process Request StructuresScatter-Gather Buffer Management NotifyonerrorDirect Scatter-Gather Usage Example Rngreq Individual Request Type DescriptionsRandom Number Requests DES RequestsDescbccryptreq Valid Descriptors opId ARC4 RequestsDescryptreq 1 ARC4LOADCTXCRYPTREQ2 ARC4LOADKEYCRYPTUNLOADCTXREQ ARC4LOADCTXCRYPTREQ Valid Descriptor opIdARC4LOADKEYCRYPTUNLOADCTXREQ Valid Descriptor opId Hash Requests HashreqHashreq Valid Descriptors 0x4400 opId Hmac Requests HmacpadreqHashreq Valid Descriptors 0x4500 opId AES Requests AesacryptreqHmacpadreq Valid Descriptors opId Modexpreq Valid Descriptor opId Integer Public Key RequestsModexpreq Aesacryptreq Valid Descriptors opIdDpdmmssrsaexp ModssexpreqMODR2MODNREQ Modssexpreq Valid Descriptor opId0x5300 Modrrmodpreq5 MOD2OPREQ Modrrmodpreq Valid Descriptor opIdMOD2OPREQ Valid Descriptors opId Value Function Description ECC Public Key Requests EccpointreqMOD2OPREQ Valid Descriptors opId Eccpointreq Valid Descriptors opId 2 ECC2OPREQDpdecspkbuildulctx EccspkbuildreqECC2OPREQ Valid Descriptors opId Eccspkbuildreq Valid Descriptor opIdEccptadddblreq Valid Descriptor opId IPSec RequestsEccptadddblreq IpseccbcreqIpseccbcreq Valid Descriptors opId Descriptors Ipsececbreq Valid Descriptors opId IpsececbreqIpsecaescbcreq Valid Descriptors opId IpsecaescbcreqIpsecaesecbreq Ipsecaesecbreq Valid Descriptors opId IpsecespreqIpsecespreq Valid Descriptors opId DPDIPSECESPINTDESCBCDCRPTMD5PAD DpdipsecespinsdescbcdcrptshapadDPDIPSECESPOUTTDESCBCCRPTMD5PAD DpdipsecespouttdescbccrptshapadSrtpreq 10 802.11 Protocol RequestsSrtp Protocol Requests CcmpreqSample Code DES SampleSrtpreq Valid Descriptors opId Ipsec Sample PRELIMINARY-SUBJECT to Change Without Notice Installation Linux EnvironmentOperation VxWorks Environment Driver Operation in User ModeVxWorks Environment Driver Module License MacroVxWorks Interface Module Variables PortingBuilding the Interface Modules BSP IntegrationInterrupt Service Routine Header FilesSource Files Conditional Compilation Debug MessagingDistribution Archive How to Reach Us

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