IBM Z10 BC manual Direct Memory Access DMA, Hardware data router

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Direct Memory Access (DMA)

OSA-Express3 and the operating systems share a common storage area for memory-to-memory communi- cation, reducing system overhead and improving perfor- mance. There are no read or write channel programs for data exchange. For write processing, no I/O interrupts have to be handled. For read processing, the number of I/O interrupts is minimized.

Hardware data router

With OSA-Express3, much of what was previously done in

firmware (packet construction, inspection, and routing) is now performed in hardware. This allows packets to fl ow directly from host memory to the LAN without fi rmware intervention.

With the hardware data router, the “store and forward” technique is no longer used, which enables true direct memory access, a direct host memory-to-LAN fl ow, return- ing CPU cycles for application use.

This avoids a “hop” and is designed to reduce latency and to increase throughput for standard frames (1492 byte) and jumbo frames (8992 byte).

IBM Communication Controller for Linux (CCL)

CCL is designed to help eliminate hardware dependen- cies, such as 3745/3746 Communication Controllers, ESCON channels, and Token Ring LANs, by providing a software solution that allows the Network Control Program (NCP) to be run in Linux on System z freeing up valuable data center fl oor space.

CCL helps preserve mission critical SNA functions, such as SNI, and z/OS applications workloads which depend upon these functions, allowing you to collapse SNA inside a z10 BC while exploiting and leveraging IP.

The OSA-Express3 and OSA-Express2 GbE and 1000BASE-T Ethernet features provide support for CCL. This support is designed to require no changes to operat- ing systems (does require a PTF to support CHPID type OSN) and also allows TPF to exploit CCL. Supported by z/VM for Linux and z/TPF guest environments.

OSA-Express3 and OSA-Express2 OSN (OSA for NCP)

OSA-Express for Network Control Program (NCP), Channel path identifi er (CHPID) type OSN, is now available for use with the OSA-Express3 GbE features as well as the OSA- Express3 1000BASE-T Ethernet features.

OSA-Express for NCP, supporting the channel data link control (CDLC) protocol, provides connectivity between System z operating systems and IBM Communication Con- troller for Linux (CCL). CCL allows you to keep your busi- ness data and applications on the mainframe operating systems while moving NCP functions to Linux on System z.

CCL provides a foundation to help enterprises simplify their network infrastructure while supporting traditional Systems Network Architecture (SNA) functions such as SNA Network Interconnect (SNI).

Communication Controller for Linux on System z (Program Number 5724-J38) is the solution for companies that want to help improve network availability by replacing

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Contents IBM System z10 Business Class z10 BC Reference Guide Table of Contents IBM System z10 Business Class z10 BC Overview Think Big, Virtually LimitlessMore Solutions, More Affordable Special workloads, Specialty engines, affordable technologyNew Face Of System z Architecture operating system support ArchitectureZ10 BC Architecture Page Commitment to system integrity VSE TPFLinux on System z Operating System ESA/390Z10 BC Page Page Z10 BC Design and Technology Memory Dimm sizes 2 GB and 4 GB Z10 BC ModelZ10 BC capacity identifiers Z10 BC model upgrades Z10 BC Model Capacity IDsCPU Measurement Facility Z10 BC PerformanceLarge System Performance Reference Z10 BC I/O Subsystem System I/O Configuration AnalyzerZ10 BC Channels and I/O Connectivity Modes of Operation Concurrent UpdateSupport of Spanned Channels and Logical Partitions Ficon Support for Cascaded Directors FCP ChannelsFCP increased performance for small block sizes Scsi IPL now a base functionFCP Full fabric connectivity High Performance Ficon improvement in performancePreplanning and setup of SAN for a System z10 environment Platform and name server registration in Ficon channelDistance Ficon Express enhancements for Storage Area NetworksNPort ID Virtualization Program Directed re-IPLServiceability Enhancements Feature Infrastructure Ports perFicon Link Incident Reporting OSA-Express3 the newest family of LAN adaptersOSA-Express3 Ethernet features Summary of benefits OSA-Express2 availabilityFeatures Purpose/TrafficType OSA-Express3 10 Gigabit Ethernet LROSA-Express3-2P Gigabit Ethernet SX Four-port exploitation on OSA-Express3 GbE SX and LXOSA-Express3 1000BASE-T Ethernet OSA-Express3-2P 1000BASE-T EthernetNetwork Traffic Analyzer Link aggregation for z/VM in Layer 2 mode Dynamic LAN idle for z/OSLayer 2 transport mode When would it be used? OSA Layer 3 Virtual MAC for z/OSDirect Memory Access DMA Hardware data routerIBM Communication Controller for Linux CCL OSA-Express3 and OSA-Express2 OSN OSA for NCPOSA/SF Virtual MAC and Vlan id Display Capability OSA Integrated Console ControllerRemove L2/L3 LPAR-to-LPAR Restriction HiperSockets HiperSockets Enhancement for zIIP Exploitation CP Assist for Cryptographic Function Cpacf Security CryptographyCan Do IT securely Crypto Express2-1P Enhancements to CP Assist for Cryptographic Func Tion CpacfConfigurable Crypto Express2 Support for ISO Support for RSA keys up to 4096 bitsDynamically add crypto to a logical partition Secure Key AESSupport for 13- thru 19-digit Personal Account Numbers TKE 5.3 workstationEnhancement with TKE 5.3 LIC Smart Card ReaderTKE additional smart cards new feature System z10 BC cryptographic migrationRemote Loading of Initial ATM Keys Remote Key Loading BenefitsOn Demand Capabilities Capacity on Demand Temporary CapacityAmendment for CBU Tests Capacity Provisioning OS Capacity provisioning allows you to set up rules System z9 System z10Reliability, Availability, and Serviceability RAS RAS Design FocusEnhanced Driver Maintenance Availability FunctionsHardware System Area HSA Redundant I/O InterconnectDynamic Oscillator Switchover Concurrent Memory UpgradeService Enhancements Transparent SparingPower Monitoring Power Estimation ToolEnvironmental Enhancements IBM Systems Director Active Energy ManagerCoupling Facility Control Code Cfcc Level Improved service time with Coupling Facility DuplexParallel Sysplex Cluster Technology Coupling Facility Configuration Alternatives System-Managed CF Structure DuplexingParallel Sysplex Coupling Connectivity Introducing long reach InfiniBand coupling linksCoupling Connectivity for Parallel Sysplex Z10 Coupling Link Options Time synchronization and time accuracy on z10 BCServer Time Protocol STP Server Time Protocol enhancementsPreview Improved STP System Management with Enhanced STP recovery when Internal Battery Feature Continuous Availability of NTP servers used as ExterInternal Battery Feature Recommendation Application Programming Interface API to automateHMC System Support Family Machine TypeInternet Protocol, Version 6 IPv6 HMC/SE Console MessengerEnhanced installation support for z/VM using the HMC HMC z/VM Tower System Management EnhancementsImplementation Services for Parallel Sysplex Fiber Quick Connect for Ficon LX Environments GdpsZ10 BC Physical Characteristics Z10 BC System PowerZ10 BC Highlights and Physical Dimensions Z9 BC Physical PlanningZ10 BC Configuration Detail Z10 BC Concurrent PU ConversionsZ10 BC Model Structure Z10 BC Minimum MaximumIBF Z10 BC IBF hold uptime Drawer DrawersCoupling Facility CF Level of Support Z890Statement of Direction Publications Following Redbook publications are available nowAvailable in the Library section of Resource Link Resource LinkZSO03021-USEN-02
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