PEX8614-BA50BC G

Version 1.2 2009 Features ƒ PEX 8614 General Features o 12-lane PCI Express switch - Integrated 5.0 GT/s SerDes o Up to 12 configurable ports o 19 x 19mm2, 324-ball HSBGA o Typical Power: 1.74 Watts ƒ PEX 8614 Key Features o Standards Compliant - PCI Express Base Specification r2.0 (Backwards compatible with PCIe r1.0a/1.1) - PCI Power Management Spec r1.2 - Microsoft Vista Compliant - Supports Access Control Services - Dynamic link-width control o High Performance - Non-blocking internal architecture - Full line rate on all ports - Cut-Thru latency: 140ns - 2KB max payload size - Read Pacing (intelligent bandwidth allocation) - Dual Cast o Dual-Host & Fail-Over Support - Configurable Non-Transparent port (NTB) - Moveable upstream port - Crosslink port capability o Flexible Configuration - 12 flexible & configurable ports (x1 or x4) - Configurable with strapping pins, EEPROM, I2C, or Host software - Lane and polarity reversal o PCI Express Power Management - Link power management states: L0, L0s, L1, L2/L3 Ready, and L3 - Device states: D0 and D3hot o Spread Spectrum Clock Isolation - Dual clock domain o Quality of Service (QoS) - Two Virtual Channels (VC) per port - Eight Traffic Classes per port - Weighted Round-Robin Port & VC Arbitration o Reliability, Availability, Serviceability - All ports Hot-Plug capable thru I2C (Hot-Plug Controller on every port) - ECRC & Poison bit support - Data path protection - Memory (RAM) error correction - Advanced Error Reporting support - Port Status bits and GPIO available - Per port error diagnostics - Performance monitoring (per port payload & header counters) - JTAG AC/DC boundary scan - Fatal Error (FATAL_ERR#) output signal - INTA# output signal PEX 8614 Flexible & Versatile 12-lane 12-port PCI Express® Switch The ExpressLane™ PEX 8614 device offers PCI Express switching capability enabling users to add scalable high bandwidth non-blocking interconnection to a wide variety of applications including control planes, communications platforms, servers, storage systems and embedded systems. The PEX 8614 is well suited for fan-out, aggregation, peer-to-peer, and intelligent I/O module applications. Low Packet Latency & High Performance The PEX 8614 architecture supports packet cut-thru with a maximum latency of 140ns in x4 to x1 configuration. This, combined with large packet memory and non-blocking internal switch architecture, provides full line rate on all ports for lowlatency applications such as communications and servers. The low latency enables applications to achieve high throughput and performance. In addition to low latency, the device supports a max payload size of 2048 bytes, enabling the user to achieve even higher throughout. Data Integrity The PEX 8614 provides end-to-end CRC protection (ECRC) and Poison bit support to enable designs that require guaranteed error-free packets. PLX also supports data path parity and memory (RAM) error correction as packets pass through the switch. Dual-Host and Fail-Over Support The PEX 8614 supports full non-transparent bridging (NTB) functionality to allow implementation of multi-host systems and intelligent I/O modules in applications which require redundancy support such as communications, storage, and servers. Non-transparent bridges allow systems to isolate host memory domains by presenting the processor subsystem as an endpoint rather than another memory system. Base address registers are used to translate addresses, doorbell registers are used to send interrupts between the address domains, and scratchpad registers are accessible from both address domains to allow inter-processor communication. Interoperability The PEX 8614 is designed to be fully compliant with the PCI Express Base Specification r2.0 and is backwards compatible to PCI Express Base Specification r1.1 and r1.0a. Additionally each port supports auto-negotiation, lane reversal and polarity reversal. Furthermore, the PEX 8614 is designed for Microsoft Vista compliance. All PLX switches undergo thorough interoperability testing in PLX’s Interoperability Lab and compliance testing at the PCI-SIG plug-fest to ensure compatibility with PCI Express devices in the market. Device Operation Configuration Flexibility The PEX 8614 provides several ways to configure its operations. The device can be configured through strapping pins, I2C interface, CPU configuration cycles and/or an optional serial EEPROM. This allows for easy debug during the development phase and functional monitoring during the operation phase. Flexible Port Configurations The PEX 8614 flexible architecture supports a number of port configurations as required by the target applications as shown in figure 1 below. off, low, typical, and high. The SerDes block also supports loop-back modes and advanced reporting of error conditions, which enables efficient debug and management of the entire system. Port and Virtual Channel (VC) Arbitration The PEX 8614 switch supports hardware fixed and Weighted Round-Robin Ingress Port Arbitration. This allows fine tuning of Quality of Service and efficient use of packet buffers for better system performance. The PEX 8614 also supports WRR VC arbitration scheme between the two virtual channels. Applications Suitable for fan-out, control plane applications, embedded systems as well as intelligent I/O applications, PEX 8614 can be configured for a wide variety of form factors and applications. Figure 1. Port Configurations Hot-Plug for High Availability Hot-Plug capability allows users to replace hardware modules and perform maintenance without powering down the system. The PEX 8614 Hot-Plug capability feature makes it suitable for High Availability (HA) applications. If the PEX 8614 is used in an application where one or more of its downstream ports connect to PCI Express slots, each port’s Hot-Plug Controller can be used to manage the Hot-Plug event of its associated slot. Every port on the PEX 8614 is equipped with a Hot-Plug control/status register to support Hot-Plug capability through external logic via the I2C interface. Fan-Out The PEX 8614 switch, with its high port count and flexible configurations, allows user specific tuning to a variety of hostcentric as well as peer-to-peer applications. Control Processor The PEX 8614 supports Dual Cast, a feature which allows for the copying of data (e.g. packets) from one ingress port to two egress ports allowing for higher performance in storage, security, and mirroring applications. Read Pacing The Read Pacing feature allows users to throttle the amount of read requests being made by downstream devices. In the case where a downstream device requests several long reads backto-back, the Root Complex gets tied up in serving this downstream port. If this port has a narrow link and is therefore slow in receiving these read packets from the Root Complex, then other downstream ports may become starved – thus, impacting performance. The Read Pacing feature enhances performances by allowing for the adequate servicing of all downstream devices by intelligent handling of read requests. SerDes Power and Signal Management The PEX 8614 provides low power capability that is fully compliant with the PCI Express power management specification. In addition, the SerDes physical links can be turned off when unused for even lower power. The PEX 8614 supports software control of the SerDes outputs to allow optimization of power and signal strength in a system. The PLX SerDes implementation supports four levels of power – PEX 8311 FPGA PEX 8112 PCI PEX 8311 DSP PCIe PCIe Dual Cast Memory PEX 8614 FPGA PCIe PCIe Figure 2. Fan-in/out Usage Figure 2 shows a typical fan-out design, where the processor provides a PCI Express link that needs to be fanned into a larger number of smaller ports for a variety of I/O functions, each with different bandwidth requirements. In this example, the PEX 8614 would typically have a 1-lane upstream port, and as many as 11 downstream ports. The downstream ports provide x1 PCI Express connectivity to the endpoints. With its twelve ports, the PEX 8614 can provide fan-out connectivity to up to eleven PCI Express devices. The figure also shows how some of the ports can be bridged to provide PCI slots or Generic devices through the use of the PEX 8311 and PEX 8112 PCIe bridging devices. Control Plane Application The PEX 8614 is ideal for control planes in routers and other communications sub-systems to meet increased packet processing needs without compromising latency. Figure 3 shows a controller card with a PEX 8614 connecting the Control Processor to as many as eleven line cards each via an x1 connection. This usage model provides connectivity to multiple line cards giving the processor control over a large number of line cards in communication platforms. Intelligent Adapter Card The PEX 8614 supports the non-transparency feature. Figure 6 illustrates a host system using an intelligent adapter card. Figure 3. Control Plane Application Figure 6. Intelligent Adapter Usage Control Planes for Large Systems Two PEX 8614 devices can be used in applications where there is need for more than 11 line cards and the processor has 2 PCIe ports. An example of a control plane application with more than 11 line cards is shown in Figure 4. In this figure, the CPU on the adapter card is isolated from the host CPU. The PEX 8614 non-transparent port allows the two CPUs to be isolated but communicate with each other through various registers that are designed in the PEX 8614 for that purpose. The host CPU can dynamically re-assign both the upstream port and the non-transparent port of PEX 8614 allowing the system to be reconfigured. Active-Standby Failover Model The PEX 8614 supports applications requiring dual host, host failover applications through the non-transparency (NTB) feature. Figure 7 illustrates a dual host system with an active and standby processor configuration. Figure 4. Control Planes for Large Systems Embedded Control Planes The PEX 8614 is well suited for embedded control plane applications. An example of such application is a packet processing module, as shown in Figure 5. In this example, the FPGAs and ASICs implement an x1 PCI Express Interface. With its high port count, the PEX 8614 can provide connectivity to a high number of FPGAs and ASICs for a robust packet processing communications sub-system. The redundancy of the host and the fabric can be achieved through many possible configurations using NTB function of PEX 8614. In the configuration shown below Processor A is the primary active host of the PCI Express system. Processor B acts as the backup Host. In the case of a failure on Processor A, application software is instructed to migrate the PCI Express system to Processor B. Consequently, Processor B becomes the active host and Processor A can be replaced as the backup Host. LC #1 To Line Cards PEX 8614 NT Control Processor Figure 5. Packet Processing Module LC #10 Control Processor Memory Memory Processor A Processor B Figure 7. Active-Standby Host Mode Software Usage Model Interrupt Sources/Events From a system model viewpoint, each PCI Express port is a virtual PCI to PCI bridge device and has its own set of PCI Express configuration registers. It is through the upstream port that the BIOS or host can configure the other ports using standard PCI enumeration. The virtual PCI-to-PCI bridges within the PEX 8614 are compliant to the PCI and PCI Express system models. The Configuration Space Registers (CSRs) in a virtual primary/secondary PCI-to-PCI bridge are accessible by type 0 configuration cycles through the virtual primary bus interface (matching bus number, device number, and function number). The PEX 8614 supports the INTx interrupt message type (compatible with PCI 2.3 Interrupt signals) or Message Signaled Interrupts (MSI) when enabled. Interrupts/messages are generated by PEX 8614 for Hot-Plug events, doorbell interrupts, baseline error reporting, and advanced error reporting. Development Tools RDK PLX offers hardware and software tools to enable rapid customer design activity. These tools consist of a PEX 8614 Rapid Development Kit (RDK), hardware documentation, and a Software Development Kit (also available at www.plxtech.com/sdk). The PEX 8614RDK is a hardware module containing the PEX 8614 which plugs right into your system (Figure 8). The PEX 8614RDK hardware module can be installed in a motherboard, used as a riser card, or configured as a bench-top board. The PEX 8614RDK can be used to test and validate customer software. Additionally, it can be used as an evaluation vehicle for PEX 8614 features and benefits. SDK The SDK tool set includes: - Linux & Windows drivers - C/C++ Source code, Objects, libraries - User’s Guides & Application examples Windows/Linux Apps User Space PEX API Kernel Space Hardware PCIe Driver NT PnP Driver PCI Express Interface Figure 8. PEX 8614RDK Product Ordering Information PLX Technology, Inc. 870 W. Maude Ave. Sunnyvale, CA 94085 USA Tel: 1-800-759-3735 Tel: 1-408-774-9060 Fax: 1-408-774-2169 info@plxtech.com www.plxtech.com Part Number Description PEX8614-AA50BC PEX8614-AA50BC G 12 Lane, 12 Port PCIe Switch, 324-ball HSBGA 19x19mm2 pkg 12 Lane, 12 Port PCIe Switch, 324-ball HSBGA 19x19mm2 pkg, Pb-free PEX 8614 Rapid Development Kit – Base Board with x4 Upstream and Eight x1 Downstream PEX8614 Rapid Development Kit – Add-in Card with x4 Upstream and Two x1Downstream PEX 8614AA-BB4U1D RDK PEX 8614AA-AIC4U4D RDK Please visit the PLX Web site at http://www.plxtech.com or contact PLX sales at 408-774-9060 for sampling. © 2009 by PLX Technology, Inc. All rights reserved. PLX and the PLX logo are registered trademarks of PLX Technology, Inc. ExpressLane is a trademark of PLX Technology, Inc., which may be registered in some jurisdiction. All other product names that appear in this material are for identification purposes only and are acknowledged to be trademarks or registered trademarks of their respective companies. Information supplied by PLX is believed to be accurate and reliable, but PLX Technology, Inc. assumes no responsibility for any errors that may appear in this material. PLX Technology, Inc. reserves the right, without notice, to make changes in product design or specification. PEX 8614-SIL-PB-1.2 5/09