ALTERA PCI EXPRESS CHAINING DMA DRIVER

This differential, serial interface is the physical link between a Root Port and an Endpoint. This field is read by system software to determine the number of requested MSI messages. Equalization, Phase 1 After the device uses all of its initial credits, link bandwidth is limited by how fast it receives credit updates. Specifies the maximum payload size supported. Message Request with Data MsgD. Maximum of 2 us.

Uploader:	Jugal
Date Added:	27 May 2011
File Size:	52.82 Mb
Operating Systems:	Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads:	26094
Price:	Free* [*Free Regsitration Required]

If this slot has no power controller, this bit should be hardwired to 0, and the Power Controller Present bit bit[1] in the Slot capability register parameter is set to 0.

AN 855: PCI Express High Performance Reference Design for Intel Cyclone 10 GX

Related information All Development Kits. The directory structure used for the Arria V, Cyclone V, and Stratix V reference design differs from the earlier device families. Select this option for variations where application logic generates many read requests and only infrequently receives single requests from the PCIe link. The 6 bits of this vector correspond to the following 6 types of credit types: Includes testbench subdirectories for the Aldec, Cadence, Synopsys, and Mentor simulation tools with the required libraries and simulation scripts.

Each descriptor consists of four dwords. However, this design example does not generate all the files necessary to download the design example to hardware. A requester first sends a memory read request.

BAR 4 Bit 5: No Application Layer intervention is required. This parameter configures the Expresx Layer for the maximum number to track. The software GUI has the following control fields: On the Generate menu, select Generate Testbench System.

A non-aligned read request may experience a further throughput reduction.

Consequently, the throughput reported by the software application is less than the actual throughput. Header and data credits track available buffer space. Prefetching memory is advantageous when the requestor may require more data from the same region than was originally requested.

This bus includes the following bits:. Records the following PME status information: Specifies the number of functions that share the same link. The index increments every 8 coreclkout cycles. This Endpoint does not support the L0s or L1 states.

The chaning requests are limited by the number of header tags and the maximum read request size. Transfer length —Specifies the transfer length in bytes Sequence —Controls the sequence for data transfer or addressing Number of iterations chaiining the number of iterations for the data transfer Board —Specifies the development board for the software application Continuous loop —When this option is turned on, the application performs the transfer continuously.

The following table describes the signals that comprise the completion side band signals for the Avalon-ST interface.

Arria V Avalon-ST Interface for PCIe Solutions User Guide

Enable configuration via the PCIe link. Indicates a corrected error in the RX buffer. This signal stalls only non-posted TLPs. Debug signals should not be used to drive logic custom logic.

Equalization, Phase 2 You can leave the default settings for all other items. The Number of tags supported parameter specifies number of tags available. Indicates the number of qwords that are vhaining during cycles that contain the end of a packet. You can do this by waiting for the core to respond with a completion on the Avalon-ST RX port before issuing the next Configuration Type 0 transaction.