Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon® Memory-Mapped (Avalon-MM) DMA Interface for PCI Express* Solutions User Guide

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ID 683425
Date 6/03/2021
Public
Document Table of Contents
Document Table of Contents x
1. Datasheet 2. Getting Started with the Avalon-MM DMA 3. Parameter Settings 4. Physical Layout 5. Registers 6. Error Handling 7. PCI Express Protocol Stack 8. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM DMA for PCI Express 9. Design Implementation A. Transaction Layer Packet (TLP) Header Formats B. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM DMA Interface for PCIe Solutions User Guide Archive C. Document Revision History
1. Datasheet x
1.1. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM DMA Interface for PCIe* Datasheet 1.2. Features 1.3. Comparison of Avalon-ST, Avalon-MM and Avalon-MM with DMA Interfaces 1.4. Release Information 1.5. Device Family Support 1.6. Design Examples 1.7. IP Core Verification 1.8. Resource Utilization 1.9. Recommended Speed Grades 1.10. Creating a Design for PCI Express
1.7. IP Core Verification x
1.7.1. Compatibility Testing Environment
2. Getting Started with the Avalon-MM DMA x
2.1. Understanding the Avalon-MM DMA Ports 2.2. Generating the Testbench 2.3. Simulating the Example Design in ModelSim* 2.4. Running a Gate-Level Simulation 2.5. Generating Synthesis Files 2.6. Compiling the Design 2.7. Creating a Quartus® Prime Project
2.2. Generating the Testbench x
2.2.1. Understanding the Simulation Generated Files 2.2.2. Understanding Simulation Log File Generation
3. Parameter Settings x
3.1. Parameters 3.2. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM Settings 3.3. Base Address Register (BAR) Settings 3.4. Device Identification Registers 3.5. PCI Express and PCI Capabilities Parameters 3.6. Configuration, Debug, and Extension Options 3.7. PHY Characteristics 3.8. Example Designs
3.1. Parameters x
3.1.1. RX Buffer Allocation Selections Available by Interface Type
3.5. PCI Express and PCI Capabilities Parameters x
3.5.1. Device Capabilities 3.5.2. Error Reporting 3.5.3. Link Capabilities 3.5.4. MSI and MSI-X Capabilities 3.5.5. Slot Capabilities 3.5.6. Power Management 3.5.7. Vendor Specific Extended Capability (VSEC)
4. Physical Layout x
4.1. Hard IP Block Placement In Intel® Cyclone® 10 GX Devices 4.2. Hard IP Block Placement In Intel® Arria® 10 Devices 4.3. Channel and Pin Placement for the Gen1, Gen2, and Gen3 Data Rates 4.4. Channel Placement and fPLL and ATX PLL Usage for the Gen3 Data Rate 4.5. PCI Express Gen3 Bank Usage Restrictions
5. Registers x
5.1. Correspondence between Configuration Space Registers and the PCIe Specification 5.2. Type 0 Configuration Space Registers 5.3. Type 1 Configuration Space Registers 5.4. PCI Express Capability Structures 5.5. Intel-Defined VSEC Registers 5.6. Advanced Error Reporting Capability 5.7. DMA Descriptor Controller Registers 5.8. Control Register Access (CRA) Avalon-MM Slave Port
5.5. Intel-Defined VSEC Registers x
5.5.1. CvP Registers
5.6. Advanced Error Reporting Capability x
5.6.1. Uncorrectable Internal Error Mask Register 5.6.2. Uncorrectable Internal Error Status Register 5.6.3. Correctable Internal Error Mask Register 5.6.4. Correctable Internal Error Status Register
5.7. DMA Descriptor Controller Registers x
5.7.1. Read DMA Descriptor Controller Registers 5.7.2. Write DMA Descriptor Controller Registers 5.7.3. Read DMA and Write DMA Descriptor Format 5.7.4. Read DMA Example 5.7.5. Software Program for Simultaneous Read and Write DMA
6. Error Handling x
6.1. Physical Layer Errors 6.2. Data Link Layer Errors 6.3. Transaction Layer Errors 6.4. Error Reporting and Data Poisoning 6.5. Uncorrectable and Correctable Error Status Bits
7. PCI Express Protocol Stack x
7.1. Top-Level Interfaces 7.2. Data Link Layer 7.3. Physical Layer
7.1. Top-Level Interfaces x
7.1.1. Avalon-MM DMA Interface 7.1.2. Clocks and Reset 7.1.3. Interrupts 7.1.4. PIPE
8. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM DMA for PCI Express x
8.1. Understanding the Internal DMA Descriptor Controller 8.2. Understanding the External DMA Descriptor Controller
9. Design Implementation x
9.1. Making Pin Assignments to Assign I/O Standard to Serial Data Pins 9.2. Recommended Reset Sequence to Avoid Link Training Issues 9.3. SDC Timing Constraints 9.4. Warnings Encountered When Using Narrow Avalon-MM Interfaces
A. Transaction Layer Packet (TLP) Header Formats x
A.1. TLP Packet Formats without Data Payload A.2. TLP Packet Formats with Data Payload
C. Document Revision History x
C.1. Document Revision History for the Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon® Memory Mapped (Avalon-MM) DMA Interface for PCIe* Solutions User Guide
1. Datasheet
2. Getting Started with the Avalon-MM DMA
3. Parameter Settings
4. Physical Layout
5. Registers
6. Error Handling
7. PCI Express Protocol Stack
8. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM DMA for PCI Express
9. Design Implementation
A. Transaction Layer Packet (TLP) Header Formats
B. Intel® Arria® 10 or Intel® Cyclone® 10 GX Avalon-MM DMA Interface for PCIe Solutions User Guide Archive
C. Document Revision History

This configuration results from selecting both Enable Avalon-MM DMA and Instantiate internal descriptor controller in the component GUI.

The following figure shows the Avalon-MM DMA Bridge, implemented in soft logic. It interfaces to the Hard IP for PCIe through Avalon® -ST interfaces.

Note: In the following diagrams and text descriptions, the terms Read and Write are from the system memory perspective. Thus, a Read transaction reads data from the system memory and writes it to the local memory in Avalon® -MM address space. A Write transaction writes the data that was read from the local memory in Avalon® -MM address space to the system memory.
Avalon-MM DMA Bridge Block Diagram with Optional Internal Descriptor Controller
The steps for doing a DMA Write are:
  1. The CPU writes registers in the Descriptor Controller to start the DMA.
  2. The Descriptor Controller instructs the Read DMA Module to fetch the descriptor table.
  3. The Read DMA Module forwards the descriptor table to the Descriptor Controller.
  4. The Descriptor Controller instructs the Write DMA Module to transfer data.
  5. The Write DMA Module transfers data from FPGA to system memory.
  6. The Write DMA Module notifies the Descriptor Controller of the completion of the data transfer using the done bit.
  7. The Descriptor Controller updates the status of the descriptor table in system memory.
  8. The Descriptor Controller sends an MSI interrupt to the host.
The steps for doing a DMA Read are:
  1. The CPU writes registers in the Descriptor Controller to start the DMA.
  2. The Descriptor Controller instructs the Read DMA Module to fetch the descriptor table.
  3. The Read DMA Module forwards the descriptor table to the Descriptor Controller.
  4. The Descriptor Controller instructs the Read DMA Module to transfer data.
  5. The Read DMA Module transfers data from system memory to FPGA.
  6. The Read DMA Module notifies the Descriptor Controller of the completion of the data transfer using the done bit.
  7. The Descriptor Controller updates the status of the descriptor table in system memory.
  8. The Descriptor Controller sends an MSI interrupt to the host.

When the optional Descriptor Controller is included in the bridge, the Avalon-MM bridge includes the following Avalon® interfaces to implement the DMA functionality:

  • PCIe Read DMA Data Master (rd_dma): This is a 256-bit wide write only Avalon-MM master interface which supports bursts of up to 16 cycles with the rd_dma* prefix. The Read Data Mover uses this interface to write at high throughput the blocks of data that it has read from the PCIe* system memory space. This interface writes descriptors to the Read and Write Descriptor table slaves and to any other Avalon® -MM connected slaves interfaces.
  • PCIe Write DMA Data Master (wr_dma): This read-only interface transfers blocks of data from the Avalon-MM domain to the PCIe system memory space at high throughput. It drives read transactions on its bursting Avalon-MM master interface. It also creates PCIe Memory Write (MWr) TLPs with data payload from Avalon® -MM reads. It forwards the MWr TLPs to the Hard IP for transmission on the link. The Write Data Mover module decomposes the transfers into the required number of Avalon-MM burst read transactions and PCIe MWr TLPs. This is a bursting, 256-bit Avalon-MM interface with the wr_dma prefix.
  • PCIe Read Descriptor Table Slave (rd_dts): This is a 256-bit Avalon-MM slave interface that supports write bursts of up to 16 cycles. The PCIe Read DMA Data Master writes descriptors to this table. This connection is made outside the DMA bridge because the Read Data Mover also typically connects to other Avalon-MM slaves. The prefix for this interface is rd_dts.
  • PCIe Write Descriptor Table Slave (wr_dts): This is a 256-bit Avalon-MM slave interface that supports write bursts of up to 16 cycles. The PCIe Read DMA Data Master writes descriptors to this table. The PCIe Read DMA Data Master must connect to this interface outside the DMA bridge because the bursting master interface may also need to be connected to the destination of the PCIe Read Data Mover. The prefix for this interface is wr_dts.
  • Descriptor Controller Master (DCM): This is a 32-bit, non-bursting Avalon-MM master interface with write-only capability. It controls the non-bursting Avalon-MM slave that transmits single DWORD DMA status information to the host. The prefixes for this interface are wr_dcm and rd_dcm.
  • Descriptor Controller Slave (DCS): This is a 32-bit, non-bursting Avalon-MM slave interface with read and write access. The host accesses this interface through the BAR0 Non-Bursting Avalon-MM Master, to program the Descriptor Controller.
    Note: This is not a top-level interface of the Avalon-MM Bridge. Because it connects to BAR0, you cannot use BAR0 to access any other Avalon-MM slave interface.
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