L-Tile and H-Tile Avalon® Memory-mapped+ Intel® FPGA IP for PCI Express* User Guide

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ID 683527
Date 9/13/2024
Public
Document Table of Contents
Document Table of Contents x
1. Introduction 2. Quick Start Guide 3. Block and Interface Descriptions 4. Parameters 5. Designing with the IP Core 6. Registers 7. Design Example and Testbench 8. Document Revision History for Intel® L- and H-tile Avalon® Memory-mapped+ IP for PCI Express* User Guide A. Avalon-MM IP Variants Comparison B. Root Port BFM C. BFM Procedures and Functions D. Troubleshooting and Observing the Link Status E. Root Port Enumeration
1. Introduction x
1.1. Features 1.2. Device Family Support 1.3. Release Information 1.4. Recommended Speed Grades 1.5. Resource Utilization 1.6. Transceiver Tiles 1.7. Channel Availability
2. Quick Start Guide x
2.1. Design Components 2.2. Directory Structure 2.3. Generating the Design Example 2.4. Simulating the Design Example 2.5. Compiling the Design Example and Programming the Device 2.6. Installing the Linux Kernel Driver 2.7. Running the Design Example Application 2.8. Ensuring the Design Example Meets Timing Requirements
3. Block and Interface Descriptions x
3.1. Block Descriptions 3.2. Interface Descriptions
3.1. Block Descriptions x
3.1.1. Tags
3.2. Interface Descriptions x
3.2.1. Avalon-MM Interface Summary 3.2.2. Clocks and Resets 3.2.3. System Interfaces
3.2.1. Avalon-MM Interface Summary x
3.2.1.1. Read Data Mover (RDDM) Interfaces 3.2.1.2. Write Data Mover (WRDM) Interfaces 3.2.1.3. Bursting Avalon-MM Slave (BAS) Interface 3.2.1.4. Bursting Avalon-MM Master (BAM) Interface
3.2.1.1. Read Data Mover (RDDM) Interfaces x
3.2.1.1.1. Read Data Mover Avalon-MM Write Master and Conduit 3.2.1.1.2. Read Data Mover Avalon-ST Descriptor Sinks 3.2.1.1.3. Read Data Mover Status Avalon-ST Source
3.2.1.2. Write Data Mover (WRDM) Interfaces x
3.2.1.2.1. Write Data Mover Avalon-MM Read Master and Conduit 3.2.1.2.2. Write Data Mover Avalon-ST Descriptor Sinks 3.2.1.2.3. Write Data Mover Status Avalon-ST Source
3.2.1.4. Bursting Avalon-MM Master (BAM) Interface x
3.2.1.4.1. PCIe Address to Avalon-MM Address Mapping
3.2.3. System Interfaces x
3.2.3.1. Serial Data Interface 3.2.3.2. PIPE Interface 3.2.3.3. Interrupts 3.2.3.4. Configuration Output Interface 3.2.3.5. Flush Requests 3.2.3.6. Reconfiguration 3.2.3.7. Hard IP Status and Link Training Conduit 3.2.3.8. Bus Master Enable (BME) Conduit 3.2.3.9. Test Conduit
3.2.3.3. Interrupts x
3.2.3.3.1. Interrupt Signals Available when the PCIe Hard IP is an Endpoint 3.2.3.3.2. MSI
3.2.3.6. Reconfiguration x
3.2.3.6.1. PCIe Hard IP Reconfiguration 3.2.3.6.2. Transceiver Reconfiguration 3.2.3.6.3. PLL Reconfiguration
4. Parameters x
4.1. Avalon-MM Settings 4.2. Base Address Registers 4.3. Device Identification Registers 4.4. PCI Express and PCI Capabilities Parameters 4.5. Configuration, Debug and Extension Options 4.6. PHY Characteristics 4.7. Example Designs
4.4. PCI Express and PCI Capabilities Parameters x
4.4.1. Device Capabilities 4.4.2. Link Capabilities 4.4.3. MSI and MSI-X Capabilities 4.4.4. Power Management 4.4.5. Vendor Specific Extended Capability (VSEC)
5. Designing with the IP Core x
5.1. Generation 5.2. Simulation 5.3. IP Core Generation Output ( Quartus® Prime Pro Edition) 5.4. Channel Layout and PLL Usage
6. Registers x
6.1. Configuration Space Registers
6.1. Configuration Space Registers x
6.1.1. Register Access Definitions 6.1.2. PCI Configuration Header Registers 6.1.3. PCI Express Capability Structures 6.1.4. Intel Defined VSEC Capability Header 6.1.5. Uncorrectable Internal Error Status Register 6.1.6. Uncorrectable Internal Error Mask Register 6.1.7. Correctable Internal Error Status Register 6.1.8. Correctable Internal Error Mask Register
6.1.4. Intel Defined VSEC Capability Header x
6.1.4.1. Intel Defined Vendor Specific Header 6.1.4.2. Intel Marker 6.1.4.3. JTAG Silicon ID 6.1.4.4. User Configurable Device and Board ID
7. Design Example and Testbench x
7.1. Overview of the Example Design 7.2. Overview of the Testbench
7.1. Overview of the Example Design x
7.1.1. Block Descriptions 7.1.2. Programming Model for the Example Design 7.1.3. DMA Operations Using the Example Design
7.1.1. Block Descriptions x
7.1.1.1. DMA Controller (DMA Example Design Only) 7.1.1.2. Traffic Generator and Checker (BAS Example Design Only) 7.1.1.3. Avalon-MM Address to PCIe Address Mapping 7.1.1.4. BAR Interpreter
7.1.1.1. DMA Controller (DMA Example Design Only) x
7.1.1.1.1. Register Set 7.1.1.1.2. Deadlock Risk and Avoidance 7.1.1.1.3. Interrupts 7.1.1.1.4. Using the DMA Controller
7.1.1.2. Traffic Generator and Checker (BAS Example Design Only) x
7.1.1.2.1. Register Set
7.1.3. DMA Operations Using the Example Design x
7.1.3.1. Read DMA Example 7.1.3.2. Write DMA Example 7.1.3.3. Using the Traffic Generator (BAS Example Design Only) 7.1.3.4. Using the Traffic Checker (BAS Example Design Only)
B. Root Port BFM x
B.1. Root Port BFM Overview B.2. Issuing Read and Write Transactions to the Application Layer B.3. Configuration of Root Port and Endpoint B.4. Configuration Space Bus and Device Numbering B.5. BFM Memory Map
C. BFM Procedures and Functions x
C.1. ebfm_barwr Procedure C.2. ebfm_barwr_imm Procedure C.3. ebfm_barrd_wait Procedure C.4. ebfm_barrd_nowt Procedure C.5. ebfm_cfgwr_imm_wait Procedure C.6. ebfm_cfgwr_imm_nowt Procedure C.7. ebfm_cfgrd_wait Procedure C.8. ebfm_cfgrd_nowt Procedure C.9. BFM Configuration Procedures C.10. BFM Shared Memory Access Procedures C.11. BFM Log and Message Procedures C.12. Verilog HDL Formatting Functions
C.9. BFM Configuration Procedures x
C.9.1. ebfm_cfg_rp_ep Procedure C.9.2. ebfm_cfg_decode_bar Procedure
C.10. BFM Shared Memory Access Procedures x
C.10.1. Shared Memory Constants C.10.2. shmem_write Procedure C.10.3. shmem_read Function C.10.4. shmem_display Verilog HDL Function C.10.5. shmem_fill Procedure C.10.6. shmem_chk_ok Function
C.11. BFM Log and Message Procedures x
C.11.1. ebfm_display Verilog HDL Function C.11.2. ebfm_log_stop_sim Verilog HDL Function C.11.3. ebfm_log_set_suppressed_msg_mask Task C.11.4. ebfm_log_set_stop_on_msg_mask Verilog HDL Task C.11.5. ebfm_log_open Verilog HDL Function C.11.6. ebfm_log_close Verilog HDL Function
C.12. Verilog HDL Formatting Functions x
C.12.1. himage1 C.12.2. himage2 C.12.3. himage4 C.12.4. himage8 C.12.5. himage16 C.12.6. dimage1 C.12.7. dimage2 C.12.8. dimage3 C.12.9. dimage4 C.12.10. dimage5 C.12.11. dimage6 C.12.12. dimage7
D. Troubleshooting and Observing the Link Status x
D.1. Troubleshooting D.2. PCIe Link Inspector Overview
D.1. Troubleshooting x
D.1.1. Simulation Fails to Progress Beyond Polling.Active State D.1.2. Hardware Bring-Up Issues D.1.3. Link Training D.1.4. Use Third-Party PCIe Analyzer
D.2. PCIe Link Inspector Overview x
D.2.1. PCIe* Link Inspector Hardware
D.2.1. PCIe* Link Inspector Hardware x
D.2.1.1. Enabling the PCIe* Link Inspector D.2.1.2. Launching the PCIe* Link Inspector D.2.1.3. The PCIe* Link Inspector LTSSM Monitor D.2.1.4. Accessing the Configuration Space and Transceiver Registers D.2.1.5. Additional Status Commands
D.2.1.3. The PCIe* Link Inspector LTSSM Monitor x
D.2.1.3.1. LTSSM Monitor Registers D.2.1.3.2. ltssm_save2file <file_name> D.2.1.3.3. ltssm_file2console D.2.1.3.4. ltssm_debug_check D.2.1.3.5. ltssm_display <num_states> D.2.1.3.6. ltssm_save_oldstates
D.2.1.4. Accessing the Configuration Space and Transceiver Registers x
D.2.1.4.1. PCIe* Link Inspector Commands D.2.1.4.2. NPDME PLL and Channel Commands D.2.1.4.3. Register Address Map
D.2.1.5. Additional Status Commands x
D.2.1.5.1. Displaying PLL Lock and Calibration Status Registers
1. Introduction
2. Quick Start Guide
3. Block and Interface Descriptions
4. Parameters
5. Designing with the IP Core
6. Registers
7. Design Example and Testbench
8. Document Revision History for Intel® L- and H-tile Avalon® Memory-mapped+ IP for PCI Express* User Guide
A. Avalon-MM IP Variants Comparison
B. Root Port BFM
C. BFM Procedures and Functions
D. Troubleshooting and Observing the Link Status
E. Root Port Enumeration

7.1.1.1.3. Interrupts

Two application specific bits (bits [13:12]) of the status words from the Write Data Mover and Read Data Mover Status Avalon® -ST Source interfaces control when interrupts are generated.

Table 62.  Interrupts Control
Bit [13] Bit [12] Action
1 1 Interrupt always
1 0 Interrupt if error
0 1 No interrupt
0 0 No interrupt and drop status word (i.e, do not even write it to the WS or RS status queues)

The DMA Controller makes the decision whether to drop the status word and whether to generate an interrupt as soon as it receives the status word from the Data Mover. When generation of an interrupt is requested, and the corresponding RI or WI register does enable interrupts, the DMA Controller generates the interrupt. It does so by queuing an immediate write to the Write Data Mover's descriptor queue specified in the corresponding interrupt control register using the MSI address and message data provided in that register.You need to make sure that space is always available in the targeted Write Data Mover descriptor queue at any time when an interrupt may get generated. You can do so most easily by using the priority queue only for MSIs.

Setting the interrupt control bits in the immediate write descriptors that the DMA Controller creates to generate MSI interrupts to "No interrupt and drop status word" can avoid an infinite loop of interrupts.

Level Two Title