AXI Multichannel DMA IP for PCI Express* User Guide

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ID 817911
Date 8/11/2025
Public
Document Table of Contents
Document Table of Contents x
1. About This Document 2. Introduction 3. Functional Description 4. Parameters 5. Interfaces 6. Designing with the IP Core 7. Known Issues 8. Revision History for the AXI Multichannel DMA IP for PCI Express* User Guide
1. About This Document x
1.1. Intended Audience 1.2. Conventions 1.3. Terms and Acronyms 1.4. Related Information
2. Introduction x
2.1. Overview 2.2. IP Features 2.3. Device Family Support 2.4. IP and Design Example Support 2.5. Recommended Speed Grade 2.6. Resource Utilization 2.7. Release Information
2.2. IP Features x
2.2.1. Root Port Mode Features 2.2.2. Endpoint Mode Features 2.2.3. Design Example Support
4. Parameters x
4.1. IP Settings 4.2. Design Examples
4.1. IP Settings x
4.1.1. PCIe Settings
4.1.1. PCIe Settings x
4.1.1.1. MCDMA Settings 4.1.1.2. PCI Express / PCI Capabilities 4.1.1.3. Base Address Registers
4.1.1.1. MCDMA Settings x
4.1.1.1.1. Multichannel DMA Mode 4.1.1.1.2. Bursting Master Mode 4.1.1.1.3. Bursting Slave Mode 4.1.1.1.4. BAM+BAS Mode 4.1.1.1.5. BAM+MCDMA Mode 4.1.1.1.6. BAM+BAS+MCDMA Mode
4.1.1.2. PCI Express / PCI Capabilities x
4.1.1.2.1. PCIe Device 4.1.1.2.2. PCIe MSI-X
4.1.1.2.2. PCIe MSI-X x
4.1.1.2.2.1. PCIe PF MSI-X 4.1.1.2.2.2. PCIe VF MSI-X
4.2. Design Examples x
4.2.1. Aligning AXI MCDMA IP Settings with AXI Streaming IP for PCI Express
5. Interfaces x
5.1. System Block Diagram 5.2. Clocks and Resets 5.3. PCIe IP-facing Interfaces 5.4. User-facing Interfaces
5.3. PCIe IP-facing Interfaces x
5.3.1. PCIe AXI-ST TX Interface (ss_tx_st) 5.3.2. PCIe AXI-ST RX Interface (ss_rx_st) 5.3.3. Control and Status Register Interface (ss_csr_lite) 5.3.4. Flow Control Credit Interface 5.3.5. Configuration Intercept Interface (CII) 5.3.6. Completion Timeout Interface (ss_cplto) 5.3.7. Function Level Reset Interface 5.3.8. Control Shadow Interface (ss_ctrlshadow)
5.3.4. Flow Control Credit Interface x
5.3.4.1. Transmit Flow Credit Interface (ss_txcrdt) 5.3.4.2. Receive Flow Control Credit Interface (ss_rxcrdt)
5.3.5. Configuration Intercept Interface (CII) x
5.3.5.1. Configuration Intercept Request Interface (ss_cii_req) 5.3.5.2. Configuration Intercept Response Interface (ss_cii_resp)
5.3.7. Function Level Reset Interface x
5.3.7.1. FLR Received Interface (ss_flrrcvd) 5.3.7.2. FLR Completion Interface (ss_flrcmpl)
5.4. User-facing Interfaces x
5.4.1. H2D AXI-ST Source (h2d_st_initatr) 5.4.2. D2H AXI-ST Sink (d2h_st_respndr) 5.4.3. H2D/D2H AXI-MM Master 5.4.4. BAM AXI-MM Master (bam_mm_initatr) 5.4.5. BAS AXI-MM Slave (bas_mm_respndr) 5.4.6. PIO AXI-Lite Master (pio_lite_initiatr) 5.4.7. HIP Reconfig AXI-Lite Slave (user_csr_lite) 5.4.8. User Event MSI-X (user_msix) 5.4.9. User Event MSI (user_msi) 5.4.10. User Function Level Reset (user_flr) 5.4.11. User Configuration Intercept Interface - EP Only 5.4.12. Configuration Slave (cs_lite_respndr) - RP Only
5.4.3. H2D/D2H AXI-MM Master x
5.4.3.1. AXI-MM Write (H2D) 5.4.3.2. AXI-MM Read Channel (D2H)
5.4.11. User Configuration Intercept Interface - EP Only x
5.4.11.1. User Configuration Intercept Request Interface (user_cii_req) 5.4.11.2. User Configuration Intercept Response Interface (user_cii_resp)
6. Designing with the IP Core x
6.1. Generating the IP Core 6.2. IP Core Generation Output 6.3. Simulating the IP Core 6.4. Quick Start Guide
6.4. Quick Start Guide x
6.4.1. Design Example Overview 6.4.2. Functional Description 6.4.3. Generating the Design Example 6.4.4. Simulating the Design Example 6.4.5. Testing the Design Example
1. About This Document
2. Introduction
3. Functional Description
4. Parameters
5. Interfaces
6. Designing with the IP Core
7. Known Issues
8. Revision History for the AXI Multichannel DMA IP for PCI Express* User Guide

5.3.7.1. FLR Received Interface (ss_flrrcvd)

Interface clock: axi_lite_clk

Table 39.  FLR Received Interface
Signal Name Direction Description
ss_app_st_flrrcvd_tvalid Input

When asserted, indicates a FLR request received from Host. The signal is valid for one clock cycle.
ss_app_st_flrrcvd_tdata[21:0] Input

[2:0] - The PF number of FLR Request

[13:3] - Indicates child VF number of parent PF indicated by PF number.

[14] - Indicates request is for Virtual Function implemented in the slot's Physical Function.

[19:15] - The slot number of FLR Request

[21:20] – The PF number of FLR Request (PF[4:3])
Level Two Title