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Figure 17-2: Top-Level Chaining DMA Example for Simulation
Root Complex
CPU
Root Port
Memory
Write
Descriptor
Table
Data
Chaining DMA
Endpoint Memory
Avalon-MM
interfaces
Hard IP for
PCI Express
DMA Control/Status Register
DMA Read
Avalon-ST
Configuration
PCI Express
DMA Write
DMA Wr Cntl (0x0-4)
DMA Rd Cntl (0x10-1C)
RC Slave
Read
Descriptor
Table
The block diagram contains the following elements:
• Endpoint DMA write and read requester modules.
• The chaining DMA design example connects to the Avalon-ST interface of the Arria V GZ Hard IP for
PCI Express. The connections consist of the following interfaces:
• The Avalon-ST RX receives TLP header and data information from the Hard IP block
• The Avalon-ST TX transmits TLP header and data information to the Hard IP block
• The Avalon-ST MSI port requests MSI interrupts from the Hard IP block
• The sideband signal bus carries static information such as configuration information
• The descriptor tables of the DMA read and the DMA write are located in the BFM shared memory.
• A RC CPU and associated PCI Express PHY link to the Endpoint design example, using a Root Port
and a north/south bridge.
The example Endpoint design Application Layer accomplishes the following objectives:
• Shows you how to interface to the Arria V GZ Hard IP for PCI Express using the Avalon-ST protocol.
• Provides a chaining DMA channel that initiates memory read and write transactions on the PCI
Express link.
• If the ECRC forwarding functionality is enabled, provides a CRC Compiler IP core to check the ECRC
dword from the Avalon-ST RX path and to generate the ECRC for the Avalon-ST TX path.
17-6
Chaining DMA Design Examples
UG-01127_avst
2014.12.15
Altera Corporation
Testbench and Design Example
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- User Guide 1
- Datasheet 2
- Features 3
- Interface 4
- Release Information 7
- Device Family Support 7
- UG-01127_avst 10
- 2014.12.15 10
- Debug Features 11
- IP Core Verification 11
- Recommended Speed Grades 12
- • All Development Kits 14
- PCI Express 15
- Qsys Design Flow 16
- Generating the Testbench 18
- Simulating the Example Design 18
- Directory Description 19
- Time TLP Type Payload 19
- TLP Header 19
- Modifying the Example Design 23
- Separate Component 24
- Generating the Qsys System 27
- Parameter Value 28
- Parameter Settings 38
- Parameter Value Description 39
- Device Capabilities 45
- Error Reporting 47
- Link Capabilities 48
- MSI and MSI-X Capabilities 49
- Slot Capabilities 50
- Power Management 51
- PHY Characteristics 52
- Avalon‑ST RX Interface 54
- Packet TLP 59
- Aligned Addresses 64
- Single Packet Per Cycle 67
- Avalon-ST TX Interface 70
- Data 0 Header 2 83
- Clock Signals 85
- ECRC Forwarding 90
- Error Signals 90
- Interrupts for Endpoints 91
- Completion Side Band Signals 92
- Signal Directi 93
- Description 93
- Parity Signals 95
- LMI Signals 96
- Altera Corporation 100
- Send Feedback 100
- Field and Bit Map 105
- 0134678951 105
- Bit(s) Field Description 106
- Related Information 106
- Signal Direction Description 107
- Power Management Signals 108
- 15 011623 8 2791213142431 110
- Transceiver Reconfiguration 111
- Serial Data Signals 112
- PIPE Interface Signals 116
- Test Signals 121
- Registers 122
- Altera-Defined VSEC Registers 130
- CvP Registers 131
- 2014.08.18 132
- Bits Register Description 135
- Reset and Clocks 138
- Example Design 139
- Hard IP for PCI Express 139
- Clock Domains 142
- Data Rate Frequency 143
- Clock Summary 145
- Interrupts 146
- MSI Interrupts 147
- Allocated 148
- Implementing MSI-X Interrupts 149
- Legacy Interrupts 151
- Interrupts for Root Ports 152
- Error Handling 153
- Physical Layer Errors 154
- Data Link Layer Errors 154
- Transaction Layer Errors 155
- Error Type Description 156
- Status Bit Conditions 159
- IP Core Architecture 161
- Hard IP for PCI Express 162
- Top-Level Interfaces 163
- Avalon-ST Interface 163
- Clocks and Reset 164
- Hard IP Reconfiguration 164
- Transaction Layer 165
- Configuration Space 167
- (Soft Logic) 168
- Altera FPGA 168
- Protocol Extensions Supported 172
- Data Link Layer 172
- Physical Layer 174
- TX Packets 175
- Supported Message Types 177
- INTX Messages 177
- Power Management Messages 178
- Error Signaling Messages 179
- Locked Transaction Message 180
- Slot Power Limit Message 180
- Vendor-Defined Messages 180
- Hot Plug Messages 181
- Receive Buffer Reordering 183
- Using Relaxed Ordering 185
- Throughput Optimization 188
- Throughput of Posted Writes 190
- Design Implementation 192
- CONF_DONE 193
- Endpoint Reset 193
- Root Port Reset 193
- SDC Timing Constraints 194
- Optional Features 196
- ECRC on the RX Path 197
- ECRC on the TX Path 198
- Subscribe 201
- Testbench and Design Example 205
- Root Port Testbench 208
- Chaining DMA Design Examples 208
- Root Complex 210
- Chaining DMA 210
- Hard IP for 210
- BAR/Address Map 213
- Memory BAR Mapping 214
- Bit Field Description 215
- Addr Register Name 215
- Byte Address 218
- Offset to Base 218
- Descriptor Type Description 218
- Bits[21:18] Bit[17] Bit[16] 219
- Descriptor Field Endpoint 219
- RC Access Description 219
- Test Driver Module 220
- DMA Write Cycles 221
- Shared Memory 222
- DMA Read Cycles 223
- Registers (BAR2) 224
- Root Port Design Example 225
- Root Port 226
- Variation 226
- (variation_name.v) 226
- Root Port BFM 227
- BFM Configuration Procedures 228
- BFM Request Interface 228
- BFM Memory Map 229
- Offset (Bytes) Description 231
- BFM Procedures and Functions 235
- Location altpcietb_bfm_rdwr.v 236
- Express address 237
- Shared Memory Constants 244
- Constant Description 245
- Location 250
- Debugging Simulations 262
- Debugging 263
- Setting Up Simulation 269
- Use Third-Party PCIe Analyzer 270
- BIOS Enumeration Issues 270
- Address[31:2] 271
- Figure A-6: I/O Read Request 273
- 7 6 5 4 3 2 1 0 277
- Core Config 8 4 1 277
- Additional Information 279
- Date Version Changes Made 280
- How to Contact Altera 283
- Typographic Conventions 284
- Visual Cue Meaning 285
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