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MSI and MSI-X Capabilities
Table 3-7: MSI and MSI-X Capabilities
Parameter Value Description
MSI messages
requested
1, 2, 4, 8, 16 Specifies the number of messages the Application Layer can
request. Sets the value of the Multiple Message Capable
field of the Message Control register, 0x050[31:16].
MSI-X Capabilities
Implement MSI-X On/Off When On, enables the MSI-X functionality.
Bit Range
Table size [10:0] System software reads this field to determine the MSI-X Table
size <n>, which is encoded as <n–1>. For example, a returned
value of 2047 indicates a table size of 2048. This field is read-
only. Legal range is 0–2047 (2
11
).
Address offset: 0x068[26:16]
Table Offset [31:0] Points to the base of the MSI-X Table. The lower 3 bits of the
table BAR indicator (BIR) are set to zero by software to form a
32-bit qword-aligned offset. This field is read-only.
Table BAR
Indicator
[2:0] Specifies which one of a function’s BARs, located beginning at
0x10 in Configuration Space, is used to map the MSI-X table
into memory space. This field is read-only. Legal range is 0–5.
Pending Bit Array
(PBA) Offset
[31:0] Used as an offset from the address contained in one of the
function’s Base Address registers to point to the base of the
MSI-X PBA. The lower 3 bits of the PBA BIR are set to zero by
software to form a 32-bit qword-aligned offset. This field is
read-only.
PBA BAR Indicator
[2:0] Specifies the function Base Address registers, located
beginning at 0x10 in Configuration Space, that maps the MSI-
X PBA into memory space. This field is read-only. Legal range
is 0–5.
Related Information
PCI Express Base Specification Revision 2.1 or 3.0
3-8
MSI and MSI-X Capabilities
UG-01097_avmm
2014.12.15
Altera Corporation
Parameter Settings
Send Feedback
- User Guide 1
- Datasheet 2
- Features 3
- Interface 4
- Release Information 7
- Device Family Support 7
- Altera FPGA 8
- Debug Features 10
- IP Core Verification 10
- Recommended Speed Grades 11
- Running Qsys 14
- Generating the Example Design 15
- Simulating Altera Designs 17
- Time TLP Type Payload 18
- TLP Header 18
- Creating a Quartus II Project 19
- Compiling the Design 19
- Programming a Device 20
- Parameter Settings 21
- Parameter Value Description 22
- Device Capabilities 25
- Error Reporting 26
- Link Capabilities 27
- MSI and MSI-X Capabilities 28
- Power Management 29
- Clock Domains on page 6-5 33
- Application Layer 34
- RX Avalon-MM Master Signals 36
- Clock Signals 41
- Signal Direction Description 42
- Variant Logical Interfaces 49
- Hard IP Status Extension 50
- Field and Bit Map 58
- 0134678951 58
- Bit(s) Field Description 59
- Serial Data Signals 60
- PIPE Interface Signals 64
- Test Signals 69
- Registers 70
- Altera-Defined VSEC Registers 78
- CvP Registers 79
- Address Range Register 83
- Bit Name Access Description 84
- Bits Name Access Description 85
- PCI Express Mailbox Registers 86
- Avalon-MM Mailbox Registers 90
- Address Name Access 91
- Description 91
- Byte Offset 91
- Register Dir Description 91
- Sending a Write TLP 97
- Root Port TLP Data Registers 99
- UG-01097_avmm 100
- 2014.12.15 100
- Related Information 101
- Bits Register Description 102
- Reset and Clocks 105
- Hard IP for PCI Express 106
- Example Design 106
- Clock Domains 109
- Data Rate Frequency 110
- Clock Summary 112
- Interrupts for Endpoints 113
- MSI/MSI‑X Support 115
- MsiIntfc_o[81:0] 116
- MsiControl_o[15:0] 116
- MsixIntfc_o[15:0] 116
- IntxReq_i 116
- IntxAck_o 116
- Error Handling 117
- Physical Layer Errors 118
- Data Link Layer Errors 118
- Transaction Layer Errors 119
- Error Type Description 120
- Status Bit Conditions 123
- IP Core Architecture 125
- Hard IP for PCI Express 126
- Top-Level Interfaces 127
- Avalon-MM Interface 127
- Clocks and Reset 127
- Transceiver Reconfiguration 127
- Interrupts 127
- Data Link Layer 128
- Altera Corporation 129
- Send Feedback 129
- Physical Layer 130
- TX Packets 131
- Avalon‑MM Bridge TLPs 135
- Byte Enable Value Description 136
- PCI Express Avalon-MM Bridge 138
- RX Block 144
- Avalon-MM RX Master Block 144
- TX Block 145
- Interrupt Handler Block 145
- Enable PLL calibration 147
- Throughput Optimization 151
- Throughput of Posted Writes 153
- Design Implementation 155
- CONF_DONE 156
- Endpoint Reset 156
- Root Port Reset 156
- SDC Timing Constraints 157
- Optional Features 159
- ECRC on the RX Path 160
- ECRC on the TX Path 161
- Debugging 163
- Setting Up Simulation 166
- Use Third-Party PCIe Analyzer 168
- BIOS Enumeration Issues 168
- Address[31:2] 169
- Figure A-6: I/O Read Request 171
- 7 6 5 4 3 2 1 0 175
- Core Config 8 4 1 175
- Additional Information 177
- Date Version Changes Made 178
- How to Contact Altera 182
- Typographic Conventions 182
- Visual Cue Meaning 183
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