2.1.1.1. Requirement for F-Tile Devices which are Powered and Unconfigured
2.1.1.2. FGT PAM4 Compliance Support
2.1.1.3. FGT Transceivers Do Not Support Direct EXTEST JTAG Instruction in Boundary Scan Test
2.1.1.4. F-Tile: Unsuccessful TX Equalization
2.1.1.5. Link May Not Downgrade With Corrupt Lanes (F-Tile)
2.1.1.6. Occasional Equalization Timeout or PCIe Link Training Failure to Achieve Expected Link Speed during Link Disable, Hot Reset, and Speed Change
2.1.1.7. Link Fault Detection window of the F-Tile Ethernet Intel FPGA Hard IP in 10GE-1 or 25GE-1 mode
2.1.1.8. FHT PMA Transmitter-to-Receiver Internal Serial Loopback operation for error-free BER results
2.1.1.9. F-Tile Ethernet Altera® FPGA Hard IP rst_tx_stats and rst_rx_stats register bits might not function correctly
2.1.1.10. F-Tile Ethernet Altera® FPGA Hard IP force_rf register bit might not function correctly
2.1.1.11. F-Tile Ethernet Altera® FPGA Hard IP tx_pause_request register bit might not function correctly
2.1.1.12. F-Tile Ethernet Altera® FPGA Hard IP PTP statistics might not clear correctly
2.1.1.13. F-Tile Ethernet Altera® FPGA Hard IP unable to achieve 100% throughput with some variants
2.1.1.14. F-Tile 400G Ethernet Altera® FPGA Hard IP RX Priority Flow Control Issue
2.1.1.15. F-Tile Ethernet Intel FPGA Hard IP Bidirectional Link Fault Signaling Issue
2.1.1.16. F-Tile SDI II IP and F-Tile PMA/FEC Direct PHY IP with “SDI” configuration rule are not of production quality
2.1.1.17. F-Tile HDMI IP and F-Tile PMA/FEC Direct PHY IP with 'HDMI' configuration rule are not of production quality
2.1.2.1. Gen3/Gen4 link might be established without successfully performing Transmit Equalization (TX EQ)
Description
Impacted PCIe* Hard IP Modes
Workaround
Status
2.1.2.2. Link may not downgrade with corrupt lanes
2.1.2.3. Malformed TLP incorrectly flagged as ECRC error
2.1.2.4. Assertion of PERST / warm reset during the Functional Level Reset results in PCIe* Link Failure
2.1.2.5. No Support for Page Request Services in Port 2 and Port 3 of 4x4 Configuration
2.1.2.6. Multiple Fatal Error Messages
2.1.2.7. PCIe* x4 cores may report Uncorrectable Fatal Error or Malformed TLP
2.1.2.8. Receiver Errors logged during back-to-back Secondary Bus Resets (SBR) operations when running at Gen 2 speed
2.1.2.9. Polling.Active time out during Link Disable-Enable loop tests
2.1.2.10. CXL 1.1 version does not support uncorrectable error reporting when receiving two LLCTRL-Init packet
2.2.1. DDR5 x32 + user bits through NoC is not supported
2.2.2. PhyMux EMIF lockstep pinout configurations Restrictions
2.2.3. GPIO-B blocked in mixed GPIO-B/EMIF use cases
2.2.4. DDR4 rDBI is not working
2.2.5. LPDDR5 and DDR5 reduced sequential write/read bandwidth when using Fabric Sync Fabric direct mode in x16 2-channel configuration
2.2.6. LPDDR5 and DDR5 maximum bandwidth for sequential short write is limited
2.2.7. LPDDR5 and DDR5 controller does not support non-aligned transactions
3.1. 843819: Memory Locations May be Accessed Speculatively Due to Instruction Fetches When HCR.VM is Set
3.2. 845719: A Load May Read Incorrect Data
3.3. 855871: ETM Does Not Report IDLE State When Disabled Using OSLOCK
3.4. 855872: A Store-Exclusive Instruction Might Pass When it Should Fail
3.5. 711668: Configuration Extension Register Has Wrong Value Status
3.6. 720107: Periodic Synchronization Can Be Delayed and Cause Overflow
3.7. 855873: An Eviction Might Overtake a Cache Clean Operation
3.8. 853172: ETM May Assert AFREADY Before All Data Has Been Output
3.9. 836870: Non-Allocating Reads May Prevent a Store Exclusive From Passing
3.10. 836919: Write of the JMCR in EL0 Does Not Generate an UNDEFINED Exception
3.11. 845819: Instruction Sequences Containing AES Instructions May Produce Incorrect Results
3.12. 851672: ETM May Trace an Incorrect Exception Address
3.13. 851871: ETM May Lose Counter Events While Entering WFx Mode
3.14. 852071: Direct Branch Instructions Executed Before a Trace Flush May be Output in an Atom Packet After Flush Acknowledgment
3.15. 852521: A64 Unconditional Branch May Jump to Incorrect Address
3.16. 855827: PMU Counter Values May Be Inaccurate When Monitoring Certain Events
3.17. 855829: Reads of PMEVCNTR<n> are not Masked by HDCR.HPMN
3.18. 855830: Loads of Mismatched Size May not be Single-Copy Atomic
2.1.2.1. Gen3/Gen4 link might be established without successfully performing Transmit Equalization (TX EQ)
Description
In the R-Tile Intel® FPGA IP for PCIe* configured natively in Gen5, when a speed change to Gen3/Gen4 speed is attempted for the first time with full TxEq enabled, if all phases of equalization do not successfully complete, the link reverts back to the lowest speed that passed equalization. The Equalization results for Gen3 and Gen4 are recorded in the following registers:
- For Gen3: Link Status 2 Register [4:1]:
- [1] Equalization 8.0 GT/s Complete
- [2] Equalization 8.0 GT/s Phase 1 Successful
- [3] Equalization 8.0 GT/s Phase 2 Successful
- [4] Equalization 8.0 GT/s Phase 3 Successful
- For Gen4: 16.0 GT/s Status Register [3:0]:
- [0] Equalization 16.0 GT/s Complete
- [1] Equalization 16.0 GT/s Phase 1 Successful
- [2] Equalization 16.0 GT/s Phase 2 Successful
- [3] Equalization 16.0 GT/s Phase 3 Successful
If equalization is attempted, the “Complete” bit is set for that speed regardless if the other phases of equalization completed successfully. Once the “Complete” bit is set, the R-Tile permits a speed change by setting the Target Link Speed in the Link Control 2 Register. As a result, the link may train to Gen3/Gen4 speeds with sub-optimal transmitter equalization settings.
To confirm if the transmitter equalization procedure completed successfully, use software to read the following registers and ensure that all bits are set:
- For Gen3: Link Status 2 Register [4:1]
- For Gen4: 16.0 GT/s Status Register [3:0]
To re-initiate the equalization procedure, write 1b to the Perform Equalization bit [0] in the Link Control 3 register.
Impacted PCIe* Hard IP Modes
- Endpoint
- Root Port
- TL Bypass
Workaround
None
Status
| Devices Affected | Planned Fix |
|---|---|
|
None |