R-tile Avalon® Streaming Intel® FPGA IP for PCI Express* User Guide

ID 683501
Date 12/13/2021
Public

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Document Table of Contents

4.4.9. Hard IP Status Interface

Table 70.  Hard IP Status Interface Signals
Signal Name Direction Description EP/RP/BP Clock Domain
pX_link_up_o Output When asserted, this signal indicates the link is up. EP/RP/BP coreclkout_hip
pX_dl_up_o Output When asserted, this signal indicates the Data Link (DL) Layer is active. EP/RP/BP coreclkout_hip
pX_ltssm_state_delay_o[5:0] Output

Delayed version of the live LTSSM state of the PCIe Hard IP.

  • 6'h00: S_DETECT_QUIET
  • 6'h01: S_DETECT_ACT
  • 6'h02: S_POLL_ACTIVE
  • 6'h03: S_POLL_COMPLIANCE
  • 6'h04: S_POLL_CONFIG
  • 6'h05: S_PRE_DETECT_QUIET
  • 6'h06: S_DETECT_WAIT
  • 6'h07: S_CFG_LINKWD_START
  • 6'h08: S_CFG_LINKWD_ACCEPT
  • 6'h09: S_CFG_LANENUM_WAIT
  • 6'h0A: S_CFG_LANENUM_ACCEPT
  • 6'h0B: S_CFG_COMPLETE
  • 6'h0C: S_CFG_IDLE
  • 6'h0D: S_RCVRY_LOCK
  • 6'h0E: S_RCVRY_SPEED
  • 6'h0F: S_RCVRY_RCVRCFG
  • 6'h10: S_RCVRY_IDLE
  • 6'h11: S_L0
  • 6'h12: S_L0S
  • 6'h13: S_L123_SEND_EIDLE
  • 6'h14: S_L1_IDLE
  • 6'h15: S_L2_IDLE
  • 6'h16: S_L2_WAKE
  • 6'h17: S_DISABLED_ENTRY
  • 6'h18: S_DISABLED_IDLE
  • 6'h19: S_DISABLED
  • 6'h1A: S_LPBK_ENTRY
  • 6'h1B: S_LPBK_ACTIVE
  • 6'h1C: S_LPBK_EXIT
  • 6'h1D: S_LPBK_EXIT_TIMEOUT
  • 6'h1E: S_HOT_RESET_ENTRY
  • 6'h1F: S_HOT_RESET
  • 6'h20: S_RCVRY_EQ0
  • 6'h21: S_RCVRY_EQ1
  • 6'h22: S_RCVRY_EQ2
  • 6'h23: S_RCVRY_EQ3
EP/RP/BP slow_clk
pX_ltssm_st_hipfifo_ovrflw_o Output PCIe Hard IP FIFO storing ltssm_state changes is full. State changes may have been dropped prior to the current ltssm_state value change. EP/RP/BP slow_clk
pX_surprise_down_err_o Output Surprise Down Error indicator. EP/RP/BP coreclkout_hip
pX_dl_timer_update_o Output This signal asserts when DL Ack/Replay Timers need to be updated due to a change in the Maximum Payload Size, Link Width, or Link Speed. EP/RP/BP coreclkout_hip
pX_tx_ehp_deallocate_empty_o Output This signal indicates when the PCIe Hard IP Tx FIFO is empty. EP/RP/BP coreclkout_hip