New Contributor
Regular ContributorHi,
Is the links test 100 read & write passed? Could you please reduce the number of descriptors per DMA, or number of Dwords per descriptor to see if this make any difference?
Regards -SK
New ContributorNo, the the link test failed .We are able to write to the bars but while we read the whole bar becomes fffffffffffff. After rebooting the host PC we are able to see the written data in the bar.
New Contributor*********************************************************
Intel FPGA PCIe Link Test
Version 2.0
0: Automatically select a device
1: Manually select a device
*********************************************************
> 0
Opened a handle to BAR 0 of a device with BDF 0x100
*********************************************************
0: Link test - 100 writes and reads
1: Write memory space
2: Read memory space
3: Write configuration space
4: Read configuration space
5: Change BAR for PIO
6: Change device
7: Enable SRIOV
8: Do a link test for every enabled virtual function
belonging to the current device
9: Perform DMA
10: Quit program
*********************************************************
> 5
Changing BAR...
Enter BAR number (-1 for none):
> 2
Successfully changed BAR!
*********************************************************
0: Link test - 100 writes and reads
1: Write memory space
2: Read memory space
3: Write configuration space
4: Read configuration space
5: Change BAR for PIO
6: Change device
7: Enable SRIOV
8: Do a link test for every enabled virtual function
belonging to the current device
9: Perform DMA
10: Quit program
*********************************************************
> 2
Enter address to read, in hex:
> 0x4
Reading from BDF 0x100 BAR 0x2 offset 0x4..
Read 0
*********************************************************
0: Link test - 100 writes and reads
1: Write memory space
2: Read memory space
3: Write configuration space
4: Read configuration space
5: Change BAR for PIO
6: Change device
7: Enable SRIOV
8: Do a link test for every enabled virtual function
belonging to the current device
9: Perform DMA
10: Quit program
*********************************************************
> 1
Enter address to write, in hex:
> 0x4
Enter 32-bit data to write, in hex:
> 0xaabb
Writing 0xaabb at BDF 0x100 BAR 0x2 offset 0x4..
Wrote successfully!
*********************************************************
0: Link test - 100 writes and reads
1: Write memory space
2: Read memory space
3: Write configuration space
4: Read configuration space
5: Change BAR for PIO
6: Change device
7: Enable SRIOV
8: Do a link test for every enabled virtual function
belonging to the current device
9: Perform DMA
10: Quit program
*********************************************************
> 2
Enter address to read, in hex:
> 0x4
Reading from BDF 0x100 BAR 0x2 offset 0x4..
Read 0xffffffff
*********************************************************
0: Link test - 100 writes and reads
1: Write memory space
2: Read memory space
3: Write configuration space
4: Read configuration space
5: Change BAR for PIO
6: Change device
7: Enable SRIOV
8: Do a link test for every enabled virtual function
belonging to the current device
9: Perform DMA
10: Quit program
*********************************************************
> 10
AFTER REBOOT
vvdn@vvdn-hp:~$ sudo md.l f0210004
f0210004: 0000aabb 00000000 00000000 00000000 ................
f0210014: 00000000 00000000 00000000 00000000 ................
f0210024: 00000000 00000000 00000000 00000000 ................
f0210034: 00000000 00000000 00000000 00000000 ................
f0210044: 00000000 00000000 00000000 00000000 ................
f0210054: 00000000 00000000 00000000 00000000 ................
f0210064: 00000000 00000000 00000000 00000000 ................
f0210074: 00000000 00000000 00000000 00000000 ................
f0210084: 00000000 00000000 00000000 00000000 ................
f0210094: 00000000 00000000 00000000 00000000 ................
f02100a4: 00000000 00000000 00000000 00000000 ................
f02100b4: 00000000 00000000 00000000 00000000 ................
f02100c4: 00000000 00000000 00000000 00000000 ................
f02100d4: 00000000 00000000 00000000 00000000 ................
f02100e4: 00000000 00000000 00000000 00000000 ................
f02100f4: 00000000 00000000 00000000 00000000 ................
New Contributor
