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MMate10's avatar
MMate10
Icon for New Contributor rankNew Contributor
6 years ago

Using PCI Express on Linux with DE10-Pro-GX-280-4G (Stratix 10)

Hello,

I'm trying to run demonstrations distributed with the DE10-Pro board on a Linux system. I have Quartus Pro 19.2 installed. I'm doing the following:

a) Run Demonstrations/PCIe_DDR4/demo_batch/test.sh, it successfully programs the board.

b) Soft-reboot the computer. Now I've got the following entry in lspci output:

83:00.0 Non-VGA unclassified device: Altera Corporation Device e003 (rev 01)

I have the following in dmesg:

[   1.527793] pci 0000:83:00.0: [1172:e003] type 00 class 0x000000
[   1.527820] pci 0000:83:00.0: reg 0x10: [mem 0x00000000-0x000001ff 64bit pref]
[   1.527843] pci 0000:83:00.0: reg 0x20: [mem 0x00000000-0x07ffffff 64bit pref]
[   1.527858] pci 0000:83:00.0: enabling Extended Tags
...
[    1.570379] pnp 00:03: disabling [mem 0x00000400-0x000004ff] because it overlaps 0000:83:00.0 BAR 4 [mem 0x00000000-0x07ffffff 64bit pref]
...
[    1.573414] pnp 00:0d: disabling [mem 0x00000000-0x0009ffff] because it overlaps 0000:83:00.0 BAR 4 [mem 0x00000000-0x07ffffff 64bit pref]

c) Compile and load the driver in Demonstrations/PCIe_SW_KIT/Linux/PCIe_Driver, and get the following in dmesg:

[   50.093063] altera_pcie: loading out-of-tree module taints kernel.
[   50.093123] altera_pcie: module verification failed: signature and/or required key missing - tainting kernel
[   50.093492] Altera PCIE: altera_pcie_init(), Aug  5 2019 19:11:18
[   50.093592] Altera PCIE 0000:83:00.0: can't enable device: BAR 0 [mem 0x00000000-0x000001ff 64bit pref] not claimed
[   50.093669] Altera PCIE 0000:83:00.0: pci_enable_device() failed
[   50.093713] Altera PCIE 0000:83:00.0: goto err_enable
[   50.093751] Altera PCIE 0000:83:00.0: goto err_initchrdev
[   50.093791] Altera PCIE 0000:83:00.0: goto err_bk_alloc
[   50.093894] Altera PCIE: probe of 0000:83:00.0 failed with error -22

d) the /dev/altera_pcie0 device does not show up, running Demonstrations/PCIe_DDR4/demo_batch/linux_app/PCIE_DDR4 fails.

My system is Debian 10 Buster, kernel 4.19.0-5-amd64. The computer is a workstation with two XEON E5 2620 v2.

4 Replies

  • BoonT_Intel's avatar
    BoonT_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago

    Hi Sir,

    This DE board is develop by third party vendor. I also believe the demo design /PCIe_DDR4/demo_batch/test.sh is from third party.

    For the third party issue, please contact the vendor directly for better support.

    Thanks.

  • MMate10's avatar
    MMate10
    Icon for New Contributor rankNew Contributor
    6 years ago

    Found the problem. Looks like Linux doesn't really like zero PCI device code and class code. When I created a new project with the Avalon-MM Intel Stratix 10 Hard IP+ for PCI Express, with zero PCI device and class code, the problem persisted. With the device and class code non-zero, everything works fine.

  • BoonT_Intel's avatar
    BoonT_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago

    Hi,

    Thanks for your sharing. I think it is true that in certain system, we need to enter a non-zero value to device ID and class code. Example, in the S10 platform reference design, we also need to enter a predefined value to the device id and class code.