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Original question:

TDA4VM: PCIe Endpoint Mode: Errors when adding more than 1 physical function to endpoint node

TDA4VM: PCIe Endpoint Mode: Errors when adding more than 1 physical function to endpoint node

Thomas Dorsch
Expert 2601 points
Part Number: TDA4VM

Hi,

unfortunately the original thread has been closed meanwhile:

I would like to give feedback to Kishons patch:

1. No patch + 1 PF (physical function): The pcitest functions work.
2. No patch + 6 PF: The RC hangs after boot
3. Patch + 1 PF: The RC hangs after boot
4. Patch + 6 PF: the pcitest functions do *not* return, iE doe not work. I tested this only with the first physcial function though

Kishon, did you test your patch with 6 physical functions and verified it with pcitest?

Thanks and very best regards,
Thomas

  • 0
    Expert 2601 points

    Hi,

    are there any udpates on this?

    Thanks and best regards,
    Thomas

  • 0 in reply to Thomas Dorsch
    Expert 2601 points

    Hi,

    I would really need some support here. I think the issue here is that some MSI-Interrupts from EP to RC are not recognized by RC. I've created a script which reproduces the issue consistently.

    1. This script configures 6 physical functions on EP

    #!/bin/sh

echo "Configure PCIe EP"
cd /sys/kernel/config/pci_ep/
mkdir functions/pci_epf_test/func1
echo 0x104c > functions/pci_epf_test/func1/vendorid
echo 0xb00d > functions/pci_epf_test/func1/deviceid
echo 2 > functions/pci_epf_test/func1/msi_interrupts
echo 2 > functions/pci_epf_test/func1/msix_interrupts
ln -s functions/pci_epf_test/func1 controllers/2900000.pcie-ep/

cd /sys/kernel/config/pci_ep/
mkdir functions/pci_epf_test/func2
echo 0x104c > functions/pci_epf_test/func2/vendorid
echo 0xb00d > functions/pci_epf_test/func2/deviceid
echo 2 > functions/pci_epf_test/func2/msi_interrupts
echo 2 > functions/pci_epf_test/func2/msix_interrupts
ln -s functions/pci_epf_test/func2 controllers/2900000.pcie-ep/

cd /sys/kernel/config/pci_ep/
mkdir functions/pci_epf_test/func3
echo 0x104c > functions/pci_epf_test/func3/vendorid
echo 0xb00d > functions/pci_epf_test/func3/deviceid
echo 2 > functions/pci_epf_test/func3/msi_interrupts
echo 2 > functions/pci_epf_test/func3/msix_interrupts
ln -s functions/pci_epf_test/func3 controllers/2900000.pcie-ep/

cd /sys/kernel/config/pci_ep/
mkdir functions/pci_epf_test/func4
echo 0x104c > functions/pci_epf_test/func4/vendorid
echo 0xb00d > functions/pci_epf_test/func4/deviceid
echo 2 > functions/pci_epf_test/func4/msi_interrupts
echo 2 > functions/pci_epf_test/func4/msix_interrupts
ln -s functions/pci_epf_test/func4 controllers/2900000.pcie-ep/

cd /sys/kernel/config/pci_ep/
mkdir functions/pci_epf_test/func5
echo 0x104c > functions/pci_epf_test/func5/vendorid
echo 0xb00d > functions/pci_epf_test/func5/deviceid
echo 2 > functions/pci_epf_test/func5/msi_interrupts
echo 2 > functions/pci_epf_test/func5/msix_interrupts
ln -s functions/pci_epf_test/func5 controllers/2900000.pcie-ep/

cd /sys/kernel/config/pci_ep/
mkdir functions/pci_epf_test/func6
echo 0x104c > functions/pci_epf_test/func6/vendorid
echo 0xb00d > functions/pci_epf_test/func6/deviceid
echo 2 > functions/pci_epf_test/func6/msi_interrupts
echo 2 > functions/pci_epf_test/func6/msix_interrupts
ln -s functions/pci_epf_test/func6 controllers/2900000.pcie-ep/

echo 1 > controllers/2900000.pcie-ep/start

echo "Finished PCIe EP configuration"

    2. Execute this in / of RC. I assume, pcitest is also placed in /

    #!/bin/sh

bSize=( 0 1 2 3 4 5 4 3 2 1 0 1 2 2 3 4 5 2 1 2 3 4 5 3 1 4 1 2 3 5 3 2 1 )
resultDir="pciresults"

action="-m 1"
#action="-z"

echo "Starting Tests..."
./pcitest -D /dev/pci-endpoint-test.0 -i 1
./pcitest -D /dev/pci-endpoint-test.1 -i 1
./pcitest -D /dev/pci-endpoint-test.2 -i 1
./pcitest -D /dev/pci-endpoint-test.3 -i 1
./pcitest -D /dev/pci-endpoint-test.4 -i 1
./pcitest -D /dev/pci-endpoint-test.5 -i 1


echo "Activate MSI interrupts"
mkdir -p  $resultDir/testsWithDMA
iter=0
for bs in "${bSize[@]}"
do
    printf "Physical Function $bs IR test" 
    ./pcitest -D /dev/pci-endpoint-test.$bs $action
done

echo "Tests finished!"

    3. My Result:

    root@j7-evm:~# cd /
root@j7-evm:/# sh executeTestsIR.sh
Starting Tests...
SET IRQ TYPE TO MSI:            OKAY
SET IRQ TYPE TO MSI:            OKAY
SET IRQ TYPE TO MSI:            OKAY
SET IRQ TYPE TO MSI:            OKAY
SET IRQ TYPE TO MSI:            OKAY
SET IRQ TYPE TO MSI:            OKAY
Activate MSI interrupts
Physical Function 0 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 4 IR testMSI1:                OKAY
Physical Function 5 IR testMSI1:                OKAY
Physical Function 4 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Physical Function 0 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 4 IR testMSI1:                OKAY
Physical Function 5 IR testMSI1:                OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 4 IR testMSI1:                OKAY
Physical Function 5 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Physical Function 4 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 5 IR testMSI1:                OKAY
Physical Function 3 IR testMSI1:                OKAY
Physical Function 2 IR testMSI1:                OKAY
Physical Function 1 IR testMSI1:                NOT OKAY
Tests finished!
root@j7-evm:/#

    For me, it seems that physical function "1" does not work when executing the MSI interrupt test. Is my assumption or configuration wrong?

    If you need more details/data please ask.

    Best regards,
    Thomas