NXP QorIQ T4240 PCIE 64 bit descriptor not working

immbalu — Mon, 13 Jun 2022 04:46:10 GMT

Hello All,

I'm trying to use PCIe 64 bit descriptors and transfer data to processor DDR.

Here is the device tree I'm using

pci0: pcie@ffe240000 { reg = <0xf 0xfe240000 0 0x10000>; num-lanes = <8>; ranges = <0x03000000 0 0xa0000000 0xc 0x00000000 0x0 0x20000000 0x01000000 0 0x00000000 0xf 0xf8000000 0x0 0x00010000>; pcie@0 { ranges = <0x03000000 0 0xa0000000 0x02000000 0 0xa0000000 0 0x20000000 0x01000000 0 0x00000000 0x01000000 0 0x00000000 0 0x00010000>; }; };

I am able to see the data in DDR offset when i use 32 bit ddr offset (Ex:0xDEC0_0000) in descriptors and when I change the address of DDR offset to 64 bit (Ex:0x1_0000_0000). PCIe bandwidth is showing that it is writing the data but i cant able to see data in the DDR. How to i use 64 bit descriptor address?

Thanks and regards,

Balaji.G

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NXP QorIQ T4240 PCIE 64 bit descriptor not working