Expand imx6q pcie memory space

[sukrubahadir]

Hello,

I am using imx6q based board, and I am trying to communicate with custom board using pcie.

My custom board request 64MB memory space but imx6q have 15MB memory space. So In dmesg, I saw kernel messages like "BAR 0: no space for [mem size 0x04000000 64bit] ".

When I change the im6q with imx7d which have 255MB pcie memory space, memory assignment stage is successful.

So I wonder that, in imx6q, can I expand pcie memory space for communicate with my custom board ? or do you have any advice ?

Thank for your response!

[igorpadykov]

Hi Şükrü

PCIe memory capabilities are described in

PCIe BAR length limit 

expanding pcie memory was discussed on

memory - Why aren't there PCIe RAM expansions? - Super User 

Best regards
igor
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