Unable to bringup PCIe M.2 co-processor

We have Nvidia Jetson Xavier NX dev kit with 5.10.104-tegra, ubuntu 20.04.4 LTS,

while trying to access a PCIE m.2 device by MMAP of bar files, I am getting all 0xffffffff and getting following logs on dmesg,

what is the issue?

how to resolve it?

---------------------dmesg----------------------

[Nov30 11:41] nvidia_smmu_context_fault_bank: 1 callbacks suppressed

[ +0.000023] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000402, iova=0x4000c000, fsynr=0x20011, cbfrsynra=0x145b, cb=7

[ +0.000486] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000402, iova=0x4000c000, fsynr=0x80001, cbfrsynra=0xc5b, cb=7

[ +0.000379] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x402, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.000455] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x402, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.000361] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000400, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.000359] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x402, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.000363] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000400, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.000499] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x402, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.004908] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000402, iova=0x40041000, fsynr=0x20011, cbfrsynra=0x145b, cb=7

[ +0.012149] arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000400, iova=0x40041000, fsynr=0x80001, cbfrsynra=0x5b, cb=7

[ +0.015250] mc-err: unknown mcerr fault, int_status=0x00001040, ch_int_status=0x00000000, hubc_int_status=0x00000000 sbs_int_status=0x00000000, hub_int_status=0x00000000

[ +0.012116] mc-err: unknown mcerr fault, int_status=0x00000000, ch_int_status=0x00000000, hubc_int_status=0x00000000 sbs_int_status=0x00000000, hub_int_status=0x00000000