PCIE IOMMU fault with Wifi Module WMX7205

Hi all,

We encounter the IOMMU fault with the WIFI module WMX7205, whose wifi chip is QCA WCN6856.

Our code base is L4T 32.7.1. It seems SMMU problem. The kernel log is in the file
kernel_msg_tx2.txt (74.9 KB) .

We find the below error messages:

[  641.454603] arm-smmu 12000000.iommu: Unhandled context fault: iova=0x7f66c000, fsynr=0x1, cb=20, sid=17(0x11 - AFI), pgd=0, pud=0, pmd=0, pte=0

[  641.454676] mc-err: vpr base=0:c6000000, size=20, ctrl=3, override:(e01a8341, 1dc10c1, 2a800000, 2)

[  641.454689] mc-err: (255) csw_afiw: MC request violates VPR requirements

[  641.454699] mc-err:   status = 0x00337031; addr = 0x3ffffffc0

[  641.454708] mc-err:   secure: yes, access-type: write

[  641.454727] mc-err: unknown mcerr fault, int_status=0x00000000, ch_int_status=0x00000000, hubc_int_status=0x00000000

[  641.454743] mc-err: unknown mcerr fault, int_status=0x00000000, ch_int_status=0x00000000, hubc_int_status=0x00000000

[  641.454757] mc-err: unknown mcerr fault, int_status=0x00000000, ch_int_status=0x00000000, hubc_int_status=0x00000000

[  641.454770] mc-err: Too many MC errors; throttling prints

[  641.467743] arm-smmu 12000000.iommu: Unhandled context fault: iova=0x7f66c000, fsynr=0x1, cb=20, sid=17(0x11 - AFI), pgd=0, pud=0, pmd=0, pte=0

Thanks,