Hi folks,
While testing Intel 3168 card. I hit this problem where the driver can't set
regulatory domain properly.
The iwlmvm driver first tries to get regulatory domain from kernel
(iwl_mvm_get_current_regdomain()), and then from bios. Below are the relevant
code from nvm.c, with my debug lines:
886 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
887 if (IS_ERR_OR_NULL(regd))
888 return -EIO;
889
890 IWL_INFO(mvm, "eniacz: regd from kernel=%s\n", regd->alpha2);
891
892 IWL_INFO(mvm, "eniacz: mcc supported=%d\n",
iwl_mvm_is_wifi_mcc_supported(mvm));
893 IWL_INFO(mvm, "eniacz: IWL_UCODE_TLV_API_WIFI_MCC_UPDATE=%d\n",
fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIFI_MCC_UPDATE));
894 IWL_INFO(mvm, "eniacz: IWL_UCODE_TLV_CAPA_LAR_MULTI_MCC=%d\n",
fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_LAR_MULTI_MCC));
895 if (iwl_mvm_is_wifi_mcc_supported(mvm) &&
896 !iwl_mvm_get_bios_mcc(mvm, mcc)) {
897 kfree(regd);
898 regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc,
899 MCC_SOURCE_BIOS, NULL);
900 if (IS_ERR_OR_NULL(regd))
901 return -EIO;
902 IWL_INFO(mvm, "eniacz: regd from bios=%s\n", regd->alpha2);
903 }
904
905 retval = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
906 kfree(regd);
907 return retval;
The first problem is line 890 always returns 00, regardless of what I have set
in cfg80211.
The second problem is that iwlwifi-3168-21.ucode doesn't support MCC, even
though Intel claim 3168 support it. iwlwifi-8000C-14.ucode does support MCC
but that only work with 8260 modules. When I compile code from HEAD, I found
it is requesting version 23 of the firmware (4.6.0 requests 21). But I can't
find v23 firmware anywhere.
My question is how can do I enforce regulatory domain settings on a 3168
module. Either cfg80211 or bios approach will work for me but right now
neither of them is.
Regards/Eniac
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