diff options
| author | Miri Korenblit <miriam.rachel.korenblit@intel.com> | 2024-02-01 16:17:31 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-02-02 14:37:27 +0100 |
| commit | 669761e897a4fc87ae0e4625590f2a396a87a3d1 (patch) | |
| tree | 422bb4b49c38623a56876d0f69ae4ca4bff5066d /drivers/net/wireless/intel/iwlwifi/fw/uefi.c | |
| parent | 4dde4ff0eadd6cde43aa5f39fbea36355f9f6e44 (diff) | |
wifi: iwlwifi: read WRDD table from UEFI
Try to read the WRDD table from UEFI first,
and if the WIFI UEFI tables are unlocked or the
table doesn't exist - try to read it from ACPI.
Change iwl_acpi_get_mcc() to receive fwrt as argument so
it will be the same as all iwl_acpi_get_x() functions,
so it could be generated by the macro.
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240201155157.5d52eeb109f7.I4d81700a7ae7fe2dfee14e363de358be59de7823@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/uefi.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/uefi.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c index 5ec82205be12..cd897ad504d6 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c @@ -621,3 +621,34 @@ out: kfree(data); return ret; } + +int iwl_uefi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc) +{ + struct uefi_cnv_var_wrdd *data; + int ret = 0; + + data = iwl_uefi_get_verified_variable(fwrt->trans, IWL_UEFI_WRDD_NAME, + "WRDD", sizeof(*data), NULL); + if (IS_ERR(data)) + return -EINVAL; + + if (data->revision != IWL_UEFI_WRDD_REVISION) { + ret = -EINVAL; + IWL_DEBUG_RADIO(fwrt, "Unsupported UEFI WRDD revision:%d\n", + data->revision); + goto out; + } + + if (data->mcc != UEFI_MCC_CHINA) { + ret = -EINVAL; + IWL_DEBUG_RADIO(fwrt, "UEFI WRDD is supported only for CN\n"); + goto out; + } + + mcc[0] = (data->mcc >> 8) & 0xff; + mcc[1] = data->mcc & 0xff; + mcc[2] = '\0'; +out: + kfree(data); + return ret; +} |