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| author | Miri Korenblit <miriam.rachel.korenblit@intel.com> | 2024-02-01 16:17:37 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-02-02 14:37:27 +0100 |
| commit | fc7214c3c986142758ae9d2cd456c98e48547b5e (patch) | |
| tree | 7b32b90f834f89ef7707e65879bc17ab32e19675 /drivers/net/wireless/intel/iwlwifi/fw/uefi.c | |
| parent | dc4fe7500e7a1a1ab56a7708ac9be4c90fd12174 (diff) | |
| download | linux-fc7214c3c986142758ae9d2cd456c98e48547b5e.tar.gz linux-fc7214c3c986142758ae9d2cd456c98e48547b5e.tar.bz2 linux-fc7214c3c986142758ae9d2cd456c98e48547b5e.zip | |
wifi: iwlwifi: read DSM functions from UEFI
For each DSM function, try to first read it from the UEFI.
If the UEFI WIFI GUID is unclocked, or the DSM function in
UEFI is invalid/unavailable - read it from ACPI.
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240201155157.27dd626ce2bd.Ib90bab74a9d56deb2362edb712294360e4ddae5b@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 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c index 4454fae84d1f..fe6d0141cd5b 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c @@ -674,3 +674,36 @@ out: kfree(data); return ret; } + +int iwl_uefi_get_dsm(struct iwl_fw_runtime *fwrt, enum iwl_dsm_funcs func, + u32 *value) +{ + struct uefi_cnv_var_general_cfg *data; + int ret = EINVAL; + + /* Not supported function index */ + if (func >= DSM_FUNC_NUM_FUNCS || func == 5) + return -EOPNOTSUPP; + + data = iwl_uefi_get_verified_variable(fwrt->trans, IWL_UEFI_DSM_NAME, + "DSM", sizeof(*data), NULL); + if (IS_ERR(data)) + return -EINVAL; + + if (data->revision != IWL_UEFI_DSM_REVISION) { + IWL_DEBUG_RADIO(fwrt, "Unsupported UEFI DSM revision:%d\n", + data->revision); + goto out; + } + + if (ARRAY_SIZE(data->functions) != UEFI_MAX_DSM_FUNCS) { + IWL_DEBUG_RADIO(fwrt, "Invalid size of DSM functions array\n"); + goto out; + } + + *value = data->functions[func]; + ret = 0; +out: + kfree(data); + return ret; +} |