iwlwifi: allow disabling LAR via module param
This module parameter is useful for debugging NVM and LAR related issues.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-drv.c b/drivers/net/wireless/iwlwifi/iwl-drv.c
index 141331d..f1d73d5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/iwlwifi/iwl-drv.c
@@ -1546,6 +1546,10 @@
bool, S_IRUGO);
MODULE_PARM_DESC(d0i3_disable, "disable d0i3 functionality (default: Y)");
+module_param_named(lar_disable, iwlwifi_mod_params.lar_disable,
+ bool, S_IRUGO);
+MODULE_PARM_DESC(lar_disable, "disable LAR functionality (default: N)");
+
module_param_named(uapsd_disable, iwlwifi_mod_params.uapsd_disable,
bool, S_IRUGO | S_IWUSR);
#ifdef CONFIG_IWLWIFI_UAPSD
diff --git a/drivers/net/wireless/iwlwifi/iwl-modparams.h b/drivers/net/wireless/iwlwifi/iwl-modparams.h
index e8eabd2..ac2b90d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-modparams.h
+++ b/drivers/net/wireless/iwlwifi/iwl-modparams.h
@@ -103,6 +103,7 @@
* @debug_level: levels are IWL_DL_*
* @ant_coupling: antenna coupling in dB, default = 0
* @d0i3_disable: disable d0i3, default = 1,
+ * @lar_disable: disable LAR (regulatory), default = 0
* @fw_monitor: allow to use firmware monitor
*/
struct iwl_mod_params {
@@ -121,6 +122,7 @@
char *nvm_file;
bool uapsd_disable;
bool d0i3_disable;
+ bool lar_disable;
bool fw_monitor;
};
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index a196c78..207c3a8 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -917,6 +917,10 @@
bool nvm_lar = mvm->nvm_data->lar_enabled;
bool tlv_lar = mvm->fw->ucode_capa.capa[0] &
IWL_UCODE_TLV_CAPA_LAR_SUPPORT;
+
+ if (iwlwifi_mod_params.lar_disable)
+ return false;
+
/*
* Enable LAR only if it is supported by the FW (TLV) &&
* enabled in the NVM
diff --git a/drivers/net/wireless/iwlwifi/mvm/nvm.c b/drivers/net/wireless/iwlwifi/mvm/nvm.c
index eb40c89..5a16e0d 100644
--- a/drivers/net/wireless/iwlwifi/mvm/nvm.c
+++ b/drivers/net/wireless/iwlwifi/mvm/nvm.c
@@ -264,7 +264,7 @@
{
struct iwl_nvm_section *sections = mvm->nvm_sections;
const __le16 *hw, *sw, *calib, *regulatory, *mac_override, *phy_sku;
- bool is_family_8000_a_step = false;
+ bool is_family_8000_a_step = false, lar_enabled;
/* Checking for required sections */
if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
@@ -312,13 +312,14 @@
(const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data;
+ lar_enabled = !iwlwifi_mod_params.lar_disable &&
+ (mvm->fw->ucode_capa.capa[0] &
+ IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
+
return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib,
regulatory, mac_override, phy_sku,
- mvm->fw->valid_tx_ant,
- mvm->fw->valid_rx_ant,
- mvm->fw->ucode_capa.capa[0] &
- IWL_UCODE_TLV_CAPA_LAR_SUPPORT,
- is_family_8000_a_step);
+ mvm->fw->valid_tx_ant, mvm->fw->valid_rx_ant,
+ lar_enabled, is_family_8000_a_step);
}
#define MAX_NVM_FILE_LEN 16384