wifi: iwlwifi: add support for accepting raw DSM tables by firmware

Firmware would assert on undefined bits in DSM-originated DWs.
With this change, Firmware introduces a fail-safe mechanism
and removes the assert behavior. This ensures robustness when
handling raw DSM table data.

Signed-off-by: Pagadala Yesu Anjaneyulu <pagadala.yesu.anjaneyulu@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250710212632.eee871df03c9.I2be2eaa16437e84aa1be0c6c95ec334034ce7e50@changeid

1 files changed, 26 insertions, 9 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
index 74b90bd92c48..3d6d1a85bb51 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
@@ -579,6 +579,8 @@ int iwl_fill_lari_config(struct iwl_fw_runtime *fwrt,
 {
 	int ret;
 	u32 value;
+	bool has_raw_dsm_capa = fw_has_capa(&fwrt->fw->ucode_capa,
+					    IWL_UCODE_TLV_CAPA_FW_ACCEPTS_RAW_DSM_TABLE);
 	u8 cmd_ver = iwl_fw_lookup_cmd_ver(fwrt->fw,
 					   WIDE_ID(REGULATORY_AND_NVM_GROUP,
 						   LARI_CONFIG_CHANGE), 1);
@@ -593,17 +595,22 @@ int iwl_fill_lari_config(struct iwl_fw_runtime *fwrt,
 	cmd->config_bitmap = iwl_get_lari_config_bitmap(fwrt);
 
 	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_11AX_ENABLEMENT, &value);
-	if (!ret)
+	if (!ret) {
+		if (!has_raw_dsm_capa)
+			value &= DSM_11AX_ALLOW_BITMAP;
 		cmd->oem_11ax_allow_bitmap = cpu_to_le32(value);
+	}
 
 	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ENABLE_UNII4_CHAN, &value);
 	if (!ret) {
-		value &= DSM_UNII4_ALLOW_BITMAP;
+		if (!has_raw_dsm_capa)
+			value &= DSM_UNII4_ALLOW_BITMAP;
 
 		/* Since version 9, bits 4 and 5 are supported
-		 * regardless of this capability.
+		 * regardless of this capability, By pass this masking
+		 * if firmware has capability of accepting raw DSM table.
 		 */
-		if (cmd_ver < 9 &&
+		if (!has_raw_dsm_capa && cmd_ver < 9 &&
 		    !fw_has_capa(&fwrt->fw->ucode_capa,
 				 IWL_UCODE_TLV_CAPA_BIOS_OVERRIDE_5G9_FOR_CA))
 			value &= ~(DSM_VALUE_UNII4_CANADA_OVERRIDE_MSK |
@@ -614,13 +621,17 @@ int iwl_fill_lari_config(struct iwl_fw_runtime *fwrt,
 
 	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ACTIVATE_CHANNEL, &value);
 	if (!ret) {
-		if (cmd_ver < 8)
+		if (!has_raw_dsm_capa)
+			value &= CHAN_STATE_ACTIVE_BITMAP_CMD_V12;
+
+		if (!has_raw_dsm_capa && cmd_ver < 8)
 			value &= ~ACTIVATE_5G2_IN_WW_MASK;
 
 		/* Since version 12, bits 5 and 6 are supported
-		 * regardless of this capability.
+		 * regardless of this capability, By pass this masking
+		 * if firmware has capability of accepting raw DSM table.
 		 */
-		if (cmd_ver < 12 &&
+		if (!has_raw_dsm_capa && cmd_ver < 12 &&
 		    !fw_has_capa(&fwrt->fw->ucode_capa,
 				 IWL_UCODE_TLV_CAPA_BIOS_OVERRIDE_UNII4_US_CA))
 			value &= CHAN_STATE_ACTIVE_BITMAP_CMD_V11;
@@ -633,13 +644,19 @@ int iwl_fill_lari_config(struct iwl_fw_runtime *fwrt,
 		cmd->oem_uhb_allow_bitmap = cpu_to_le32(value);
 
 	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_FORCE_DISABLE_CHANNELS, &value);
-	if (!ret)
+	if (!ret) {
+		if (!has_raw_dsm_capa)
+			value &= DSM_FORCE_DISABLE_CHANNELS_ALLOWED_BITMAP;
 		cmd->force_disable_channels_bitmap = cpu_to_le32(value);
+	}
 
 	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ENERGY_DETECTION_THRESHOLD,
 			       &value);
-	if (!ret)
+	if (!ret) {
+		if (!has_raw_dsm_capa)
+			value &= DSM_EDT_ALLOWED_BITMAP;
 		cmd->edt_bitmap = cpu_to_le32(value);
+	}
 
 	ret = iwl_bios_get_wbem(fwrt, &value);
 	if (!ret)