[PATCH 13/14] wifi: iwlwifi: mvm: use the new command to clear the internal buffer

[Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>]

From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>

The firmware can allow to clear the internal debug buffer. This can be
used to sanitize the data when requested to.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Reviewed-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
---
 drivers/net/wireless/intel/iwlwifi/fw/api/debug.h | 6 ++++++
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c       | 9 +++++++++
 drivers/net/wireless/intel/iwlwifi/fw/file.h      | 4 ++++
 3 files changed, 19 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/debug.h b/drivers/net/wireless/intel/iwlwifi/fw/api/debug.h
index 7b18e098b125..798731ecbefd 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/debug.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/debug.h
@@ -59,6 +59,12 @@ enum iwl_debug_cmds {
 	 * &struct iwl_dbg_dump_complete_cmd
 	 */
 	FW_DUMP_COMPLETE_CMD = 0xB,
+	/**
+	 * @FW_CLEAR_BUFFER:
+	 * clears the firmware's internal buffer
+	 * no payload
+	 */
+	FW_CLEAR_BUFFER = 0xD,
 	/**
 	 * @MFU_ASSERT_DUMP_NTF:
 	 * &struct iwl_mfu_assert_dump_notif
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index f6e399d1e95c..e27774e7ed74 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -3401,6 +3401,15 @@ void iwl_fw_dbg_clear_monitor_buf(struct iwl_fw_runtime *fwrt)
 	struct iwl_fw_dbg_params params = {0};
 
 	iwl_fw_dbg_stop_sync(fwrt);
+
+	if (fw_has_api(&fwrt->fw->ucode_capa,
+		       IWL_UCODE_TLV_API_INT_DBG_BUF_CLEAR)) {
+		struct iwl_host_cmd hcmd = {
+			.id = WIDE_ID(DEBUG_GROUP, FW_CLEAR_BUFFER),
+		};
+		iwl_trans_send_cmd(fwrt->trans, &hcmd);
+	}
+
 	iwl_dbg_tlv_init_cfg(fwrt);
 	iwl_fw_dbg_stop_restart_recording(fwrt, &params, false);
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/file.h b/drivers/net/wireless/intel/iwlwifi/fw/file.h
index c38e5194c55f..bfc39bd5bbc6 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/file.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/file.h
@@ -245,6 +245,8 @@ typedef unsigned int __bitwise iwl_ucode_tlv_api_t;
  *  SCAN_CONFIG_DB_CMD_API_S.
  * @IWL_UCODE_TLV_API_NO_HOST_DISABLE_TX: Firmware offloaded the station disable tx
  *	logic.
+ * @IWL_UCODE_TLV_API_INT_DBG_BUF_CLEAR: Firmware supports clearing the debug
+ *	internal buffer
  *
  * @NUM_IWL_UCODE_TLV_API: number of bits used
  */
@@ -282,7 +284,9 @@ enum iwl_ucode_tlv_api {
 	IWL_UCODE_TLV_API_ADWELL_HB_DEF_N_AP	= (__force iwl_ucode_tlv_api_t)57,
 	IWL_UCODE_TLV_API_SCAN_EXT_CHAN_VER	= (__force iwl_ucode_tlv_api_t)58,
 	IWL_UCODE_TLV_API_BAND_IN_RX_DATA	= (__force iwl_ucode_tlv_api_t)59,
+	/* API Set 2 */
 	IWL_UCODE_TLV_API_NO_HOST_DISABLE_TX	= (__force iwl_ucode_tlv_api_t)66,
+	IWL_UCODE_TLV_API_INT_DBG_BUF_CLEAR     = (__force iwl_ucode_tlv_api_t)67,
 
 	NUM_IWL_UCODE_TLV_API
 /*
-- 
2.34.1