1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dhc-utils.h b/drivers/net/wireless/intel/iwlwifi/fw/dhc-utils.h
new file mode 100644
index 000000000000..983acee5cd7d
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dhc-utils.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2021, 2025 Intel Corporation
+ */
+#ifndef __iwl_fw_dhc_utils_h__
+#define __iwl_fw_dhc_utils_h__
+
+#include <linux/types.h>
+#include "fw/img.h"
+#include "api/commands.h"
+#include "api/dhc.h"
+
+/**
+ * iwl_dhc_resp_status - return status of DHC response
+ * @fw: firwmware image information
+ * @pkt: response packet, must not be %NULL
+ *
+ * Returns: the status value of the DHC command or (u32)-1 if the
+ *	    response was too short.
+ */
+static inline u32 iwl_dhc_resp_status(const struct iwl_fw *fw,
+				      struct iwl_rx_packet *pkt)
+{
+	if (iwl_fw_lookup_notif_ver(fw, IWL_ALWAYS_LONG_GROUP,
+				    DEBUG_HOST_COMMAND, 1) >= 2) {
+		struct iwl_dhc_cmd_resp *resp = (void *)pkt->data;
+
+		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))
+			return (u32)-1;
+
+		return le32_to_cpu(resp->status);
+	} else {
+		struct iwl_dhc_cmd_resp_v1 *resp = (void *)pkt->data;
+
+		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))
+			return (u32)-1;
+
+		return le32_to_cpu(resp->status);
+	}
+}
+
+/**
+ * iwl_dhc_resp_data - return data pointer of DHC response
+ * @fw: firwmware image information
+ * @pkt: response packet, must not be %NULL
+ * @len: where to store the length
+ *
+ * Returns: The data pointer, or an ERR_PTR() if the data was
+ *	    not valid (too short).
+ */
+static inline void *iwl_dhc_resp_data(const struct iwl_fw *fw,
+				      struct iwl_rx_packet *pkt,
+				      unsigned int *len)
+{
+	if (iwl_fw_lookup_notif_ver(fw, IWL_ALWAYS_LONG_GROUP,
+				    DEBUG_HOST_COMMAND, 1) >= 2) {
+		struct iwl_dhc_cmd_resp *resp = (void *)pkt->data;
+
+		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))
+			return ERR_PTR(-EINVAL);
+
+		*len = iwl_rx_packet_payload_len(pkt) - sizeof(*resp);
+		return (void *)&resp->data;
+	} else {
+		struct iwl_dhc_cmd_resp_v1 *resp = (void *)pkt->data;
+
+		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))
+			return ERR_PTR(-EINVAL);
+
+		*len = iwl_rx_packet_payload_len(pkt) - sizeof(*resp);
+		return (void *)&resp->data;
+	}
+}
+
+#endif  /* __iwl_fw_dhc_utils_h__ */