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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/dev/iwlwifi/fw/dhc-utils.h
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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */

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/*

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 * Copyright (C) 2021, 2025 Intel Corporation

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 */

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#ifndef __iwl_fw_dhc_utils_h__

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#define __iwl_fw_dhc_utils_h__

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#include <linux/types.h>

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#include "fw/img.h"

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#include "api/commands.h"

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#include "api/dhc.h"

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/**

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 * iwl_dhc_resp_status - return status of DHC response

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 * @fw: firwmware image information

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 * @pkt: response packet, must not be %NULL

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 *

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 * Returns: the status value of the DHC command or (u32)-1 if the

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 *	    response was too short.

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 */

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static inline u32 iwl_dhc_resp_status(const struct iwl_fw *fw,

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				      struct iwl_rx_packet *pkt)

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{

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	if (iwl_fw_lookup_notif_ver(fw, IWL_ALWAYS_LONG_GROUP,

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				    DEBUG_HOST_COMMAND, 1) >= 2) {

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		struct iwl_dhc_cmd_resp *resp = (void *)pkt->data;

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		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))

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			return (u32)-1;

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		return le32_to_cpu(resp->status);

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	} else {

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		struct iwl_dhc_cmd_resp_v1 *resp = (void *)pkt->data;

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		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))

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			return (u32)-1;

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		return le32_to_cpu(resp->status);

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	}

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}

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/**

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 * iwl_dhc_resp_data - return data pointer of DHC response

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 * @fw: firwmware image information

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 * @pkt: response packet, must not be %NULL

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 * @len: where to store the length

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 *

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 * Returns: The data pointer, or an ERR_PTR() if the data was

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 *	    not valid (too short).

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 */

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static inline void *iwl_dhc_resp_data(const struct iwl_fw *fw,

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				      struct iwl_rx_packet *pkt,

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				      unsigned int *len)

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{

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	if (iwl_fw_lookup_notif_ver(fw, IWL_ALWAYS_LONG_GROUP,

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				    DEBUG_HOST_COMMAND, 1) >= 2) {

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		struct iwl_dhc_cmd_resp *resp = (void *)pkt->data;

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		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))

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			return ERR_PTR(-EINVAL);

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		*len = iwl_rx_packet_payload_len(pkt) - sizeof(*resp);

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		return (void *)&resp->data;

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	} else {

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		struct iwl_dhc_cmd_resp_v1 *resp = (void *)pkt->data;

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		if (iwl_rx_packet_payload_len(pkt) < sizeof(*resp))

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			return ERR_PTR(-EINVAL);

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		*len = iwl_rx_packet_payload_len(pkt) - sizeof(*resp);

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		return (void *)&resp->data;

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	}

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}

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#endif  /* __iwl_fw_dhc_utils_h__ */

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