Commit 0f48b8b8 authored by Johannes Berg's avatar Johannes Berg
Browse files

wifi: ieee80211: add definitions for multi-link element 



Add the definitions necessary to build and parse some of the
multi-link element, the per-STA profile isn't fully included.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 9ecff10e

include/linux/ieee80211.h

+222 −0
Original line number Diff line number Diff line
@@ -4379,4 +4379,226 @@ enum ieee80211_range_params_max_total_ltf { 
/* multi-link device */

#define IEEE80211_MLD_MAX_NUM_LINKS	15



#define IEEE80211_ML_CONTROL_TYPE			0x0007

#define IEEE80211_ML_CONTROL_TYPE_BASIC			0

#define IEEE80211_ML_CONTROL_TYPE_PREQ			1

#define IEEE80211_ML_CONTROL_TYPE_RECONF		2

#define IEEE80211_ML_CONTROL_TYPE_TDLS			3

#define IEEE80211_ML_CONTROL_TYPE_PRIO_ACCESS		4

#define IEEE80211_ML_CONTROL_PRESENCE_MASK		0xfff0



struct ieee80211_multi_link_elem {

	__le16 control;

	u8 variable[];

} __packed;



#define IEEE80211_MLC_BASIC_PRES_LINK_ID		0x0010

#define IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT	0x0020

#define IEEE80211_MLC_BASIC_PRES_MED_SYNC_DELAY		0x0040

#define IEEE80211_MLC_BASIC_PRES_EML_CAPA		0x0080

#define IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP		0x0100

#define IEEE80211_MLC_BASIC_PRES_MLD_ID			0x0200



#define IEEE80211_MED_SYNC_DELAY_DURATION		0x00ff

#define IEEE80211_MED_SYNC_DELAY_SYNC_OFDM_ED_THRESH	0x0f00

#define IEEE80211_MED_SYNC_DELAY_SYNC_MAX_NUM_TXOPS	0xf000



#define IEEE80211_EML_CAP_EMLSR_SUPP			0x0001

#define IEEE80211_EML_CAP_EMLSR_PADDING_DELAY		0x000e

#define  IEEE80211_EML_CAP_EMLSR_PADDING_DELAY_0US		0

#define  IEEE80211_EML_CAP_EMLSR_PADDING_DELAY_32US		1

#define  IEEE80211_EML_CAP_EMLSR_PADDING_DELAY_64US		2

#define  IEEE80211_EML_CAP_EMLSR_PADDING_DELAY_128US		3

#define  IEEE80211_EML_CAP_EMLSR_PADDING_DELAY_256US		4

#define IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY	0x0070

#define  IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_0US		0

#define  IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_16US		1

#define  IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_32US		2

#define  IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_64US		3

#define  IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_128US		4

#define  IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_256US		5

#define IEEE80211_EML_CAP_EMLMR_SUPPORT			0x0080

#define IEEE80211_EML_CAP_EMLMR_DELAY			0x0700

#define  IEEE80211_EML_CAP_EMLMR_DELAY_0US			0

#define  IEEE80211_EML_CAP_EMLMR_DELAY_32US			1

#define  IEEE80211_EML_CAP_EMLMR_DELAY_64US			2

#define  IEEE80211_EML_CAP_EMLMR_DELAY_128US			3

#define  IEEE80211_EML_CAP_EMLMR_DELAY_256US			4

#define IEEE80211_EML_CAP_TRANSITION_TIMEOUT		0x7800

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_0			0

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_128US		1

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_256US		2

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_512US		3

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_1TU		4

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_2TU		5

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_4TU		6

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_8TU		7

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_16TU		8

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_32TU		9

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_64TU		10

#define  IEEE80211_EML_CAP_TRANSITION_TIMEOUT_128TU		11



#define IEEE80211_MLD_CAP_OP_MAX_SIMUL_LINKS		0x000f

#define IEEE80211_MLD_CAP_OP_SRS_SUPPORT		0x0010

#define IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP	0x0060

#define IEEE80211_MLD_CAP_OP_FREQ_SEP_TYPE_IND		0x0f80

#define IEEE80211_MLD_CAP_OP_AAR_SUPPORT		0x1000



struct ieee80211_mle_basic_common_info {

	u8 len;

	u8 mld_mac_addr[ETH_ALEN];

	u8 variable[];

} __packed;



#define IEEE80211_MLC_PREQ_PRES_MLD_ID			0x0010



struct ieee80211_mle_preq_common_info {

	u8 len;

	u8 variable[];

} __packed;



#define IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR		0x0010



/* no fixed fields in RECONF */



struct ieee80211_mle_tdls_common_info {

	u8 len;

	u8 ap_mld_mac_addr[ETH_ALEN];

} __packed;



#define IEEE80211_MLC_PRIO_ACCESS_PRES_AP_MLD_MAC_ADDR	0x0010



/* no fixed fields in PRIO_ACCESS */



/**

 * ieee80211_mle_common_size - check multi-link element common size

 * @data: multi-link element, must already be checked for size using

 *	ieee80211_mle_size_ok()

 */

static inline u8 ieee80211_mle_common_size(const u8 *data)

{

	const struct ieee80211_multi_link_elem *mle = (const void *)data;

	u16 control = le16_to_cpu(mle->control);

	u8 common = 0;



	switch (u16_get_bits(control, IEEE80211_ML_CONTROL_TYPE)) {

	case IEEE80211_ML_CONTROL_TYPE_BASIC:

		common += sizeof(struct ieee80211_mle_basic_common_info);

		break;

	case IEEE80211_ML_CONTROL_TYPE_PREQ:

		common += sizeof(struct ieee80211_mle_preq_common_info);

		break;

	case IEEE80211_ML_CONTROL_TYPE_RECONF:

		if (control & IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR)

			common += ETH_ALEN;

		return common;

	case IEEE80211_ML_CONTROL_TYPE_TDLS:

		common += sizeof(struct ieee80211_mle_tdls_common_info);

		break;

	case IEEE80211_ML_CONTROL_TYPE_PRIO_ACCESS:

		if (control & IEEE80211_MLC_PRIO_ACCESS_PRES_AP_MLD_MAC_ADDR)

			common += ETH_ALEN;

		return common;

	default:

		WARN_ON(1);

		return 0;

	}



	return common + mle->variable[0];

}



/**

 * ieee80211_mle_size_ok - validate multi-link element size

 * @data: pointer to the element data

 * @len: length of the containing element

 */

static inline bool ieee80211_mle_size_ok(const u8 *data, u8 len)

{

	const struct ieee80211_multi_link_elem *mle = (const void *)data;

	u8 fixed = sizeof(*mle);

	u8 common = 0;

	bool check_common_len = false;

	u16 control;



	if (len < fixed)

		return false;



	control = le16_to_cpu(mle->control);



	switch (u16_get_bits(control, IEEE80211_ML_CONTROL_TYPE)) {

	case IEEE80211_ML_CONTROL_TYPE_BASIC:

		common += sizeof(struct ieee80211_mle_basic_common_info);

		check_common_len = true;

		if (control & IEEE80211_MLC_BASIC_PRES_LINK_ID)

			common += 1;

		if (control & IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT)

			common += 1;

		if (control & IEEE80211_MLC_BASIC_PRES_MED_SYNC_DELAY)

			common += 2;

		if (control & IEEE80211_MLC_BASIC_PRES_EML_CAPA)

			common += 2;

		if (control & IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP)

			common += 2;

		if (control & IEEE80211_MLC_BASIC_PRES_MLD_ID)

			common += 1;

		break;

	case IEEE80211_ML_CONTROL_TYPE_PREQ:

		common += sizeof(struct ieee80211_mle_preq_common_info);

		if (control & IEEE80211_MLC_PREQ_PRES_MLD_ID)

			common += 1;

		check_common_len = true;

		break;

	case IEEE80211_ML_CONTROL_TYPE_RECONF:

		if (control & IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR)

			common += ETH_ALEN;

		break;

	case IEEE80211_ML_CONTROL_TYPE_TDLS:

		common += sizeof(struct ieee80211_mle_tdls_common_info);

		check_common_len = true;

		break;

	case IEEE80211_ML_CONTROL_TYPE_PRIO_ACCESS:

		if (control & IEEE80211_MLC_PRIO_ACCESS_PRES_AP_MLD_MAC_ADDR)

			common += ETH_ALEN;

		break;

	default:

		/* we don't know this type */

		return true;

	}



	if (len < fixed + common)

		return false;



	if (!check_common_len)

		return true;



	/* if present, common length is the first octet there */

	return mle->variable[0] >= common;

}



enum ieee80211_mle_subelems {

	IEEE80211_MLE_SUBELEM_PER_STA_PROFILE		= 0,

};



#define IEEE80211_MLE_STA_CONTROL_LINK_ID			0x000f

#define IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE		0x0010

#define IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT		0x0020

#define IEEE80211_MLE_STA_CONTROL_BEACON_INT_PRESENT		0x0040

#define IEEE80211_MLE_STA_CONTROL_TSF_OFFS_PRESENT		0x0080

#define IEEE80211_MLE_STA_CONTROL_DTIM_INFO_PRESENT		0x0100

#define IEEE80211_MLE_STA_CONTROL_NSTR_LINK_PAIR_PRESENT	0x0200

#define IEEE80211_MLE_STA_CONTROL_NSTR_BITMAP_SIZE		0x0400

#define IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT	0x0800



struct ieee80211_mle_per_sta_profile {

	__le16 control;

	u8 sta_info_len;

	u8 variable[];

} __packed;



#define for_each_mle_subelement(_elem, _data, _len)			\

	if (ieee80211_mle_size_ok(_data, _len))				\

		for_each_element(_elem,					\

				 _data + ieee80211_mle_common_size(_data),\

				 _len - ieee80211_mle_common_size(_data))



#endif /* LINUX_IEEE80211_H */