qcacmn: Parse EML capability subfield in Common info for non-AP MLD

Parse EML capability sub field present in Common Info field of Basic
Multi-Link element from Association request send by non-AP MLD.

Add new API to get EML capabilities from the ML IE.
Update definitions for EML as per IEEE802.11be D1.5.
Store parsed EML capability in node to send these to Target.

CRs-Fixed: 3203322
Change-Id: Ib208ba2d8e86df7360656c1c844e4835a93cedc4

umac/mlo_mgr/src/utils_mlo.c

@@ -2313,6 +2313,90 @@ util_get_mlie_variant(uint8_t *mlieseq, qdf_size_t mlieseqlen,
 	return QDF_STATUS_SUCCESS;
 }
 
+QDF_STATUS
+util_get_bvmlie_eml_cap(uint8_t *mlieseq, qdf_size_t mlieseqlen,
+			bool *eml_cap_found,
+			uint16_t *eml_cap)
+{
+	struct wlan_ie_multilink *mlie_fixed;
+	enum wlan_ml_variant variant;
+	uint16_t mlcontrol;
+	uint8_t eml_cap_offset;
+	uint8_t commoninfo_len;
+	uint16_t presencebitmap;
+
+	if (!mlieseq || !mlieseqlen || !eml_cap_found || !eml_cap)
+		return QDF_STATUS_E_NULL_VALUE;
+
+	*eml_cap = 0;
+	*eml_cap_found = false;
+
+	if (mlieseqlen < sizeof(struct wlan_ie_multilink))
+		return QDF_STATUS_E_INVAL;
+
+	mlie_fixed = (struct wlan_ie_multilink *)mlieseq;
+
+	if ((mlie_fixed->elem_id != WLAN_ELEMID_EXTN_ELEM) ||
+	    (mlie_fixed->elem_id_ext != WLAN_EXTN_ELEMID_MULTI_LINK))
+		return QDF_STATUS_E_INVAL;
+
+	mlcontrol = qdf_le16_to_cpu(mlie_fixed->mlcontrol);
+
+	variant = QDF_GET_BITS(mlcontrol, WLAN_ML_CTRL_TYPE_IDX,
+			       WLAN_ML_CTRL_TYPE_BITS);
+
+	if (variant != WLAN_ML_VARIANT_BASIC)
+		return QDF_STATUS_E_INVAL;
+
+	presencebitmap = QDF_GET_BITS(mlcontrol, WLAN_ML_CTRL_PBM_IDX,
+				      WLAN_ML_CTRL_PBM_BITS);
+
+	/* eml_cap_offset stores the offset of EML Capabilities within
+	 * Common Info
+	 */
+	eml_cap_offset = WLAN_ML_BV_CINFO_LENGTH_SIZE + QDF_MAC_ADDR_SIZE;
+	if (presencebitmap & WLAN_ML_BV_CTRL_PBM_LINKIDINFO_P)
+		eml_cap_offset += WLAN_ML_BV_CINFO_LINKIDINFO_SIZE;
+	if (presencebitmap & WLAN_ML_BV_CTRL_PBM_BSSPARAMCHANGECNT_P)
+		eml_cap_offset += WLAN_ML_BV_CINFO_BSSPARAMCHNGCNT_SIZE;
+	if (presencebitmap & WLAN_ML_BV_CTRL_PBM_MEDIUMSYNCDELAYINFO_P)
+		eml_cap_offset += WLAN_ML_BV_CINFO_MEDMSYNCDELAYINFO_SIZE;
+
+	if (presencebitmap & WLAN_ML_BV_CTRL_PBM_EMLCAP_P) {
+		/* Common Info starts at
+		 * mlieseq + sizeof(struct wlan_ie_multilink).
+		 * Check if there is sufficient space in the buffer for
+		 * the Common Info Length.
+		 */
+		if (mlieseqlen < (sizeof(struct wlan_ie_multilink) +
+				  WLAN_ML_BV_CINFO_LENGTH_SIZE))
+			return QDF_STATUS_E_PROTO;
+
+		/* Check if the value indicated in the Common Info Length
+		 * subfield is sufficient to access the EML capabilities.
+		 */
+		commoninfo_len = *(mlieseq + sizeof(struct wlan_ie_multilink));
+		if (commoninfo_len < (eml_cap_offset +
+				      WLAN_ML_BV_CINFO_EMLCAP_SIZE))
+			return QDF_STATUS_E_PROTO;
+
+		/* Common Info starts at mlieseq + sizeof(struct
+		 * wlan_ie_multilink). Check if there is sufficient space in
+		 * Common Info for the EML capability.
+		 */
+		if (mlieseqlen < (sizeof(struct wlan_ie_multilink) +
+				  eml_cap_offset +
+				  WLAN_ML_BV_CINFO_EMLCAP_SIZE))
+			return QDF_STATUS_E_PROTO;
+
+		*eml_cap_found = true;
+		*eml_cap = qdf_le16_to_cpu(*(uint16_t *)(mlieseq +
+							 sizeof(struct wlan_ie_multilink) +
+							 eml_cap_offset));
+	}
+	return QDF_STATUS_SUCCESS;
+}
+
 QDF_STATUS
 util_get_bvmlie_mldmacaddr(uint8_t *mlieseq, qdf_size_t mlieseqlen,
 			   struct qdf_mac_addr *mldmacaddr)