Message-Id: <20240809094533.1660-21-yu-hao.lin@nxp.com>
Date: Fri,  9 Aug 2024 17:45:10 +0800
From: David Lin <yu-hao.lin@....com>
To: linux-wireless@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	kvalo@...nel.org,
	johannes@...solutions.net,
	briannorris@...omium.org,
	francesco@...cini.it,
	tsung-hsien.hsieh@....com,
	David Lin <yu-hao.lin@....com>
Subject: [PATCH v2 20/43] wifi: nxpwifi: add ie.c

---
 drivers/net/wireless/nxp/nxpwifi/ie.c | 501 ++++++++++++++++++++++++++
 1 file changed, 501 insertions(+)
 create mode 100644 drivers/net/wireless/nxp/nxpwifi/ie.c

diff --git a/drivers/net/wireless/nxp/nxpwifi/ie.c b/drivers/net/wireless/nxp/nxpwifi/ie.c
new file mode 100644
index 000000000000..15bdc3c7a6fa
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/ie.c
@@ -0,0 +1,501 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: management IE handling- setting and
+ * deleting IE.
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "main.h"
+#include "cmdevt.h"
+
+/* This function checks if current IE index is used by any on other interface.
+ * Return: true: yes, current IE index is used by someone else.
+ *         false: no, current IE index is NOT used by other interface.
+ */
+static bool
+nxpwifi_ie_index_used_by_other_intf(struct nxpwifi_private *priv, u16 idx)
+{
+	int i;
+	struct nxpwifi_adapter *adapter = priv->adapter;
+	struct nxpwifi_ie *ie;
+
+	for (i = 0; i < adapter->priv_num; i++) {
+		if (adapter->priv[i] != priv) {
+			ie = &adapter->priv[i]->mgmt_ie[idx];
+			if (ie->mgmt_subtype_mask && ie->ie_length)
+				return true;
+		}
+	}
+
+	return false;
+}
+
+/* Get unused IE index. This index will be used for setting new IE */
+static int
+nxpwifi_ie_get_autoidx(struct nxpwifi_private *priv, u16 subtype_mask,
+		       struct nxpwifi_ie *ie, u16 *index)
+{
+	u16 mask, len, i;
+
+	for (i = 0; i < priv->adapter->max_mgmt_ie_index; i++) {
+		mask = le16_to_cpu(priv->mgmt_ie[i].mgmt_subtype_mask);
+		len = le16_to_cpu(ie->ie_length);
+
+		if (mask == NXPWIFI_AUTO_IDX_MASK)
+			continue;
+
+		if (mask == subtype_mask) {
+			if (len > IEEE_MAX_IE_SIZE)
+				continue;
+
+			*index = i;
+			return 0;
+		}
+
+		if (!priv->mgmt_ie[i].ie_length) {
+			if (nxpwifi_ie_index_used_by_other_intf(priv, i))
+				continue;
+
+			*index = i;
+			return 0;
+		}
+	}
+
+	return -ENOENT;
+}
+
+/* This function prepares IE data buffer for command to be sent to FW */
+static int
+nxpwifi_update_autoindex_ies(struct nxpwifi_private *priv,
+			     struct nxpwifi_ie_list *ie_list)
+{
+	u16 travel_len, index, mask;
+	s16 input_len, tlv_len;
+	struct nxpwifi_ie *ie;
+	u8 *tmp;
+
+	input_len = le16_to_cpu(ie_list->len);
+	travel_len = sizeof(struct nxpwifi_ie_types_header);
+
+	ie_list->len = 0;
+
+	while (input_len >= sizeof(struct nxpwifi_ie_types_header)) {
+		ie = (struct nxpwifi_ie *)(((u8 *)ie_list) + travel_len);
+		tlv_len = le16_to_cpu(ie->ie_length);
+		travel_len += tlv_len + NXPWIFI_IE_HDR_SIZE;
+
+		if (input_len < tlv_len + NXPWIFI_IE_HDR_SIZE)
+			return -EINVAL;
+		index = le16_to_cpu(ie->ie_index);
+		mask = le16_to_cpu(ie->mgmt_subtype_mask);
+
+		if (index == NXPWIFI_AUTO_IDX_MASK) {
+			/* automatic addition */
+			if (nxpwifi_ie_get_autoidx(priv, mask, ie, &index))
+				return -ENOENT;
+			if (index == NXPWIFI_AUTO_IDX_MASK)
+				return -EINVAL;
+
+			tmp = (u8 *)&priv->mgmt_ie[index].ie_buffer;
+			memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length));
+			priv->mgmt_ie[index].ie_length = ie->ie_length;
+			priv->mgmt_ie[index].ie_index = cpu_to_le16(index);
+			priv->mgmt_ie[index].mgmt_subtype_mask =
+							cpu_to_le16(mask);
+
+			ie->ie_index = cpu_to_le16(index);
+		} else {
+			if (mask != NXPWIFI_DELETE_MASK)
+				return -EINVAL;
+			/* Check if this index is being used on any
+			 * other interface.
+			 */
+			if (nxpwifi_ie_index_used_by_other_intf(priv, index))
+				return -EPERM;
+
+			ie->ie_length = 0;
+			memcpy(&priv->mgmt_ie[index], ie,
+			       sizeof(struct nxpwifi_ie));
+		}
+
+		le16_unaligned_add_cpu
+		(&ie_list->len,
+		 le16_to_cpu(priv->mgmt_ie[index].ie_length) +
+		 NXPWIFI_IE_HDR_SIZE);
+		input_len -= tlv_len + NXPWIFI_IE_HDR_SIZE;
+	}
+
+	if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_UAP)
+		return nxpwifi_send_cmd(priv, HOST_CMD_UAP_SYS_CONFIG,
+					HOST_ACT_GEN_SET,
+					UAP_CUSTOM_IE_I, ie_list, true);
+
+	return 0;
+}
+
+/* Copy individual custom IEs for beacon, probe response and assoc response
+ * and prepare single structure for IE setting.
+ * This function also updates allocated IE indices from driver.
+ */
+static int
+nxpwifi_update_uap_custom_ie(struct nxpwifi_private *priv,
+			     struct nxpwifi_ie *beacon_ie, u16 *beacon_idx,
+			     struct nxpwifi_ie *pr_ie, u16 *probe_idx,
+			     struct nxpwifi_ie *ar_ie, u16 *assoc_idx)
+{
+	struct nxpwifi_ie_list *ap_custom_ie;
+	u8 *pos;
+	u16 len;
+	int ret;
+
+	ap_custom_ie = kzalloc(sizeof(*ap_custom_ie), GFP_KERNEL);
+	if (!ap_custom_ie)
+		return -ENOMEM;
+
+	ap_custom_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
+	pos = (u8 *)ap_custom_ie->ie_list;
+
+	if (beacon_ie) {
+		len = sizeof(struct nxpwifi_ie) - IEEE_MAX_IE_SIZE +
+		      le16_to_cpu(beacon_ie->ie_length);
+		memcpy(pos, beacon_ie, len);
+		pos += len;
+		le16_unaligned_add_cpu(&ap_custom_ie->len, len);
+	}
+	if (pr_ie) {
+		len = sizeof(struct nxpwifi_ie) - IEEE_MAX_IE_SIZE +
+		      le16_to_cpu(pr_ie->ie_length);
+		memcpy(pos, pr_ie, len);
+		pos += len;
+		le16_unaligned_add_cpu(&ap_custom_ie->len, len);
+	}
+	if (ar_ie) {
+		len = sizeof(struct nxpwifi_ie) - IEEE_MAX_IE_SIZE +
+		      le16_to_cpu(ar_ie->ie_length);
+		memcpy(pos, ar_ie, len);
+		pos += len;
+		le16_unaligned_add_cpu(&ap_custom_ie->len, len);
+	}
+
+	ret = nxpwifi_update_autoindex_ies(priv, ap_custom_ie);
+
+	pos = (u8 *)(&ap_custom_ie->ie_list[0].ie_index);
+	if (beacon_ie && *beacon_idx == NXPWIFI_AUTO_IDX_MASK) {
+		/* save beacon ie index after auto-indexing */
+		*beacon_idx = le16_to_cpu(ap_custom_ie->ie_list[0].ie_index);
+		len = sizeof(*beacon_ie) - IEEE_MAX_IE_SIZE +
+		      le16_to_cpu(beacon_ie->ie_length);
+		pos += len;
+	}
+	if (pr_ie && le16_to_cpu(pr_ie->ie_index) == NXPWIFI_AUTO_IDX_MASK) {
+		/* save probe resp ie index after auto-indexing */
+		*probe_idx = *((u16 *)pos);
+		len = sizeof(*pr_ie) - IEEE_MAX_IE_SIZE +
+		      le16_to_cpu(pr_ie->ie_length);
+		pos += len;
+	}
+	if (ar_ie && le16_to_cpu(ar_ie->ie_index) == NXPWIFI_AUTO_IDX_MASK)
+		/* save assoc resp ie index after auto-indexing */
+		*assoc_idx = *((u16 *)pos);
+
+	kfree(ap_custom_ie);
+	return ret;
+}
+
+/* This function checks if the vendor specified IE is present in passed buffer
+ * and copies it to nxpwifi_ie structure.
+ * Function takes pointer to struct nxpwifi_ie pointer as argument.
+ * If the vendor specified IE is present then memory is allocated for
+ * nxpwifi_ie pointer and filled in with IE. Caller should take care of freeing
+ * this memory.
+ */
+static int nxpwifi_update_vs_ie(const u8 *ies, int ies_len,
+				struct nxpwifi_ie **ie_ptr, u16 mask,
+				unsigned int oui, u8 oui_type)
+{
+	struct element *vs_ie;
+	struct nxpwifi_ie *ie = *ie_ptr;
+	const u8 *vendor_ie;
+
+	vendor_ie = cfg80211_find_vendor_ie(oui, oui_type, ies, ies_len);
+	if (vendor_ie) {
+		if (!*ie_ptr) {
+			*ie_ptr = kzalloc(sizeof(*ie_ptr), GFP_KERNEL);
+			if (!*ie_ptr)
+				return -ENOMEM;
+			ie = *ie_ptr;
+		}
+
+		vs_ie = (struct element *)vendor_ie;
+		if (le16_to_cpu(ie->ie_length) + vs_ie->datalen + 2 >
+			IEEE_MAX_IE_SIZE)
+			return -EINVAL;
+		memcpy(ie->ie_buffer + le16_to_cpu(ie->ie_length),
+		       vs_ie, vs_ie->datalen + 2);
+		le16_unaligned_add_cpu(&ie->ie_length, vs_ie->datalen + 2);
+		ie->mgmt_subtype_mask = cpu_to_le16(mask);
+		ie->ie_index = cpu_to_le16(NXPWIFI_AUTO_IDX_MASK);
+	}
+
+	*ie_ptr = ie;
+	return 0;
+}
+
+/* This function parses beacon IEs, probe response IEs, association response IEs
+ * from cfg80211_ap_settings->beacon and sets these IE to FW.
+ */
+static int nxpwifi_set_mgmt_beacon_data_ies(struct nxpwifi_private *priv,
+					    struct cfg80211_beacon_data *data)
+{
+	struct nxpwifi_ie *beacon_ie = NULL, *pr_ie = NULL, *ar_ie = NULL;
+	u16 beacon_idx = NXPWIFI_AUTO_IDX_MASK, pr_idx = NXPWIFI_AUTO_IDX_MASK;
+	u16 ar_idx = NXPWIFI_AUTO_IDX_MASK;
+	int ret = 0;
+
+	if (data->beacon_ies && data->beacon_ies_len) {
+		nxpwifi_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
+				     &beacon_ie, MGMT_MASK_BEACON,
+				     WLAN_OUI_MICROSOFT,
+				     WLAN_OUI_TYPE_MICROSOFT_WPS);
+		nxpwifi_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
+				     &beacon_ie, MGMT_MASK_BEACON,
+				     WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
+	}
+
+	if (data->proberesp_ies && data->proberesp_ies_len) {
+		nxpwifi_update_vs_ie(data->proberesp_ies,
+				     data->proberesp_ies_len, &pr_ie,
+				     MGMT_MASK_PROBE_RESP, WLAN_OUI_MICROSOFT,
+				     WLAN_OUI_TYPE_MICROSOFT_WPS);
+		nxpwifi_update_vs_ie(data->proberesp_ies,
+				     data->proberesp_ies_len, &pr_ie,
+				     MGMT_MASK_PROBE_RESP,
+				     WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
+	}
+
+	if (data->assocresp_ies && data->assocresp_ies_len) {
+		nxpwifi_update_vs_ie(data->assocresp_ies,
+				     data->assocresp_ies_len, &ar_ie,
+				     MGMT_MASK_ASSOC_RESP |
+				     MGMT_MASK_REASSOC_RESP,
+				     WLAN_OUI_MICROSOFT,
+				     WLAN_OUI_TYPE_MICROSOFT_WPS);
+		nxpwifi_update_vs_ie(data->assocresp_ies,
+				     data->assocresp_ies_len, &ar_ie,
+				     MGMT_MASK_ASSOC_RESP |
+				     MGMT_MASK_REASSOC_RESP, WLAN_OUI_WFA,
+				     WLAN_OUI_TYPE_WFA_P2P);
+	}
+
+	if (beacon_ie || pr_ie || ar_ie) {
+		ret = nxpwifi_update_uap_custom_ie(priv, beacon_ie,
+						   &beacon_idx, pr_ie,
+						   &pr_idx, ar_ie, &ar_idx);
+		if (ret)
+			goto done;
+	}
+
+	priv->beacon_idx = beacon_idx;
+	priv->proberesp_idx = pr_idx;
+	priv->assocresp_idx = ar_idx;
+
+done:
+	kfree(beacon_ie);
+	kfree(pr_ie);
+	kfree(ar_ie);
+
+	return ret;
+}
+
+/* This function parses  head and tail IEs, from cfg80211_beacon_data and sets
+ * these IE to FW.
+ */
+static int nxpwifi_uap_parse_tail_ies(struct nxpwifi_private *priv,
+				      struct cfg80211_beacon_data *info)
+{
+	struct nxpwifi_ie *gen_ie;
+	struct element *hdr;
+	struct ieee80211_vendor_ie *vendorhdr;
+	u16 gen_idx = NXPWIFI_AUTO_IDX_MASK, ie_len = 0;
+	int left_len, parsed_len = 0;
+	unsigned int token_len;
+	int ret = 0;
+
+	if (!info->tail || !info->tail_len)
+		return 0;
+
+	gen_ie = kzalloc(sizeof(*gen_ie), GFP_KERNEL);
+	if (!gen_ie)
+		return -ENOMEM;
+
+	left_len = info->tail_len;
+
+	/* Many IEs are generated in FW by parsing bss configuration.
+	 * Let's not add them here; else we may end up duplicating these IEs
+	 */
+	while (left_len > sizeof(struct element)) {
+		hdr = (void *)(info->tail + parsed_len);
+		token_len = hdr->datalen + sizeof(struct element);
+		if (token_len > left_len) {
+			ret = -EINVAL;
+			goto done;
+		}
+
+		switch (hdr->id) {
+		case WLAN_EID_SSID:
+		case WLAN_EID_SUPP_RATES:
+		case WLAN_EID_COUNTRY:
+		case WLAN_EID_PWR_CONSTRAINT:
+		case WLAN_EID_ERP_INFO:
+		case WLAN_EID_EXT_SUPP_RATES:
+		case WLAN_EID_HT_CAPABILITY:
+		case WLAN_EID_HT_OPERATION:
+		case WLAN_EID_VHT_CAPABILITY:
+		case WLAN_EID_VHT_OPERATION:
+			break;
+		case WLAN_EID_VENDOR_SPECIFIC:
+			/* Skip only Microsoft WMM IE */
+			if (cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
+						    WLAN_OUI_TYPE_MICROSOFT_WMM,
+						    (const u8 *)hdr,
+						    token_len))
+				break;
+			fallthrough;
+		default:
+			if (ie_len + token_len > IEEE_MAX_IE_SIZE) {
+				ret = -EINVAL;
+				goto done;
+			}
+			memcpy(gen_ie->ie_buffer + ie_len, hdr, token_len);
+			ie_len += token_len;
+			break;
+		}
+		left_len -= token_len;
+		parsed_len += token_len;
+	}
+
+	/* parse only WPA vendor IE from tail, WMM IE is configured by
+	 * bss_config command
+	 */
+	vendorhdr = (void *)cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
+						    WLAN_OUI_TYPE_MICROSOFT_WPA,
+						    info->tail, info->tail_len);
+	if (vendorhdr) {
+		token_len = vendorhdr->len + sizeof(struct element);
+		if (ie_len + token_len > IEEE_MAX_IE_SIZE) {
+			ret = -EINVAL;
+			goto done;
+		}
+		memcpy(gen_ie->ie_buffer + ie_len, vendorhdr, token_len);
+		ie_len += token_len;
+	}
+
+	if (!ie_len)
+		goto done;
+
+	gen_ie->ie_index = cpu_to_le16(gen_idx);
+	gen_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON |
+						MGMT_MASK_PROBE_RESP |
+						MGMT_MASK_ASSOC_RESP);
+	gen_ie->ie_length = cpu_to_le16(ie_len);
+
+	ret = nxpwifi_update_uap_custom_ie(priv, gen_ie, &gen_idx, NULL,
+					   NULL, NULL, NULL);
+
+	if (ret)
+		goto done;
+
+	priv->gen_idx = gen_idx;
+
+ done:
+	kfree(gen_ie);
+	return ret;
+}
+
+/* This function parses different IEs-head & tail IEs, beacon IEs,
+ * probe response IEs, association response IEs from cfg80211_ap_settings
+ * function and sets these IE to FW.
+ */
+int nxpwifi_set_mgmt_ies(struct nxpwifi_private *priv,
+			 struct cfg80211_beacon_data *info)
+{
+	int ret;
+
+	ret = nxpwifi_uap_parse_tail_ies(priv, info);
+
+	if (ret)
+		return ret;
+
+	return nxpwifi_set_mgmt_beacon_data_ies(priv, info);
+}
+
+/* This function removes management IE set */
+int nxpwifi_del_mgmt_ies(struct nxpwifi_private *priv)
+{
+	struct nxpwifi_ie *beacon_ie = NULL, *pr_ie = NULL;
+	struct nxpwifi_ie *ar_ie = NULL, *gen_ie = NULL;
+	int ret = 0;
+
+	if (priv->gen_idx != NXPWIFI_AUTO_IDX_MASK) {
+		gen_ie = kmalloc(sizeof(*gen_ie), GFP_KERNEL);
+		if (!gen_ie)
+			return -ENOMEM;
+
+		gen_ie->ie_index = cpu_to_le16(priv->gen_idx);
+		gen_ie->mgmt_subtype_mask = cpu_to_le16(NXPWIFI_DELETE_MASK);
+		gen_ie->ie_length = 0;
+		ret = nxpwifi_update_uap_custom_ie(priv, gen_ie, &priv->gen_idx,
+						   NULL, &priv->proberesp_idx,
+						   NULL, &priv->assocresp_idx);
+		if (ret)
+			goto done;
+
+		priv->gen_idx = NXPWIFI_AUTO_IDX_MASK;
+	}
+
+	if (priv->beacon_idx != NXPWIFI_AUTO_IDX_MASK) {
+		beacon_ie = kmalloc(sizeof(*beacon_ie), GFP_KERNEL);
+		if (!beacon_ie) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
+		beacon_ie->mgmt_subtype_mask = cpu_to_le16(NXPWIFI_DELETE_MASK);
+		beacon_ie->ie_length = 0;
+	}
+	if (priv->proberesp_idx != NXPWIFI_AUTO_IDX_MASK) {
+		pr_ie = kmalloc(sizeof(*pr_ie), GFP_KERNEL);
+		if (!pr_ie) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
+		pr_ie->mgmt_subtype_mask = cpu_to_le16(NXPWIFI_DELETE_MASK);
+		pr_ie->ie_length = 0;
+	}
+	if (priv->assocresp_idx != NXPWIFI_AUTO_IDX_MASK) {
+		ar_ie = kmalloc(sizeof(*ar_ie), GFP_KERNEL);
+		if (!ar_ie) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
+		ar_ie->mgmt_subtype_mask = cpu_to_le16(NXPWIFI_DELETE_MASK);
+		ar_ie->ie_length = 0;
+	}
+
+	if (beacon_ie || pr_ie || ar_ie)
+		ret = nxpwifi_update_uap_custom_ie(priv,
+						   beacon_ie, &priv->beacon_idx,
+						   pr_ie, &priv->proberesp_idx,
+						   ar_ie, &priv->assocresp_idx);
+
+done:
+	kfree(gen_ie);
+	kfree(beacon_ie);
+	kfree(pr_ie);
+	kfree(ar_ie);
+
+	return ret;
+}
-- 
2.34.1

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