diff mbox series

[4/6] wifi: rtw89: apply MLD pairwise key to dynamically active links

Message ID 20241107084041.20775-5-pkshih@realtek.com (mailing list archive)
State Changes Requested
Delegated to: Ping-Ke Shih
Headers show
Series wifi: rtw89: preparation for MLO including AP_LINK_PS feature, ieee80211_ops and links | expand

Commit Message

Ping-Ke Shih Nov. 7, 2024, 8:40 a.m. UTC 
From: Zong-Zhe Yang <kevin_yang@realtek.com>

In MLD connection, a pairwise key should work on all active links. And, we
take just one entry in security CAM for one pairwise key. (It means we will
reuse one single entry for all links.) Originally, we already applied the
security CAM entry of pairwise key to deflink's address CAM.

However, links can be activated dynamically. So now for pairwise keys, each
rtw89_sta records the IDs of the security CAM entries. Then, when driver is
notified that some links are active via change_sta_links(), we apply target
pairwise keys to them according to the record.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/cam.c      | 32 ++++++++++++++++---
 drivers/net/wireless/realtek/rtw89/cam.h      |  5 +++
 drivers/net/wireless/realtek/rtw89/core.h     |  4 +++
 drivers/net/wireless/realtek/rtw89/mac80211.c | 16 ++++++++++
 4 files changed, 53 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtw89/cam.c b/drivers/net/wireless/realtek/rtw89/cam.c
index 8ef59994c0db..8fa1e6c1ce13 100644
--- a/drivers/net/wireless/realtek/rtw89/cam.c
+++ b/drivers/net/wireless/realtek/rtw89/cam.c
@@ -135,8 +135,8 @@  static int rtw89_cam_get_avail_sec_cam(struct rtw89_dev *rtwdev,
 }
 
 static int rtw89_cam_get_addr_cam_key_idx(struct rtw89_addr_cam_entry *addr_cam,
-					  struct rtw89_sec_cam_entry *sec_cam,
-					  struct ieee80211_key_conf *key,
+					  const struct rtw89_sec_cam_entry *sec_cam,
+					  const struct ieee80211_key_conf *key,
 					  u8 *key_idx)
 {
 	u8 idx;
@@ -246,8 +246,8 @@  static int __rtw89_cam_detach_sec_cam(struct rtw89_dev *rtwdev,
 static int __rtw89_cam_attach_sec_cam(struct rtw89_dev *rtwdev,
 				      struct rtw89_vif_link *rtwvif_link,
 				      struct rtw89_sta_link *rtwsta_link,
-				      struct ieee80211_key_conf *key,
-				      struct rtw89_sec_cam_entry *sec_cam)
+				      const struct ieee80211_key_conf *key,
+				      const struct rtw89_sec_cam_entry *sec_cam)
 {
 	struct rtw89_addr_cam_entry *addr_cam;
 	u8 key_idx = 0;
@@ -286,6 +286,22 @@  static int __rtw89_cam_attach_sec_cam(struct rtw89_dev *rtwdev,
 	return 0;
 }
 
+int rtw89_cam_attach_link_sec_cam(struct rtw89_dev *rtwdev,
+				  struct rtw89_vif_link *rtwvif_link,
+				  struct rtw89_sta_link *rtwsta_link,
+				  u8 sec_cam_idx)
+{
+	struct rtw89_cam_info *cam_info = &rtwdev->cam_info;
+	const struct rtw89_sec_cam_entry *sec_cam;
+
+	sec_cam = cam_info->sec_entries[sec_cam_idx];
+	if (!sec_cam)
+		return -ENOENT;
+
+	return __rtw89_cam_attach_sec_cam(rtwdev, rtwvif_link, rtwsta_link,
+					  sec_cam->key_conf, sec_cam);
+}
+
 static int rtw89_cam_detach_sec_cam(struct rtw89_dev *rtwdev,
 				    struct ieee80211_vif *vif,
 				    struct ieee80211_sta *sta,
@@ -306,6 +322,9 @@  static int rtw89_cam_detach_sec_cam(struct rtw89_dev *rtwdev,
 
 	rtwvif = vif_to_rtwvif(vif);
 
+	if (rtwsta)
+		clear_bit(sec_cam->sec_cam_idx, rtwsta->pairwise_sec_cam_map);
+
 	rtw89_vif_for_each_link(rtwvif, rtwvif_link, link_id) {
 		rtwsta_link = rtwsta ? rtwsta->links[link_id] : NULL;
 		if (rtwsta && !rtwsta_link)
@@ -369,6 +388,8 @@  static int rtw89_cam_attach_sec_cam(struct rtw89_dev *rtwdev,
 			return ret;
 	}
 
+	set_bit(sec_cam->sec_cam_idx, rtwsta->pairwise_sec_cam_map);
+
 	return 0;
 }
 
@@ -410,6 +431,9 @@  static int rtw89_cam_sec_key_install(struct rtw89_dev *rtwdev,
 	sec_cam->len = RTW89_SEC_CAM_LEN;
 	sec_cam->ext_key = ext_key;
 	memcpy(sec_cam->key, key->key, key->keylen);
+
+	sec_cam->key_conf = key;
+
 	ret = rtw89_cam_send_sec_key_cmd(rtwdev, sec_cam);
 	if (ret) {
 		rtw89_err(rtwdev, "failed to send sec key cmd: %d\n", ret);
diff --git a/drivers/net/wireless/realtek/rtw89/cam.h b/drivers/net/wireless/realtek/rtw89/cam.h
index 3134ebf08825..8fd2d776408e 100644
--- a/drivers/net/wireless/realtek/rtw89/cam.h
+++ b/drivers/net/wireless/realtek/rtw89/cam.h
@@ -578,4 +578,9 @@  int rtw89_cam_sec_key_del(struct rtw89_dev *rtwdev,
 void rtw89_cam_bssid_changed(struct rtw89_dev *rtwdev,
 			     struct rtw89_vif_link *rtwvif_link);
 void rtw89_cam_reset_keys(struct rtw89_dev *rtwdev);
+int rtw89_cam_attach_link_sec_cam(struct rtw89_dev *rtwdev,
+				  struct rtw89_vif_link *rtwvif_link,
+				  struct rtw89_sta_link *rtwsta_link,
+				  u8 sec_cam_idx);
+
 #endif
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index b8f617c5a67a..9b511d2d31cb 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -3359,6 +3359,8 @@  struct rtw89_sec_cam_entry {
 	u8 spp_mode : 1;
 	/* 256 bits */
 	u8 key[32];
+
+	struct ieee80211_key_conf *key_conf;
 };
 
 struct rtw89_sta_link {
@@ -5720,6 +5722,8 @@  struct rtw89_sta {
 	struct rtw89_ampdu_params ampdu_params[IEEE80211_NUM_TIDS];
 	DECLARE_BITMAP(ampdu_map, IEEE80211_NUM_TIDS);
 
+	DECLARE_BITMAP(pairwise_sec_cam_map, RTW89_MAX_SEC_CAM_NUM);
+
 	u8 links_inst_valid_num;
 	DECLARE_BITMAP(links_inst_map, __RTW89_MLD_MAX_LINK_NUM);
 	struct rtw89_sta_link *links[IEEE80211_MLD_MAX_NUM_LINKS];
diff --git a/drivers/net/wireless/realtek/rtw89/mac80211.c b/drivers/net/wireless/realtek/rtw89/mac80211.c
index 5e31d206bb11..8d1f9517949b 100644
--- a/drivers/net/wireless/realtek/rtw89/mac80211.c
+++ b/drivers/net/wireless/realtek/rtw89/mac80211.c
@@ -509,6 +509,7 @@  static int __rtw89_ops_sta_add(struct rtw89_dev *rtwdev,
 		rtw89_core_txq_init(rtwdev, sta->txq[i]);
 
 	skb_queue_head_init(&rtwsta->roc_queue);
+	bitmap_zero(rtwsta->pairwise_sec_cam_map, RTW89_MAX_SEC_CAM_NUM);
 
 	rtwsta_link = rtw89_sta_set_link(rtwsta, sta->deflink.link_id);
 	if (!rtwsta_link) {
@@ -1654,6 +1655,7 @@  static int __rtw89_ops_set_sta_links(struct rtw89_dev *rtwdev,
 	struct rtw89_vif_link *rtwvif_link;
 	struct rtw89_sta_link *rtwsta_link;
 	unsigned int link_id;
+	u8 sec_cam_idx;
 	int ret;
 
 	for_each_set_bit(link_id, &set_links, IEEE80211_MLD_MAX_NUM_LINKS) {
@@ -1680,6 +1682,20 @@  static int __rtw89_ops_set_sta_links(struct rtw89_dev *rtwdev,
 		}
 
 		__rtw89_ops_bss_link_assoc(rtwdev, rtwvif_link);
+
+		for_each_set_bit(sec_cam_idx, rtwsta->pairwise_sec_cam_map,
+				 RTW89_MAX_SEC_CAM_NUM) {
+			ret = rtw89_cam_attach_link_sec_cam(rtwdev,
+							    rtwvif_link,
+							    rtwsta_link,
+							    sec_cam_idx);
+			if (ret) {
+				rtw89_err(rtwdev,
+					  "%s: failed to apply pairwise key (link id %u)\n",
+					  __func__, link_id);
+				return ret;
+			}
+		}
 	}
 
 	return 0;