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lede/package/kernel/mac80211/patches/ath11k/0198-ath11k-support-GTK-rekey-offload.patch
lean 66d19a4e36 mac80211: bump to 5.15.33-1
2022-07-08 12:44:37 +08:00

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From a16d9b50cfbaf112401b8e5ccfa852709f498cd4 Mon Sep 17 00:00:00 2001
From: Carl Huang <quic_cjhuang@quicinc.com>
Date: Mon, 14 Mar 2022 07:18:16 +0200
Subject: [PATCH] ath11k: support GTK rekey offload
Host sets GTK related info to firmware before WoW is enabled, and
gets rekey replay_count and then disables GTK rekey when WoW quits.
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Carl Huang <quic_cjhuang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/1644308006-22784-7-git-send-email-quic_cjhuang@quicinc.com
---
drivers/net/wireless/ath/ath11k/core.h | 8 ++
drivers/net/wireless/ath/ath11k/mac.c | 37 ++++++++
drivers/net/wireless/ath/ath11k/wmi.c | 119 +++++++++++++++++++++++++
drivers/net/wireless/ath/ath11k/wmi.h | 49 ++++++++++
drivers/net/wireless/ath/ath11k/wow.c | 46 +++++++++-
5 files changed, 258 insertions(+), 1 deletion(-)
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -230,6 +230,13 @@ struct ath11k_arp_ns_offload {
u8 mac_addr[ETH_ALEN];
};
+struct ath11k_rekey_data {
+ u8 kck[NL80211_KCK_LEN];
+ u8 kek[NL80211_KCK_LEN];
+ u64 replay_ctr;
+ bool enable_offload;
+};
+
struct ath11k_vif {
u32 vdev_id;
enum wmi_vdev_type vdev_type;
@@ -282,6 +289,7 @@ struct ath11k_vif {
bool do_not_send_tmpl;
struct ieee80211_chanctx_conf chanctx;
struct ath11k_arp_ns_offload arp_ns_offload;
+ struct ath11k_rekey_data rekey_data;
#ifdef CPTCFG_ATH11K_DEBUGFS
struct dentry *debugfs_twt;
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -2757,6 +2757,7 @@ static void ath11k_bss_assoc(struct ieee
}
arvif->is_up = true;
+ arvif->rekey_data.enable_offload = false;
ath11k_dbg(ar->ab, ATH11K_DBG_MAC,
"mac vdev %d up (associated) bssid %pM aid %d\n",
@@ -2814,6 +2815,8 @@ static void ath11k_bss_disassoc(struct i
arvif->is_up = false;
+ memset(&arvif->rekey_data, 0, sizeof(arvif->rekey_data));
+
cancel_delayed_work_sync(&arvif->connection_loss_work);
}
@@ -8200,6 +8203,39 @@ generate:
ath11k_generate_ns_mc_addr(ar, offload);
}
+static void ath11k_mac_op_set_rekey_data(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct cfg80211_gtk_rekey_data *data)
+{
+ struct ath11k *ar = hw->priv;
+ struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
+ struct ath11k_rekey_data *rekey_data = &arvif->rekey_data;
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac set rekey data vdev %d\n",
+ arvif->vdev_id);
+
+ mutex_lock(&ar->conf_mutex);
+
+ memcpy(rekey_data->kck, data->kck, NL80211_KCK_LEN);
+ memcpy(rekey_data->kek, data->kek, NL80211_KEK_LEN);
+
+ /* The supplicant works on big-endian, the firmware expects it on
+ * little endian.
+ */
+ rekey_data->replay_ctr = get_unaligned_be64(data->replay_ctr);
+
+ arvif->rekey_data.enable_offload = true;
+
+ ath11k_dbg_dump(ar->ab, ATH11K_DBG_MAC, "kck", NULL,
+ rekey_data->kck, NL80211_KCK_LEN);
+ ath11k_dbg_dump(ar->ab, ATH11K_DBG_MAC, "kek", NULL,
+ rekey_data->kck, NL80211_KEK_LEN);
+ ath11k_dbg_dump(ar->ab, ATH11K_DBG_MAC, "replay ctr", NULL,
+ &rekey_data->replay_ctr, sizeof(rekey_data->replay_ctr));
+
+ mutex_unlock(&ar->conf_mutex);
+}
+
static const struct ieee80211_ops ath11k_ops = {
.tx = ath11k_mac_op_tx,
.start = ath11k_mac_op_start,
@@ -8214,6 +8250,7 @@ static const struct ieee80211_ops ath11k
.hw_scan = ath11k_mac_op_hw_scan,
.cancel_hw_scan = ath11k_mac_op_cancel_hw_scan,
.set_key = ath11k_mac_op_set_key,
+ .set_rekey_data = ath11k_mac_op_set_rekey_data,
.sta_state = ath11k_mac_op_sta_state,
.sta_set_4addr = ath11k_mac_op_sta_set_4addr,
.sta_set_txpwr = ath11k_mac_op_sta_set_txpwr,
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -7765,6 +7765,56 @@ exit:
kfree(tb);
}
+static void ath11k_wmi_gtk_offload_status_event(struct ath11k_base *ab,
+ struct sk_buff *skb)
+{
+ const void **tb;
+ const struct wmi_gtk_offload_status_event *ev;
+ struct ath11k_vif *arvif;
+ __be64 replay_ctr_be;
+ u64 replay_ctr;
+ int ret;
+
+ tb = ath11k_wmi_tlv_parse_alloc(ab, skb->data, skb->len, GFP_ATOMIC);
+ if (IS_ERR(tb)) {
+ ret = PTR_ERR(tb);
+ ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
+ return;
+ }
+
+ ev = tb[WMI_TAG_GTK_OFFLOAD_STATUS_EVENT];
+ if (!ev) {
+ ath11k_warn(ab, "failed to fetch gtk offload status ev");
+ kfree(tb);
+ return;
+ }
+
+ arvif = ath11k_mac_get_arvif_by_vdev_id(ab, ev->vdev_id);
+ if (!arvif) {
+ ath11k_warn(ab, "failed to get arvif for vdev_id:%d\n",
+ ev->vdev_id);
+ kfree(tb);
+ return;
+ }
+
+ ath11k_dbg(ab, ATH11K_DBG_WMI, "wmi gtk offload event refresh_cnt %d\n",
+ ev->refresh_cnt);
+ ath11k_dbg_dump(ab, ATH11K_DBG_WMI, "replay_cnt",
+ NULL, ev->replay_ctr.counter, GTK_REPLAY_COUNTER_BYTES);
+
+ replay_ctr = ev->replay_ctr.word1;
+ replay_ctr = (replay_ctr << 32) | ev->replay_ctr.word0;
+ arvif->rekey_data.replay_ctr = replay_ctr;
+
+ /* supplicant expects big-endian replay counter */
+ replay_ctr_be = cpu_to_be64(replay_ctr);
+
+ ieee80211_gtk_rekey_notify(arvif->vif, arvif->bssid,
+ (void *)&replay_ctr_be, GFP_KERNEL);
+
+ kfree(tb);
+}
+
static void ath11k_wmi_tlv_op_rx(struct ath11k_base *ab, struct sk_buff *skb)
{
struct wmi_cmd_hdr *cmd_hdr;
@@ -7896,6 +7946,9 @@ static void ath11k_wmi_tlv_op_rx(struct
case WMI_DIAG_EVENTID:
ath11k_wmi_diag_event(ab, skb);
break;
+ case WMI_GTK_OFFLOAD_STATUS_EVENTID:
+ ath11k_wmi_gtk_offload_status_event(ab, skb);
+ break;
/* TODO: Add remaining events */
default:
ath11k_dbg(ab, ATH11K_DBG_WMI, "Unknown eventid: 0x%x\n", id);
@@ -8735,3 +8788,69 @@ int ath11k_wmi_arp_ns_offload(struct ath
return ath11k_wmi_cmd_send(ar->wmi, skb, WMI_SET_ARP_NS_OFFLOAD_CMDID);
}
+
+int ath11k_wmi_gtk_rekey_offload(struct ath11k *ar,
+ struct ath11k_vif *arvif, bool enable)
+{
+ struct wmi_gtk_rekey_offload_cmd *cmd;
+ struct ath11k_rekey_data *rekey_data = &arvif->rekey_data;
+ int len;
+ struct sk_buff *skb;
+ __le64 replay_ctr;
+
+ len = sizeof(*cmd);
+ skb = ath11k_wmi_alloc_skb(ar->wmi->wmi_ab, len);
+ if (!skb)
+ return -ENOMEM;
+
+ cmd = (struct wmi_gtk_rekey_offload_cmd *)skb->data;
+ cmd->tlv_header = FIELD_PREP(WMI_TLV_TAG, WMI_TAG_GTK_OFFLOAD_CMD) |
+ FIELD_PREP(WMI_TLV_LEN, sizeof(*cmd) - TLV_HDR_SIZE);
+
+ cmd->vdev_id = arvif->vdev_id;
+
+ if (enable) {
+ cmd->flags = GTK_OFFLOAD_ENABLE_OPCODE;
+
+ /* the length in rekey_data and cmd is equal */
+ memcpy(cmd->kck, rekey_data->kck, sizeof(cmd->kck));
+ ath11k_ce_byte_swap(cmd->kck, GTK_OFFLOAD_KEK_BYTES);
+ memcpy(cmd->kek, rekey_data->kek, sizeof(cmd->kek));
+ ath11k_ce_byte_swap(cmd->kek, GTK_OFFLOAD_KEK_BYTES);
+
+ replay_ctr = cpu_to_le64(rekey_data->replay_ctr);
+ memcpy(cmd->replay_ctr, &replay_ctr,
+ sizeof(replay_ctr));
+ ath11k_ce_byte_swap(cmd->replay_ctr, GTK_REPLAY_COUNTER_BYTES);
+ } else {
+ cmd->flags = GTK_OFFLOAD_DISABLE_OPCODE;
+ }
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_WMI, "offload gtk rekey vdev: %d %d\n",
+ arvif->vdev_id, enable);
+ return ath11k_wmi_cmd_send(ar->wmi, skb, WMI_GTK_OFFLOAD_CMDID);
+}
+
+int ath11k_wmi_gtk_rekey_getinfo(struct ath11k *ar,
+ struct ath11k_vif *arvif)
+{
+ struct wmi_gtk_rekey_offload_cmd *cmd;
+ int len;
+ struct sk_buff *skb;
+
+ len = sizeof(*cmd);
+ skb = ath11k_wmi_alloc_skb(ar->wmi->wmi_ab, len);
+ if (!skb)
+ return -ENOMEM;
+
+ cmd = (struct wmi_gtk_rekey_offload_cmd *)skb->data;
+ cmd->tlv_header = FIELD_PREP(WMI_TLV_TAG, WMI_TAG_GTK_OFFLOAD_CMD) |
+ FIELD_PREP(WMI_TLV_LEN, sizeof(*cmd) - TLV_HDR_SIZE);
+
+ cmd->vdev_id = arvif->vdev_id;
+ cmd->flags = GTK_OFFLOAD_REQUEST_STATUS_OPCODE;
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_WMI, "get gtk rekey vdev_id: %d\n",
+ arvif->vdev_id);
+ return ath11k_wmi_cmd_send(ar->wmi, skb, WMI_GTK_OFFLOAD_CMDID);
+}
--- a/drivers/net/wireless/ath/ath11k/wmi.h
+++ b/drivers/net/wireless/ath/ath11k/wmi.h
@@ -5840,6 +5840,51 @@ struct wmi_set_arp_ns_offload_cmd {
*/
} __packed;
+#define GTK_OFFLOAD_OPCODE_MASK 0xFF000000
+#define GTK_OFFLOAD_ENABLE_OPCODE 0x01000000
+#define GTK_OFFLOAD_DISABLE_OPCODE 0x02000000
+#define GTK_OFFLOAD_REQUEST_STATUS_OPCODE 0x04000000
+
+#define GTK_OFFLOAD_KEK_BYTES 16
+#define GTK_OFFLOAD_KCK_BYTES 16
+#define GTK_REPLAY_COUNTER_BYTES 8
+#define WMI_MAX_KEY_LEN 32
+#define IGTK_PN_SIZE 6
+
+struct wmi_replayc_cnt {
+ union {
+ u8 counter[GTK_REPLAY_COUNTER_BYTES];
+ struct {
+ u32 word0;
+ u32 word1;
+ } __packed;
+ } __packed;
+} __packed;
+
+struct wmi_gtk_offload_status_event {
+ u32 vdev_id;
+ u32 flags;
+ u32 refresh_cnt;
+ struct wmi_replayc_cnt replay_ctr;
+ u8 igtk_key_index;
+ u8 igtk_key_length;
+ u8 igtk_key_rsc[IGTK_PN_SIZE];
+ u8 igtk_key[WMI_MAX_KEY_LEN];
+ u8 gtk_key_index;
+ u8 gtk_key_length;
+ u8 gtk_key_rsc[GTK_REPLAY_COUNTER_BYTES];
+ u8 gtk_key[WMI_MAX_KEY_LEN];
+} __packed;
+
+struct wmi_gtk_rekey_offload_cmd {
+ u32 tlv_header;
+ u32 vdev_id;
+ u32 flags;
+ u8 kek[GTK_OFFLOAD_KEK_BYTES];
+ u8 kck[GTK_OFFLOAD_KCK_BYTES];
+ u8 replay_ctr[GTK_REPLAY_COUNTER_BYTES];
+} __packed;
+
int ath11k_wmi_cmd_send(struct ath11k_pdev_wmi *wmi, struct sk_buff *skb,
u32 cmd_id);
struct sk_buff *ath11k_wmi_alloc_skb(struct ath11k_wmi_base *wmi_sc, u32 len);
@@ -6014,5 +6059,9 @@ int ath11k_wmi_hw_data_filter_cmd(struct
u32 filter_bitmap, bool enable);
int ath11k_wmi_arp_ns_offload(struct ath11k *ar,
struct ath11k_vif *arvif, bool enable);
+int ath11k_wmi_gtk_rekey_offload(struct ath11k *ar,
+ struct ath11k_vif *arvif, bool enable);
+int ath11k_wmi_gtk_rekey_getinfo(struct ath11k *ar,
+ struct ath11k_vif *arvif);
#endif
--- a/drivers/net/wireless/ath/ath11k/wow.c
+++ b/drivers/net/wireless/ath/ath11k/wow.c
@@ -17,7 +17,9 @@
static const struct wiphy_wowlan_support ath11k_wowlan_support = {
.flags = WIPHY_WOWLAN_DISCONNECT |
- WIPHY_WOWLAN_MAGIC_PKT,
+ WIPHY_WOWLAN_MAGIC_PKT |
+ WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
+ WIPHY_WOWLAN_GTK_REKEY_FAILURE,
.pattern_min_len = WOW_MIN_PATTERN_SIZE,
.pattern_max_len = WOW_MAX_PATTERN_SIZE,
.max_pkt_offset = WOW_MAX_PKT_OFFSET,
@@ -582,6 +584,41 @@ static int ath11k_wow_arp_ns_offload(str
return 0;
}
+static int ath11k_gtk_rekey_offload(struct ath11k *ar, bool enable)
+{
+ struct ath11k_vif *arvif;
+ int ret;
+
+ lockdep_assert_held(&ar->conf_mutex);
+
+ list_for_each_entry(arvif, &ar->arvifs, list) {
+ if (arvif->vdev_type != WMI_VDEV_TYPE_STA ||
+ !arvif->is_up ||
+ !arvif->rekey_data.enable_offload)
+ continue;
+
+ /* get rekey info before disable rekey offload */
+ if (!enable) {
+ ret = ath11k_wmi_gtk_rekey_getinfo(ar, arvif);
+ if (ret) {
+ ath11k_warn(ar->ab, "failed to request rekey info vdev %i, ret %d\n",
+ arvif->vdev_id, ret);
+ return ret;
+ }
+ }
+
+ ret = ath11k_wmi_gtk_rekey_offload(ar, arvif, enable);
+
+ if (ret) {
+ ath11k_warn(ar->ab, "failed to offload gtk reky vdev %i: enable %d, ret %d\n",
+ arvif->vdev_id, enable, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
static int ath11k_wow_protocol_offload(struct ath11k *ar, bool enable)
{
int ret;
@@ -592,6 +629,13 @@ static int ath11k_wow_protocol_offload(s
enable, ret);
return ret;
}
+
+ ret = ath11k_gtk_rekey_offload(ar, enable);
+ if (ret) {
+ ath11k_warn(ar->ab, "failed to offload gtk rekey %d %d\n",
+ enable, ret);
+ return ret;
+ }
return 0;
}
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