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Tue, 4 Jun 2024 05:54:29 GMT Received: from bqiang-SFF.qca.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 3 Jun 2024 22:54:28 -0700 From: Baochen Qiang To: CC: , Subject: [PATCH v4 7/8] wifi: ath12k: support GTK rekey offload Date: Tue, 4 Jun 2024 13:54:06 +0800 Message-ID: <20240604055407.12506-8-quic_bqiang@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240604055407.12506-1-quic_bqiang@quicinc.com> References: <20240604055407.12506-1-quic_bqiang@quicinc.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 6qDQde-kqzyHBwAOirZdT5xPywqf8zlz X-Proofpoint-GUID: 6qDQde-kqzyHBwAOirZdT5xPywqf8zlz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-06-04_02,2024-05-30_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 mlxscore=0 adultscore=0 impostorscore=0 bulkscore=0 spamscore=0 phishscore=0 clxscore=1015 mlxlogscore=999 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406040045 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: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4 Signed-off-by: Baochen Qiang --- drivers/net/wireless/ath/ath12k/core.h | 8 ++ drivers/net/wireless/ath/ath12k/mac.c | 38 +++++++++ drivers/net/wireless/ath/ath12k/wmi.c | 112 +++++++++++++++++++++++++ drivers/net/wireless/ath/ath12k/wmi.h | 39 +++++++++ drivers/net/wireless/ath/ath12k/wow.c | 46 +++++++++- 5 files changed, 242 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h index 34c54295a35e..3508bc717195 100644 --- a/drivers/net/wireless/ath/ath12k/core.h +++ b/drivers/net/wireless/ath/ath12k/core.h @@ -230,6 +230,13 @@ struct ath12k_vif_cache { u32 bss_conf_changed; }; +struct ath12k_rekey_data { + u8 kck[NL80211_KCK_LEN]; + u8 kek[NL80211_KCK_LEN]; + u64 replay_ctr; + bool enable_offload; +}; + struct ath12k_vif { u32 vdev_id; enum wmi_vdev_type vdev_type; @@ -286,6 +293,7 @@ struct ath12k_vif { u32 punct_bitmap; bool ps; struct ath12k_vif_cache *cache; + struct ath12k_rekey_data rekey_data; }; struct ath12k_vif_iter { diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c index e400a9a29e0e..7d7757ff5e51 100644 --- a/drivers/net/wireless/ath/ath12k/mac.c +++ b/drivers/net/wireless/ath/ath12k/mac.c @@ -2837,6 +2837,7 @@ static void ath12k_bss_assoc(struct ath12k *ar, } arvif->is_up = true; + arvif->rekey_data.enable_offload = false; ath12k_dbg(ar->ab, ATH12K_DBG_MAC, "mac vdev %d up (associated) bssid %pM aid %d\n", @@ -2884,6 +2885,8 @@ static void ath12k_bss_disassoc(struct ath12k *ar, arvif->is_up = false; + memset(&arvif->rekey_data, 0, sizeof(arvif->rekey_data)); + cancel_delayed_work(&arvif->connection_loss_work); } @@ -8506,6 +8509,40 @@ static int ath12k_mac_op_remain_on_channel(struct ieee80211_hw *hw, return ret; } +static void ath12k_mac_op_set_rekey_data(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct cfg80211_gtk_rekey_data *data) +{ + struct ath12k_vif *arvif = ath12k_vif_to_arvif(vif); + struct ath12k_rekey_data *rekey_data = &arvif->rekey_data; + struct ath12k_hw *ah = ath12k_hw_to_ah(hw); + struct ath12k *ar = ath12k_ah_to_ar(ah, 0); + + ath12k_dbg(ar->ab, ATH12K_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; + + ath12k_dbg_dump(ar->ab, ATH12K_DBG_MAC, "kck", NULL, + rekey_data->kck, NL80211_KCK_LEN); + ath12k_dbg_dump(ar->ab, ATH12K_DBG_MAC, "kek", NULL, + rekey_data->kck, NL80211_KEK_LEN); + ath12k_dbg_dump(ar->ab, ATH12K_DBG_MAC, "replay ctr", NULL, + &rekey_data->replay_ctr, sizeof(rekey_data->replay_ctr)); + + mutex_unlock(&ar->conf_mutex); +} + static const struct ieee80211_ops ath12k_ops = { .tx = ath12k_mac_op_tx, .wake_tx_queue = ieee80211_handle_wake_tx_queue, @@ -8521,6 +8558,7 @@ static const struct ieee80211_ops ath12k_ops = { .hw_scan = ath12k_mac_op_hw_scan, .cancel_hw_scan = ath12k_mac_op_cancel_hw_scan, .set_key = ath12k_mac_op_set_key, + .set_rekey_data = ath12k_mac_op_set_rekey_data, .sta_state = ath12k_mac_op_sta_state, .sta_set_txpwr = ath12k_mac_op_sta_set_txpwr, .sta_rc_update = ath12k_mac_op_sta_rc_update, diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c index aa920af4310a..877ba231830b 100644 --- a/drivers/net/wireless/ath/ath12k/wmi.c +++ b/drivers/net/wireless/ath/ath12k/wmi.c @@ -7090,6 +7090,56 @@ static void ath12k_wmi_event_wow_wakeup_host(struct ath12k_base *ab, struct sk_b complete(&ab->wow.wakeup_completed); } +static void ath12k_wmi_gtk_offload_status_event(struct ath12k_base *ab, + struct sk_buff *skb) +{ + const struct wmi_gtk_offload_status_event *ev; + struct ath12k_vif *arvif; + __be64 replay_ctr_be; + u64 replay_ctr; + const void **tb; + int ret; + + tb = ath12k_wmi_tlv_parse_alloc(ab, skb, GFP_ATOMIC); + if (IS_ERR(tb)) { + ret = PTR_ERR(tb); + ath12k_warn(ab, "failed to parse tlv: %d\n", ret); + return; + } + + ev = tb[WMI_TAG_GTK_OFFLOAD_STATUS_EVENT]; + if (!ev) { + ath12k_warn(ab, "failed to fetch gtk offload status ev"); + kfree(tb); + return; + } + + rcu_read_lock(); + arvif = ath12k_mac_get_arvif_by_vdev_id(ab, le32_to_cpu(ev->vdev_id)); + if (!arvif) { + rcu_read_unlock(); + ath12k_warn(ab, "failed to get arvif for vdev_id:%d\n", + le32_to_cpu(ev->vdev_id)); + kfree(tb); + return; + } + + replay_ctr = le64_to_cpu(ev->replay_ctr); + arvif->rekey_data.replay_ctr = replay_ctr; + ath12k_dbg(ab, ATH12K_DBG_WMI, "wmi gtk offload event refresh_cnt %d replay_ctr %llu\n", + le32_to_cpu(ev->refresh_cnt), 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_ATOMIC); + + rcu_read_unlock(); + + kfree(tb); +} + static void ath12k_wmi_op_rx(struct ath12k_base *ab, struct sk_buff *skb) { struct wmi_cmd_hdr *cmd_hdr; @@ -7213,6 +7263,9 @@ static void ath12k_wmi_op_rx(struct ath12k_base *ab, struct sk_buff *skb) case WMI_WOW_WAKEUP_HOST_EVENTID: ath12k_wmi_event_wow_wakeup_host(ab, skb); break; + case WMI_GTK_OFFLOAD_STATUS_EVENTID: + ath12k_wmi_gtk_offload_status_event(ab, skb); + break; /* TODO: Add remaining events */ default: ath12k_dbg(ab, ATH12K_DBG_WMI, "Unknown eventid: 0x%x\n", id); @@ -7929,3 +7982,62 @@ int ath12k_wmi_arp_ns_offload(struct ath12k *ar, return ath12k_wmi_cmd_send(ar->wmi, skb, WMI_SET_ARP_NS_OFFLOAD_CMDID); } + +int ath12k_wmi_gtk_rekey_offload(struct ath12k *ar, + struct ath12k_vif *arvif, bool enable) +{ + struct ath12k_rekey_data *rekey_data = &arvif->rekey_data; + struct wmi_gtk_rekey_offload_cmd *cmd; + struct sk_buff *skb; + __le64 replay_ctr; + int len; + + len = sizeof(*cmd); + skb = ath12k_wmi_alloc_skb(ar->wmi->wmi_ab, len); + if (!skb) + return -ENOMEM; + + cmd = (struct wmi_gtk_rekey_offload_cmd *)skb->data; + cmd->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_GTK_OFFLOAD_CMD, sizeof(*cmd)); + cmd->vdev_id = cpu_to_le32(arvif->vdev_id); + + if (enable) { + cmd->flags = cpu_to_le32(GTK_OFFLOAD_ENABLE_OPCODE); + + /* the length in rekey_data and cmd is equal */ + memcpy(cmd->kck, rekey_data->kck, sizeof(cmd->kck)); + memcpy(cmd->kek, rekey_data->kek, sizeof(cmd->kek)); + + replay_ctr = cpu_to_le64(rekey_data->replay_ctr); + memcpy(cmd->replay_ctr, &replay_ctr, + sizeof(replay_ctr)); + } else { + cmd->flags = cpu_to_le32(GTK_OFFLOAD_DISABLE_OPCODE); + } + + ath12k_dbg(ar->ab, ATH12K_DBG_WMI, "offload gtk rekey vdev: %d %d\n", + arvif->vdev_id, enable); + return ath12k_wmi_cmd_send(ar->wmi, skb, WMI_GTK_OFFLOAD_CMDID); +} + +int ath12k_wmi_gtk_rekey_getinfo(struct ath12k *ar, + struct ath12k_vif *arvif) +{ + struct wmi_gtk_rekey_offload_cmd *cmd; + struct sk_buff *skb; + int len; + + len = sizeof(*cmd); + skb = ath12k_wmi_alloc_skb(ar->wmi->wmi_ab, len); + if (!skb) + return -ENOMEM; + + cmd = (struct wmi_gtk_rekey_offload_cmd *)skb->data; + cmd->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_GTK_OFFLOAD_CMD, sizeof(*cmd)); + cmd->vdev_id = cpu_to_le32(arvif->vdev_id); + cmd->flags = cpu_to_le32(GTK_OFFLOAD_REQUEST_STATUS_OPCODE); + + ath12k_dbg(ar->ab, ATH12K_DBG_WMI, "get gtk rekey vdev_id: %d\n", + arvif->vdev_id); + return ath12k_wmi_cmd_send(ar->wmi, skb, WMI_GTK_OFFLOAD_CMDID); +} diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h index 0542d599d33d..0188dc78139b 100644 --- a/drivers/net/wireless/ath/ath12k/wmi.h +++ b/drivers/net/wireless/ath/ath12k/wmi.h @@ -5377,6 +5377,41 @@ 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_gtk_offload_status_event { + __le32 vdev_id; + __le32 flags; + __le32 refresh_cnt; + __le64 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 { + __le32 tlv_header; + __le32 vdev_id; + __le32 flags; + u8 kek[GTK_OFFLOAD_KEK_BYTES]; + u8 kck[GTK_OFFLOAD_KCK_BYTES]; + u8 replay_ctr[GTK_REPLAY_COUNTER_BYTES]; +} __packed; + void ath12k_wmi_init_qcn9274(struct ath12k_base *ab, struct ath12k_wmi_resource_config_arg *config); void ath12k_wmi_init_wcn7850(struct ath12k_base *ab, @@ -5546,5 +5581,9 @@ int ath12k_wmi_arp_ns_offload(struct ath12k *ar, struct ath12k_vif *arvif, struct wmi_arp_ns_offload_arg *offload, bool enable); +int ath12k_wmi_gtk_rekey_offload(struct ath12k *ar, + struct ath12k_vif *arvif, bool enable); +int ath12k_wmi_gtk_rekey_getinfo(struct ath12k *ar, + struct ath12k_vif *arvif); #endif diff --git a/drivers/net/wireless/ath/ath12k/wow.c b/drivers/net/wireless/ath/ath12k/wow.c index 39092f71b6a2..85fe6a9dab37 100644 --- a/drivers/net/wireless/ath/ath12k/wow.c +++ b/drivers/net/wireless/ath/ath12k/wow.c @@ -21,7 +21,9 @@ static const struct wiphy_wowlan_support ath12k_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, @@ -754,6 +756,41 @@ static int ath12k_wow_arp_ns_offload(struct ath12k *ar, bool enable) return 0; } +static int ath12k_gtk_rekey_offload(struct ath12k *ar, bool enable) +{ + struct ath12k_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 = ath12k_wmi_gtk_rekey_getinfo(ar, arvif); + if (ret) { + ath12k_warn(ar->ab, "failed to request rekey info vdev %i, ret %d\n", + arvif->vdev_id, ret); + return ret; + } + } + + ret = ath12k_wmi_gtk_rekey_offload(ar, arvif, enable); + + if (ret) { + ath12k_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 ath12k_wow_protocol_offload(struct ath12k *ar, bool enable) { int ret; @@ -765,6 +802,13 @@ static int ath12k_wow_protocol_offload(struct ath12k *ar, bool enable) return ret; } + ret = ath12k_gtk_rekey_offload(ar, enable); + if (ret) { + ath12k_warn(ar->ab, "failed to offload gtk rekey %d %d\n", + enable, ret); + return ret; + } + return 0; } -- 2.25.1