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Sun, 27 Sep 2026 14:03:35 -0700 (PDT) From: Sean Wang To: nbd@nbd.name Cc: linux-wireless@vger.kernel.org, linux-mediatek@lists.infradead.org, yu-ching.liu@mediatek.com, jenhao.yang@mediatek.com, posh.sun@mediatek.com, Chengwei Yu , Sean Wang Subject: [PATCH 06/23] wifi: mt76: mt7925: implement NAN key management MCU command Date: Sun, 27 Sep 2026 16:02:48 -0500 Message-ID: <20260927210306.737669-7-sean.wang@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260927210306.737669-1-sean.wang@kernel.org> References: <20260927210306.737669-1-sean.wang@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260927_140859_653100_B86036AD X-CRM114-Status: GOOD ( 15.57 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Chengwei Yu Add mt7925_nan_manage_key_cmd() and mt7925_nan_key_mgmt_tlv() to install and remove NAN group and pairwise keys via NAN_UNI_CMD_KEY_MANAGEMENT. The TLV builder covers all firmware key types: NM-TK, ND-TK (unicast), TX/RX GTK (multicast data) and TX/RX IGTK/BIGTK (multicast management). Follows the same skb + mt76_connac_mcu_add_tlv() pattern as other NAN commands (mt7925_nan_enable(), mt7925_nan_change_configure()) rather than hand-assembling a packed struct, so it composes naturally with the existing NAN command helpers. Key material is grouped into struct mt7925_nan_key_info so callers pass one pointer instead of five arguments; init/key_exist firmware flags are hardcoded 1/0 since every real caller uses the same values. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: Chengwei Yu --- .../net/wireless/mediatek/mt76/mt7925/nan.c | 122 ++++++++++++++++++ .../net/wireless/mediatek/mt76/mt7925/nan.h | 72 +++++++++++ 2 files changed, 194 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/nan.c b/drivers/net/wireless/mediatek/mt76/mt7925/nan.c index 73e45be8b40e..0579501207eb 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/nan.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/nan.c @@ -897,6 +897,128 @@ void mt7925_nan_stop_mac_randomization(struct ieee80211_vif *vif) cancel_delayed_work_sync(&mvif->nan.mac_rand_work); } +static int +mt7925_nan_key_mgmt_tlv(struct sk_buff *skb, + enum mt7925_nan_key_operation key_op, + enum mt7925_nan_key_type key_type, + u16 wtbl_entry, + const u8 *local_addr, + const u8 *peer_addr, + const struct mt7925_nan_key_info *key) +{ + struct mt7925_nan_key_mgmt_tlv *key_mgmt_tlv = NULL; + struct tlv *tlv = NULL; + + if (!skb) + return -EINVAL; + + tlv = mt76_connac_mcu_add_tlv(skb, NAN_UNI_CMD_KEY_MANAGEMENT, + sizeof(struct mt7925_nan_key_mgmt_tlv)); + if (!tlv) + return -ENOMEM; + + key_mgmt_tlv = (struct mt7925_nan_key_mgmt_tlv *)tlv; + key_mgmt_tlv->op = (u8)key_op; + key_mgmt_tlv->key_type = (u8)key_type; + key_mgmt_tlv->wtbl_idx = cpu_to_le16(wtbl_entry); + key_mgmt_tlv->init = 1; + key_mgmt_tlv->key_exist = 0; + key_mgmt_tlv->is_nmi_tk = 0; + + memcpy(key_mgmt_tlv->local_addr, local_addr, ETH_ALEN); + memcpy(key_mgmt_tlv->peer_addr, peer_addr, ETH_ALEN); + + switch (key_type) { + case NAN_KEY_TYPE_NMI_CXT_MGMT_KEY: + key_mgmt_tlv->nmi_key_idx = 0; + key_mgmt_tlv->is_nmi_tk = true; + break; + case NAN_KEY_TYPE_MC_TX_KEY: + case NAN_KEY_TYPE_MC_MGMT_TX_KEY: + /* TX GTK/IGTK/BIGTK: NDI-indexed slot; NDC ID not yet tracked */ + key_mgmt_tlv->ndi_idx = 0; + break; + case NAN_KEY_TYPE_MC_RX_KEY: + case NAN_KEY_TYPE_MC_MGMT_RX_KEY: + key_mgmt_tlv->mc_rx_idx = (u8)wtbl_entry; + break; + default: + return -EINVAL; + } + + if (key_op == NAN_KEY_OP_SET_KEY) { + key_mgmt_tlv->algorithm_id = key->algo_id; + key_mgmt_tlv->key_id = key->key_id; + key_mgmt_tlv->key_len = key->key_len; + + if (key_type == NAN_KEY_TYPE_MC_MGMT_RX_KEY && key->pn) { + memcpy(key_mgmt_tlv->key_rsc, key->pn, + min_t(size_t, NAN_PACKET_NUMBER_LEN, + sizeof(key_mgmt_tlv->key_rsc))); + } + + if (key->key_data) { + memcpy(key_mgmt_tlv->key_material, key->key_data, + min_t(size_t, key->key_len, + sizeof(key_mgmt_tlv->key_material))); + } + } + + return 0; +} + +/** + * mt7925_nan_manage_key_cmd - Install/remove a NAN group or pairwise key + * @dev: mt792x device pointer + * @key_op: NAN_KEY_OP_SET_KEY or NAN_KEY_OP_CLS_KEY + * @key_type: which NAN key slot this targets (enum mt7925_nan_key_type) + * @wtbl_entry: WTBL index the key is bound to (WTBL_RESERVED_ENTRY invalid) + * @local_addr: local MAC address for this key context + * @peer_addr: peer MAC address for this key context + * @key: key material; key->key_data required for NAN_KEY_OP_SET_KEY + * + * There are no other callers yet; NAN group key installation added by a + * later change calls into this single command path. + */ +int +mt7925_nan_manage_key_cmd(struct mt792x_dev *dev, + enum mt7925_nan_key_operation key_op, + enum mt7925_nan_key_type key_type, + u16 wtbl_entry, + const u8 *local_addr, + const u8 *peer_addr, + const struct mt7925_nan_key_info *key) +{ + struct mt76_dev *mdev = &dev->mt76; + struct mt7925_nan_common_hdr *hdr = NULL; + struct sk_buff *skb = NULL; + int ret; + + if (!key || !local_addr || !peer_addr || + key_type >= NAN_KEY_TYPE_NUM || + wtbl_entry == WTBL_RESERVED_ENTRY || + (key_op == NAN_KEY_OP_SET_KEY && !key->key_data)) + return -EINVAL; + + skb = mt76_mcu_msg_alloc(mdev, NULL, + sizeof(struct mt7925_nan_common_hdr) + + sizeof(struct mt7925_nan_key_mgmt_tlv)); + if (!skb) + return -ENOMEM; + + hdr = (struct mt7925_nan_common_hdr *)skb_put(skb, sizeof(*hdr)); + memset(hdr, 0, sizeof(*hdr)); + + ret = mt7925_nan_key_mgmt_tlv(skb, key_op, key_type, wtbl_entry, + local_addr, peer_addr, key); + if (ret) { + dev_kfree_skb(skb); + return ret; + } + + return mt76_mcu_skb_send_msg(mdev, skb, MCU_UNI_CMD(NAN), true); +} + static int mt7925_nan_avail_ctrl_tlv(struct sk_buff *skb, struct ieee80211_vif *vif) { diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/nan.h b/drivers/net/wireless/mediatek/mt76/mt7925/nan.h index 3a14ec384e4f..f15a16b773bb 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/nan.h +++ b/drivers/net/wireless/mediatek/mt76/mt7925/nan.h @@ -109,6 +109,24 @@ enum nan_disc_event_type { NAN_EVENT_ID_JOINED_CLUSTER = 2, }; +enum mt7925_nan_key_operation { + NAN_KEY_OP_SET_KEY, + NAN_KEY_OP_CLS_KEY, +}; + +enum mt7925_nan_key_type { + NAN_KEY_TYPE_NMI_CXT_MGMT_KEY, /* NM-TK: NAN Management pairwise key */ + NAN_KEY_TYPE_ND_TK, /* ND-TK: NAN Data pairwise key */ + NAN_KEY_TYPE_MC_TX_KEY, /* TX GTK (multicast data) */ + NAN_KEY_TYPE_MC_RX_KEY, /* RX GTK (multicast data) */ + NAN_KEY_TYPE_MC_MGMT_TX_KEY, /* TX IGTK/BIGTK (multicast mgmt) */ + NAN_KEY_TYPE_MC_MGMT_RX_KEY, /* RX IGTK/BIGTK (multicast mgmt) */ + NAN_KEY_TYPE_NUM, +}; + +#define WTBL_RESERVED_ENTRY 0xFFFF +#define NAN_PACKET_NUMBER_LEN 6 + /* bit indices into mt792x_dev->nan_deferred_pending, set from the atomic * MCU-event RX path and consumed by mt7925_nan_deferred_work() */ @@ -478,6 +496,35 @@ struct mt7925_nan_update_phy_setting_tlv { struct mt7925_nan_phy_setting phy_5g; } __packed __aligned(4); +struct mt7925_nan_key_mgmt_tlv { + __le16 tag; + __le16 len; + + u8 op; /* enum mt7925_nan_key_operation */ + u8 key_type; /* enum mt7925_nan_key_type */ + __le16 wtbl_idx; + u8 init; + u8 key_exist; + u8 is_nmi_tk; + u8 reserved0; + + u8 local_addr[ETH_ALEN]; + u8 peer_addr[ETH_ALEN]; + + union { + u8 nmi_key_idx; + u8 ndi_idx; + u8 mc_rx_idx; + }; + u8 algorithm_id; + u8 key_id; + u8 key_len; + + u8 key_rsc[NAN_PACKET_NUMBER_LEN]; + u8 reserved1[2]; + u8 key_material[32]; +} __packed __aligned(4); + /* NAN Low Power Control Command */ struct mt7925_nan_lowpower_ctrl_tlv { __le16 tag; @@ -528,6 +575,31 @@ void mt7925_nan_stop_mac_randomization(struct ieee80211_vif *vif); int mt7925_nan_send_lowpower_ctrl_cmd(struct mt792x_dev *dev, bool enable); +/** + * struct mt7925_nan_key_info - key material for mt7925_nan_manage_key_cmd + * @algo_id: firmware cipher algorithm ID (from mt7925_mcu_get_cipher()) + * @key_id: key index (1-2 for GTK, 4-7 for IGTK/BIGTK) + * @key_len: key material length in bytes (16 or 32) + * @key_data: key bytes; must be non-NULL for SET_KEY operations + * @pn: 6-byte packet number / RSC; only used for MC_MGMT_RX_KEY, + * pass NULL for all other key types + */ +struct mt7925_nan_key_info { + u8 algo_id; + u8 key_id; + u8 key_len; + const u8 *key_data; + const u8 *pn; +}; + +int mt7925_nan_manage_key_cmd(struct mt792x_dev *dev, + enum mt7925_nan_key_operation key_op, + enum mt7925_nan_key_type key_type, + u16 wtbl_entry, + const u8 *local_addr, + const u8 *peer_addr, + const struct mt7925_nan_key_info *key); + void mt7925_nan_local_sched_changed(struct mt792x_dev *dev, struct ieee80211_vif *vif); -- 2.43.0