iwlwifi: Move the core suspend function to iwl-agn-lib

The core suspend function is part of agn, iwl_mac80211 should only
handle mac80211 I/F operations.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 357 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
index 6465983fef34..0bc962217351 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
@@ -984,3 +984,360 @@ void iwlagn_remove_notification(struct iwl_priv *priv,
         list_del(&wait_entry->list);
         spin_unlock_bh(&priv->notif_wait_lock);
 }
+
+#ifdef CONFIG_PM_SLEEP
+static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
+{
+        int i;
+
+        for (i = 0; i < IWLAGN_P1K_SIZE; i++)
+                out[i] = cpu_to_le16(p1k[i]);
+}
+
+struct wowlan_key_data {
+        struct iwl_rxon_context *ctx;
+        struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
+        struct iwlagn_wowlan_tkip_params_cmd *tkip;
+        const u8 *bssid;
+        bool error, use_rsc_tsc, use_tkip;
+};
+
+
+static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
+                               struct ieee80211_vif *vif,
+                               struct ieee80211_sta *sta,
+                               struct ieee80211_key_conf *key,
+                               void *_data)
+{
+        struct iwl_priv *priv = hw->priv;
+        struct wowlan_key_data *data = _data;
+        struct iwl_rxon_context *ctx = data->ctx;
+        struct aes_sc *aes_sc, *aes_tx_sc = NULL;
+        struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
+        struct iwlagn_p1k_cache *rx_p1ks;
+        u8 *rx_mic_key;
+        struct ieee80211_key_seq seq;
+        u32 cur_rx_iv32 = 0;
+        u16 p1k[IWLAGN_P1K_SIZE];
+        int ret, i;
+
+        mutex_lock(&priv->shrd->mutex);
+
+        if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
+             key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
+             !sta && !ctx->key_mapping_keys)
+                ret = iwl_set_default_wep_key(priv, ctx, key);
+        else
+                ret = iwl_set_dynamic_key(priv, ctx, key, sta);
+
+        if (ret) {
+                IWL_ERR(priv, "Error setting key during suspend!\n");
+                data->error = true;
+        }
+
+        switch (key->cipher) {
+        case WLAN_CIPHER_SUITE_TKIP:
+                if (sta) {
+                        tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
+                        tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
+
+                        rx_p1ks = data->tkip->rx_uni;
+
+                        ieee80211_get_key_tx_seq(key, &seq);
+                        tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
+                        tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
+
+                        ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
+                        iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);
+
+                        memcpy(data->tkip->mic_keys.tx,
+                               &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
+                               IWLAGN_MIC_KEY_SIZE);
+
+                        rx_mic_key = data->tkip->mic_keys.rx_unicast;
+                } else {
+                        tkip_sc =
+                                data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
+                        rx_p1ks = data->tkip->rx_multi;
+                        rx_mic_key = data->tkip->mic_keys.rx_mcast;
+                }
+
+                /*
+                 * For non-QoS this relies on the fact that both the uCode and
+                 * mac80211 use TID 0 (as they need to to avoid replay attacks)
+                 * for checking the IV in the frames.
+                 */
+                for (i = 0; i < IWLAGN_NUM_RSC; i++) {
+                        ieee80211_get_key_rx_seq(key, i, &seq);
+                        tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
+                        tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
+                        /* wrapping isn't allowed, AP must rekey */
+                        if (seq.tkip.iv32 > cur_rx_iv32)
+                                cur_rx_iv32 = seq.tkip.iv32;
+                }
+
+                ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
+                iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
+                ieee80211_get_tkip_rx_p1k(key, data->bssid,
+                                          cur_rx_iv32 + 1, p1k);
+                iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);
+
+                memcpy(rx_mic_key,
+                       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
+                       IWLAGN_MIC_KEY_SIZE);
+
+                data->use_tkip = true;
+                data->use_rsc_tsc = true;
+                break;
+        case WLAN_CIPHER_SUITE_CCMP:
+                if (sta) {
+                        u8 *pn = seq.ccmp.pn;
+
+                        aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
+                        aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
+
+                        ieee80211_get_key_tx_seq(key, &seq);
+                        aes_tx_sc->pn = cpu_to_le64(
+                                        (u64)pn[5] |
+                                        ((u64)pn[4] << 8) |
+                                        ((u64)pn[3] << 16) |
+                                        ((u64)pn[2] << 24) |
+                                        ((u64)pn[1] << 32) |
+                                        ((u64)pn[0] << 40));
+                } else
+                        aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
+
+                /*
+                 * For non-QoS this relies on the fact that both the uCode and
+                 * mac80211 use TID 0 for checking the IV in the frames.
+                 */
+                for (i = 0; i < IWLAGN_NUM_RSC; i++) {
+                        u8 *pn = seq.ccmp.pn;
+
+                        ieee80211_get_key_rx_seq(key, i, &seq);
+                        aes_sc->pn = cpu_to_le64(
+                                        (u64)pn[5] |
+                                        ((u64)pn[4] << 8) |
+                                        ((u64)pn[3] << 16) |
+                                        ((u64)pn[2] << 24) |
+                                        ((u64)pn[1] << 32) |
+                                        ((u64)pn[0] << 40));
+                }
+                data->use_rsc_tsc = true;
+                break;
+        }
+
+        mutex_unlock(&priv->shrd->mutex);
+}
+
+int iwlagn_send_patterns(struct iwl_priv *priv,
+                        struct cfg80211_wowlan *wowlan)
+{
+        struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
+        struct iwl_host_cmd cmd = {
+                .id = REPLY_WOWLAN_PATTERNS,
+                .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
+                .flags = CMD_SYNC,
+        };
+        int i, err;
+
+        if (!wowlan->n_patterns)
+                return 0;
+
+        cmd.len[0] = sizeof(*pattern_cmd) +
+                wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);
+
+        pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
+        if (!pattern_cmd)
+                return -ENOMEM;
+
+        pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
+
+        for (i = 0; i < wowlan->n_patterns; i++) {
+                int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
+
+                memcpy(&pattern_cmd->patterns[i].mask,
+                        wowlan->patterns[i].mask, mask_len);
+                memcpy(&pattern_cmd->patterns[i].pattern,
+                        wowlan->patterns[i].pattern,
+                        wowlan->patterns[i].pattern_len);
+                pattern_cmd->patterns[i].mask_size = mask_len;
+                pattern_cmd->patterns[i].pattern_size =
+                        wowlan->patterns[i].pattern_len;
+        }
+
+        cmd.data[0] = pattern_cmd;
+        err = iwl_trans_send_cmd(trans(priv), &cmd);
+        kfree(pattern_cmd);
+        return err;
+}
+
+int iwlagn_suspend(struct iwl_priv *priv,
+                struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
+{
+        struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
+        struct iwl_rxon_cmd rxon;
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
+        struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
+        struct iwlagn_d3_config_cmd d3_cfg_cmd = {};
+        struct wowlan_key_data key_data = {
+                .ctx = ctx,
+                .bssid = ctx->active.bssid_addr,
+                .use_rsc_tsc = false,
+                .tkip = &tkip_cmd,
+                .use_tkip = false,
+        };
+        int ret, i;
+        u16 seq;
+
+        key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
+        if (!key_data.rsc_tsc)
+                return -ENOMEM;
+
+        memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));
+
+        /*
+         * We know the last used seqno, and the uCode expects to know that
+         * one, it will increment before TX.
+         */
+        seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
+        wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);
+
+        /*
+         * For QoS counters, we store the one to use next, so subtract 0x10
+         * since the uCode will add 0x10 before using the value.
+         */
+        for (i = 0; i < 8; i++) {
+                seq = priv->shrd->tid_data[IWL_AP_ID][i].seq_number;
+                seq -= 0x10;
+                wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
+        }
+
+        if (wowlan->disconnect)
+                wakeup_filter_cmd.enabled |=
+                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
+                                    IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
+        if (wowlan->magic_pkt)
+                wakeup_filter_cmd.enabled |=
+                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
+        if (wowlan->gtk_rekey_failure)
+                wakeup_filter_cmd.enabled |=
+                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
+        if (wowlan->eap_identity_req)
+                wakeup_filter_cmd.enabled |=
+                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
+        if (wowlan->four_way_handshake)
+                wakeup_filter_cmd.enabled |=
+                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
+        if (wowlan->n_patterns)
+                wakeup_filter_cmd.enabled |=
+                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);
+
+        if (wowlan->rfkill_release)
+                d3_cfg_cmd.wakeup_flags |=
+                        cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);
+
+        iwl_scan_cancel_timeout(priv, 200);
+
+        memcpy(&rxon, &ctx->active, sizeof(rxon));
+
+        iwl_trans_stop_device(trans(priv));
+
+        priv->shrd->wowlan = true;
+
+        ret = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
+        if (ret)
+                goto out;
+
+        /* now configure WoWLAN ucode */
+        ret = iwl_alive_start(priv);
+        if (ret)
+                goto out;
+
+        memcpy(&ctx->staging, &rxon, sizeof(rxon));
+        ret = iwlagn_commit_rxon(priv, ctx);
+        if (ret)
+                goto out;
+
+        ret = iwl_power_update_mode(priv, true);
+        if (ret)
+                goto out;
+
+        if (!iwlagn_mod_params.sw_crypto) {
+                /* mark all keys clear */
+                priv->ucode_key_table = 0;
+                ctx->key_mapping_keys = 0;
+
+                /*
+                 * This needs to be unlocked due to lock ordering
+                 * constraints. Since we're in the suspend path
+                 * that isn't really a problem though.
+                 */
+                mutex_unlock(&priv->shrd->mutex);
+                ieee80211_iter_keys(priv->hw, ctx->vif,
+                                    iwlagn_wowlan_program_keys,
+                                    &key_data);
+                mutex_lock(&priv->shrd->mutex);
+                if (key_data.error) {
+                        ret = -EIO;
+                        goto out;
+                }
+
+                if (key_data.use_rsc_tsc) {
+                        struct iwl_host_cmd rsc_tsc_cmd = {
+                                .id = REPLY_WOWLAN_TSC_RSC_PARAMS,
+                                .flags = CMD_SYNC,
+                                .data[0] = key_data.rsc_tsc,
+                                .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
+                                .len[0] = sizeof(key_data.rsc_tsc),
+                        };
+
+                        ret = iwl_trans_send_cmd(trans(priv), &rsc_tsc_cmd);
+                        if (ret)
+                                goto out;
+                }
+
+                if (key_data.use_tkip) {
+                        ret = iwl_trans_send_cmd_pdu(trans(priv),
+                                                 REPLY_WOWLAN_TKIP_PARAMS,
+                                                 CMD_SYNC, sizeof(tkip_cmd),
+                                                 &tkip_cmd);
+                        if (ret)
+                                goto out;
+                }
+
+                if (priv->have_rekey_data) {
+                        memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
+                        memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
+                        kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
+                        memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
+                        kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
+                        kek_kck_cmd.replay_ctr = priv->replay_ctr;
+
+                        ret = iwl_trans_send_cmd_pdu(trans(priv),
+                                                 REPLY_WOWLAN_KEK_KCK_MATERIAL,
+                                                 CMD_SYNC, sizeof(kek_kck_cmd),
+                                                 &kek_kck_cmd);
+                        if (ret)
+                                goto out;
+                }
+        }
+
+        ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_D3_CONFIG, CMD_SYNC,
+                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
+        if (ret)
+                goto out;
+
+        ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_WOWLAN_WAKEUP_FILTER,
+                                 CMD_SYNC, sizeof(wakeup_filter_cmd),
+                                 &wakeup_filter_cmd);
+        if (ret)
+                goto out;
+
+        ret = iwlagn_send_patterns(priv, wowlan);
+ out:
+        kfree(key_data.rsc_tsc);
+        return ret;
+}
+#endif