Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next

Conflicts:
	drivers/net/wireless/iwlwifi/iwl-eeprom.c

1 files changed, 1633 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
new file mode 100644
index 000000000000..599e8b41f5a8
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
@@ -0,0 +1,1633 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
+ *
+ * Portions of this file are derived from the ipw3945 project, as well
+ * as portions of the ieee80211 subsystem header files.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ *****************************************************************************/
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+
+#include <net/ieee80211_radiotap.h>
+#include <net/mac80211.h>
+
+#include <asm/div64.h>
+
+#include "iwl-io.h"
+#include "iwl-trans.h"
+#include "iwl-op-mode.h"
+#include "iwl-modparams.h"
+
+#include "dev.h"
+#include "calib.h"
+#include "agn.h"
+
+/*****************************************************************************
+ *
+ * mac80211 entry point functions
+ *
+ *****************************************************************************/
+
+static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
+        {
+                .max = 1,
+                .types = BIT(NL80211_IFTYPE_STATION),
+        },
+        {
+                .max = 1,
+                .types = BIT(NL80211_IFTYPE_AP),
+        },
+};
+
+static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
+        {
+                .max = 2,
+                .types = BIT(NL80211_IFTYPE_STATION),
+        },
+};
+
+static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
+        {
+                .max = 1,
+                .types = BIT(NL80211_IFTYPE_STATION),
+        },
+        {
+                .max = 1,
+                .types = BIT(NL80211_IFTYPE_P2P_GO) |
+                         BIT(NL80211_IFTYPE_AP),
+        },
+};
+
+static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
+        {
+                .max = 2,
+                .types = BIT(NL80211_IFTYPE_STATION),
+        },
+        {
+                .max = 1,
+                .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
+        },
+};
+
+static const struct ieee80211_iface_combination
+iwlagn_iface_combinations_dualmode[] = {
+        { .num_different_channels = 1,
+          .max_interfaces = 2,
+          .beacon_int_infra_match = true,
+          .limits = iwlagn_sta_ap_limits,
+          .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
+        },
+        { .num_different_channels = 1,
+          .max_interfaces = 2,
+          .limits = iwlagn_2sta_limits,
+          .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
+        },
+};
+
+static const struct ieee80211_iface_combination
+iwlagn_iface_combinations_p2p[] = {
+        { .num_different_channels = 1,
+          .max_interfaces = 2,
+          .beacon_int_infra_match = true,
+          .limits = iwlagn_p2p_sta_go_limits,
+          .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
+        },
+        { .num_different_channels = 1,
+          .max_interfaces = 2,
+          .limits = iwlagn_p2p_2sta_limits,
+          .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
+        },
+};
+
+/*
+ * Not a mac80211 entry point function, but it fits in with all the
+ * other mac80211 functions grouped here.
+ */
+int iwlagn_mac_setup_register(struct iwl_priv *priv,
+                              const struct iwl_ucode_capabilities *capa)
+{
+        int ret;
+        struct ieee80211_hw *hw = priv->hw;
+        struct iwl_rxon_context *ctx;
+
+        hw->rate_control_algorithm = "iwl-agn-rs";
+
+        /* Tell mac80211 our characteristics */
+        hw->flags = IEEE80211_HW_SIGNAL_DBM |
+                    IEEE80211_HW_AMPDU_AGGREGATION |
+                    IEEE80211_HW_NEED_DTIM_PERIOD |
+                    IEEE80211_HW_SPECTRUM_MGMT |
+                    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
+                    IEEE80211_HW_QUEUE_CONTROL |
+                    IEEE80211_HW_SUPPORTS_PS |
+                    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
+                    IEEE80211_HW_WANT_MONITOR_VIF |
+                    IEEE80211_HW_SCAN_WHILE_IDLE;
+
+        hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
+        hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
+
+        /*
+         * Including the following line will crash some AP's.  This
+         * workaround removes the stimulus which causes the crash until
+         * the AP software can be fixed.
+        hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
+         */
+
+        if (priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE)
+                hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
+                             IEEE80211_HW_SUPPORTS_STATIC_SMPS;
+
+#ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
+        /* enable 11w if the uCode advertise */
+        if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
+#endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
+                hw->flags |= IEEE80211_HW_MFP_CAPABLE;
+
+        hw->sta_data_size = sizeof(struct iwl_station_priv);
+        hw->vif_data_size = sizeof(struct iwl_vif_priv);
+
+        for_each_context(priv, ctx) {
+                hw->wiphy->interface_modes |= ctx->interface_modes;
+                hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
+        }
+
+        BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
+
+        if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
+                hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
+                hw->wiphy->n_iface_combinations =
+                        ARRAY_SIZE(iwlagn_iface_combinations_p2p);
+        } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
+                hw->wiphy->iface_combinations =
+                        iwlagn_iface_combinations_dualmode;
+                hw->wiphy->n_iface_combinations =
+                        ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
+        }
+
+        hw->wiphy->max_remain_on_channel_duration = 1000;
+
+        hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
+                            WIPHY_FLAG_DISABLE_BEACON_HINTS |
+                            WIPHY_FLAG_IBSS_RSN;
+
+#ifdef CONFIG_PM_SLEEP
+        if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
+            priv->trans->ops->wowlan_suspend &&
+            device_can_wakeup(priv->trans->dev)) {
+                hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
+                                          WIPHY_WOWLAN_DISCONNECT |
+                                          WIPHY_WOWLAN_EAP_IDENTITY_REQ |
+                                          WIPHY_WOWLAN_RFKILL_RELEASE;
+                if (!iwlwifi_mod_params.sw_crypto)
+                        hw->wiphy->wowlan.flags |=
+                                WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
+                                WIPHY_WOWLAN_GTK_REKEY_FAILURE;
+
+                hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
+                hw->wiphy->wowlan.pattern_min_len =
+                                        IWLAGN_WOWLAN_MIN_PATTERN_LEN;
+                hw->wiphy->wowlan.pattern_max_len =
+                                        IWLAGN_WOWLAN_MAX_PATTERN_LEN;
+        }
+#endif
+
+        if (iwlwifi_mod_params.power_save)
+                hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
+        else
+                hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
+
+        hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
+        /* we create the 802.11 header and a max-length SSID element */
+        hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
+
+        /*
+         * We don't use all queues: 4 and 9 are unused and any
+         * aggregation queue gets mapped down to the AC queue.
+         */
+        hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
+
+        hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
+
+        if (priv->eeprom_data->bands[IEEE80211_BAND_2GHZ].n_channels)
+                priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
+                        &priv->eeprom_data->bands[IEEE80211_BAND_2GHZ];
+        if (priv->eeprom_data->bands[IEEE80211_BAND_5GHZ].n_channels)
+                priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
+                        &priv->eeprom_data->bands[IEEE80211_BAND_5GHZ];
+
+        hw->wiphy->hw_version = priv->trans->hw_id;
+
+        iwl_leds_init(priv);
+
+        ret = ieee80211_register_hw(priv->hw);
+        if (ret) {
+                IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
+                iwl_leds_exit(priv);
+                return ret;
+        }
+        priv->mac80211_registered = 1;
+
+        return 0;
+}
+
+void iwlagn_mac_unregister(struct iwl_priv *priv)
+{
+        if (!priv->mac80211_registered)
+                return;
+        iwl_leds_exit(priv);
+        ieee80211_unregister_hw(priv->hw);
+        priv->mac80211_registered = 0;
+}
+
+static int __iwl_up(struct iwl_priv *priv)
+{
+        struct iwl_rxon_context *ctx;
+        int ret;
+
+        lockdep_assert_held(&priv->mutex);
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
+                IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
+                return -EIO;
+        }
+
+        for_each_context(priv, ctx) {
+                ret = iwlagn_alloc_bcast_station(priv, ctx);
+                if (ret) {
+                        iwl_dealloc_bcast_stations(priv);
+                        return ret;
+                }
+        }
+
+        ret = iwl_run_init_ucode(priv);
+        if (ret) {
+                IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
+                goto error;
+        }
+
+        ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
+        if (ret) {
+                IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
+                goto error;
+        }
+
+        ret = iwl_alive_start(priv);
+        if (ret)
+                goto error;
+        return 0;
+
+ error:
+        set_bit(STATUS_EXIT_PENDING, &priv->status);
+        iwl_down(priv);
+        clear_bit(STATUS_EXIT_PENDING, &priv->status);
+
+        IWL_ERR(priv, "Unable to initialize device.\n");
+        return ret;
+}
+
+static int iwlagn_mac_start(struct ieee80211_hw *hw)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        int ret;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        /* we should be verifying the device is ready to be opened */
+        mutex_lock(&priv->mutex);
+        ret = __iwl_up(priv);
+        mutex_unlock(&priv->mutex);
+        if (ret)
+                return ret;
+
+        IWL_DEBUG_INFO(priv, "Start UP work done.\n");
+
+        /* Now we should be done, and the READY bit should be set. */
+        if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
+                ret = -EIO;
+
+        iwlagn_led_enable(priv);
+
+        priv->is_open = 1;
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+        return 0;
+}
+
+static void iwlagn_mac_stop(struct ieee80211_hw *hw)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        if (!priv->is_open)
+                return;
+
+        priv->is_open = 0;
+
+        mutex_lock(&priv->mutex);
+        iwl_down(priv);
+        mutex_unlock(&priv->mutex);
+
+        iwl_cancel_deferred_work(priv);
+
+        flush_workqueue(priv->workqueue);
+
+        /* User space software may expect getting rfkill changes
+         * even if interface is down, trans->down will leave the RF
+         * kill interrupt enabled
+         */
+        iwl_trans_stop_hw(priv->trans, false);
+
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
+                                      struct ieee80211_vif *vif,
+                                      struct cfg80211_gtk_rekey_data *data)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        if (iwlwifi_mod_params.sw_crypto)
+                return;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+
+        if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
+                goto out;
+
+        memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
+        memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
+        priv->replay_ctr =
+                cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
+        priv->have_rekey_data = true;
+
+ out:
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
+                              struct cfg80211_wowlan *wowlan)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        int ret;
+
+        if (WARN_ON(!wowlan))
+                return -EINVAL;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+
+        /* Don't attempt WoWLAN when not associated, tear down instead. */
+        if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
+            !iwl_is_associated_ctx(ctx)) {
+                ret = 1;
+                goto out;
+        }
+
+        ret = iwlagn_suspend(priv, wowlan);
+        if (ret)
+                goto error;
+
+        iwl_trans_wowlan_suspend(priv->trans);
+
+        goto out;
+
+ error:
+        priv->wowlan = false;
+        iwlagn_prepare_restart(priv);
+        ieee80211_restart_hw(priv->hw);
+ out:
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        return ret;
+}
+
+static int iwlagn_mac_resume(struct ieee80211_hw *hw)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        struct ieee80211_vif *vif;
+        unsigned long flags;
+        u32 base, status = 0xffffffff;
+        int ret = -EIO;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+
+        iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
+                          CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
+
+        base = priv->device_pointers.error_event_table;
+        if (iwlagn_hw_valid_rtc_data_addr(base)) {
+                spin_lock_irqsave(&priv->trans->reg_lock, flags);
+                ret = iwl_grab_nic_access_silent(priv->trans);
+                if (likely(ret == 0)) {
+                        iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
+                        status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
+                        iwl_release_nic_access(priv->trans);
+                }
+                spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+                if (ret == 0) {
+                        const struct fw_img *img;
+
+                        img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
+                        if (!priv->wowlan_sram) {
+                                priv->wowlan_sram =
+                                   kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
+                                                GFP_KERNEL);
+                        }
+
+                        if (priv->wowlan_sram)
+                                _iwl_read_targ_mem_words(
+                                      priv->trans, 0x800000,
+                                      priv->wowlan_sram,
+                                      img->sec[IWL_UCODE_SECTION_DATA].len / 4);
+                }
+#endif
+        }
+
+        /* we'll clear ctx->vif during iwlagn_prepare_restart() */
+        vif = ctx->vif;
+
+        priv->wowlan = false;
+
+        iwlagn_prepare_restart(priv);
+
+        memset((void *)&ctx->active, 0, sizeof(ctx->active));
+        iwl_connection_init_rx_config(priv, ctx);
+        iwlagn_set_rxon_chain(priv, ctx);
+
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        ieee80211_resume_disconnect(vif);
+
+        return 1;
+}
+
+static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        device_set_wakeup_enable(priv->trans->dev, enabled);
+}
+#endif
+
+static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
+                     ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
+
+        if (iwlagn_tx_skb(priv, skb))
+                dev_kfree_skb_any(skb);
+}
+
+static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
+                                       struct ieee80211_vif *vif,
+                                       struct ieee80211_key_conf *keyconf,
+                                       struct ieee80211_sta *sta,
+                                       u32 iv32, u16 *phase1key)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
+}
+
+static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+                              struct ieee80211_vif *vif,
+                              struct ieee80211_sta *sta,
+                              struct ieee80211_key_conf *key)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+        struct iwl_rxon_context *ctx = vif_priv->ctx;
+        int ret;
+        bool is_default_wep_key = false;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        if (iwlwifi_mod_params.sw_crypto) {
+                IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
+                return -EOPNOTSUPP;
+        }
+
+        switch (key->cipher) {
+        case WLAN_CIPHER_SUITE_TKIP:
+                key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+                /* fall through */
+        case WLAN_CIPHER_SUITE_CCMP:
+                key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+                break;
+        default:
+                break;
+        }
+
+        /*
+         * We could program these keys into the hardware as well, but we
+         * don't expect much multicast traffic in IBSS and having keys
+         * for more stations is probably more useful.
+         *
+         * Mark key TX-only and return 0.
+         */
+        if (vif->type == NL80211_IFTYPE_ADHOC &&
+            !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
+                key->hw_key_idx = WEP_INVALID_OFFSET;
+                return 0;
+        }
+
+        /* If they key was TX-only, accept deletion */
+        if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
+                return 0;
+
+        mutex_lock(&priv->mutex);
+        iwl_scan_cancel_timeout(priv, 100);
+
+        BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
+
+        /*
+         * If we are getting WEP group key and we didn't receive any key mapping
+         * so far, we are in legacy wep mode (group key only), otherwise we are
+         * in 1X mode.
+         * In legacy wep mode, we use another host command to the uCode.
+         */
+        if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
+             key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
+                if (cmd == SET_KEY)
+                        is_default_wep_key = !ctx->key_mapping_keys;
+                else
+                        is_default_wep_key =
+                                key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
+        }
+
+
+        switch (cmd) {
+        case SET_KEY:
+                if (is_default_wep_key) {
+                        ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
+                        break;
+                }
+                ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
+                if (ret) {
+                        /*
+                         * can't add key for RX, but we don't need it
+                         * in the device for TX so still return 0
+                         */
+                        ret = 0;
+                        key->hw_key_idx = WEP_INVALID_OFFSET;
+                }
+
+                IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
+                break;
+        case DISABLE_KEY:
+                if (is_default_wep_key)
+                        ret = iwl_remove_default_wep_key(priv, ctx, key);
+                else
+                        ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
+
+                IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
+                break;
+        default:
+                ret = -EINVAL;
+        }
+
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        return ret;
+}
+
+static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
+                                   struct ieee80211_vif *vif,
+                                   enum ieee80211_ampdu_mlme_action action,
+                                   struct ieee80211_sta *sta, u16 tid, u16 *ssn,
+                                   u8 buf_size)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        int ret = -EINVAL;
+        struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
+
+        IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
+                     sta->addr, tid);
+
+        if (!(priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE))
+                return -EACCES;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+
+        switch (action) {
+        case IEEE80211_AMPDU_RX_START:
+                if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
+                        break;
+                IWL_DEBUG_HT(priv, "start Rx\n");
+                ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
+                break;
+        case IEEE80211_AMPDU_RX_STOP:
+                IWL_DEBUG_HT(priv, "stop Rx\n");
+                ret = iwl_sta_rx_agg_stop(priv, sta, tid);
+                break;
+        case IEEE80211_AMPDU_TX_START:
+                if (!priv->trans->ops->txq_enable)
+                        break;
+                if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
+                        break;
+                IWL_DEBUG_HT(priv, "start Tx\n");
+                ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
+                break;
+        case IEEE80211_AMPDU_TX_STOP:
+                IWL_DEBUG_HT(priv, "stop Tx\n");
+                ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
+                if ((ret == 0) && (priv->agg_tids_count > 0)) {
+                        priv->agg_tids_count--;
+                        IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
+                                     priv->agg_tids_count);
+                }
+                if (!priv->agg_tids_count &&
+                    priv->hw_params.use_rts_for_aggregation) {
+                        /*
+                         * switch off RTS/CTS if it was previously enabled
+                         */
+                        sta_priv->lq_sta.lq.general_params.flags &=
+                                ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
+                        iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
+                                        &sta_priv->lq_sta.lq, CMD_ASYNC, false);
+                }
+                break;
+        case IEEE80211_AMPDU_TX_OPERATIONAL:
+                ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
+                break;
+        }
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+        return ret;
+}
+
+static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif,
+                              struct ieee80211_sta *sta)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
+        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+        bool is_ap = vif->type == NL80211_IFTYPE_STATION;
+        int ret;
+        u8 sta_id;
+
+        IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
+                        sta->addr);
+        sta_priv->sta_id = IWL_INVALID_STATION;
+
+        atomic_set(&sta_priv->pending_frames, 0);
+        if (vif->type == NL80211_IFTYPE_AP)
+                sta_priv->client = true;
+
+        ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
+                                     is_ap, sta, &sta_id);
+        if (ret) {
+                IWL_ERR(priv, "Unable to add station %pM (%d)\n",
+                        sta->addr, ret);
+                /* Should we return success if return code is EEXIST ? */
+                return ret;
+        }
+
+        sta_priv->sta_id = sta_id;
+
+        return 0;
+}
+
+static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
+                                 struct ieee80211_vif *vif,
+                                 struct ieee80211_sta *sta)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
+        int ret;
+
+        IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
+
+        if (vif->type == NL80211_IFTYPE_STATION) {
+                /*
+                 * Station will be removed from device when the RXON
+                 * is set to unassociated -- just deactivate it here
+                 * to avoid re-programming it.
+                 */
+                ret = 0;
+                iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
+        } else {
+                ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
+                if (ret)
+                        IWL_DEBUG_QUIET_RFKILL(priv,
+                                "Error removing station %pM\n", sta->addr);
+        }
+        return ret;
+}
+
+static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
+                                struct ieee80211_vif *vif,
+                                struct ieee80211_sta *sta,
+                                enum ieee80211_sta_state old_state,
+                                enum ieee80211_sta_state new_state)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+        enum {
+                NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
+        } op = NONE;
+        int ret;
+
+        IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
+                           sta->addr, old_state, new_state);
+
+        mutex_lock(&priv->mutex);
+        if (vif->type == NL80211_IFTYPE_STATION) {
+                if (old_state == IEEE80211_STA_NOTEXIST &&
+                    new_state == IEEE80211_STA_NONE)
+                        op = ADD;
+                else if (old_state == IEEE80211_STA_NONE &&
+                         new_state == IEEE80211_STA_NOTEXIST)
+                        op = REMOVE;
+                else if (old_state == IEEE80211_STA_AUTH &&
+                         new_state == IEEE80211_STA_ASSOC)
+                        op = HT_RATE_INIT;
+        } else {
+                if (old_state == IEEE80211_STA_AUTH &&
+                    new_state == IEEE80211_STA_ASSOC)
+                        op = ADD_RATE_INIT;
+                else if (old_state == IEEE80211_STA_ASSOC &&
+                         new_state == IEEE80211_STA_AUTH)
+                        op = REMOVE;
+        }
+
+        switch (op) {
+        case ADD:
+                ret = iwlagn_mac_sta_add(hw, vif, sta);
+                break;
+        case REMOVE:
+                ret = iwlagn_mac_sta_remove(hw, vif, sta);
+                break;
+        case ADD_RATE_INIT:
+                ret = iwlagn_mac_sta_add(hw, vif, sta);
+                if (ret)
+                        break;
+                /* Initialize rate scaling */
+                IWL_DEBUG_INFO(priv,
+                               "Initializing rate scaling for station %pM\n",
+                               sta->addr);
+                iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
+                ret = 0;
+                break;
+        case HT_RATE_INIT:
+                /* Initialize rate scaling */
+                ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
+                if (ret)
+                        break;
+                IWL_DEBUG_INFO(priv,
+                               "Initializing rate scaling for station %pM\n",
+                               sta->addr);
+                iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
+                ret = 0;
+                break;
+        default:
+                ret = 0;
+                break;
+        }
+
+        /*
+         * mac80211 might WARN if we fail, but due the way we
+         * (badly) handle hard rfkill, we might fail here
+         */
+        if (iwl_is_rfkill(priv))
+                ret = 0;
+
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        return ret;
+}
+
+static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
+                                      struct ieee80211_channel_switch *ch_switch)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct ieee80211_conf *conf = &hw->conf;
+        struct ieee80211_channel *channel = ch_switch->channel;
+        struct iwl_ht_config *ht_conf = &priv->current_ht_config;
+        /*
+         * MULTI-FIXME
+         * When we add support for multiple interfaces, we need to
+         * revisit this. The channel switch command in the device
+         * only affects the BSS context, but what does that really
+         * mean? And what if we get a CSA on the second interface?
+         * This needs a lot of work.
+         */
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        u16 ch;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        mutex_lock(&priv->mutex);
+
+        if (iwl_is_rfkill(priv))
+                goto out;
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
+            test_bit(STATUS_SCANNING, &priv->status) ||
+            test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
+                goto out;
+
+        if (!iwl_is_associated_ctx(ctx))
+                goto out;
+
+        if (!priv->lib->set_channel_switch)
+                goto out;
+
+        ch = channel->hw_value;
+        if (le16_to_cpu(ctx->active.channel) == ch)
+                goto out;
+
+        priv->current_ht_config.smps = conf->smps_mode;
+
+        /* Configure HT40 channels */
+        ctx->ht.enabled = conf_is_ht(conf);
+        if (ctx->ht.enabled)
+                iwlagn_config_ht40(conf, ctx);
+        else
+                ctx->ht.is_40mhz = false;
+
+        if ((le16_to_cpu(ctx->staging.channel) != ch))
+                ctx->staging.flags = 0;
+
+        iwl_set_rxon_channel(priv, channel, ctx);
+        iwl_set_rxon_ht(priv, ht_conf);
+        iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
+
+        /*
+         * at this point, staging_rxon has the
+         * configuration for channel switch
+         */
+        set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
+        priv->switch_channel = cpu_to_le16(ch);
+        if (priv->lib->set_channel_switch(priv, ch_switch)) {
+                clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
+                priv->switch_channel = 0;
+                ieee80211_chswitch_done(ctx->vif, false);
+        }
+
+out:
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
+{
+        /*
+         * MULTI-FIXME
+         * See iwlagn_mac_channel_switch.
+         */
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+                return;
+
+        if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
+                ieee80211_chswitch_done(ctx->vif, is_success);
+}
+
+static void iwlagn_configure_filter(struct ieee80211_hw *hw,
+                                    unsigned int changed_flags,
+                                    unsigned int *total_flags,
+                                    u64 multicast)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        __le32 filter_or = 0, filter_nand = 0;
+        struct iwl_rxon_context *ctx;
+
+#define CHK(test, flag) do { \
+        if (*total_flags & (test))              \
+                filter_or |= (flag);            \
+        else                                    \
+                filter_nand |= (flag);          \
+        } while (0)
+
+        IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
+                        changed_flags, *total_flags);
+
+        CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
+        /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
+        CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
+        CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
+
+#undef CHK
+
+        mutex_lock(&priv->mutex);
+
+        for_each_context(priv, ctx) {
+                ctx->staging.filter_flags &= ~filter_nand;
+                ctx->staging.filter_flags |= filter_or;
+
+                /*
+                 * Not committing directly because hardware can perform a scan,
+                 * but we'll eventually commit the filter flags change anyway.
+                 */
+        }
+
+        mutex_unlock(&priv->mutex);
+
+        /*
+         * Receiving all multicast frames is always enabled by the
+         * default flags setup in iwl_connection_init_rx_config()
+         * since we currently do not support programming multicast
+         * filters into the device.
+         */
+        *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
+                        FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
+}
+
+static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        mutex_lock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
+                IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
+                goto done;
+        }
+        if (iwl_is_rfkill(priv)) {
+                IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
+                goto done;
+        }
+
+        /*
+         * mac80211 will not push any more frames for transmit
+         * until the flush is completed
+         */
+        if (drop) {
+                IWL_DEBUG_MAC80211(priv, "send flush command\n");
+                if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
+                        IWL_ERR(priv, "flush request fail\n");
+                        goto done;
+                }
+        }
+        IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
+        iwl_trans_wait_tx_queue_empty(priv->trans);
+done:
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
+                                     struct ieee80211_channel *channel,
+                                     enum nl80211_channel_type channel_type,
+                                     int duration)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
+        int err = 0;
+
+        if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
+                return -EOPNOTSUPP;
+
+        if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
+                return -EOPNOTSUPP;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+
+        if (test_bit(STATUS_SCAN_HW, &priv->status)) {
+                err = -EBUSY;
+                goto out;
+        }
+
+        priv->hw_roc_channel = channel;
+        priv->hw_roc_chantype = channel_type;
+        /* convert from ms to TU */
+        priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
+        priv->hw_roc_start_notified = false;
+        cancel_delayed_work(&priv->hw_roc_disable_work);
+
+        if (!ctx->is_active) {
+                static const struct iwl_qos_info default_qos_data = {
+                        .def_qos_parm = {
+                                .ac[0] = {
+                                        .cw_min = cpu_to_le16(3),
+                                        .cw_max = cpu_to_le16(7),
+                                        .aifsn = 2,
+                                        .edca_txop = cpu_to_le16(1504),
+                                },
+                                .ac[1] = {
+                                        .cw_min = cpu_to_le16(7),
+                                        .cw_max = cpu_to_le16(15),
+                                        .aifsn = 2,
+                                        .edca_txop = cpu_to_le16(3008),
+                                },
+                                .ac[2] = {
+                                        .cw_min = cpu_to_le16(15),
+                                        .cw_max = cpu_to_le16(1023),
+                                        .aifsn = 3,
+                                },
+                                .ac[3] = {
+                                        .cw_min = cpu_to_le16(15),
+                                        .cw_max = cpu_to_le16(1023),
+                                        .aifsn = 7,
+                                },
+                        },
+                };
+
+                ctx->is_active = true;
+                ctx->qos_data = default_qos_data;
+                ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
+                memcpy(ctx->staging.node_addr,
+                       priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
+                       ETH_ALEN);
+                memcpy(ctx->staging.bssid_addr,
+                       priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
+                       ETH_ALEN);
+                err = iwlagn_commit_rxon(priv, ctx);
+                if (err)
+                        goto out;
+                ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
+                                             RXON_FILTER_PROMISC_MSK |
+                                             RXON_FILTER_CTL2HOST_MSK;
+
+                err = iwlagn_commit_rxon(priv, ctx);
+                if (err) {
+                        iwlagn_disable_roc(priv);
+                        goto out;
+                }
+                priv->hw_roc_setup = true;
+        }
+
+        err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
+        if (err)
+                iwlagn_disable_roc(priv);
+
+ out:
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        return err;
+}
+
+static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
+                return -EOPNOTSUPP;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+        iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
+        iwlagn_disable_roc(priv);
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        return 0;
+}
+
+static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
+                                     enum ieee80211_rssi_event rssi_event)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+        mutex_lock(&priv->mutex);
+
+        if (priv->cfg->bt_params &&
+                        priv->cfg->bt_params->advanced_bt_coexist) {
+                if (rssi_event == RSSI_EVENT_LOW)
+                        priv->bt_enable_pspoll = true;
+                else if (rssi_event == RSSI_EVENT_HIGH)
+                        priv->bt_enable_pspoll = false;
+
+                iwlagn_send_advance_bt_config(priv);
+        } else {
+                IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
+                                "ignoring RSSI callback\n");
+        }
+
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
+                              struct ieee80211_sta *sta, bool set)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        queue_work(priv->workqueue, &priv->beacon_update);
+
+        return 0;
+}
+
+static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif, u16 queue,
+                              const struct ieee80211_tx_queue_params *params)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+        struct iwl_rxon_context *ctx = vif_priv->ctx;
+        int q;
+
+        if (WARN_ON(!ctx))
+                return -EINVAL;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        if (!iwl_is_ready_rf(priv)) {
+                IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
+                return -EIO;
+        }
+
+        if (queue >= AC_NUM) {
+                IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
+                return 0;
+        }
+
+        q = AC_NUM - 1 - queue;
+
+        mutex_lock(&priv->mutex);
+
+        ctx->qos_data.def_qos_parm.ac[q].cw_min =
+                cpu_to_le16(params->cw_min);
+        ctx->qos_data.def_qos_parm.ac[q].cw_max =
+                cpu_to_le16(params->cw_max);
+        ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
+        ctx->qos_data.def_qos_parm.ac[q].edca_txop =
+                        cpu_to_le16((params->txop * 32));
+
+        ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
+
+        mutex_unlock(&priv->mutex);
+
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+        return 0;
+}
+
+static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+
+        return priv->ibss_manager == IWL_IBSS_MANAGER;
+}
+
+static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
+{
+        iwl_connection_init_rx_config(priv, ctx);
+
+        iwlagn_set_rxon_chain(priv, ctx);
+
+        return iwlagn_commit_rxon(priv, ctx);
+}
+
+static int iwl_setup_interface(struct iwl_priv *priv,
+                               struct iwl_rxon_context *ctx)
+{
+        struct ieee80211_vif *vif = ctx->vif;
+        int err, ac;
+
+        lockdep_assert_held(&priv->mutex);
+
+        /*
+         * This variable will be correct only when there's just
+         * a single context, but all code using it is for hardware
+         * that supports only one context.
+         */
+        priv->iw_mode = vif->type;
+
+        ctx->is_active = true;
+
+        err = iwl_set_mode(priv, ctx);
+        if (err) {
+                if (!ctx->always_active)
+                        ctx->is_active = false;
+                return err;
+        }
+
+        if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
+            vif->type == NL80211_IFTYPE_ADHOC) {
+                /*
+                 * pretend to have high BT traffic as long as we
+                 * are operating in IBSS mode, as this will cause
+                 * the rate scaling etc. to behave as intended.
+                 */
+                priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
+        }
+
+        /* set up queue mappings */
+        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+                vif->hw_queue[ac] = ctx->ac_to_queue[ac];
+
+        if (vif->type == NL80211_IFTYPE_AP)
+                vif->cab_queue = ctx->mcast_queue;
+        else
+                vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
+
+        return 0;
+}
+
+static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
+                                    struct ieee80211_vif *vif)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+        struct iwl_rxon_context *tmp, *ctx = NULL;
+        int err;
+        enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
+        bool reset = false;
+
+        IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
+                           viftype, vif->addr);
+
+        cancel_delayed_work_sync(&priv->hw_roc_disable_work);
+
+        mutex_lock(&priv->mutex);
+
+        iwlagn_disable_roc(priv);
+
+        if (!iwl_is_ready_rf(priv)) {
+                IWL_WARN(priv, "Try to add interface when device not ready\n");
+                err = -EINVAL;
+                goto out;
+        }
+
+        for_each_context(priv, tmp) {
+                u32 possible_modes =
+                        tmp->interface_modes | tmp->exclusive_interface_modes;
+
+                if (tmp->vif) {
+                        /* On reset we need to add the same interface again */
+                        if (tmp->vif == vif) {
+                                reset = true;
+                                ctx = tmp;
+                                break;
+                        }
+
+                        /* check if this busy context is exclusive */
+                        if (tmp->exclusive_interface_modes &
+                                                BIT(tmp->vif->type)) {
+                                err = -EINVAL;
+                                goto out;
+                        }
+                        continue;
+                }
+
+                if (!(possible_modes & BIT(viftype)))
+                        continue;
+
+                /* have maybe usable context w/o interface */
+                ctx = tmp;
+                break;
+        }
+
+        if (!ctx) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
+        vif_priv->ctx = ctx;
+        ctx->vif = vif;
+
+        err = iwl_setup_interface(priv, ctx);
+        if (!err || reset)
+                goto out;
+
+        ctx->vif = NULL;
+        priv->iw_mode = NL80211_IFTYPE_STATION;
+ out:
+        mutex_unlock(&priv->mutex);
+
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+        return err;
+}
+
+static void iwl_teardown_interface(struct iwl_priv *priv,
+                                   struct ieee80211_vif *vif,
+                                   bool mode_change)
+{
+        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+
+        lockdep_assert_held(&priv->mutex);
+
+        if (priv->scan_vif == vif) {
+                iwl_scan_cancel_timeout(priv, 200);
+                iwl_force_scan_end(priv);
+        }
+
+        if (!mode_change) {
+                iwl_set_mode(priv, ctx);
+                if (!ctx->always_active)
+                        ctx->is_active = false;
+        }
+
+        /*
+         * When removing the IBSS interface, overwrite the
+         * BT traffic load with the stored one from the last
+         * notification, if any. If this is a device that
+         * doesn't implement this, this has no effect since
+         * both values are the same and zero.
+         */
+        if (vif->type == NL80211_IFTYPE_ADHOC)
+                priv->bt_traffic_load = priv->last_bt_traffic_load;
+}
+
+static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        mutex_lock(&priv->mutex);
+
+        if (WARN_ON(ctx->vif != vif)) {
+                struct iwl_rxon_context *tmp;
+                IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
+                for_each_context(priv, tmp)
+                        IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
+                                tmp->ctxid, tmp, tmp->vif);
+        }
+        ctx->vif = NULL;
+
+        iwl_teardown_interface(priv, vif, false);
+
+        mutex_unlock(&priv->mutex);
+
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+}
+
+static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
+                                struct ieee80211_vif *vif,
+                                enum nl80211_iftype newtype, bool newp2p)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+        struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        struct iwl_rxon_context *tmp;
+        enum nl80211_iftype newviftype = newtype;
+        u32 interface_modes;
+        int err;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        newtype = ieee80211_iftype_p2p(newtype, newp2p);
+
+        mutex_lock(&priv->mutex);
+
+        if (!ctx->vif || !iwl_is_ready_rf(priv)) {
+                /*
+                 * Huh? But wait ... this can maybe happen when
+                 * we're in the middle of a firmware restart!
+                 */
+                err = -EBUSY;
+                goto out;
+        }
+
+        interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
+
+        if (!(interface_modes & BIT(newtype))) {
+                err = -EBUSY;
+                goto out;
+        }
+
+        /*
+         * Refuse a change that should be done by moving from the PAN
+         * context to the BSS context instead, if the BSS context is
+         * available and can support the new interface type.
+         */
+        if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
+            (bss_ctx->interface_modes & BIT(newtype) ||
+             bss_ctx->exclusive_interface_modes & BIT(newtype))) {
+                BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
+                err = -EBUSY;
+                goto out;
+        }
+
+        if (ctx->exclusive_interface_modes & BIT(newtype)) {
+                for_each_context(priv, tmp) {
+                        if (ctx == tmp)
+                                continue;
+
+                        if (!tmp->vif)
+                                continue;
+
+                        /*
+                         * The current mode switch would be exclusive, but
+                         * another context is active ... refuse the switch.
+                         */
+                        err = -EBUSY;
+                        goto out;
+                }
+        }
+
+        /* success */
+        iwl_teardown_interface(priv, vif, true);
+        vif->type = newviftype;
+        vif->p2p = newp2p;
+        err = iwl_setup_interface(priv, ctx);
+        WARN_ON(err);
+        /*
+         * We've switched internally, but submitting to the
+         * device may have failed for some reason. Mask this
+         * error, because otherwise mac80211 will not switch
+         * (and set the interface type back) and we'll be
+         * out of sync with it.
+         */
+        err = 0;
+
+ out:
+        mutex_unlock(&priv->mutex);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        return err;
+}
+
+static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif,
+                              struct cfg80211_scan_request *req)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        int ret;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        if (req->n_channels == 0)
+                return -EINVAL;
+
+        mutex_lock(&priv->mutex);
+
+        /*
+         * If an internal scan is in progress, just set
+         * up the scan_request as per above.
+         */
+        if (priv->scan_type != IWL_SCAN_NORMAL) {
+                IWL_DEBUG_SCAN(priv,
+                               "SCAN request during internal scan - defer\n");
+                priv->scan_request = req;
+                priv->scan_vif = vif;
+                ret = 0;
+        } else {
+                priv->scan_request = req;
+                priv->scan_vif = vif;
+                /*
+                 * mac80211 will only ask for one band at a time
+                 * so using channels[0] here is ok
+                 */
+                ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
+                                        req->channels[0]->band);
+                if (ret) {
+                        priv->scan_request = NULL;
+                        priv->scan_vif = NULL;
+                }
+        }
+
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+
+        mutex_unlock(&priv->mutex);
+
+        return ret;
+}
+
+static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
+{
+        struct iwl_addsta_cmd cmd = {
+                .mode = STA_CONTROL_MODIFY_MSK,
+                .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
+                .sta.sta_id = sta_id,
+        };
+
+        iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
+}
+
+static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
+                                  struct ieee80211_vif *vif,
+                                  enum sta_notify_cmd cmd,
+                                  struct ieee80211_sta *sta)
+{
+        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
+        struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
+        int sta_id;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        switch (cmd) {
+        case STA_NOTIFY_SLEEP:
+                WARN_ON(!sta_priv->client);
+                sta_priv->asleep = true;
+                if (atomic_read(&sta_priv->pending_frames) > 0)
+                        ieee80211_sta_block_awake(hw, sta, true);
+                break;
+        case STA_NOTIFY_AWAKE:
+                WARN_ON(!sta_priv->client);
+                if (!sta_priv->asleep)
+                        break;
+                sta_priv->asleep = false;
+                sta_id = iwl_sta_id(sta);
+                if (sta_id != IWL_INVALID_STATION)
+                        iwl_sta_modify_ps_wake(priv, sta_id);
+                break;
+        default:
+                break;
+        }
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+struct ieee80211_ops iwlagn_hw_ops = {
+        .tx = iwlagn_mac_tx,
+        .start = iwlagn_mac_start,
+        .stop = iwlagn_mac_stop,
+#ifdef CONFIG_PM_SLEEP
+        .suspend = iwlagn_mac_suspend,
+        .resume = iwlagn_mac_resume,
+        .set_wakeup = iwlagn_mac_set_wakeup,
+#endif
+        .add_interface = iwlagn_mac_add_interface,
+        .remove_interface = iwlagn_mac_remove_interface,
+        .change_interface = iwlagn_mac_change_interface,
+        .config = iwlagn_mac_config,
+        .configure_filter = iwlagn_configure_filter,
+        .set_key = iwlagn_mac_set_key,
+        .update_tkip_key = iwlagn_mac_update_tkip_key,
+        .set_rekey_data = iwlagn_mac_set_rekey_data,
+        .conf_tx = iwlagn_mac_conf_tx,
+        .bss_info_changed = iwlagn_bss_info_changed,
+        .ampdu_action = iwlagn_mac_ampdu_action,
+        .hw_scan = iwlagn_mac_hw_scan,
+        .sta_notify = iwlagn_mac_sta_notify,
+        .sta_state = iwlagn_mac_sta_state,
+        .channel_switch = iwlagn_mac_channel_switch,
+        .flush = iwlagn_mac_flush,
+        .tx_last_beacon = iwlagn_mac_tx_last_beacon,
+        .remain_on_channel = iwlagn_mac_remain_on_channel,
+        .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
+        .rssi_callback = iwlagn_mac_rssi_callback,
+        CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
+        CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
+        .set_tim = iwlagn_mac_set_tim,
+};
+
+/* This function both allocates and initializes hw and priv. */
+struct ieee80211_hw *iwl_alloc_all(void)
+{
+        struct iwl_priv *priv;
+        struct iwl_op_mode *op_mode;
+        /* mac80211 allocates memory for this device instance, including
+         *   space for this driver's private structure */
+        struct ieee80211_hw *hw;
+
+        hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
+                                sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
+        if (!hw)
+                goto out;
+
+        op_mode = hw->priv;
+        priv = IWL_OP_MODE_GET_DVM(op_mode);
+        priv->hw = hw;
+
+out:
+        return hw;
+}