--- /dev/null
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2011 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/firmware.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+
+#include <net/mac80211.h>
+
+#include <asm/div64.h>
+
+#include "iwl-eeprom.h"
+#include "iwl-dev.h"
+#include "iwl-core.h"
+#include "iwl-io.h"
+#include "iwl-agn-calib.h"
+#include "iwl-agn.h"
+#include "iwl-shared.h"
+#include "iwl-bus.h"
+#include "iwl-trans.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,
+ struct iwlagn_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;
+
+ /*
+ * 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;
+ */
+
+ hw->flags |= IEEE80211_HW_SUPPORTS_PS |
+ IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
+
+ if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
+ hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
+ IEEE80211_HW_SUPPORTS_STATIC_SMPS;
+
+ if (capa->flags & IWL_UCODE_TLV_FLAGS_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;
+
+ if (trans(priv)->ucode_wowlan.code.len &&
+ device_can_wakeup(bus(priv)->dev)) {
+ hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
+ WIPHY_WOWLAN_DISCONNECT |
+ WIPHY_WOWLAN_EAP_IDENTITY_REQ |
+ WIPHY_WOWLAN_RFKILL_RELEASE;
+ if (!iwlagn_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;
+ }
+
+ if (iwlagn_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 zero-length SSID element */
+ hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
+
+ /* Default value; 4 EDCA QOS priorities */
+ hw->queues = 4;
+
+ hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
+
+ if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
+ priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
+ &priv->bands[IEEE80211_BAND_2GHZ];
+ if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
+ priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
+ &priv->bands[IEEE80211_BAND_5GHZ];
+
+ iwl_leds_init(priv);
+
+ ret = ieee80211_register_hw(priv->hw);
+ if (ret) {
+ IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
+ return ret;
+ }
+ priv->mac80211_registered = 1;
+
+ return 0;
+}
+
+static int __iwl_up(struct iwl_priv *priv)
+{
+ struct iwl_rxon_context *ctx;
+ int ret;
+
+ lockdep_assert_held(&priv->shrd->mutex);
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->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 = iwlagn_run_init_ucode(priv);
+ if (ret) {
+ IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
+ goto error;
+ }
+
+ ret = iwlagn_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->shrd->status);
+ __iwl_down(priv);
+ clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
+
+ IWL_ERR(priv, "Unable to initialize device.\n");
+ return ret;
+}
+
+static int iwlagn_mac_start(struct ieee80211_hw *hw)
+{
+ struct iwl_priv *priv = hw->priv;
+ int ret;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ /* we should be verifying the device is ready to be opened */
+ mutex_lock(&priv->shrd->mutex);
+ ret = __iwl_up(priv);
+ mutex_unlock(&priv->shrd->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->shrd->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 = hw->priv;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ if (!priv->is_open)
+ return;
+
+ priv->is_open = 0;
+
+ iwl_down(priv);
+
+ flush_workqueue(priv->shrd->workqueue);
+
+ /* User space software may expect getting rfkill changes
+ * even if interface is down */
+ iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
+ iwl_enable_rfkill_int(priv);
+
+ 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 = hw->priv;
+
+ if (iwlagn_mod_params.sw_crypto)
+ return;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+ mutex_lock(&priv->shrd->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->shrd->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 = hw->priv;
+ 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->shrd->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, hw, wowlan);
+ if (ret)
+ goto error;
+
+ device_set_wakeup_enable(bus(priv)->dev, true);
+
+ /* Now let the ucode operate on its own */
+ iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
+ CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
+
+ goto out;
+
+ error:
+ priv->shrd->wowlan = false;
+ iwlagn_prepare_restart(priv);
+ ieee80211_restart_hw(priv->hw);
+ out:
+ mutex_unlock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+ return ret;
+}
+
+static int iwlagn_mac_resume(struct ieee80211_hw *hw)
+{
+ struct iwl_priv *priv = hw->priv;
+ 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->shrd->mutex);
+
+ iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
+ CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
+
+ base = priv->shrd->device_pointers.error_event_table;
+ if (iwlagn_hw_valid_rtc_data_addr(base)) {
+ spin_lock_irqsave(&bus(priv)->reg_lock, flags);
+ ret = iwl_grab_nic_access_silent(bus(priv));
+ if (ret == 0) {
+ iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
+ status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
+ iwl_release_nic_access(bus(priv));
+ }
+ spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ if (ret == 0) {
+ struct iwl_trans *trans = trans(priv);
+ if (!priv->wowlan_sram)
+ priv->wowlan_sram =
+ kzalloc(trans->ucode_wowlan.data.len,
+ GFP_KERNEL);
+
+ if (priv->wowlan_sram)
+ _iwl_read_targ_mem_words(
+ bus(priv), 0x800000, priv->wowlan_sram,
+ trans->ucode_wowlan.data.len / 4);
+ }
+#endif
+ }
+
+ /* we'll clear ctx->vif during iwlagn_prepare_restart() */
+ vif = ctx->vif;
+
+ priv->shrd->wowlan = false;
+
+ device_set_wakeup_enable(bus(priv)->dev, 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->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+ ieee80211_resume_disconnect(vif);
+
+ return 1;
+}
+
+#endif
+
+static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct iwl_priv *priv = hw->priv;
+
+ 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 = hw->priv;
+
+ 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 = hw->priv;
+ 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 (iwlagn_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->shrd->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->shrd->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 = hw->priv;
+ int ret = -EINVAL;
+ struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
+ struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+
+ IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
+ sta->addr, tid);
+
+ if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
+ return -EACCES;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+ mutex_lock(&priv->shrd->mutex);
+
+ switch (action) {
+ case IEEE80211_AMPDU_RX_START:
+ 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);
+ if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
+ ret = 0;
+ break;
+ case IEEE80211_AMPDU_TX_START:
+ 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 (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
+ ret = 0;
+ if (!priv->agg_tids_count && priv->cfg->ht_params &&
+ priv->cfg->ht_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:
+ buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
+
+ iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, iwl_sta_id(sta),
+ tid, buf_size);
+
+ /*
+ * If the limit is 0, then it wasn't initialised yet,
+ * use the default. We can do that since we take the
+ * minimum below, and we don't want to go above our
+ * default due to hardware restrictions.
+ */
+ if (sta_priv->max_agg_bufsize == 0)
+ sta_priv->max_agg_bufsize =
+ LINK_QUAL_AGG_FRAME_LIMIT_DEF;
+
+ /*
+ * Even though in theory the peer could have different
+ * aggregation reorder buffer sizes for different sessions,
+ * our ucode doesn't allow for that and has a global limit
+ * for each station. Therefore, use the minimum of all the
+ * aggregation sessions and our default value.
+ */
+ sta_priv->max_agg_bufsize =
+ min(sta_priv->max_agg_bufsize, buf_size);
+
+ if (priv->cfg->ht_params &&
+ priv->cfg->ht_params->use_rts_for_aggregation) {
+ /*
+ * switch to RTS/CTS if it is the prefer protection
+ * method for HT traffic
+ */
+
+ sta_priv->lq_sta.lq.general_params.flags |=
+ LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
+ }
+ priv->agg_tids_count++;
+ IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
+ priv->agg_tids_count);
+
+ sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
+ sta_priv->max_agg_bufsize;
+
+ iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
+ &sta_priv->lq_sta.lq, CMD_ASYNC, false);
+
+ IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
+ sta->addr, tid);
+ ret = 0;
+ break;
+ }
+ mutex_unlock(&priv->shrd->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 = hw->priv;
+ 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 = 0;
+ u8 sta_id;
+
+ IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
+ sta->addr);
+ mutex_lock(&priv->shrd->mutex);
+ 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 ? */
+ goto out;
+ }
+
+ sta_priv->sta_id = sta_id;
+
+ /* Initialize rate scaling */
+ IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
+ sta->addr);
+ iwl_rs_rate_init(priv, sta, sta_id);
+ out:
+ mutex_unlock(&priv->shrd->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 = hw->priv;
+ const struct iwl_channel_info *ch_info;
+ 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->shrd->mutex);
+
+ if (iwl_is_rfkill(priv->shrd))
+ goto out;
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
+ test_bit(STATUS_SCANNING, &priv->shrd->status) ||
+ test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
+ goto out;
+
+ if (!iwl_is_associated_ctx(ctx))
+ goto out;
+
+ if (!priv->cfg->lib->set_channel_switch)
+ goto out;
+
+ ch = channel->hw_value;
+ if (le16_to_cpu(ctx->active.channel) == ch)
+ goto out;
+
+ ch_info = iwl_get_channel_info(priv, channel->band, ch);
+ if (!is_channel_valid(ch_info)) {
+ IWL_DEBUG_MAC80211(priv, "invalid channel\n");
+ goto out;
+ }
+
+ spin_lock_irq(&priv->shrd->lock);
+
+ 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);
+
+ spin_unlock_irq(&priv->shrd->lock);
+
+ iwl_set_rate(priv);
+ /*
+ * at this point, staging_rxon has the
+ * configuration for channel switch
+ */
+ set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
+ priv->switch_channel = cpu_to_le16(ch);
+ if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
+ clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
+ priv->switch_channel = 0;
+ ieee80211_chswitch_done(ctx->vif, false);
+ }
+
+out:
+ mutex_unlock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+static void iwlagn_configure_filter(struct ieee80211_hw *hw,
+ unsigned int changed_flags,
+ unsigned int *total_flags,
+ u64 multicast)
+{
+ struct iwl_priv *priv = hw->priv;
+ __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->shrd->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->shrd->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 = hw->priv;
+
+ mutex_lock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
+ IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
+ goto done;
+ }
+ if (iwl_is_rfkill(priv->shrd)) {
+ 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(trans(priv));
+done:
+ mutex_unlock(&priv->shrd->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 = hw->priv;
+ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
+ int err = 0;
+
+ if (!(priv->shrd->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->shrd->mutex);
+
+ if (test_bit(STATUS_SCAN_HW, &priv->shrd->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->shrd->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 = hw->priv;
+
+ if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
+ return -EOPNOTSUPP;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+ mutex_lock(&priv->shrd->mutex);
+ iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
+ iwlagn_disable_roc(priv);
+ mutex_unlock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+ return 0;
+}
+
+static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ const u8 *bssid,
+ enum ieee80211_tx_sync_type type)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+ struct iwl_rxon_context *ctx = vif_priv->ctx;
+ int ret;
+ u8 sta_id;
+
++ if (ctx->ctxid != IWL_RXON_CTX_PAN)
++ return 0;
++
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+ mutex_lock(&priv->shrd->mutex);
+
+ if (iwl_is_associated_ctx(ctx)) {
+ ret = 0;
+ goto out;
+ }
+
+ if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
+ &priv->shrd->status)) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
+ if (ret)
+ goto out;
+
+ if (WARN_ON(sta_id != ctx->ap_sta_id)) {
+ ret = -EIO;
+ goto out_remove_sta;
+ }
+
+ memcpy(ctx->bssid, bssid, ETH_ALEN);
+ ctx->preauth_bssid = true;
+
+ ret = iwlagn_commit_rxon(priv, ctx);
+
+ if (ret == 0)
+ goto out;
+
+ out_remove_sta:
+ iwl_remove_station(priv, sta_id, bssid);
+ out:
+ mutex_unlock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+ return ret;
+}
+
+static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ const u8 *bssid,
+ enum ieee80211_tx_sync_type type)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+ struct iwl_rxon_context *ctx = vif_priv->ctx;
+
++ if (ctx->ctxid != IWL_RXON_CTX_PAN)
++ return;
++
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+ mutex_lock(&priv->shrd->mutex);
+
+ if (iwl_is_associated_ctx(ctx))
+ goto out;
+
+ iwl_remove_station(priv, ctx->ap_sta_id, bssid);
+ ctx->preauth_bssid = false;
+ /* no need to commit */
+ out:
+ mutex_unlock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
+static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
+ enum ieee80211_rssi_event rssi_event)
+{
+ struct iwl_priv *priv = hw->priv;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+ mutex_lock(&priv->shrd->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->shrd->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 = hw->priv;
+
+ queue_work(priv->shrd->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 = hw->priv;
+ struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+ struct iwl_rxon_context *ctx = vif_priv->ctx;
+ unsigned long flags;
+ int q;
+
+ if (WARN_ON(!ctx))
+ return -EINVAL;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ if (!iwl_is_ready_rf(priv->shrd)) {
+ 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;
+
+ spin_lock_irqsave(&priv->shrd->lock, flags);
+
+ 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;
+
+ spin_unlock_irqrestore(&priv->shrd->lock, flags);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+ return 0;
+}
+
+static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
+{
+ struct iwl_priv *priv = hw->priv;
+
+ 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;
+
+ lockdep_assert_held(&priv->shrd->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;
+ }
+
+ return 0;
+}
+
+static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_priv *priv = hw->priv;
+ 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);
+
+ 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->shrd->mutex);
+
+ iwlagn_disable_roc(priv);
+
+ if (!iwl_is_ready_rf(priv->shrd)) {
+ 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) {
+ /* 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)
+ goto out;
+
+ ctx->vif = NULL;
+ priv->iw_mode = NL80211_IFTYPE_STATION;
+ out:
+ mutex_unlock(&priv->shrd->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->shrd->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 = hw->priv;
+ struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ mutex_lock(&priv->shrd->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->shrd->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 = hw->priv;
+ 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->shrd->mutex);
+
+ if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
+ /*
+ * 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->shrd->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 = hw->priv;
+ int ret;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ if (req->n_channels == 0)
+ return -EINVAL;
+
+ mutex_lock(&priv->shrd->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->shrd->mutex);
+
+ return ret;
+}
+
+static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
+ int ret;
+
+ IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
+ "station %pM\n", sta->addr);
+ mutex_lock(&priv->shrd->mutex);
+ IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
+ sta->addr);
+ 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);
+ mutex_unlock(&priv->shrd->mutex);
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+ return ret;
+}
+
+static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->shrd->sta_lock, flags);
+ priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
+ priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
+ priv->stations[sta_id].sta.sta.modify_mask = 0;
+ priv->stations[sta_id].sta.sleep_tx_count = 0;
+ priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
+ iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
+ spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
+
+}
+
+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 = hw->priv;
+ 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,
+#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_add = iwlagn_mac_sta_add,
+ .sta_remove = iwlagn_mac_sta_remove,
+ .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)
+ .tx_sync = iwlagn_mac_tx_sync,
+ .finish_tx_sync = iwlagn_mac_finish_tx_sync,
+ .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;
+ /* 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), &iwlagn_hw_ops);
+ if (!hw)
+ goto out;
+
+ priv = hw->priv;
+ priv->hw = hw;
+
+out:
+ return hw;
+}
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff