mac80211: make ieee80211_find_sta per virtual interface

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c

/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
 *
 * 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.GPL.
 *
 * 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/etherdevice.h>
#include <net/mac80211.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h" /* FIXME: remove */
#include "iwl-debug.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-power.h"
#include "iwl-sta.h"
#include "iwl-helpers.h"


MODULE_DESCRIPTION("iwl core");
MODULE_VERSION(IWLWIFI_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");

static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
        {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
         0, COEX_UNASSOC_IDLE_FLAGS},
        {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
         0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
        {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
         0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
        {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
         0, COEX_CALIBRATION_FLAGS},
        {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
         0, COEX_PERIODIC_CALIBRATION_FLAGS},
        {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
         0, COEX_CONNECTION_ESTAB_FLAGS},
        {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
         0, COEX_ASSOCIATED_IDLE_FLAGS},
        {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
         0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
        {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
         0, COEX_ASSOC_AUTO_SCAN_FLAGS},
        {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
         0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
        {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
        {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
        {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
         0, COEX_STAND_ALONE_DEBUG_FLAGS},
        {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
         0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
        {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
        {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
};

#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
        [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
                                    IWL_RATE_SISO_##s##M_PLCP, \
                                    IWL_RATE_MIMO2_##s##M_PLCP,\
                                    IWL_RATE_MIMO3_##s##M_PLCP,\
                                    IWL_RATE_##r##M_IEEE,      \
                                    IWL_RATE_##ip##M_INDEX,    \
                                    IWL_RATE_##in##M_INDEX,    \
                                    IWL_RATE_##rp##M_INDEX,    \
                                    IWL_RATE_##rn##M_INDEX,    \
                                    IWL_RATE_##pp##M_INDEX,    \
                                    IWL_RATE_##np##M_INDEX }

u32 iwl_debug_level;
EXPORT_SYMBOL(iwl_debug_level);

static irqreturn_t iwl_isr(int irq, void *data);

/*
 * Parameter order:
 *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 *
 * If there isn't a valid next or previous rate then INV is used which
 * maps to IWL_RATE_INVALID
 *
 */
const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
        IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
        IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
        IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
        IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
        IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
        IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
        IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
        IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
        IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
        IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
        IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
        IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
        IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
        /* FIXME:RS:          ^^    should be INV (legacy) */
};
EXPORT_SYMBOL(iwl_rates);

/**
 * translate ucode response to mac80211 tx status control values
 */
void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
                                  struct ieee80211_tx_info *info)
{
        struct ieee80211_tx_rate *r = &info->control.rates[0];

        info->antenna_sel_tx =
                ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
        if (rate_n_flags & RATE_MCS_HT_MSK)
                r->flags |= IEEE80211_TX_RC_MCS;
        if (rate_n_flags & RATE_MCS_GF_MSK)
                r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
        if (rate_n_flags & RATE_MCS_HT40_MSK)
                r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
        if (rate_n_flags & RATE_MCS_DUP_MSK)
                r->flags |= IEEE80211_TX_RC_DUP_DATA;
        if (rate_n_flags & RATE_MCS_SGI_MSK)
                r->flags |= IEEE80211_TX_RC_SHORT_GI;
        r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
}
EXPORT_SYMBOL(iwl_hwrate_to_tx_control);

int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
{
        int idx = 0;

        /* HT rate format */
        if (rate_n_flags & RATE_MCS_HT_MSK) {
                idx = (rate_n_flags & 0xff);

                if (idx >= IWL_RATE_MIMO3_6M_PLCP)
                        idx = idx - IWL_RATE_MIMO3_6M_PLCP;
                else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
                        idx = idx - IWL_RATE_MIMO2_6M_PLCP;

                idx += IWL_FIRST_OFDM_RATE;
                /* skip 9M not supported in ht*/
                if (idx >= IWL_RATE_9M_INDEX)
                        idx += 1;
                if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
                        return idx;

        /* legacy rate format, search for match in table */
        } else {
                for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
                        if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
                                return idx;
        }

        return -1;
}
EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);

int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
{
        int idx = 0;
        int band_offset = 0;

        /* HT rate format: mac80211 wants an MCS number, which is just LSB */
        if (rate_n_flags & RATE_MCS_HT_MSK) {
                idx = (rate_n_flags & 0xff);
                return idx;
        /* Legacy rate format, search for match in table */
        } else {
                if (band == IEEE80211_BAND_5GHZ)
                        band_offset = IWL_FIRST_OFDM_RATE;
                for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
                        if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
                                return idx - band_offset;
        }

        return -1;
}

u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
{
        int i;
        u8 ind = ant;
        for (i = 0; i < RATE_ANT_NUM - 1; i++) {
                ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
                if (priv->hw_params.valid_tx_ant & BIT(ind))
                        return ind;
        }
        return ant;
}

const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
EXPORT_SYMBOL(iwl_bcast_addr);


/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
                struct ieee80211_ops *hw_ops)
{
        struct iwl_priv *priv;

        /* mac80211 allocates memory for this device instance, including
         *   space for this driver's private structure */
        struct ieee80211_hw *hw =
                ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
        if (hw == NULL) {
                printk(KERN_ERR "%s: Can not allocate network device\n",
                       cfg->name);
                goto out;
        }

        priv = hw->priv;
        priv->hw = hw;

out:
        return hw;
}
EXPORT_SYMBOL(iwl_alloc_all);

void iwl_hw_detect(struct iwl_priv *priv)
{
        priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
        priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
        pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
}
EXPORT_SYMBOL(iwl_hw_detect);

int iwl_hw_nic_init(struct iwl_priv *priv)
{
        unsigned long flags;
        struct iwl_rx_queue *rxq = &priv->rxq;
        int ret;

        /* nic_init */
        spin_lock_irqsave(&priv->lock, flags);
        priv->cfg->ops->lib->apm_ops.init(priv);
        iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
        spin_unlock_irqrestore(&priv->lock, flags);

        ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);

        priv->cfg->ops->lib->apm_ops.config(priv);

        /* Allocate the RX queue, or reset if it is already allocated */
        if (!rxq->bd) {
                ret = iwl_rx_queue_alloc(priv);
                if (ret) {
                        IWL_ERR(priv, "Unable to initialize Rx queue\n");
                        return -ENOMEM;
                }
        } else
                iwl_rx_queue_reset(priv, rxq);

        iwl_rx_replenish(priv);

        iwl_rx_init(priv, rxq);

        spin_lock_irqsave(&priv->lock, flags);

        rxq->need_update = 1;
        iwl_rx_queue_update_write_ptr(priv, rxq);

        spin_unlock_irqrestore(&priv->lock, flags);

        /* Allocate and init all Tx and Command queues */
        ret = iwl_txq_ctx_reset(priv);
        if (ret)
                return ret;

        set_bit(STATUS_INIT, &priv->status);

        return 0;
}
EXPORT_SYMBOL(iwl_hw_nic_init);

/*
 * QoS  support
*/
void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        priv->qos_data.def_qos_parm.qos_flags = 0;

        if (priv->qos_data.qos_cap.q_AP.queue_request &&
            !priv->qos_data.qos_cap.q_AP.txop_request)
                priv->qos_data.def_qos_parm.qos_flags |=
                        QOS_PARAM_FLG_TXOP_TYPE_MSK;
        if (priv->qos_data.qos_active)
                priv->qos_data.def_qos_parm.qos_flags |=
                        QOS_PARAM_FLG_UPDATE_EDCA_MSK;

        if (priv->current_ht_config.is_ht)
                priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;

        if (force || iwl_is_associated(priv)) {
                IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
                                priv->qos_data.qos_active,
                                priv->qos_data.def_qos_parm.qos_flags);

                iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
                                       sizeof(struct iwl_qosparam_cmd),
                                       &priv->qos_data.def_qos_parm, NULL);
        }
}
EXPORT_SYMBOL(iwl_activate_qos);

/*
 * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 *                                              (802.11b)      (802.11a/g)
 * AC_BK      15            1023        7           0               0
 * AC_BE      15            1023        3           0               0
 * AC_VI       7              15        2          6.016ms       3.008ms
 * AC_VO       3               7        2          3.264ms       1.504ms
 */
void iwl_reset_qos(struct iwl_priv *priv)
{
        u16 cw_min = 15;
        u16 cw_max = 1023;
        u8 aifs = 2;
        bool is_legacy = false;
        unsigned long flags;
        int i;

        spin_lock_irqsave(&priv->lock, flags);
        /* QoS always active in AP and ADHOC mode
         * In STA mode wait for association
         */
        if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
            priv->iw_mode == NL80211_IFTYPE_AP)
                priv->qos_data.qos_active = 1;
        else
                priv->qos_data.qos_active = 0;

        /* check for legacy mode */
        if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
            (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
            (priv->iw_mode == NL80211_IFTYPE_STATION &&
            (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
                cw_min = 31;
                is_legacy = 1;
        }

        if (priv->qos_data.qos_active)
                aifs = 3;

        /* AC_BE */
        priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
        priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
        priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
        priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
        priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;

        if (priv->qos_data.qos_active) {
                /* AC_BK */
                i = 1;
                priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
                priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
                priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
                priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
                priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

                /* AC_VI */
                i = 2;
                priv->qos_data.def_qos_parm.ac[i].cw_min =
                        cpu_to_le16((cw_min + 1) / 2 - 1);
                priv->qos_data.def_qos_parm.ac[i].cw_max =
                        cpu_to_le16(cw_min);
                priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
                if (is_legacy)
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(6016);
                else
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(3008);
                priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

                /* AC_VO */
                i = 3;
                priv->qos_data.def_qos_parm.ac[i].cw_min =
                        cpu_to_le16((cw_min + 1) / 4 - 1);
                priv->qos_data.def_qos_parm.ac[i].cw_max =
                        cpu_to_le16((cw_min + 1) / 2 - 1);
                priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
                priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
                if (is_legacy)
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(3264);
                else
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(1504);
        } else {
                for (i = 1; i < 4; i++) {
                        priv->qos_data.def_qos_parm.ac[i].cw_min =
                                cpu_to_le16(cw_min);
                        priv->qos_data.def_qos_parm.ac[i].cw_max =
                                cpu_to_le16(cw_max);
                        priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
                        priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
                        priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
                }
        }
        IWL_DEBUG_QOS(priv, "set QoS to default \n");

        spin_unlock_irqrestore(&priv->lock, flags);
}
EXPORT_SYMBOL(iwl_reset_qos);

#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
                              struct ieee80211_sta_ht_cap *ht_info,
                              enum ieee80211_band band)
{
        u16 max_bit_rate = 0;
        u8 rx_chains_num = priv->hw_params.rx_chains_num;
        u8 tx_chains_num = priv->hw_params.tx_chains_num;

        ht_info->cap = 0;
        memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));

        ht_info->ht_supported = true;

        if (priv->cfg->ht_greenfield_support)
                ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
        ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
        if (priv->cfg->support_sm_ps)
                ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
                                     (WLAN_HT_CAP_SM_PS_DYNAMIC << 2));
        else
                ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
                                     (WLAN_HT_CAP_SM_PS_DISABLED << 2));

        max_bit_rate = MAX_BIT_RATE_20_MHZ;
        if (priv->hw_params.ht40_channel & BIT(band)) {
                ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
                ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
                ht_info->mcs.rx_mask[4] = 0x01;
                max_bit_rate = MAX_BIT_RATE_40_MHZ;
        }

        if (priv->cfg->mod_params->amsdu_size_8K)
                ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;

        ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
        ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;

        ht_info->mcs.rx_mask[0] = 0xFF;
        if (rx_chains_num >= 2)
                ht_info->mcs.rx_mask[1] = 0xFF;
        if (rx_chains_num >= 3)
                ht_info->mcs.rx_mask[2] = 0xFF;

        /* Highest supported Rx data rate */
        max_bit_rate *= rx_chains_num;
        WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
        ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);

        /* Tx MCS capabilities */
        ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
        if (tx_chains_num != rx_chains_num) {
                ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
                ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
                                IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
        }
}

/**
 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 */
int iwlcore_init_geos(struct iwl_priv *priv)
{
        struct iwl_channel_info *ch;
        struct ieee80211_supported_band *sband;
        struct ieee80211_channel *channels;
        struct ieee80211_channel *geo_ch;
        struct ieee80211_rate *rates;
        int i = 0;

        if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
            priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
                IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
                set_bit(STATUS_GEO_CONFIGURED, &priv->status);
                return 0;
        }

        channels = kzalloc(sizeof(struct ieee80211_channel) *
                           priv->channel_count, GFP_KERNEL);
        if (!channels)
                return -ENOMEM;

        rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
                        GFP_KERNEL);
        if (!rates) {
                kfree(channels);
                return -ENOMEM;
        }

        /* 5.2GHz channels start after the 2.4GHz channels */
        sband = &priv->bands[IEEE80211_BAND_5GHZ];
        sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
        /* just OFDM */
        sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
        sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;

        if (priv->cfg->sku & IWL_SKU_N)
                iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
                                         IEEE80211_BAND_5GHZ);

        sband = &priv->bands[IEEE80211_BAND_2GHZ];
        sband->channels = channels;
        /* OFDM & CCK */
        sband->bitrates = rates;
        sband->n_bitrates = IWL_RATE_COUNT_LEGACY;

        if (priv->cfg->sku & IWL_SKU_N)
                iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
                                         IEEE80211_BAND_2GHZ);

        priv->ieee_channels = channels;
        priv->ieee_rates = rates;

        for (i = 0;  i < priv->channel_count; i++) {
                ch = &priv->channel_info[i];

                /* FIXME: might be removed if scan is OK */
                if (!is_channel_valid(ch))
                        continue;

                if (is_channel_a_band(ch))
                        sband =  &priv->bands[IEEE80211_BAND_5GHZ];
                else
                        sband =  &priv->bands[IEEE80211_BAND_2GHZ];

                geo_ch = &sband->channels[sband->n_channels++];

                geo_ch->center_freq =
                                ieee80211_channel_to_frequency(ch->channel);
                geo_ch->max_power = ch->max_power_avg;
                geo_ch->max_antenna_gain = 0xff;
                geo_ch->hw_value = ch->channel;

                if (is_channel_valid(ch)) {
                        if (!(ch->flags & EEPROM_CHANNEL_IBSS))
                                geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;

                        if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
                                geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;

                        if (ch->flags & EEPROM_CHANNEL_RADAR)
                                geo_ch->flags |= IEEE80211_CHAN_RADAR;

                        geo_ch->flags |= ch->ht40_extension_channel;

                        if (ch->max_power_avg > priv->tx_power_device_lmt)
                                priv->tx_power_device_lmt = ch->max_power_avg;
                } else {
                        geo_ch->flags |= IEEE80211_CHAN_DISABLED;
                }

                IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
                                ch->channel, geo_ch->center_freq,
                                is_channel_a_band(ch) ?  "5.2" : "2.4",
                                geo_ch->flags & IEEE80211_CHAN_DISABLED ?
                                "restricted" : "valid",
                                 geo_ch->flags);
        }

        if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
             priv->cfg->sku & IWL_SKU_A) {
                IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
                        "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
                           priv->pci_dev->device,
                           priv->pci_dev->subsystem_device);
                priv->cfg->sku &= ~IWL_SKU_A;
        }

        IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
                   priv->bands[IEEE80211_BAND_2GHZ].n_channels,
                   priv->bands[IEEE80211_BAND_5GHZ].n_channels);

        set_bit(STATUS_GEO_CONFIGURED, &priv->status);

        return 0;
}
EXPORT_SYMBOL(iwlcore_init_geos);

/*
 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 */
void iwlcore_free_geos(struct iwl_priv *priv)
{
        kfree(priv->ieee_channels);
        kfree(priv->ieee_rates);
        clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
EXPORT_SYMBOL(iwlcore_free_geos);

/*
 *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 *  function.
 */
void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
                                __le32 *tx_flags)
{
        if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
                *tx_flags |= TX_CMD_FLG_RTS_MSK;
                *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
        } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
                *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
                *tx_flags |= TX_CMD_FLG_CTS_MSK;
        }
}
EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);

static bool is_single_rx_stream(struct iwl_priv *priv)
{
        return !priv->current_ht_config.is_ht ||
               priv->current_ht_config.single_chain_sufficient;
}

static u8 iwl_is_channel_extension(struct iwl_priv *priv,
                                   enum ieee80211_band band,
                                   u16 channel, u8 extension_chan_offset)
{
        const struct iwl_channel_info *ch_info;

        ch_info = iwl_get_channel_info(priv, band, channel);
        if (!is_channel_valid(ch_info))
                return 0;

        if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
                return !(ch_info->ht40_extension_channel &
                                        IEEE80211_CHAN_NO_HT40PLUS);
        else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
                return !(ch_info->ht40_extension_channel &
                                        IEEE80211_CHAN_NO_HT40MINUS);

        return 0;
}

u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
                         struct ieee80211_sta_ht_cap *sta_ht_inf)
{
        struct iwl_ht_config *ht_conf = &priv->current_ht_config;

        if (!ht_conf->is_ht || !ht_conf->is_40mhz)
                return 0;

        /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
         * the bit will not set if it is pure 40MHz case
         */
        if (sta_ht_inf) {
                if (!sta_ht_inf->ht_supported)
                        return 0;
        }
#ifdef CONFIG_IWLWIFI_DEBUG
        if (priv->disable_ht40)
                return 0;
#endif
        return iwl_is_channel_extension(priv, priv->band,
                        le16_to_cpu(priv->staging_rxon.channel),
                        ht_conf->extension_chan_offset);
}
EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);

static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
{
        u16 new_val = 0;
        u16 beacon_factor = 0;

        beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
        new_val = beacon_val / beacon_factor;

        if (!new_val)
                new_val = max_beacon_val;

        return new_val;
}

void iwl_setup_rxon_timing(struct iwl_priv *priv)
{
        u64 tsf;
        s32 interval_tm, rem;
        unsigned long flags;
        struct ieee80211_conf *conf = NULL;
        u16 beacon_int;

        conf = ieee80211_get_hw_conf(priv->hw);

        spin_lock_irqsave(&priv->lock, flags);
        priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
        priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);

        if (priv->iw_mode == NL80211_IFTYPE_STATION) {
                beacon_int = priv->beacon_int;
                priv->rxon_timing.atim_window = 0;
        } else {
                beacon_int = priv->vif->bss_conf.beacon_int;

                /* TODO: we need to get atim_window from upper stack
                 * for now we set to 0 */
                priv->rxon_timing.atim_window = 0;
        }

        beacon_int = iwl_adjust_beacon_interval(beacon_int,
                                priv->hw_params.max_beacon_itrvl * 1024);
        priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);

        tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
        interval_tm = beacon_int * 1024;
        rem = do_div(tsf, interval_tm);
        priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);

        spin_unlock_irqrestore(&priv->lock, flags);
        IWL_DEBUG_ASSOC(priv,
                        "beacon interval %d beacon timer %d beacon tim %d\n",
                        le16_to_cpu(priv->rxon_timing.beacon_interval),
                        le32_to_cpu(priv->rxon_timing.beacon_init_val),
                        le16_to_cpu(priv->rxon_timing.atim_window));
}
EXPORT_SYMBOL(iwl_setup_rxon_timing);

void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

        if (hw_decrypt)
                rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
        else
                rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

}
EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);

/**
 * iwl_check_rxon_cmd - validate RXON structure is valid
 *
 * NOTE:  This is really only useful during development and can eventually
 * be #ifdef'd out once the driver is stable and folks aren't actively
 * making changes
 */
int iwl_check_rxon_cmd(struct iwl_priv *priv)
{
        int error = 0;
        int counter = 1;
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

        if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
                error |= le32_to_cpu(rxon->flags &
                                (RXON_FLG_TGJ_NARROW_BAND_MSK |
                                 RXON_FLG_RADAR_DETECT_MSK));
                if (error)
                        IWL_WARN(priv, "check 24G fields %d | %d\n",
                                    counter++, error);
        } else {
                error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
                                0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
                if (error)
                        IWL_WARN(priv, "check 52 fields %d | %d\n",
                                    counter++, error);
                error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
                if (error)
                        IWL_WARN(priv, "check 52 CCK %d | %d\n",
                                    counter++, error);
        }
        error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
        if (error)
                IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);

        /* make sure basic rates 6Mbps and 1Mbps are supported */
        error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
                  ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
        if (error)
                IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);

        error |= (le16_to_cpu(rxon->assoc_id) > 2007);
        if (error)
                IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);

        error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
                        == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
        if (error)
                IWL_WARN(priv, "check CCK and short slot %d | %d\n",
                            counter++, error);

        error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
                        == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
        if (error)
                IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
                            counter++, error);

        error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
                        RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
        if (error)
                IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
                            counter++, error);

        if (error)
                IWL_WARN(priv, "Tuning to channel %d\n",
                            le16_to_cpu(rxon->channel));

        if (error) {
                IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
                return -1;
        }
        return 0;
}
EXPORT_SYMBOL(iwl_check_rxon_cmd);

/**
 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 * @priv: staging_rxon is compared to active_rxon
 *
 * If the RXON structure is changing enough to require a new tune,
 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 */
int iwl_full_rxon_required(struct iwl_priv *priv)
{

        /* These items are only settable from the full RXON command */
        if (!(iwl_is_associated(priv)) ||
            compare_ether_addr(priv->staging_rxon.bssid_addr,
                               priv->active_rxon.bssid_addr) ||
            compare_ether_addr(priv->staging_rxon.node_addr,
                               priv->active_rxon.node_addr) ||
            compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
                               priv->active_rxon.wlap_bssid_addr) ||
            (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
            (priv->staging_rxon.channel != priv->active_rxon.channel) ||
            (priv->staging_rxon.air_propagation !=
             priv->active_rxon.air_propagation) ||
            (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
             priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
            (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
             priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
            (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
             priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
            (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
                return 1;

        /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
         * be updated with the RXON_ASSOC command -- however only some
         * flag transitions are allowed using RXON_ASSOC */

        /* Check if we are not switching bands */
        if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
            (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
                return 1;

        /* Check if we are switching association toggle */
        if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
                (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
                return 1;

        return 0;
}
EXPORT_SYMBOL(iwl_full_rxon_required);

u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
{
        int i;
        int rate_mask;

        /* Set rate mask*/
        if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
                rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
        else
                rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;

        /* Find lowest valid rate */
        for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
                                        i = iwl_rates[i].next_ieee) {
                if (rate_mask & (1 << i))
                        return iwl_rates[i].plcp;
        }

        /* No valid rate was found. Assign the lowest one */
        if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
                return IWL_RATE_1M_PLCP;
        else
                return IWL_RATE_6M_PLCP;
}
EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);

void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
{
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

        if (!ht_conf->is_ht) {
                rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
                        RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
                        RXON_FLG_HT40_PROT_MSK |
                        RXON_FLG_HT_PROT_MSK);
                return;
        }

        /* FIXME: if the definition of ht_protection changed, the "translation"
         * will be needed for rxon->flags
         */
        rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);

        /* Set up channel bandwidth:
         * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
        /* clear the HT channel mode before set the mode */
        rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
        if (iwl_is_ht40_tx_allowed(priv, NULL)) {
                /* pure ht40 */
                if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
                        rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
                        /* Note: control channel is opposite of extension channel */
                        switch (ht_conf->extension_chan_offset) {
                        case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
                                rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
                                break;
                        case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
                                rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
                                break;
                        }
                } else {
                        /* Note: control channel is opposite of extension channel */
                        switch (ht_conf->extension_chan_offset) {
                        case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
                                rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
                                rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
                                break;
                        case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
                                rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
                                rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
                                break;
                        case IEEE80211_HT_PARAM_CHA_SEC_NONE:
                        default:
                                /* channel location only valid if in Mixed mode */
                                IWL_ERR(priv, "invalid extension channel offset\n");
                                break;
                        }
                }
        } else {
                rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
        }

        if (priv->cfg->ops->hcmd->set_rxon_chain)
                priv->cfg->ops->hcmd->set_rxon_chain(priv);

        IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
                        "extension channel offset 0x%x\n",
                        le32_to_cpu(rxon->flags), ht_conf->ht_protection,
                        ht_conf->extension_chan_offset);
        return;
}
EXPORT_SYMBOL(iwl_set_rxon_ht);

#define IWL_NUM_RX_CHAINS_MULTIPLE      3
#define IWL_NUM_RX_CHAINS_SINGLE        2
#define IWL_NUM_IDLE_CHAINS_DUAL        2
#define IWL_NUM_IDLE_CHAINS_SINGLE      1

/*
 * Determine how many receiver/antenna chains to use.
 *
 * More provides better reception via diversity.  Fewer saves power
 * at the expense of throughput, but only when not in powersave to
 * start with.
 *
 * MIMO (dual stream) requires at least 2, but works better with 3.
 * This does not determine *which* chains to use, just how many.
 */
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
{
        /* # of Rx chains to use when expecting MIMO. */
        if (is_single_rx_stream(priv))
                return IWL_NUM_RX_CHAINS_SINGLE;
        else
                return IWL_NUM_RX_CHAINS_MULTIPLE;
}

/*
 * When we are in power saving mode, unless device support spatial
 * multiplexing power save, use the active count for rx chain count.
 */
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
        int idle_cnt = active_cnt;
        bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);

        if (priv->cfg->support_sm_ps) {
                /* # Rx chains when idling and maybe trying to save power */
                switch (priv->current_ht_config.sm_ps) {
                case WLAN_HT_CAP_SM_PS_STATIC:
                case WLAN_HT_CAP_SM_PS_DYNAMIC:
                        idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
                                IWL_NUM_IDLE_CHAINS_SINGLE;
                        break;
                case WLAN_HT_CAP_SM_PS_DISABLED:
                        idle_cnt = (is_cam) ? active_cnt :
                                IWL_NUM_IDLE_CHAINS_SINGLE;
                        break;
                case WLAN_HT_CAP_SM_PS_INVALID:
                default:
                        IWL_ERR(priv, "invalid sm_ps mode %d\n",
                                priv->current_ht_config.sm_ps);
                        WARN_ON(1);
                        break;
                }
        }
        return idle_cnt;
}

/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
        u8 res;
        res = (chain_bitmap & BIT(0)) >> 0;
        res += (chain_bitmap & BIT(1)) >> 1;
        res += (chain_bitmap & BIT(2)) >> 2;
        res += (chain_bitmap & BIT(3)) >> 3;
        return res;
}

/**
 * iwl_is_monitor_mode - Determine if interface in monitor mode
 *
 * priv->iw_mode is set in add_interface, but add_interface is
 * never called for monitor mode. The only way mac80211 informs us about
 * monitor mode is through configuring filters (call to configure_filter).
 */
bool iwl_is_monitor_mode(struct iwl_priv *priv)
{
        return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
}
EXPORT_SYMBOL(iwl_is_monitor_mode);

/**
 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 *
 * Selects how many and which Rx receivers/antennas/chains to use.
 * This should not be used for scan command ... it puts data in wrong place.
 */
void iwl_set_rxon_chain(struct iwl_priv *priv)
{
        bool is_single = is_single_rx_stream(priv);
        bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
        u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
        u32 active_chains;
        u16 rx_chain;

        /* Tell uCode which antennas are actually connected.
         * Before first association, we assume all antennas are connected.
         * Just after first association, iwl_chain_noise_calibration()
         *    checks which antennas actually *are* connected. */
         if (priv->chain_noise_data.active_chains)
                active_chains = priv->chain_noise_data.active_chains;
        else
                active_chains = priv->hw_params.valid_rx_ant;

        rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;

        /* How many receivers should we use? */
        active_rx_cnt = iwl_get_active_rx_chain_count(priv);
        idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);


        /* correct rx chain count according hw settings
         * and chain noise calibration
         */
        valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
        if (valid_rx_cnt < active_rx_cnt)
                active_rx_cnt = valid_rx_cnt;

        if (valid_rx_cnt < idle_rx_cnt)
                idle_rx_cnt = valid_rx_cnt;

        rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
        rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;

        /* copied from 'iwl_bg_request_scan()' */
        /* Force use of chains B and C (0x6) for Rx for 4965
         * Avoid A (0x1) because of its off-channel reception on A-band.
         * MIMO is not used here, but value is required */
        if (iwl_is_monitor_mode(priv) &&
            !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
            ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
                rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
                rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
                rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
                rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
        }

        priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);

        if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
                priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
        else
                priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;

        IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
                        priv->staging_rxon.rx_chain,
                        active_rx_cnt, idle_rx_cnt);

        WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
                active_rx_cnt < idle_rx_cnt);
}
EXPORT_SYMBOL(iwl_set_rxon_chain);

/**
 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 * @channel: Any channel valid for the requested phymode

 * In addition to setting the staging RXON, priv->phymode is also set.
 *
 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 * in the staging RXON flag structure based on the phymode
 */
int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
{
        enum ieee80211_band band = ch->band;
        u16 channel = ieee80211_frequency_to_channel(ch->center_freq);

        if (!iwl_get_channel_info(priv, band, channel)) {
                IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
                               channel, band);
                return -EINVAL;
        }

        if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
            (priv->band == band))
                return 0;

        priv->staging_rxon.channel = cpu_to_le16(channel);
        if (band == IEEE80211_BAND_5GHZ)
                priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
        else
                priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;

        priv->band = band;

        IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);

        return 0;
}
EXPORT_SYMBOL(iwl_set_rxon_channel);

void iwl_set_flags_for_band(struct iwl_priv *priv,
                            enum ieee80211_band band)
{
        if (band == IEEE80211_BAND_5GHZ) {
                priv->staging_rxon.flags &=
                    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
                      | RXON_FLG_CCK_MSK);
                priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
        } else {
                /* Copied from iwl_post_associate() */
                if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
                        priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

                if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

                priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
                priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
                priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
        }
}

/*
 * initialize rxon structure with default values from eeprom
 */
void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
{
        const struct iwl_channel_info *ch_info;

        memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));

        switch (mode) {
        case NL80211_IFTYPE_AP:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
                break;

        case NL80211_IFTYPE_STATION:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
                priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
                break;

        case NL80211_IFTYPE_ADHOC:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
                priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
                priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
                                                  RXON_FILTER_ACCEPT_GRP_MSK;
                break;

        default:
                IWL_ERR(priv, "Unsupported interface type %d\n", mode);
                break;
        }

#if 0
        /* TODO:  Figure out when short_preamble would be set and cache from
         * that */
        if (!hw_to_local(priv->hw)->short_preamble)
                priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
        else
                priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

        ch_info = iwl_get_channel_info(priv, priv->band,
                                       le16_to_cpu(priv->active_rxon.channel));

        if (!ch_info)
                ch_info = &priv->channel_info[0];

        /*
         * in some case A channels are all non IBSS
         * in this case force B/G channel
         */
        if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
            !(is_channel_ibss(ch_info)))
                ch_info = &priv->channel_info[0];

        priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
        priv->band = ch_info->band;

        iwl_set_flags_for_band(priv, priv->band);

        priv->staging_rxon.ofdm_basic_rates =
            (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
        priv->staging_rxon.cck_basic_rates =
            (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

        /* clear both MIX and PURE40 mode flag */
        priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
                                        RXON_FLG_CHANNEL_MODE_PURE_40);
        memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
        memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
        priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
        priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
        priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
}
EXPORT_SYMBOL(iwl_connection_init_rx_config);

static void iwl_set_rate(struct iwl_priv *priv)
{
        const struct ieee80211_supported_band *hw = NULL;
        struct ieee80211_rate *rate;
        int i;

        hw = iwl_get_hw_mode(priv, priv->band);
        if (!hw) {
                IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
                return;
        }

        priv->active_rate = 0;
        priv->active_rate_basic = 0;

        for (i = 0; i < hw->n_bitrates; i++) {
                rate = &(hw->bitrates[i]);
                if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
                        priv->active_rate |= (1 << rate->hw_value);
        }

        IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
                       priv->active_rate, priv->active_rate_basic);

        /*
         * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
         * otherwise set it to the default of all CCK rates and 6, 12, 24 for
         * OFDM
         */
        if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
                priv->staging_rxon.cck_basic_rates =
                    ((priv->active_rate_basic &
                      IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
        else
                priv->staging_rxon.cck_basic_rates =
                    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

        if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
                priv->staging_rxon.ofdm_basic_rates =
                    ((priv->active_rate_basic &
                      (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
                      IWL_FIRST_OFDM_RATE) & 0xFF;
        else
                priv->staging_rxon.ofdm_basic_rates =
                   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}

void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
        struct iwl_csa_notification *csa = &(pkt->u.csa_notif);

        if (!le32_to_cpu(csa->status)) {
                rxon->channel = csa->channel;
                priv->staging_rxon.channel = csa->channel;
                IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
                      le16_to_cpu(csa->channel));
        } else
                IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
                      le16_to_cpu(csa->channel));
}
EXPORT_SYMBOL(iwl_rx_csa);

#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
{
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

        IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
        iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
        IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
        IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
        IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
                        le32_to_cpu(rxon->filter_flags));
        IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
        IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
                        rxon->ofdm_basic_rates);
        IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
        IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
        IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
        IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif
/**
 * iwl_irq_handle_error - called for HW or SW error interrupt from card
 */
void iwl_irq_handle_error(struct iwl_priv *priv)
{
        /* Set the FW error flag -- cleared on iwl_down */
        set_bit(STATUS_FW_ERROR, &priv->status);

        /* Cancel currently queued command. */
        clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

#ifdef CONFIG_IWLWIFI_DEBUG
        if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
                priv->cfg->ops->lib->dump_nic_error_log(priv);
                priv->cfg->ops->lib->dump_nic_event_log(priv);
                iwl_print_rx_config_cmd(priv);
        }
#endif

        wake_up_interruptible(&priv->wait_command_queue);

        /* Keep the restart process from trying to send host
         * commands by clearing the INIT status bit */
        clear_bit(STATUS_READY, &priv->status);

        if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
                IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
                          "Restarting adapter due to uCode error.\n");

                if (priv->cfg->mod_params->restart_fw)
                        queue_work(priv->workqueue, &priv->restart);
        }
}
EXPORT_SYMBOL(iwl_irq_handle_error);

int iwl_apm_stop_master(struct iwl_priv *priv)
{
        int ret = 0;

        /* stop device's busmaster DMA activity */
        iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);

        ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
                        CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
        if (ret)
                IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");

        IWL_DEBUG_INFO(priv, "stop master\n");

        return ret;
}
EXPORT_SYMBOL(iwl_apm_stop_master);

void iwl_apm_stop(struct iwl_priv *priv)
{
        IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");

        /* Stop device's DMA activity */
        iwl_apm_stop_master(priv);

        /* Reset the entire device */
        iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);

        udelay(10);

        /*
         * Clear "initialization complete" bit to move adapter from
         * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
         */
        iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
}
EXPORT_SYMBOL(iwl_apm_stop);


/*
 * Start up NIC's basic functionality after it has been reset
 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
 * NOTE:  This does not load uCode nor start the embedded processor
 */
int iwl_apm_init(struct iwl_priv *priv)
{
        int ret = 0;
        u16 lctl;

        IWL_DEBUG_INFO(priv, "Init card's basic functions\n");

        /*
         * Use "set_bit" below rather than "write", to preserve any hardware
         * bits already set by default after reset.
         */

        /* Disable L0S exit timer (platform NMI Work/Around) */
        iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
                          CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);

        /*
         * Disable L0s without affecting L1;
         *  don't wait for ICH L0s (ICH bug W/A)
         */
        iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
                          CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);

        /* Set FH wait threshold to maximum (HW error during stress W/A) */
        iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);

        /*
         * Enable HAP INTA (interrupt from management bus) to
         * wake device's PCI Express link L1a -> L0s
         * NOTE:  This is no-op for 3945 (non-existant bit)
         */
        iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
                                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);

        /*
         * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
         * Check if BIOS (or OS) enabled L1-ASPM on this device.
         * If so (likely), disable L0S, so device moves directly L0->L1;
         *    costs negligible amount of power savings.
         * If not (unlikely), enable L0S, so there is at least some
         *    power savings, even without L1.
         */
        if (priv->cfg->set_l0s) {
                lctl = iwl_pcie_link_ctl(priv);
                if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
                                        PCI_CFG_LINK_CTRL_VAL_L1_EN) {
                        /* L1-ASPM enabled; disable(!) L0S  */
                        iwl_set_bit(priv, CSR_GIO_REG,
                                        CSR_GIO_REG_VAL_L0S_ENABLED);
                        IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
                } else {
                        /* L1-ASPM disabled; enable(!) L0S */
                        iwl_clear_bit(priv, CSR_GIO_REG,
                                        CSR_GIO_REG_VAL_L0S_ENABLED);
                        IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
                }
        }

        /* Configure analog phase-lock-loop before activating to D0A */
        if (priv->cfg->pll_cfg_val)
                iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);

        /*
         * Set "initialization complete" bit to move adapter from
         * D0U* --> D0A* (powered-up active) state.
         */
        iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);

        /*
         * Wait for clock stabilization; once stabilized, access to
         * device-internal resources is supported, e.g. iwl_write_prph()
         * and accesses to uCode SRAM.
         */
        ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
                        CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
                        CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
        if (ret < 0) {
                IWL_DEBUG_INFO(priv, "Failed to init the card\n");
                goto out;
        }

        /*
         * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
         * BSM (Boostrap State Machine) is only in 3945 and 4965;
         * later devices (i.e. 5000 and later) have non-volatile SRAM,
         * and don't need BSM to restore data after power-saving sleep.
         *
         * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
         * do not disable clocks.  This preserves any hardware bits already
         * set by default in "CLK_CTRL_REG" after reset.
         */
        if (priv->cfg->use_bsm)
                iwl_write_prph(priv, APMG_CLK_EN_REG,
                        APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
        else
                iwl_write_prph(priv, APMG_CLK_EN_REG,
                        APMG_CLK_VAL_DMA_CLK_RQT);
        udelay(20);

        /* Disable L1-Active */
        iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);

out:
        return ret;
}
EXPORT_SYMBOL(iwl_apm_init);



void iwl_configure_filter(struct ieee80211_hw *hw,
                          unsigned int changed_flags,
                          unsigned int *total_flags,
                          u64 multicast)
{
        struct iwl_priv *priv = hw->priv;
        __le32 *filter_flags = &priv->staging_rxon.filter_flags;

        IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
                        changed_flags, *total_flags);

        if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
                if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
                        *filter_flags |= RXON_FILTER_PROMISC_MSK;
                else
                        *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
        }
        if (changed_flags & FIF_ALLMULTI) {
                if (*total_flags & FIF_ALLMULTI)
                        *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
                else
                        *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
        }
        if (changed_flags & FIF_CONTROL) {
                if (*total_flags & FIF_CONTROL)
                        *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
                else
                        *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
        }
        if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
                if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
                        *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
                else
                        *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
        }

        /* We avoid iwl_commit_rxon here to commit the new filter flags
         * since mac80211 will call ieee80211_hw_config immediately.
         * (mc_list is not supported at this time). Otherwise, we need to
         * queue a background iwl_commit_rxon work.
         */

        *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
                        FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}
EXPORT_SYMBOL(iwl_configure_filter);

int iwl_set_hw_params(struct iwl_priv *priv)
{
        priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
        priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
        if (priv->cfg->mod_params->amsdu_size_8K)
                priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
        else
                priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);

        priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;

        if (priv->cfg->mod_params->disable_11n)
                priv->cfg->sku &= ~IWL_SKU_N;

        /* Device-specific setup */
        return priv->cfg->ops->lib->set_hw_params(priv);
}
EXPORT_SYMBOL(iwl_set_hw_params);

int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
        int ret = 0;
        s8 prev_tx_power = priv->tx_power_user_lmt;

        if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
                IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
                         tx_power,
                         IWL_TX_POWER_TARGET_POWER_MIN);
                return -EINVAL;
        }

        if (tx_power > priv->tx_power_device_lmt) {
                IWL_WARN(priv,
                        "Requested user TXPOWER %d above upper limit %d.\n",
                         tx_power, priv->tx_power_device_lmt);
                return -EINVAL;
        }

        if (priv->tx_power_user_lmt != tx_power)
                force = true;

        /* if nic is not up don't send command */
        if (iwl_is_ready_rf(priv)) {
                priv->tx_power_user_lmt = tx_power;
                if (force && priv->cfg->ops->lib->send_tx_power)
                        ret = priv->cfg->ops->lib->send_tx_power(priv);
                else if (!priv->cfg->ops->lib->send_tx_power)
                        ret = -EOPNOTSUPP;
                /*
                 * if fail to set tx_power, restore the orig. tx power
                 */
                if (ret)
                        priv->tx_power_user_lmt = prev_tx_power;
        }

        /*
         * Even this is an async host command, the command
         * will always report success from uCode
         * So once driver can placing the command into the queue
         * successfully, driver can use priv->tx_power_user_lmt
         * to reflect the current tx power
         */
        return ret;
}
EXPORT_SYMBOL(iwl_set_tx_power);

#define ICT_COUNT (PAGE_SIZE/sizeof(u32))

/* Free dram table */
void iwl_free_isr_ict(struct iwl_priv *priv)
{
        if (priv->ict_tbl_vir) {
                pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
                                        PAGE_SIZE, priv->ict_tbl_vir,
                                        priv->ict_tbl_dma);
                priv->ict_tbl_vir = NULL;
        }
}
EXPORT_SYMBOL(iwl_free_isr_ict);


/* allocate dram shared table it is a PAGE_SIZE aligned
 * also reset all data related to ICT table interrupt.
 */
int iwl_alloc_isr_ict(struct iwl_priv *priv)
{

        if (priv->cfg->use_isr_legacy)
                return 0;
        /* allocate shrared data table */
        priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
                                                  ICT_COUNT) + PAGE_SIZE,
                                                  &priv->ict_tbl_dma);
        if (!priv->ict_tbl_vir)
                return -ENOMEM;

        /* align table to PAGE_SIZE boundry */
        priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);

        IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
                             (unsigned long long)priv->ict_tbl_dma,
                             (unsigned long long)priv->aligned_ict_tbl_dma,
                        (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));

        priv->ict_tbl =  priv->ict_tbl_vir +
                          (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);

        IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
                             priv->ict_tbl, priv->ict_tbl_vir,
                        (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));

        /* reset table and index to all 0 */
        memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
        priv->ict_index = 0;

        /* add periodic RX interrupt */
        priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
        return 0;
}
EXPORT_SYMBOL(iwl_alloc_isr_ict);

/* Device is going up inform it about using ICT interrupt table,
 * also we need to tell the driver to start using ICT interrupt.
 */
int iwl_reset_ict(struct iwl_priv *priv)
{
        u32 val;
        unsigned long flags;

        if (!priv->ict_tbl_vir)
                return 0;

        spin_lock_irqsave(&priv->lock, flags);
        iwl_disable_interrupts(priv);

        memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);

        val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;

        val |= CSR_DRAM_INT_TBL_ENABLE;
        val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;

        IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
                        "aligned dma address %Lx\n",
                        val, (unsigned long long)priv->aligned_ict_tbl_dma);

        iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
        priv->use_ict = true;
        priv->ict_index = 0;
        iwl_write32(priv, CSR_INT, priv->inta_mask);
        iwl_enable_interrupts(priv);
        spin_unlock_irqrestore(&priv->lock, flags);

        return 0;
}
EXPORT_SYMBOL(iwl_reset_ict);

/* Device is going down disable ict interrupt usage */
void iwl_disable_ict(struct iwl_priv *priv)
{
        unsigned long flags;

        spin_lock_irqsave(&priv->lock, flags);
        priv->use_ict = false;
        spin_unlock_irqrestore(&priv->lock, flags);
}
EXPORT_SYMBOL(iwl_disable_ict);

/* interrupt handler using ict table, with this interrupt driver will
 * stop using INTA register to get device's interrupt, reading this register
 * is expensive, device will write interrupts in ICT dram table, increment
 * index then will fire interrupt to driver, driver will OR all ICT table
 * entries from current index up to table entry with 0 value. the result is
 * the interrupt we need to service, driver will set the entries back to 0 and
 * set index.
 */
irqreturn_t iwl_isr_ict(int irq, void *data)
{
        struct iwl_priv *priv = data;
        u32 inta, inta_mask;
        u32 val = 0;

        if (!priv)
                return IRQ_NONE;

        /* dram interrupt table not set yet,
         * use legacy interrupt.
         */
        if (!priv->use_ict)
                return iwl_isr(irq, data);

        spin_lock(&priv->lock);

        /* Disable (but don't clear!) interrupts here to avoid
         * back-to-back ISRs and sporadic interrupts from our NIC.
         * If we have something to service, the tasklet will re-enable ints.
         * If we *don't* have something, we'll re-enable before leaving here.
         */
        inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
        iwl_write32(priv, CSR_INT_MASK, 0x00000000);


        /* Ignore interrupt if there's nothing in NIC to service.
         * This may be due to IRQ shared with another device,
         * or due to sporadic interrupts thrown from our NIC. */
        if (!priv->ict_tbl[priv->ict_index]) {
                IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
                goto none;
        }

        /* read all entries that not 0 start with ict_index */
        while (priv->ict_tbl[priv->ict_index]) {

                val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
                IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
                                priv->ict_index,
                                le32_to_cpu(priv->ict_tbl[priv->ict_index]));
                priv->ict_tbl[priv->ict_index] = 0;
                priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
                                                     ICT_COUNT);

        }

        /* We should not get this value, just ignore it. */
        if (val == 0xffffffff)
                val = 0;

        inta = (0xff & val) | ((0xff00 & val) << 16);
        IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
                        inta, inta_mask, val);

        inta &= priv->inta_mask;
        priv->inta |= inta;

        /* iwl_irq_tasklet() will service interrupts and re-enable them */
        if (likely(inta))
                tasklet_schedule(&priv->irq_tasklet);
        else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
                /* Allow interrupt if was disabled by this handler and
                 * no tasklet was schedules, We should not enable interrupt,
                 * tasklet will enable it.
                 */
                iwl_enable_interrupts(priv);
        }

        spin_unlock(&priv->lock);
        return IRQ_HANDLED;

 none:
        /* re-enable interrupts here since we don't have anything to service.
         * only Re-enable if disabled by irq.
         */
        if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
                iwl_enable_interrupts(priv);

        spin_unlock(&priv->lock);
        return IRQ_NONE;
}
EXPORT_SYMBOL(iwl_isr_ict);


static irqreturn_t iwl_isr(int irq, void *data)
{
        struct iwl_priv *priv = data;
        u32 inta, inta_mask;
#ifdef CONFIG_IWLWIFI_DEBUG
        u32 inta_fh;
#endif
        if (!priv)
                return IRQ_NONE;

        spin_lock(&priv->lock);

        /* Disable (but don't clear!) interrupts here to avoid
         *    back-to-back ISRs and sporadic interrupts from our NIC.
         * If we have something to service, the tasklet will re-enable ints.
         * If we *don't* have something, we'll re-enable before leaving here. */
        inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
        iwl_write32(priv, CSR_INT_MASK, 0x00000000);

        /* Discover which interrupts are active/pending */
        inta = iwl_read32(priv, CSR_INT);

        /* Ignore interrupt if there's nothing in NIC to service.
         * This may be due to IRQ shared with another device,
         * or due to sporadic interrupts thrown from our NIC. */
        if (!inta) {
                IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
                goto none;
        }

        if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
                /* Hardware disappeared. It might have already raised
                 * an interrupt */
                IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
                goto unplugged;
        }

#ifdef CONFIG_IWLWIFI_DEBUG
        if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
                inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
                IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
                              "fh 0x%08x\n", inta, inta_mask, inta_fh);
        }
#endif

        priv->inta |= inta;
        /* iwl_irq_tasklet() will service interrupts and re-enable them */
        if (likely(inta))
                tasklet_schedule(&priv->irq_tasklet);
        else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
                iwl_enable_interrupts(priv);

 unplugged:
        spin_unlock(&priv->lock);
        return IRQ_HANDLED;

 none:
        /* re-enable interrupts here since we don't have anything to service. */
        /* only Re-enable if diabled by irq  and no schedules tasklet. */
        if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
                iwl_enable_interrupts(priv);

        spin_unlock(&priv->lock);
        return IRQ_NONE;
}

irqreturn_t iwl_isr_legacy(int irq, void *data)
{
        struct iwl_priv *priv = data;
        u32 inta, inta_mask;
        u32 inta_fh;
        if (!priv)
                return IRQ_NONE;

        spin_lock(&priv->lock);

        /* Disable (but don't clear!) interrupts here to avoid
         *    back-to-back ISRs and sporadic interrupts from our NIC.
         * If we have something to service, the tasklet will re-enable ints.
         * If we *don't* have something, we'll re-enable before leaving here. */
        inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
        iwl_write32(priv, CSR_INT_MASK, 0x00000000);

        /* Discover which interrupts are active/pending */
        inta = iwl_read32(priv, CSR_INT);
        inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);

        /* Ignore interrupt if there's nothing in NIC to service.
         * This may be due to IRQ shared with another device,
         * or due to sporadic interrupts thrown from our NIC. */
        if (!inta && !inta_fh) {
                IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
                goto none;
        }

        if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
                /* Hardware disappeared. It might have already raised
                 * an interrupt */
                IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
                goto unplugged;
        }

        IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
                      inta, inta_mask, inta_fh);

        inta &= ~CSR_INT_BIT_SCD;

        /* iwl_irq_tasklet() will service interrupts and re-enable them */
        if (likely(inta || inta_fh))
                tasklet_schedule(&priv->irq_tasklet);

 unplugged:
        spin_unlock(&priv->lock);
        return IRQ_HANDLED;

 none:
        /* re-enable interrupts here since we don't have anything to service. */
        /* only Re-enable if diabled by irq */
        if (test_bit(STATUS_INT_ENABLED, &priv->status))
                iwl_enable_interrupts(priv);
        spin_unlock(&priv->lock);
        return IRQ_NONE;
}
EXPORT_SYMBOL(iwl_isr_legacy);

int iwl_send_bt_config(struct iwl_priv *priv)
{
        struct iwl_bt_cmd bt_cmd = {
                .flags = BT_COEX_MODE_4W,
                .lead_time = BT_LEAD_TIME_DEF,
                .max_kill = BT_MAX_KILL_DEF,
                .kill_ack_mask = 0,
                .kill_cts_mask = 0,
        };

        return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
                                sizeof(struct iwl_bt_cmd), &bt_cmd);
}
EXPORT_SYMBOL(iwl_send_bt_config);

int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
{
        u32 stat_flags = 0;
        struct iwl_host_cmd cmd = {
                .id = REPLY_STATISTICS_CMD,
                .flags = flags,
                .len = sizeof(stat_flags),
                .data = (u8 *) &stat_flags,
        };
        return iwl_send_cmd(priv, &cmd);
}
EXPORT_SYMBOL(iwl_send_statistics_request);

/**
 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
 *   using sample data 100 bytes apart.  If these sample points are good,
 *   it's a pretty good bet that everything between them is good, too.
 */
static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
        u32 val;
        int ret = 0;
        u32 errcnt = 0;
        u32 i;

        IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);

        for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
                /* read data comes through single port, auto-incr addr */
                /* NOTE: Use the debugless read so we don't flood kernel log
                 * if IWL_DL_IO is set */
                iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
                        i + IWL49_RTC_INST_LOWER_BOUND);
                val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
                if (val != le32_to_cpu(*image)) {
                        ret = -EIO;
                        errcnt++;
                        if (errcnt >= 3)
                                break;
                }
        }

        return ret;
}

/**
 * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
 *     looking at all data.
 */
static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
                                 u32 len)
{
        u32 val;
        u32 save_len = len;
        int ret = 0;
        u32 errcnt;

        IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);

        iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
                           IWL49_RTC_INST_LOWER_BOUND);

        errcnt = 0;
        for (; len > 0; len -= sizeof(u32), image++) {
                /* read data comes through single port, auto-incr addr */
                /* NOTE: Use the debugless read so we don't flood kernel log
                 * if IWL_DL_IO is set */
                val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
                if (val != le32_to_cpu(*image)) {
                        IWL_ERR(priv, "uCode INST section is invalid at "
                                  "offset 0x%x, is 0x%x, s/b 0x%x\n",
                                  save_len - len, val, le32_to_cpu(*image));
                        ret = -EIO;
                        errcnt++;
                        if (errcnt >= 20)
                                break;
                }
        }

        if (!errcnt)
                IWL_DEBUG_INFO(priv,
                    "ucode image in INSTRUCTION memory is good\n");

        return ret;
}

/**
 * iwl_verify_ucode - determine which instruction image is in SRAM,
 *    and verify its contents
 */
int iwl_verify_ucode(struct iwl_priv *priv)
{
        __le32 *image;
        u32 len;
        int ret;

        /* Try bootstrap */
        image = (__le32 *)priv->ucode_boot.v_addr;
        len = priv->ucode_boot.len;
        ret = iwlcore_verify_inst_sparse(priv, image, len);
        if (!ret) {
                IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
                return 0;
        }

        /* Try initialize */
        image = (__le32 *)priv->ucode_init.v_addr;
        len = priv->ucode_init.len;
        ret = iwlcore_verify_inst_sparse(priv, image, len);
        if (!ret) {
                IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
                return 0;
        }

        /* Try runtime/protocol */
        image = (__le32 *)priv->ucode_code.v_addr;
        len = priv->ucode_code.len;
        ret = iwlcore_verify_inst_sparse(priv, image, len);
        if (!ret) {
                IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
                return 0;
        }

        IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");

        /* Since nothing seems to match, show first several data entries in
         * instruction SRAM, so maybe visual inspection will give a clue.
         * Selection of bootstrap image (vs. other images) is arbitrary. */
        image = (__le32 *)priv->ucode_boot.v_addr;
        len = priv->ucode_boot.len;
        ret = iwl_verify_inst_full(priv, image, len);

        return ret;
}
EXPORT_SYMBOL(iwl_verify_ucode);


void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
        struct iwl_ct_kill_config cmd;
        struct iwl_ct_kill_throttling_config adv_cmd;
        unsigned long flags;
        int ret = 0;

        spin_lock_irqsave(&priv->lock, flags);
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
                    CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
        spin_unlock_irqrestore(&priv->lock, flags);
        priv->thermal_throttle.ct_kill_toggle = false;

        if (priv->cfg->support_ct_kill_exit) {
                adv_cmd.critical_temperature_enter =
                        cpu_to_le32(priv->hw_params.ct_kill_threshold);
                adv_cmd.critical_temperature_exit =
                        cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);

                ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
                                       sizeof(adv_cmd), &adv_cmd);
                if (ret)
                        IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
                else
                        IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
                                        "succeeded, "
                                        "critical temperature enter is %d,"
                                        "exit is %d\n",
                                       priv->hw_params.ct_kill_threshold,
                                       priv->hw_params.ct_kill_exit_threshold);
        } else {
                cmd.critical_temperature_R =
                        cpu_to_le32(priv->hw_params.ct_kill_threshold);

                ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
                                       sizeof(cmd), &cmd);
                if (ret)
                        IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
                else
                        IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
                                        "succeeded, "
                                        "critical temperature is %d\n",
                                        priv->hw_params.ct_kill_threshold);
        }
}
EXPORT_SYMBOL(iwl_rf_kill_ct_config);


/*
 * CARD_STATE_CMD
 *
 * Use: Sets the device's internal card state to enable, disable, or halt
 *
 * When in the 'enable' state the card operates as normal.
 * When in the 'disable' state, the card enters into a low power mode.
 * When in the 'halt' state, the card is shut down and must be fully
 * restarted to come back on.
 */
int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
{
        struct iwl_host_cmd cmd = {
                .id = REPLY_CARD_STATE_CMD,
                .len = sizeof(u32),
                .data = &flags,
                .flags = meta_flag,
        };

        return iwl_send_cmd(priv, &cmd);
}

void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
                           struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
        IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
                     sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}
EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);

void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
                                      struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
        IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
                        "notification for %s:\n", len,
                        get_cmd_string(pkt->hdr.cmd));
        iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
}
EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);

void iwl_rx_reply_error(struct iwl_priv *priv,
                        struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);

        IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
                "seq 0x%04X ser 0x%08X\n",
                le32_to_cpu(pkt->u.err_resp.error_type),
                get_cmd_string(pkt->u.err_resp.cmd_id),
                pkt->u.err_resp.cmd_id,
                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
                le32_to_cpu(pkt->u.err_resp.error_info));
}
EXPORT_SYMBOL(iwl_rx_reply_error);

void iwl_clear_isr_stats(struct iwl_priv *priv)
{
        memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
}

int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
                           const struct ieee80211_tx_queue_params *params)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;
        int q;

        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;

        spin_lock_irqsave(&priv->lock, flags);

        priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
        priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
        priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
        priv->qos_data.def_qos_parm.ac[q].edca_txop =
                        cpu_to_le16((params->txop * 32));

        priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
        priv->qos_data.qos_active = 1;

        if (priv->iw_mode == NL80211_IFTYPE_AP)
                iwl_activate_qos(priv, 1);
        else if (priv->assoc_id && iwl_is_associated(priv))
                iwl_activate_qos(priv, 0);

        spin_unlock_irqrestore(&priv->lock, flags);

        IWL_DEBUG_MAC80211(priv, "leave\n");
        return 0;
}
EXPORT_SYMBOL(iwl_mac_conf_tx);

static void iwl_ht_conf(struct iwl_priv *priv,
                        struct ieee80211_bss_conf *bss_conf)
{
        struct iwl_ht_config *ht_conf = &priv->current_ht_config;
        struct ieee80211_sta *sta;

        IWL_DEBUG_MAC80211(priv, "enter: \n");

        if (!ht_conf->is_ht)
                return;

        ht_conf->ht_protection =
                bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
        ht_conf->non_GF_STA_present =
                !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);

        ht_conf->single_chain_sufficient = false;

        switch (priv->iw_mode) {
        case NL80211_IFTYPE_STATION:
                rcu_read_lock();
                sta = ieee80211_find_sta(priv->vif, priv->bssid);
                if (sta) {
                        struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
                        int maxstreams;

                        maxstreams = (ht_cap->mcs.tx_params &
                                      IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
                                        >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
                        maxstreams += 1;

                        ht_conf->sm_ps =
                                (u8)((ht_cap->cap & IEEE80211_HT_CAP_SM_PS)
                                >> 2);
                        IWL_DEBUG_MAC80211(priv, "sm_ps: 0x%x\n",
                                ht_conf->sm_ps);

                        if ((ht_cap->mcs.rx_mask[1] == 0) &&
                            (ht_cap->mcs.rx_mask[2] == 0))
                                ht_conf->single_chain_sufficient = true;
                        if (maxstreams <= 1)
                                ht_conf->single_chain_sufficient = true;
                } else {
                        /*
                         * If at all, this can only happen through a race
                         * when the AP disconnects us while we're still
                         * setting up the connection, in that case mac80211
                         * will soon tell us about that.
                         */
                        ht_conf->single_chain_sufficient = true;
                }
                rcu_read_unlock();
                break;
        case NL80211_IFTYPE_ADHOC:
                ht_conf->single_chain_sufficient = true;
                break;
        default:
                break;
        }

        IWL_DEBUG_MAC80211(priv, "leave\n");
}

#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
void iwl_bss_info_changed(struct ieee80211_hw *hw,
                          struct ieee80211_vif *vif,
                          struct ieee80211_bss_conf *bss_conf,
                          u32 changes)
{
        struct iwl_priv *priv = hw->priv;
        int ret;

        IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);

        if (!iwl_is_alive(priv))
                return;

        mutex_lock(&priv->mutex);

        if (changes & BSS_CHANGED_BEACON &&
            priv->iw_mode == NL80211_IFTYPE_AP) {
                dev_kfree_skb(priv->ibss_beacon);
                priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
        }

        if (changes & BSS_CHANGED_BEACON_INT) {
                priv->beacon_int = bss_conf->beacon_int;
                /* TODO: in AP mode, do something to make this take effect */
        }

        if (changes & BSS_CHANGED_BSSID) {
                IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);

                /*
                 * If there is currently a HW scan going on in the
                 * background then we need to cancel it else the RXON
                 * below/in post_associate will fail.
                 */
                if (iwl_scan_cancel_timeout(priv, 100)) {
                        IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
                        IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
                        mutex_unlock(&priv->mutex);
                        return;
                }

                /* mac80211 only sets assoc when in STATION mode */
                if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
                    bss_conf->assoc) {
                        memcpy(priv->staging_rxon.bssid_addr,
                               bss_conf->bssid, ETH_ALEN);

                        /* currently needed in a few places */
                        memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
                } else {
                        priv->staging_rxon.filter_flags &=
                                ~RXON_FILTER_ASSOC_MSK;
                }

        }

        /*
         * This needs to be after setting the BSSID in case
         * mac80211 decides to do both changes at once because
         * it will invoke post_associate.
         */
        if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
            changes & BSS_CHANGED_BEACON) {
                struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);

                if (beacon)
                        iwl_mac_beacon_update(hw, beacon);
        }

        if (changes & BSS_CHANGED_ERP_PREAMBLE) {
                IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
                                   bss_conf->use_short_preamble);
                if (bss_conf->use_short_preamble)
                        priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
        }

        if (changes & BSS_CHANGED_ERP_CTS_PROT) {
                IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
                if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
                        priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
        }

        if (changes & BSS_CHANGED_BASIC_RATES) {
                /* XXX use this information
                 *
                 * To do that, remove code from iwl_set_rate() and put something
                 * like this here:
                 *
                if (A-band)
                        priv->staging_rxon.ofdm_basic_rates =
                                bss_conf->basic_rates;
                else
                        priv->staging_rxon.ofdm_basic_rates =
                                bss_conf->basic_rates >> 4;
                        priv->staging_rxon.cck_basic_rates =
                                bss_conf->basic_rates & 0xF;
                 */
        }

        if (changes & BSS_CHANGED_HT) {
                iwl_ht_conf(priv, bss_conf);

                if (priv->cfg->ops->hcmd->set_rxon_chain)
                        priv->cfg->ops->hcmd->set_rxon_chain(priv);
        }

        if (changes & BSS_CHANGED_ASSOC) {
                IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
                if (bss_conf->assoc) {
                        priv->assoc_id = bss_conf->aid;
                        priv->beacon_int = bss_conf->beacon_int;
                        priv->timestamp = bss_conf->timestamp;
                        priv->assoc_capability = bss_conf->assoc_capability;

                        iwl_led_associate(priv);

                        /*
                         * We have just associated, don't start scan too early
                         * leave time for EAPOL exchange to complete.
                         *
                         * XXX: do this in mac80211
                         */
                        priv->next_scan_jiffies = jiffies +
                                        IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
                        if (!iwl_is_rfkill(priv))
                                priv->cfg->ops->lib->post_associate(priv);
                } else {
                        priv->assoc_id = 0;
                        iwl_led_disassociate(priv);
                }
        }

        if (changes && iwl_is_associated(priv) && priv->assoc_id) {
                IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
                                   changes);
                ret = iwl_send_rxon_assoc(priv);
                if (!ret) {
                        /* Sync active_rxon with latest change. */
                        memcpy((void *)&priv->active_rxon,
                                &priv->staging_rxon,
                                sizeof(struct iwl_rxon_cmd));
                }
        }

        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_bss_info_changed);

int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;
        __le64 timestamp;

        IWL_DEBUG_MAC80211(priv, "enter\n");

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
                return -EIO;
        }

        if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
                IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
                return -EIO;
        }

        spin_lock_irqsave(&priv->lock, flags);

        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);

        priv->ibss_beacon = skb;

        priv->assoc_id = 0;
        timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
        priv->timestamp = le64_to_cpu(timestamp);

        IWL_DEBUG_MAC80211(priv, "leave\n");
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_reset_qos(priv);

        priv->cfg->ops->lib->post_associate(priv);


        return 0;
}
EXPORT_SYMBOL(iwl_mac_beacon_update);

int iwl_set_mode(struct iwl_priv *priv, int mode)
{
        if (mode == NL80211_IFTYPE_ADHOC) {
                const struct iwl_channel_info *ch_info;

                ch_info = iwl_get_channel_info(priv,
                        priv->band,
                        le16_to_cpu(priv->staging_rxon.channel));

                if (!ch_info || !is_channel_ibss(ch_info)) {
                        IWL_ERR(priv, "channel %d not IBSS channel\n",
                                  le16_to_cpu(priv->staging_rxon.channel));
                        return -EINVAL;
                }
        }

        iwl_connection_init_rx_config(priv, mode);

        if (priv->cfg->ops->hcmd->set_rxon_chain)
                priv->cfg->ops->hcmd->set_rxon_chain(priv);

        memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);

        iwl_clear_stations_table(priv);

        /* dont commit rxon if rf-kill is on*/
        if (!iwl_is_ready_rf(priv))
                return -EAGAIN;

        iwlcore_commit_rxon(priv);

        return 0;
}
EXPORT_SYMBOL(iwl_set_mode);

int iwl_mac_add_interface(struct ieee80211_hw *hw,
                                 struct ieee80211_if_init_conf *conf)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;

        IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);

        if (priv->vif) {
                IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
                return -EOPNOTSUPP;
        }

        spin_lock_irqsave(&priv->lock, flags);
        priv->vif = conf->vif;
        priv->iw_mode = conf->type;

        spin_unlock_irqrestore(&priv->lock, flags);

        mutex_lock(&priv->mutex);

        if (conf->mac_addr) {
                IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
                memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
        }

        if (iwl_set_mode(priv, conf->type) == -EAGAIN)
                /* we are not ready, will run again when ready */
                set_bit(STATUS_MODE_PENDING, &priv->status);

        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211(priv, "leave\n");
        return 0;
}
EXPORT_SYMBOL(iwl_mac_add_interface);

void iwl_mac_remove_interface(struct ieee80211_hw *hw,
                                     struct ieee80211_if_init_conf *conf)
{
        struct iwl_priv *priv = hw->priv;

        IWL_DEBUG_MAC80211(priv, "enter\n");

        mutex_lock(&priv->mutex);

        if (iwl_is_ready_rf(priv)) {
                iwl_scan_cancel_timeout(priv, 100);
                priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
                iwlcore_commit_rxon(priv);
        }
        if (priv->vif == conf->vif) {
                priv->vif = NULL;
                memset(priv->bssid, 0, ETH_ALEN);
        }
        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211(priv, "leave\n");

}
EXPORT_SYMBOL(iwl_mac_remove_interface);

/**
 * iwl_mac_config - mac80211 config callback
 *
 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
 * be set inappropriately and the driver currently sets the hardware up to
 * use it whenever needed.
 */
int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
{
        struct iwl_priv *priv = hw->priv;
        const struct iwl_channel_info *ch_info;
        struct ieee80211_conf *conf = &hw->conf;
        struct iwl_ht_config *ht_conf = &priv->current_ht_config;
        unsigned long flags = 0;
        int ret = 0;
        u16 ch;
        int scan_active = 0;

        mutex_lock(&priv->mutex);

        IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
                                        conf->channel->hw_value, changed);

        if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
                        test_bit(STATUS_SCANNING, &priv->status))) {
                scan_active = 1;
                IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
        }


        /* during scanning mac80211 will delay channel setting until
         * scan finish with changed = 0
         */
        if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
                if (scan_active)
                        goto set_ch_out;

                ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
                ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
                if (!is_channel_valid(ch_info)) {
                        IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
                        ret = -EINVAL;
                        goto set_ch_out;
                }

                if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
                        !is_channel_ibss(ch_info)) {
                        IWL_ERR(priv, "channel %d in band %d not "
                                "IBSS channel\n",
                                conf->channel->hw_value, conf->channel->band);
                        ret = -EINVAL;
                        goto set_ch_out;
                }

                if (iwl_is_associated(priv) &&
                    (le16_to_cpu(priv->active_rxon.channel) != ch) &&
                    priv->cfg->ops->lib->set_channel_switch) {
                        ret = priv->cfg->ops->lib->set_channel_switch(priv,
                                ch);
                        goto out;
                }

                spin_lock_irqsave(&priv->lock, flags);

                /* Configure HT40 channels */
                ht_conf->is_ht = conf_is_ht(conf);
                if (ht_conf->is_ht) {
                        if (conf_is_ht40_minus(conf)) {
                                ht_conf->extension_chan_offset =
                                        IEEE80211_HT_PARAM_CHA_SEC_BELOW;
                                ht_conf->is_40mhz = true;
                        } else if (conf_is_ht40_plus(conf)) {
                                ht_conf->extension_chan_offset =
                                        IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
                                ht_conf->is_40mhz = true;
                        } else {
                                ht_conf->extension_chan_offset =
                                        IEEE80211_HT_PARAM_CHA_SEC_NONE;
                                ht_conf->is_40mhz = false;
                        }
                } else
                        ht_conf->is_40mhz = false;
                /* Default to no protection. Protection mode will later be set
                 * from BSS config in iwl_ht_conf */
                ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;

                /* if we are switching from ht to 2.4 clear flags
                 * from any ht related info since 2.4 does not
                 * support ht */
                if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
                        priv->staging_rxon.flags = 0;

                iwl_set_rxon_channel(priv, conf->channel);

                iwl_set_flags_for_band(priv, conf->channel->band);
                spin_unlock_irqrestore(&priv->lock, flags);
 set_ch_out:
                /* The list of supported rates and rate mask can be different
                 * for each band; since the band may have changed, reset
                 * the rate mask to what mac80211 lists */
                iwl_set_rate(priv);
        }

        if (changed & (IEEE80211_CONF_CHANGE_PS |
                        IEEE80211_CONF_CHANGE_IDLE)) {
                ret = iwl_power_update_mode(priv, false);
                if (ret)
                        IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
        }

        if (changed & IEEE80211_CONF_CHANGE_POWER) {
                IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
                        priv->tx_power_user_lmt, conf->power_level);

                iwl_set_tx_power(priv, conf->power_level, false);
        }

        /* call to ensure that 4965 rx_chain is set properly in monitor mode */
        if (priv->cfg->ops->hcmd->set_rxon_chain)
                priv->cfg->ops->hcmd->set_rxon_chain(priv);

        if (!iwl_is_ready(priv)) {
                IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
                goto out;
        }

        if (scan_active)
                goto out;

        if (memcmp(&priv->active_rxon,
                   &priv->staging_rxon, sizeof(priv->staging_rxon)))
                iwlcore_commit_rxon(priv);
        else
                IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");


out:
        IWL_DEBUG_MAC80211(priv, "leave\n");
        mutex_unlock(&priv->mutex);
        return ret;
}
EXPORT_SYMBOL(iwl_mac_config);

int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
                         struct ieee80211_tx_queue_stats *stats)
{
        struct iwl_priv *priv = hw->priv;
        int i, avail;
        struct iwl_tx_queue *txq;
        struct iwl_queue *q;
        unsigned long flags;

        IWL_DEBUG_MAC80211(priv, "enter\n");

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
                return -EIO;
        }

        spin_lock_irqsave(&priv->lock, flags);

        for (i = 0; i < AC_NUM; i++) {
                txq = &priv->txq[i];
                q = &txq->q;
                avail = iwl_queue_space(q);

                stats[i].len = q->n_window - avail;
                stats[i].limit = q->n_window - q->high_mark;
                stats[i].count = q->n_window;

        }
        spin_unlock_irqrestore(&priv->lock, flags);

        IWL_DEBUG_MAC80211(priv, "leave\n");

        return 0;
}
EXPORT_SYMBOL(iwl_mac_get_tx_stats);

void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;

        mutex_lock(&priv->mutex);
        IWL_DEBUG_MAC80211(priv, "enter\n");

        spin_lock_irqsave(&priv->lock, flags);
        memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_reset_qos(priv);

        spin_lock_irqsave(&priv->lock, flags);
        priv->assoc_id = 0;
        priv->assoc_capability = 0;
        priv->assoc_station_added = 0;

        /* new association get rid of ibss beacon skb */
        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);

        priv->ibss_beacon = NULL;

        priv->beacon_int = priv->vif->bss_conf.beacon_int;
        priv->timestamp = 0;
        if ((priv->iw_mode == NL80211_IFTYPE_STATION))
                priv->beacon_int = 0;

        spin_unlock_irqrestore(&priv->lock, flags);

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
                mutex_unlock(&priv->mutex);
                return;
        }

        /* we are restarting association process
         * clear RXON_FILTER_ASSOC_MSK bit
         */
        if (priv->iw_mode != NL80211_IFTYPE_AP) {
                iwl_scan_cancel_timeout(priv, 100);
                priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
                iwlcore_commit_rxon(priv);
        }

        if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
                IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
                mutex_unlock(&priv->mutex);
                return;
        }

        iwl_set_rate(priv);

        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_mac_reset_tsf);

int iwl_alloc_txq_mem(struct iwl_priv *priv)
{
        if (!priv->txq)
                priv->txq = kzalloc(
                        sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
                        GFP_KERNEL);
        if (!priv->txq) {
                IWL_ERR(priv, "Not enough memory for txq \n");
                return -ENOMEM;
        }
        return 0;
}
EXPORT_SYMBOL(iwl_alloc_txq_mem);

void iwl_free_txq_mem(struct iwl_priv *priv)
{
        kfree(priv->txq);
        priv->txq = NULL;
}
EXPORT_SYMBOL(iwl_free_txq_mem);

int iwl_send_wimax_coex(struct iwl_priv *priv)
{
        struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);

        if (priv->cfg->support_wimax_coexist) {
                /* UnMask wake up src at associated sleep */
                coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;

                /* UnMask wake up src at unassociated sleep */
                coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
                memcpy(coex_cmd.sta_prio, cu_priorities,
                        sizeof(struct iwl_wimax_coex_event_entry) *
                         COEX_NUM_OF_EVENTS);

                /* enabling the coexistence feature */
                coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;

                /* enabling the priorities tables */
                coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
        } else {
                /* coexistence is disabled */
                memset(&coex_cmd, 0, sizeof(coex_cmd));
        }
        return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
                                sizeof(coex_cmd), &coex_cmd);
}
EXPORT_SYMBOL(iwl_send_wimax_coex);

#ifdef CONFIG_IWLWIFI_DEBUGFS

#define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)

void iwl_reset_traffic_log(struct iwl_priv *priv)
{
        priv->tx_traffic_idx = 0;
        priv->rx_traffic_idx = 0;
        if (priv->tx_traffic)
                memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
        if (priv->rx_traffic)
                memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
}

int iwl_alloc_traffic_mem(struct iwl_priv *priv)
{
        u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;

        if (iwl_debug_level & IWL_DL_TX) {
                if (!priv->tx_traffic) {
                        priv->tx_traffic =
                                kzalloc(traffic_size, GFP_KERNEL);
                        if (!priv->tx_traffic)
                                return -ENOMEM;
                }
        }
        if (iwl_debug_level & IWL_DL_RX) {
                if (!priv->rx_traffic) {
                        priv->rx_traffic =
                                kzalloc(traffic_size, GFP_KERNEL);
                        if (!priv->rx_traffic)
                                return -ENOMEM;
                }
        }
        iwl_reset_traffic_log(priv);
        return 0;
}
EXPORT_SYMBOL(iwl_alloc_traffic_mem);

void iwl_free_traffic_mem(struct iwl_priv *priv)
{
        kfree(priv->tx_traffic);
        priv->tx_traffic = NULL;

        kfree(priv->rx_traffic);
        priv->rx_traffic = NULL;
}
EXPORT_SYMBOL(iwl_free_traffic_mem);

void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
                      u16 length, struct ieee80211_hdr *header)
{
        __le16 fc;
        u16 len;

        if (likely(!(iwl_debug_level & IWL_DL_TX)))
                return;

        if (!priv->tx_traffic)
                return;

        fc = header->frame_control;
        if (ieee80211_is_data(fc)) {
                len = (length > IWL_TRAFFIC_ENTRY_SIZE)
                       ? IWL_TRAFFIC_ENTRY_SIZE : length;
                memcpy((priv->tx_traffic +
                       (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
                       header, len);
                priv->tx_traffic_idx =
                        (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
        }
}
EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);

void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
                      u16 length, struct ieee80211_hdr *header)
{
        __le16 fc;
        u16 len;

        if (likely(!(iwl_debug_level & IWL_DL_RX)))
                return;

        if (!priv->rx_traffic)
                return;

        fc = header->frame_control;
        if (ieee80211_is_data(fc)) {
                len = (length > IWL_TRAFFIC_ENTRY_SIZE)
                       ? IWL_TRAFFIC_ENTRY_SIZE : length;
                memcpy((priv->rx_traffic +
                       (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
                       header, len);
                priv->rx_traffic_idx =
                        (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
        }
}
EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);

const char *get_mgmt_string(int cmd)
{
        switch (cmd) {
                IWL_CMD(MANAGEMENT_ASSOC_REQ);
                IWL_CMD(MANAGEMENT_ASSOC_RESP);
                IWL_CMD(MANAGEMENT_REASSOC_REQ);
                IWL_CMD(MANAGEMENT_REASSOC_RESP);
                IWL_CMD(MANAGEMENT_PROBE_REQ);
                IWL_CMD(MANAGEMENT_PROBE_RESP);
                IWL_CMD(MANAGEMENT_BEACON);
                IWL_CMD(MANAGEMENT_ATIM);
                IWL_CMD(MANAGEMENT_DISASSOC);
                IWL_CMD(MANAGEMENT_AUTH);
                IWL_CMD(MANAGEMENT_DEAUTH);
                IWL_CMD(MANAGEMENT_ACTION);
        default:
                return "UNKNOWN";

        }
}

const char *get_ctrl_string(int cmd)
{
        switch (cmd) {
                IWL_CMD(CONTROL_BACK_REQ);
                IWL_CMD(CONTROL_BACK);
                IWL_CMD(CONTROL_PSPOLL);
                IWL_CMD(CONTROL_RTS);
                IWL_CMD(CONTROL_CTS);
                IWL_CMD(CONTROL_ACK);
                IWL_CMD(CONTROL_CFEND);
                IWL_CMD(CONTROL_CFENDACK);
        default:
                return "UNKNOWN";

        }
}

void iwl_clear_tx_stats(struct iwl_priv *priv)
{
        memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));

}

void iwl_clear_rx_stats(struct iwl_priv *priv)
{
        memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
}

/*
 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
 * Use debugFs to display the rx/rx_statistics
 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
 * information will be recorded, but DATA pkt still will be recorded
 * for the reason of iwl_led.c need to control the led blinking based on
 * number of tx and rx data.
 *
 */
void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
{
        struct traffic_stats    *stats;

        if (is_tx)
                stats = &priv->tx_stats;
        else
                stats = &priv->rx_stats;

        if (ieee80211_is_mgmt(fc)) {
                switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
                case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
                        stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
                        stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
                        stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
                        stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
                        stats->mgmt[MANAGEMENT_PROBE_REQ]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
                        stats->mgmt[MANAGEMENT_PROBE_RESP]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_BEACON):
                        stats->mgmt[MANAGEMENT_BEACON]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_ATIM):
                        stats->mgmt[MANAGEMENT_ATIM]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
                        stats->mgmt[MANAGEMENT_DISASSOC]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_AUTH):
                        stats->mgmt[MANAGEMENT_AUTH]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
                        stats->mgmt[MANAGEMENT_DEAUTH]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_ACTION):
                        stats->mgmt[MANAGEMENT_ACTION]++;
                        break;
                }
        } else if (ieee80211_is_ctl(fc)) {
                switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
                case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
                        stats->ctrl[CONTROL_BACK_REQ]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_BACK):
                        stats->ctrl[CONTROL_BACK]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
                        stats->ctrl[CONTROL_PSPOLL]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_RTS):
                        stats->ctrl[CONTROL_RTS]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_CTS):
                        stats->ctrl[CONTROL_CTS]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_ACK):
                        stats->ctrl[CONTROL_ACK]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_CFEND):
                        stats->ctrl[CONTROL_CFEND]++;
                        break;
                case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
                        stats->ctrl[CONTROL_CFENDACK]++;
                        break;
                }
        } else {
                /* data */
                stats->data_cnt++;
                stats->data_bytes += len;
        }
}
EXPORT_SYMBOL(iwl_update_stats);
#endif

#ifdef CONFIG_PM

int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
        struct iwl_priv *priv = pci_get_drvdata(pdev);

        /*
         * This function is called when system goes into suspend state
         * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
         * first but since iwl_mac_stop() has no knowledge of who the caller is,
         * it will not call apm_ops.stop() to stop the DMA operation.
         * Calling apm_ops.stop here to make sure we stop the DMA.
         */
        priv->cfg->ops->lib->apm_ops.stop(priv);

        pci_save_state(pdev);
        pci_disable_device(pdev);
        pci_set_power_state(pdev, PCI_D3hot);

        return 0;
}
EXPORT_SYMBOL(iwl_pci_suspend);

int iwl_pci_resume(struct pci_dev *pdev)
{
        struct iwl_priv *priv = pci_get_drvdata(pdev);
        int ret;

        pci_set_power_state(pdev, PCI_D0);
        ret = pci_enable_device(pdev);
        if (ret)
                return ret;
        pci_restore_state(pdev);
        iwl_enable_interrupts(priv);

        return 0;
}
EXPORT_SYMBOL(iwl_pci_resume);

#endif /* CONFIG_PM */