1 files changed, 859 insertions, 57 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 79773e353baa..b774517aa9fa 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
  *
  * Portions of this file are derived from the ipw3945 project, as well
  * as portions of the ieee80211 subsystem header files.
@@ -29,6 +29,7 @@
 
 #include <linux/etherdevice.h>
 #include <linux/slab.h>
+#include <linux/sched.h>
 #include <net/mac80211.h>
 #include <asm/unaligned.h>
 #include "iwl-eeprom.h"
@@ -36,9 +37,16 @@
 #include "iwl-core.h"
 #include "iwl-sta.h"
 #include "iwl-io.h"
-#include "iwl-calib.h"
 #include "iwl-helpers.h"
-/************************** RX-FUNCTIONS ****************************/
+#include "iwl-agn-calib.h"
+#include "iwl-agn.h"
+
+/******************************************************************************
+ *
+ * RX path functions
+ *
+ ******************************************************************************/
+
 /*
  * Rx theory of operation
  *
@@ -119,7 +127,6 @@ int iwl_rx_queue_space(const struct iwl_rx_queue *q)
                 s = 0;
         return s;
 }
-EXPORT_SYMBOL(iwl_rx_queue_space);
 
 /**
  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
@@ -135,34 +142,42 @@ void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q
         if (q->need_update == 0)
                 goto exit_unlock;
 
-        /* If power-saving is in use, make sure device is awake */
-        if (test_bit(STATUS_POWER_PMI, &priv->status)) {
-                reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
+        if (priv->cfg->base_params->shadow_reg_enable) {
+                /* shadow register enabled */
+                /* Device expects a multiple of 8 */
+                q->write_actual = (q->write & ~0x7);
+                iwl_write32(priv, rx_wrt_ptr_reg, q->write_actual);
+        } else {
+                /* If power-saving is in use, make sure device is awake */
+                if (test_bit(STATUS_POWER_PMI, &priv->status)) {
+                        reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
 
-                if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
-                        IWL_DEBUG_INFO(priv, "Rx queue requesting wakeup, GP1 = 0x%x\n",
-                                      reg);
-                        iwl_set_bit(priv, CSR_GP_CNTRL,
-                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
-                        goto exit_unlock;
-                }
+                        if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
+                                IWL_DEBUG_INFO(priv,
+                                        "Rx queue requesting wakeup,"
+                                        " GP1 = 0x%x\n", reg);
+                                iwl_set_bit(priv, CSR_GP_CNTRL,
+                                        CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+                                goto exit_unlock;
+                        }
 
-                q->write_actual = (q->write & ~0x7);
-                iwl_write_direct32(priv, rx_wrt_ptr_reg, q->write_actual);
+                        q->write_actual = (q->write & ~0x7);
+                        iwl_write_direct32(priv, rx_wrt_ptr_reg,
+                                        q->write_actual);
 
-        /* Else device is assumed to be awake */
-        } else {
-                /* Device expects a multiple of 8 */
-                q->write_actual = (q->write & ~0x7);
-                iwl_write_direct32(priv, rx_wrt_ptr_reg, q->write_actual);
+                /* Else device is assumed to be awake */
+                } else {
+                        /* Device expects a multiple of 8 */
+                        q->write_actual = (q->write & ~0x7);
+                        iwl_write_direct32(priv, rx_wrt_ptr_reg,
+                                q->write_actual);
+                }
         }
-
         q->need_update = 0;
 
  exit_unlock:
         spin_unlock_irqrestore(&q->lock, flags);
 }
-EXPORT_SYMBOL(iwl_rx_queue_update_write_ptr);
 
 int iwl_rx_queue_alloc(struct iwl_priv *priv)
 {
@@ -203,10 +218,56 @@ err_rb:
 err_bd:
         return -ENOMEM;
 }
-EXPORT_SYMBOL(iwl_rx_queue_alloc);
+
+/******************************************************************************
+ *
+ * Generic RX handler implementations
+ *
+ ******************************************************************************/
+
+static 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));
+}
+
+static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
+        /*
+         * MULTI-FIXME
+         * See iwl_mac_channel_switch.
+         */
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
+
+        if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
+                return;
+
+        if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
+                rxon->channel = csa->channel;
+                ctx->staging.channel = csa->channel;
+                IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
+                              le16_to_cpu(csa->channel));
+                iwl_chswitch_done(priv, true);
+        } else {
+                IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
+                        le16_to_cpu(csa->channel));
+                iwl_chswitch_done(priv, false);
+        }
+}
 
 
-void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
+static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
                                           struct iwl_rx_mem_buffer *rxb)
 {
         struct iwl_rx_packet *pkt = rxb_addr(rxb);
@@ -221,52 +282,514 @@ void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
         memcpy(&priv->measure_report, report, sizeof(*report));
         priv->measurement_status |= MEASUREMENT_READY;
 }
-EXPORT_SYMBOL(iwl_rx_spectrum_measure_notif);
 
-void iwl_recover_from_statistics(struct iwl_priv *priv,
-                                struct iwl_rx_packet *pkt)
+static 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
+}
+
+static 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);
+}
+
+static void iwl_rx_beacon_notif(struct iwl_priv *priv,
+                                struct iwl_rx_mem_buffer *rxb)
 {
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
+#ifdef CONFIG_IWLWIFI_DEBUG
+        u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
+        u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
+
+        IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
+                "tsf:0x%.8x%.8x rate:%d\n",
+                status & TX_STATUS_MSK,
+                beacon->beacon_notify_hdr.failure_frame,
+                le32_to_cpu(beacon->ibss_mgr_status),
+                le32_to_cpu(beacon->high_tsf),
+                le32_to_cpu(beacon->low_tsf), rate);
+#endif
+
+        priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
+
+        if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
+                queue_work(priv->workqueue, &priv->beacon_update);
+}
+
+/* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
+#define ACK_CNT_RATIO (50)
+#define BA_TIMEOUT_CNT (5)
+#define BA_TIMEOUT_MAX (16)
+
+/**
+ * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
+ *
+ * When the ACK count ratio is low and aggregated BA timeout retries exceeding
+ * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
+ * operation state.
+ */
+static bool iwl_good_ack_health(struct iwl_priv *priv,
+                                struct statistics_tx *cur)
+{
+        int actual_delta, expected_delta, ba_timeout_delta;
+        struct statistics_tx *old;
+
+        if (priv->_agn.agg_tids_count)
+                return true;
+
+        old = &priv->statistics.tx;
+
+        actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
+                       le32_to_cpu(old->actual_ack_cnt);
+        expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
+                         le32_to_cpu(old->expected_ack_cnt);
+
+        /* Values should not be negative, but we do not trust the firmware */
+        if (actual_delta <= 0 || expected_delta <= 0)
+                return true;
+
+        ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
+                           le32_to_cpu(old->agg.ba_timeout);
+
+        if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
+            ba_timeout_delta > BA_TIMEOUT_CNT) {
+                IWL_DEBUG_RADIO(priv, "deltas: actual %d expected %d ba_timeout %d\n",
+                                actual_delta, expected_delta, ba_timeout_delta);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+                /*
+                 * This is ifdef'ed on DEBUGFS because otherwise the
+                 * statistics aren't available. If DEBUGFS is set but
+                 * DEBUG is not, these will just compile out.
+                 */
+                IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
+                                priv->delta_stats.tx.rx_detected_cnt);
+                IWL_DEBUG_RADIO(priv,
+                                "ack_or_ba_timeout_collision delta %d\n",
+                                priv->delta_stats.tx.ack_or_ba_timeout_collision);
+#endif
+
+                if (ba_timeout_delta >= BA_TIMEOUT_MAX)
+                        return false;
+        }
+
+        return true;
+}
+
+/**
+ * iwl_good_plcp_health - checks for plcp error.
+ *
+ * When the plcp error is exceeding the thresholds, reset the radio
+ * to improve the throughput.
+ */
+static bool iwl_good_plcp_health(struct iwl_priv *priv,
+                                 struct statistics_rx_phy *cur_ofdm,
+                                 struct statistics_rx_ht_phy *cur_ofdm_ht,
+                                 unsigned int msecs)
+{
+        int delta;
+        int threshold = priv->cfg->base_params->plcp_delta_threshold;
+
+        if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
+                IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
+                return true;
+        }
+
+        delta = le32_to_cpu(cur_ofdm->plcp_err) -
+                le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
+                le32_to_cpu(cur_ofdm_ht->plcp_err) -
+                le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
+
+        /* Can be negative if firmware reset statistics */
+        if (delta <= 0)
+                return true;
+
+        if ((delta * 100 / msecs) > threshold) {
+                IWL_DEBUG_RADIO(priv,
+                                "plcp health threshold %u delta %d msecs %u\n",
+                                threshold, delta, msecs);
+                return false;
+        }
+
+        return true;
+}
+
+static void iwl_recover_from_statistics(struct iwl_priv *priv,
+                                        struct statistics_rx_phy *cur_ofdm,
+                                        struct statistics_rx_ht_phy *cur_ofdm_ht,
+                                        struct statistics_tx *tx,
+                                        unsigned long stamp)
+{
+        unsigned int msecs;
+
         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                 return;
-        if (iwl_is_associated(priv)) {
-                if (priv->cfg->ops->lib->check_ack_health) {
-                        if (!priv->cfg->ops->lib->check_ack_health(
-                            priv, pkt)) {
-                                /*
-                                 * low ack count detected
-                                 * restart Firmware
-                                 */
-                                IWL_ERR(priv, "low ack count detected, "
-                                        "restart firmware\n");
-                                if (!iwl_force_reset(priv, IWL_FW_RESET, false))
-                                        return;
-                        }
+
+        msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
+
+        /* Only gather statistics and update time stamp when not associated */
+        if (!iwl_is_any_associated(priv))
+                return;
+
+        /* Do not check/recover when do not have enough statistics data */
+        if (msecs < 99)
+                return;
+
+        if (iwlagn_mod_params.ack_check && !iwl_good_ack_health(priv, tx)) {
+                IWL_ERR(priv, "low ack count detected, restart firmware\n");
+                if (!iwl_force_reset(priv, IWL_FW_RESET, false))
+                        return;
+        }
+
+        if (iwlagn_mod_params.plcp_check &&
+            !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
+                iwl_force_reset(priv, IWL_RF_RESET, false);
+}
+
+/* Calculate noise level, based on measurements during network silence just
+ *   before arriving beacon.  This measurement can be done only if we know
+ *   exactly when to expect beacons, therefore only when we're associated. */
+static void iwl_rx_calc_noise(struct iwl_priv *priv)
+{
+        struct statistics_rx_non_phy *rx_info;
+        int num_active_rx = 0;
+        int total_silence = 0;
+        int bcn_silence_a, bcn_silence_b, bcn_silence_c;
+        int last_rx_noise;
+
+        rx_info = &priv->statistics.rx_non_phy;
+
+        bcn_silence_a =
+                le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
+        bcn_silence_b =
+                le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
+        bcn_silence_c =
+                le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
+
+        if (bcn_silence_a) {
+                total_silence += bcn_silence_a;
+                num_active_rx++;
+        }
+        if (bcn_silence_b) {
+                total_silence += bcn_silence_b;
+                num_active_rx++;
+        }
+        if (bcn_silence_c) {
+                total_silence += bcn_silence_c;
+                num_active_rx++;
+        }
+
+        /* Average among active antennas */
+        if (num_active_rx)
+                last_rx_noise = (total_silence / num_active_rx) - 107;
+        else
+                last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
+
+        IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
+                        bcn_silence_a, bcn_silence_b, bcn_silence_c,
+                        last_rx_noise);
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+/*
+ *  based on the assumption of all statistics counter are in DWORD
+ *  FIXME: This function is for debugging, do not deal with
+ *  the case of counters roll-over.
+ */
+static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
+                        __le32 *max_delta, __le32 *accum, int size)
+{
+        int i;
+
+        for (i = 0;
+             i < size / sizeof(__le32);
+             i++, prev++, cur++, delta++, max_delta++, accum++) {
+                if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
+                        *delta = cpu_to_le32(
+                                le32_to_cpu(*cur) - le32_to_cpu(*prev));
+                        le32_add_cpu(accum, le32_to_cpu(*delta));
+                        if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
+                                *max_delta = *delta;
                 }
-                if (priv->cfg->ops->lib->check_plcp_health) {
-                        if (!priv->cfg->ops->lib->check_plcp_health(
-                            priv, pkt)) {
-                                /*
-                                 * high plcp error detected
-                                 * reset Radio
-                                 */
-                                iwl_force_reset(priv, IWL_RF_RESET, false);
-                        }
+        }
+}
+
+static void
+iwl_accumulative_statistics(struct iwl_priv *priv,
+                            struct statistics_general_common *common,
+                            struct statistics_rx_non_phy *rx_non_phy,
+                            struct statistics_rx_phy *rx_ofdm,
+                            struct statistics_rx_ht_phy *rx_ofdm_ht,
+                            struct statistics_rx_phy *rx_cck,
+                            struct statistics_tx *tx,
+                            struct statistics_bt_activity *bt_activity)
+{
+#define ACCUM(_name)    \
+        accum_stats((__le32 *)&priv->statistics._name,          \
+                    (__le32 *)_name,                            \
+                    (__le32 *)&priv->delta_stats._name,         \
+                    (__le32 *)&priv->max_delta_stats._name,     \
+                    (__le32 *)&priv->accum_stats._name,         \
+                    sizeof(*_name));
+
+        ACCUM(common);
+        ACCUM(rx_non_phy);
+        ACCUM(rx_ofdm);
+        ACCUM(rx_ofdm_ht);
+        ACCUM(rx_cck);
+        ACCUM(tx);
+        if (bt_activity)
+                ACCUM(bt_activity);
+#undef ACCUM
+}
+#else
+static inline void
+iwl_accumulative_statistics(struct iwl_priv *priv,
+                            struct statistics_general_common *common,
+                            struct statistics_rx_non_phy *rx_non_phy,
+                            struct statistics_rx_phy *rx_ofdm,
+                            struct statistics_rx_ht_phy *rx_ofdm_ht,
+                            struct statistics_rx_phy *rx_cck,
+                            struct statistics_tx *tx,
+                            struct statistics_bt_activity *bt_activity)
+{
+}
+#endif
+
+static void iwl_rx_statistics(struct iwl_priv *priv,
+                              struct iwl_rx_mem_buffer *rxb)
+{
+        unsigned long stamp = jiffies;
+        const int reg_recalib_period = 60;
+        int change;
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
+        __le32 *flag;
+        struct statistics_general_common *common;
+        struct statistics_rx_non_phy *rx_non_phy;
+        struct statistics_rx_phy *rx_ofdm;
+        struct statistics_rx_ht_phy *rx_ofdm_ht;
+        struct statistics_rx_phy *rx_cck;
+        struct statistics_tx *tx;
+        struct statistics_bt_activity *bt_activity;
+
+        len -= sizeof(struct iwl_cmd_header); /* skip header */
+
+        IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
+                     len);
+
+        if (len == sizeof(struct iwl_bt_notif_statistics)) {
+                struct iwl_bt_notif_statistics *stats;
+                stats = &pkt->u.stats_bt;
+                flag = &stats->flag;
+                common = &stats->general.common;
+                rx_non_phy = &stats->rx.general.common;
+                rx_ofdm = &stats->rx.ofdm;
+                rx_ofdm_ht = &stats->rx.ofdm_ht;
+                rx_cck = &stats->rx.cck;
+                tx = &stats->tx;
+                bt_activity = &stats->general.activity;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+                /* handle this exception directly */
+                priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
+                le32_add_cpu(&priv->statistics.accum_num_bt_kills,
+                             le32_to_cpu(stats->rx.general.num_bt_kills));
+#endif
+        } else if (len == sizeof(struct iwl_notif_statistics)) {
+                struct iwl_notif_statistics *stats;
+                stats = &pkt->u.stats;
+                flag = &stats->flag;
+                common = &stats->general.common;
+                rx_non_phy = &stats->rx.general;
+                rx_ofdm = &stats->rx.ofdm;
+                rx_ofdm_ht = &stats->rx.ofdm_ht;
+                rx_cck = &stats->rx.cck;
+                tx = &stats->tx;
+                bt_activity = NULL;
+        } else {
+                WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
+                          len, sizeof(struct iwl_bt_notif_statistics),
+                          sizeof(struct iwl_notif_statistics));
+                return;
+        }
+
+        change = common->temperature != priv->statistics.common.temperature ||
+                 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
+                 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
+
+        iwl_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
+                                    rx_ofdm_ht, rx_cck, tx, bt_activity);
+
+        iwl_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
+
+        priv->statistics.flag = *flag;
+        memcpy(&priv->statistics.common, common, sizeof(*common));
+        memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
+        memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
+        memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
+        memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
+        memcpy(&priv->statistics.tx, tx, sizeof(*tx));
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+        if (bt_activity)
+                memcpy(&priv->statistics.bt_activity, bt_activity,
+                        sizeof(*bt_activity));
+#endif
+
+        priv->rx_statistics_jiffies = stamp;
+
+        set_bit(STATUS_STATISTICS, &priv->status);
+
+        /* Reschedule the statistics timer to occur in
+         * reg_recalib_period seconds to ensure we get a
+         * thermal update even if the uCode doesn't give
+         * us one */
+        mod_timer(&priv->statistics_periodic, jiffies +
+                  msecs_to_jiffies(reg_recalib_period * 1000));
+
+        if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
+            (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
+                iwl_rx_calc_noise(priv);
+                queue_work(priv->workqueue, &priv->run_time_calib_work);
+        }
+        if (priv->cfg->ops->lib->temp_ops.temperature && change)
+                priv->cfg->ops->lib->temp_ops.temperature(priv);
+}
+
+static void iwl_rx_reply_statistics(struct iwl_priv *priv,
+                                    struct iwl_rx_mem_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+
+        if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+                memset(&priv->accum_stats, 0,
+                        sizeof(priv->accum_stats));
+                memset(&priv->delta_stats, 0,
+                        sizeof(priv->delta_stats));
+                memset(&priv->max_delta_stats, 0,
+                        sizeof(priv->max_delta_stats));
+#endif
+                IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
+        }
+        iwl_rx_statistics(priv, rxb);
+}
+
+/* Handle notification from uCode that card's power state is changing
+ * due to software, hardware, or critical temperature RFKILL */
+static void iwl_rx_card_state_notif(struct iwl_priv *priv,
+                                    struct iwl_rx_mem_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
+        unsigned long status = priv->status;
+
+        IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
+                          (flags & HW_CARD_DISABLED) ? "Kill" : "On",
+                          (flags & SW_CARD_DISABLED) ? "Kill" : "On",
+                          (flags & CT_CARD_DISABLED) ?
+                          "Reached" : "Not reached");
+
+        if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
+                     CT_CARD_DISABLED)) {
+
+                iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
+                            CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
+
+                iwl_write_direct32(priv, HBUS_TARG_MBX_C,
+                                        HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
+
+                if (!(flags & RXON_CARD_DISABLED)) {
+                        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
+                                    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
+                        iwl_write_direct32(priv, HBUS_TARG_MBX_C,
+                                        HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
                 }
+                if (flags & CT_CARD_DISABLED)
+                        iwl_tt_enter_ct_kill(priv);
         }
+        if (!(flags & CT_CARD_DISABLED))
+                iwl_tt_exit_ct_kill(priv);
+
+        if (flags & HW_CARD_DISABLED)
+                set_bit(STATUS_RF_KILL_HW, &priv->status);
+        else
+                clear_bit(STATUS_RF_KILL_HW, &priv->status);
+
+
+        if (!(flags & RXON_CARD_DISABLED))
+                iwl_scan_cancel(priv);
+
+        if ((test_bit(STATUS_RF_KILL_HW, &status) !=
+             test_bit(STATUS_RF_KILL_HW, &priv->status)))
+                wiphy_rfkill_set_hw_state(priv->hw->wiphy,
+                        test_bit(STATUS_RF_KILL_HW, &priv->status));
+        else
+                wake_up_interruptible(&priv->wait_command_queue);
+}
+
+static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
+                                       struct iwl_rx_mem_buffer *rxb)
+
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwl_missed_beacon_notif *missed_beacon;
+
+        missed_beacon = &pkt->u.missed_beacon;
+        if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
+            priv->missed_beacon_threshold) {
+                IWL_DEBUG_CALIB(priv,
+                    "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
+                    le32_to_cpu(missed_beacon->consecutive_missed_beacons),
+                    le32_to_cpu(missed_beacon->total_missed_becons),
+                    le32_to_cpu(missed_beacon->num_recvd_beacons),
+                    le32_to_cpu(missed_beacon->num_expected_beacons));
+                if (!test_bit(STATUS_SCANNING, &priv->status))
+                        iwl_init_sensitivity(priv);
+        }
+}
+
+/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
+ * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
+static void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
+                                struct iwl_rx_mem_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+
+        priv->_agn.last_phy_res_valid = true;
+        memcpy(&priv->_agn.last_phy_res, pkt->u.raw,
+               sizeof(struct iwl_rx_phy_res));
 }
-EXPORT_SYMBOL(iwl_recover_from_statistics);
 
 /*
  * returns non-zero if packet should be dropped
  */
-int iwl_set_decrypted_flag(struct iwl_priv *priv,
-                           struct ieee80211_hdr *hdr,
-                           u32 decrypt_res,
-                           struct ieee80211_rx_status *stats)
+static int iwl_set_decrypted_flag(struct iwl_priv *priv,
+                                  struct ieee80211_hdr *hdr,
+                                  u32 decrypt_res,
+                                  struct ieee80211_rx_status *stats)
 {
         u16 fc = le16_to_cpu(hdr->frame_control);
 
-        if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
+        /*
+         * All contexts have the same setting here due to it being
+         * a module parameter, so OK to check any context.
+         */
+        if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
+                                                RXON_FILTER_DIS_DECRYPT_MSK)
                 return 0;
 
         if (!(fc & IEEE80211_FCTL_PROTECTED))
@@ -302,4 +825,283 @@ int iwl_set_decrypted_flag(struct iwl_priv *priv,
         }
         return 0;
 }
-EXPORT_SYMBOL(iwl_set_decrypted_flag);
+
+static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
+                                        struct ieee80211_hdr *hdr,
+                                        u16 len,
+                                        u32 ampdu_status,
+                                        struct iwl_rx_mem_buffer *rxb,
+                                        struct ieee80211_rx_status *stats)
+{
+        struct sk_buff *skb;
+        __le16 fc = hdr->frame_control;
+        struct iwl_rxon_context *ctx;
+
+        /* We only process data packets if the interface is open */
+        if (unlikely(!priv->is_open)) {
+                IWL_DEBUG_DROP_LIMIT(priv,
+                    "Dropping packet while interface is not open.\n");
+                return;
+        }
+
+        /* In case of HW accelerated crypto and bad decryption, drop */
+        if (!iwlagn_mod_params.sw_crypto &&
+            iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
+                return;
+
+        skb = dev_alloc_skb(128);
+        if (!skb) {
+                IWL_ERR(priv, "dev_alloc_skb failed\n");
+                return;
+        }
+
+        skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
+
+        iwl_update_stats(priv, false, fc, len);
+
+        /*
+        * Wake any queues that were stopped due to a passive channel tx
+        * failure. This can happen because the regulatory enforcement in
+        * the device waits for a beacon before allowing transmission,
+        * sometimes even after already having transmitted frames for the
+        * association because the new RXON may reset the information.
+        */
+        if (unlikely(ieee80211_is_beacon(fc))) {
+                for_each_context(priv, ctx) {
+                        if (!ctx->last_tx_rejected)
+                                continue;
+                        if (compare_ether_addr(hdr->addr3,
+                                               ctx->active.bssid_addr))
+                                continue;
+                        ctx->last_tx_rejected = false;
+                        iwl_wake_any_queue(priv, ctx);
+                }
+        }
+
+        memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
+
+        ieee80211_rx(priv->hw, skb);
+        rxb->page = NULL;
+}
+
+static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
+{
+        u32 decrypt_out = 0;
+
+        if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
+                                        RX_RES_STATUS_STATION_FOUND)
+                decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
+                                RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
+
+        decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
+
+        /* packet was not encrypted */
+        if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
+                                        RX_RES_STATUS_SEC_TYPE_NONE)
+                return decrypt_out;
+
+        /* packet was encrypted with unknown alg */
+        if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
+                                        RX_RES_STATUS_SEC_TYPE_ERR)
+                return decrypt_out;
+
+        /* decryption was not done in HW */
+        if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
+                                        RX_MPDU_RES_STATUS_DEC_DONE_MSK)
+                return decrypt_out;
+
+        switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
+
+        case RX_RES_STATUS_SEC_TYPE_CCMP:
+                /* alg is CCM: check MIC only */
+                if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
+                        /* Bad MIC */
+                        decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
+                else
+                        decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
+
+                break;
+
+        case RX_RES_STATUS_SEC_TYPE_TKIP:
+                if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
+                        /* Bad TTAK */
+                        decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
+                        break;
+                }
+                /* fall through if TTAK OK */
+        default:
+                if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
+                        decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
+                else
+                        decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
+                break;
+        }
+
+        IWL_DEBUG_RX(priv, "decrypt_in:0x%x  decrypt_out = 0x%x\n",
+                                        decrypt_in, decrypt_out);
+
+        return decrypt_out;
+}
+
+/* Called for REPLY_RX (legacy ABG frames), or
+ * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
+static void iwl_rx_reply_rx(struct iwl_priv *priv,
+                            struct iwl_rx_mem_buffer *rxb)
+{
+        struct ieee80211_hdr *header;
+        struct ieee80211_rx_status rx_status;
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwl_rx_phy_res *phy_res;
+        __le32 rx_pkt_status;
+        struct iwl_rx_mpdu_res_start *amsdu;
+        u32 len;
+        u32 ampdu_status;
+        u32 rate_n_flags;
+
+        /**
+         * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
+         *      REPLY_RX: physical layer info is in this buffer
+         *      REPLY_RX_MPDU_CMD: physical layer info was sent in separate
+         *              command and cached in priv->last_phy_res
+         *
+         * Here we set up local variables depending on which command is
+         * received.
+         */
+        if (pkt->hdr.cmd == REPLY_RX) {
+                phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
+                header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
+                                + phy_res->cfg_phy_cnt);
+
+                len = le16_to_cpu(phy_res->byte_count);
+                rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
+                                phy_res->cfg_phy_cnt + len);
+                ampdu_status = le32_to_cpu(rx_pkt_status);
+        } else {
+                if (!priv->_agn.last_phy_res_valid) {
+                        IWL_ERR(priv, "MPDU frame without cached PHY data\n");
+                        return;
+                }
+                phy_res = &priv->_agn.last_phy_res;
+                amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
+                header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
+                len = le16_to_cpu(amsdu->byte_count);
+                rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
+                ampdu_status = iwl_translate_rx_status(priv,
+                                                le32_to_cpu(rx_pkt_status));
+        }
+
+        if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
+                IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
+                                phy_res->cfg_phy_cnt);
+                return;
+        }
+
+        if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
+            !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
+                IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
+                                le32_to_cpu(rx_pkt_status));
+                return;
+        }
+
+        /* This will be used in several places later */
+        rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
+
+        /* rx_status carries information about the packet to mac80211 */
+        rx_status.mactime = le64_to_cpu(phy_res->timestamp);
+        rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
+                                IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
+        rx_status.freq =
+                ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
+                                               rx_status.band);
+        rx_status.rate_idx =
+                iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
+        rx_status.flag = 0;
+
+        /* TSF isn't reliable. In order to allow smooth user experience,
+         * this W/A doesn't propagate it to the mac80211 */
+        /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
+
+        priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
+
+        /* Find max signal strength (dBm) among 3 antenna/receiver chains */
+        rx_status.signal = priv->cfg->ops->utils->calc_rssi(priv, phy_res);
+
+        iwl_dbg_log_rx_data_frame(priv, len, header);
+        IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
+                rx_status.signal, (unsigned long long)rx_status.mactime);
+
+        /*
+         * "antenna number"
+         *
+         * It seems that the antenna field in the phy flags value
+         * is actually a bit field. This is undefined by radiotap,
+         * it wants an actual antenna number but I always get "7"
+         * for most legacy frames I receive indicating that the
+         * same frame was received on all three RX chains.
+         *
+         * I think this field should be removed in favor of a
+         * new 802.11n radiotap field "RX chains" that is defined
+         * as a bitmask.
+         */
+        rx_status.antenna =
+                (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
+                >> RX_RES_PHY_FLAGS_ANTENNA_POS;
+
+        /* set the preamble flag if appropriate */
+        if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
+                rx_status.flag |= RX_FLAG_SHORTPRE;
+
+        /* Set up the HT phy flags */
+        if (rate_n_flags & RATE_MCS_HT_MSK)
+                rx_status.flag |= RX_FLAG_HT;
+        if (rate_n_flags & RATE_MCS_HT40_MSK)
+                rx_status.flag |= RX_FLAG_40MHZ;
+        if (rate_n_flags & RATE_MCS_SGI_MSK)
+                rx_status.flag |= RX_FLAG_SHORT_GI;
+
+        iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
+                                    rxb, &rx_status);
+}
+
+/**
+ * iwl_setup_rx_handlers - Initialize Rx handler callbacks
+ *
+ * Setup the RX handlers for each of the reply types sent from the uCode
+ * to the host.
+ */
+void iwl_setup_rx_handlers(struct iwl_priv *priv)
+{
+        void (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
+
+        handlers = priv->rx_handlers;
+
+        handlers[REPLY_ERROR]                   = iwl_rx_reply_error;
+        handlers[CHANNEL_SWITCH_NOTIFICATION]   = iwl_rx_csa;
+        handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif;
+        handlers[PM_SLEEP_NOTIFICATION]         = iwl_rx_pm_sleep_notif;
+        handlers[PM_DEBUG_STATISTIC_NOTIFIC]    = iwl_rx_pm_debug_statistics_notif;
+        handlers[BEACON_NOTIFICATION]           = iwl_rx_beacon_notif;
+
+        /*
+         * The same handler is used for both the REPLY to a discrete
+         * statistics request from the host as well as for the periodic
+         * statistics notifications (after received beacons) from the uCode.
+         */
+        handlers[REPLY_STATISTICS_CMD]          = iwl_rx_reply_statistics;
+        handlers[STATISTICS_NOTIFICATION]       = iwl_rx_statistics;
+
+        iwl_setup_rx_scan_handlers(priv);
+
+        handlers[CARD_STATE_NOTIFICATION]       = iwl_rx_card_state_notif;
+        handlers[MISSED_BEACONS_NOTIFICATION]   = iwl_rx_missed_beacon_notif;
+
+        /* Rx handlers */
+        handlers[REPLY_RX_PHY_CMD]              = iwl_rx_reply_rx_phy;
+        handlers[REPLY_RX_MPDU_CMD]             = iwl_rx_reply_rx;
+
+        /* block ack */
+        handlers[REPLY_COMPRESSED_BA]           = iwlagn_rx_reply_compressed_ba;
+
+        /* Set up hardware specific Rx handlers */
+        priv->cfg->ops->lib->rx_handler_setup(priv);
+}