iwlwifi: move rx handlers code to iwl-rx.c

Put generic rx_handlers (except iwlagn_rx_reply_compressed_ba) to
iwl-rx.c . Make functions static and change prefix from iwlagn_ to
iwl_ . Beautify iwl_setup_rx_handlers and do some other minor coding
style changes.

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

1 files changed, 498 insertions, 25 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 566e2d979ce3..8dc129499b90 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -38,7 +38,14 @@
 #include "iwl-io.h"
 #include "iwl-helpers.h"
 #include "iwl-agn-calib.h"
-/************************** RX-FUNCTIONS ****************************/
+#include "iwl-agn.h"
+
+/******************************************************************************
+ *
+ * RX path functions
+ *
+ ******************************************************************************/
+
 /*
  * Rx theory of operation
  *
@@ -211,7 +218,104 @@ err_bd:
         return -ENOMEM;
 }
 
-void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
+/******************************************************************************
+ *
+ * Generic RX handler implementations
+ *
+ ******************************************************************************/
+
+static void iwl_rx_reply_alive(struct iwl_priv *priv,
+                               struct iwl_rx_mem_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwl_alive_resp *palive;
+        struct delayed_work *pwork;
+
+        palive = &pkt->u.alive_frame;
+
+        IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
+                       "0x%01X 0x%01X\n",
+                       palive->is_valid, palive->ver_type,
+                       palive->ver_subtype);
+
+        if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
+                IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
+                memcpy(&priv->card_alive_init,
+                       &pkt->u.alive_frame,
+                       sizeof(struct iwl_init_alive_resp));
+                pwork = &priv->init_alive_start;
+        } else {
+                IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
+                memcpy(&priv->card_alive, &pkt->u.alive_frame,
+                       sizeof(struct iwl_alive_resp));
+                pwork = &priv->alive_start;
+        }
+
+        /* We delay the ALIVE response by 5ms to
+         * give the HW RF Kill time to activate... */
+        if (palive->is_valid == UCODE_VALID_OK)
+                queue_delayed_work(priv->workqueue, pwork,
+                                   msecs_to_jiffies(5));
+        else {
+                IWL_WARN(priv, "%s uCode did not respond OK.\n",
+                        (palive->ver_subtype == INITIALIZE_SUBTYPE) ?
+                        "init" : "runtime");
+                /*
+                 * If fail to load init uCode,
+                 * let's try to load the init uCode again.
+                 * We should not get into this situation, but if it
+                 * does happen, we should not move on and loading "runtime"
+                 * without proper calibrate the device.
+                 */
+                if (palive->ver_subtype == INITIALIZE_SUBTYPE)
+                        priv->ucode_type = UCODE_NONE;
+                queue_work(priv->workqueue, &priv->restart);
+        }
+}
+
+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 (priv->switch_rxon.switch_in_progress) {
+                if (!le32_to_cpu(csa->status) &&
+                    (csa->channel == priv->switch_rxon.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);
+                }
+        }
+}
+
+
+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);
@@ -227,6 +331,52 @@ void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
         priv->measurement_status |= MEASUREMENT_READY;
 }
 
+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)
@@ -298,7 +448,8 @@ static bool iwl_good_ack_health(struct iwl_priv *priv, struct iwl_rx_packet *pkt
  * 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 iwl_rx_packet *pkt)
+static bool iwl_good_plcp_health(struct iwl_priv *priv,
+                                 struct iwl_rx_packet *pkt)
 {
         bool rc = true;
         int combined_plcp_delta;
@@ -378,7 +529,8 @@ static bool iwl_good_plcp_health(struct iwl_priv *priv, struct iwl_rx_packet *pk
         return rc;
 }
 
-static void iwl_recover_from_statistics(struct iwl_priv *priv, struct iwl_rx_packet *pkt)
+static void iwl_recover_from_statistics(struct iwl_priv *priv,
+                                        struct iwl_rx_packet *pkt)
 {
         const struct iwl_mod_params *mod_params = priv->cfg->mod_params;
 
@@ -442,7 +594,6 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv)
                         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
@@ -451,6 +602,7 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv)
 static void iwl_accumulative_statistics(struct iwl_priv *priv,
                                         __le32 *stats)
 {
+#ifdef CONFIG_IWLWIFI_DEBUGFS
         int i, size;
         __le32 *prev_stats;
         u32 *accum_stats;
@@ -498,14 +650,13 @@ static void iwl_accumulative_statistics(struct iwl_priv *priv,
         accum_tx->tx_power.ant_a = tx->tx_power.ant_a;
         accum_tx->tx_power.ant_b = tx->tx_power.ant_b;
         accum_tx->tx_power.ant_c = tx->tx_power.ant_c;
-}
 #endif
+}
 
-#define REG_RECALIB_PERIOD (60)
-
-void iwl_rx_statistics(struct iwl_priv *priv,
+static void iwl_rx_statistics(struct iwl_priv *priv,
                               struct iwl_rx_mem_buffer *rxb)
 {
+        const int reg_recalib_period = 60;
         int change;
         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 
@@ -522,10 +673,8 @@ void iwl_rx_statistics(struct iwl_priv *priv,
                            STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
                            (pkt->u.stats_bt.flag &
                            STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
-#ifdef CONFIG_IWLWIFI_DEBUGFS
-                iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats_bt);
-#endif
 
+                iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats_bt);
         } else {
                 IWL_DEBUG_RX(priv,
                              "Statistics notification received (%d vs %d).\n",
@@ -539,10 +688,8 @@ void iwl_rx_statistics(struct iwl_priv *priv,
                            STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
                            (pkt->u.stats.flag &
                            STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
-#ifdef CONFIG_IWLWIFI_DEBUGFS
-                iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
-#endif
 
+                iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
         }
 
         iwl_recover_from_statistics(priv, pkt);
@@ -557,11 +704,11 @@ void iwl_rx_statistics(struct iwl_priv *priv,
         set_bit(STATUS_STATISTICS, &priv->status);
 
         /* Reschedule the statistics timer to occur in
-         * REG_RECALIB_PERIOD seconds to ensure we get a
+         * 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));
+                  msecs_to_jiffies(reg_recalib_period * 1000));
 
         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
@@ -572,8 +719,8 @@ void iwl_rx_statistics(struct iwl_priv *priv,
                 priv->cfg->ops->lib->temp_ops.temperature(priv);
 }
 
-void iwl_reply_statistics(struct iwl_priv *priv,
-                              struct iwl_rx_mem_buffer *rxb)
+static void iwl_rx_reply_statistics(struct iwl_priv *priv,
+                                    struct iwl_rx_mem_buffer *rxb)
 {
         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 
@@ -597,8 +744,61 @@ void iwl_reply_statistics(struct iwl_priv *priv,
         iwl_rx_statistics(priv, rxb);
 }
 
-void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
-                                struct iwl_rx_mem_buffer *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);
@@ -618,13 +818,25 @@ void iwl_rx_missed_beacon_notif(struct iwl_priv *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));
+}
+
 /*
  * 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);
 
@@ -669,3 +881,264 @@ int iwl_set_decrypted_flag(struct iwl_priv *priv,
         }
         return 0;
 }
+
+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;
+
+        /* 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 (!priv->cfg->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);
+        memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
+
+        ieee80211_rx(priv->hw, skb);
+        priv->alloc_rxb_page--;
+        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_ALIVE]                   = iwl_rx_reply_alive;
+        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);
+}