iwlegacy: merge iwl-4965-lib.c into 4965-mac.c
authorStanislaw Gruszka <sgruszka@redhat.com>
Tue, 30 Aug 2011 11:06:03 +0000 (13:06 +0200)
committerStanislaw Gruszka <sgruszka@redhat.com>
Tue, 15 Nov 2011 11:54:18 +0000 (12:54 +0100)
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
drivers/net/wireless/iwlegacy/4965-mac.c
drivers/net/wireless/iwlegacy/Makefile
drivers/net/wireless/iwlegacy/iwl-4965-lib.c [deleted file]

index b6f96b4b1f5c684f6bc2b3453364929033adcd4b..d817d8d3fe1884323cbc6c14ac7455be5da258ee 100644 (file)
@@ -86,6 +86,1158 @@ MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("iwl4965");
 
+void il4965_check_abort_status(struct il_priv *il,
+                           u8 frame_count, u32 status)
+{
+       if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
+               IL_ERR("Tx flush command to flush out all frames\n");
+               if (!test_bit(STATUS_EXIT_PENDING, &il->status))
+                       queue_work(il->workqueue, &il->tx_flush);
+       }
+}
+
+/*
+ * EEPROM
+ */
+struct il_mod_params il4965_mod_params = {
+       .amsdu_size_8K = 1,
+       .restart_fw = 1,
+       /* the rest are 0 by default */
+};
+
+void il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
+{
+       unsigned long flags;
+       int i;
+       spin_lock_irqsave(&rxq->lock, flags);
+       INIT_LIST_HEAD(&rxq->rx_free);
+       INIT_LIST_HEAD(&rxq->rx_used);
+       /* Fill the rx_used queue with _all_ of the Rx buffers */
+       for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
+               /* In the reset function, these buffers may have been allocated
+                * to an SKB, so we need to unmap and free potential storage */
+               if (rxq->pool[i].page != NULL) {
+                       pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
+                               PAGE_SIZE << il->hw_params.rx_page_order,
+                               PCI_DMA_FROMDEVICE);
+                       __il_free_pages(il, rxq->pool[i].page);
+                       rxq->pool[i].page = NULL;
+               }
+               list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
+       }
+
+       for (i = 0; i < RX_QUEUE_SIZE; i++)
+               rxq->queue[i] = NULL;
+
+       /* Set us so that we have processed and used all buffers, but have
+        * not restocked the Rx queue with fresh buffers */
+       rxq->read = rxq->write = 0;
+       rxq->write_actual = 0;
+       rxq->free_count = 0;
+       spin_unlock_irqrestore(&rxq->lock, flags);
+}
+
+int il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
+{
+       u32 rb_size;
+       const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
+       u32 rb_timeout = 0;
+
+       if (il->cfg->mod_params->amsdu_size_8K)
+               rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
+       else
+               rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
+
+       /* Stop Rx DMA */
+       il_wr(il, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
+
+       /* Reset driver's Rx queue write idx */
+       il_wr(il, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
+
+       /* Tell device where to find RBD circular buffer in DRAM */
+       il_wr(il, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
+                          (u32)(rxq->bd_dma >> 8));
+
+       /* Tell device where in DRAM to update its Rx status */
+       il_wr(il, FH_RSCSR_CHNL0_STTS_WPTR_REG,
+                          rxq->rb_stts_dma >> 4);
+
+       /* Enable Rx DMA
+        * Direct rx interrupts to hosts
+        * Rx buffer size 4 or 8k
+        * RB timeout 0x10
+        * 256 RBDs
+        */
+       il_wr(il, FH_MEM_RCSR_CHNL0_CONFIG_REG,
+                          FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
+                          FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
+                          FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
+                          rb_size|
+                          (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
+                          (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
+
+       /* Set interrupt coalescing timer to default (2048 usecs) */
+       il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
+
+       return 0;
+}
+
+static void il4965_set_pwr_vmain(struct il_priv *il)
+{
+/*
+ * (for documentation purposes)
+ * to set power to V_AUX, do:
+
+               if (pci_pme_capable(il->pci_dev, PCI_D3cold))
+                       il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
+                                              APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
+                                              ~APMG_PS_CTRL_MSK_PWR_SRC);
+ */
+
+       il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
+                              APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
+                              ~APMG_PS_CTRL_MSK_PWR_SRC);
+}
+
+int il4965_hw_nic_init(struct il_priv *il)
+{
+       unsigned long flags;
+       struct il_rx_queue *rxq = &il->rxq;
+       int ret;
+
+       /* nic_init */
+       spin_lock_irqsave(&il->lock, flags);
+       il->cfg->ops->lib->apm_ops.init(il);
+
+       /* Set interrupt coalescing calibration timer to default (512 usecs) */
+       il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
+
+       spin_unlock_irqrestore(&il->lock, flags);
+
+       il4965_set_pwr_vmain(il);
+
+       il->cfg->ops->lib->apm_ops.config(il);
+
+       /* Allocate the RX queue, or reset if it is already allocated */
+       if (!rxq->bd) {
+               ret = il_rx_queue_alloc(il);
+               if (ret) {
+                       IL_ERR("Unable to initialize Rx queue\n");
+                       return -ENOMEM;
+               }
+       } else
+               il4965_rx_queue_reset(il, rxq);
+
+       il4965_rx_replenish(il);
+
+       il4965_rx_init(il, rxq);
+
+       spin_lock_irqsave(&il->lock, flags);
+
+       rxq->need_update = 1;
+       il_rx_queue_update_write_ptr(il, rxq);
+
+       spin_unlock_irqrestore(&il->lock, flags);
+
+       /* Allocate or reset and init all Tx and Command queues */
+       if (!il->txq) {
+               ret = il4965_txq_ctx_alloc(il);
+               if (ret)
+                       return ret;
+       } else
+               il4965_txq_ctx_reset(il);
+
+       set_bit(STATUS_INIT, &il->status);
+
+       return 0;
+}
+
+/**
+ * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
+ */
+static inline __le32 il4965_dma_addr2rbd_ptr(struct il_priv *il,
+                                         dma_addr_t dma_addr)
+{
+       return cpu_to_le32((u32)(dma_addr >> 8));
+}
+
+/**
+ * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
+ *
+ * If there are slots in the RX queue that need to be restocked,
+ * and we have free pre-allocated buffers, fill the ranks as much
+ * as we can, pulling from rx_free.
+ *
+ * This moves the 'write' idx forward to catch up with 'processed', and
+ * also updates the memory address in the firmware to reference the new
+ * target buffer.
+ */
+void il4965_rx_queue_restock(struct il_priv *il)
+{
+       struct il_rx_queue *rxq = &il->rxq;
+       struct list_head *element;
+       struct il_rx_buf *rxb;
+       unsigned long flags;
+
+       spin_lock_irqsave(&rxq->lock, flags);
+       while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
+               /* The overwritten rxb must be a used one */
+               rxb = rxq->queue[rxq->write];
+               BUG_ON(rxb && rxb->page);
+
+               /* Get next free Rx buffer, remove from free list */
+               element = rxq->rx_free.next;
+               rxb = list_entry(element, struct il_rx_buf, list);
+               list_del(element);
+
+               /* Point to Rx buffer via next RBD in circular buffer */
+               rxq->bd[rxq->write] = il4965_dma_addr2rbd_ptr(il,
+                                                             rxb->page_dma);
+               rxq->queue[rxq->write] = rxb;
+               rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
+               rxq->free_count--;
+       }
+       spin_unlock_irqrestore(&rxq->lock, flags);
+       /* If the pre-allocated buffer pool is dropping low, schedule to
+        * refill it */
+       if (rxq->free_count <= RX_LOW_WATERMARK)
+               queue_work(il->workqueue, &il->rx_replenish);
+
+
+       /* If we've added more space for the firmware to place data, tell it.
+        * Increment device's write pointer in multiples of 8. */
+       if (rxq->write_actual != (rxq->write & ~0x7)) {
+               spin_lock_irqsave(&rxq->lock, flags);
+               rxq->need_update = 1;
+               spin_unlock_irqrestore(&rxq->lock, flags);
+               il_rx_queue_update_write_ptr(il, rxq);
+       }
+}
+
+/**
+ * il4965_rx_replenish - Move all used packet from rx_used to rx_free
+ *
+ * When moving to rx_free an SKB is allocated for the slot.
+ *
+ * Also restock the Rx queue via il_rx_queue_restock.
+ * This is called as a scheduled work item (except for during initialization)
+ */
+static void il4965_rx_allocate(struct il_priv *il, gfp_t priority)
+{
+       struct il_rx_queue *rxq = &il->rxq;
+       struct list_head *element;
+       struct il_rx_buf *rxb;
+       struct page *page;
+       unsigned long flags;
+       gfp_t gfp_mask = priority;
+
+       while (1) {
+               spin_lock_irqsave(&rxq->lock, flags);
+               if (list_empty(&rxq->rx_used)) {
+                       spin_unlock_irqrestore(&rxq->lock, flags);
+                       return;
+               }
+               spin_unlock_irqrestore(&rxq->lock, flags);
+
+               if (rxq->free_count > RX_LOW_WATERMARK)
+                       gfp_mask |= __GFP_NOWARN;
+
+               if (il->hw_params.rx_page_order > 0)
+                       gfp_mask |= __GFP_COMP;
+
+               /* Alloc a new receive buffer */
+               page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
+               if (!page) {
+                       if (net_ratelimit())
+                               D_INFO("alloc_pages failed, "
+                                              "order: %d\n",
+                                              il->hw_params.rx_page_order);
+
+                       if (rxq->free_count <= RX_LOW_WATERMARK &&
+                           net_ratelimit())
+                               IL_ERR(
+                                       "Failed to alloc_pages with %s. "
+                                       "Only %u free buffers remaining.\n",
+                                        priority == GFP_ATOMIC ?
+                                                "GFP_ATOMIC" : "GFP_KERNEL",
+                                        rxq->free_count);
+                       /* We don't reschedule replenish work here -- we will
+                        * call the restock method and if it still needs
+                        * more buffers it will schedule replenish */
+                       return;
+               }
+
+               spin_lock_irqsave(&rxq->lock, flags);
+
+               if (list_empty(&rxq->rx_used)) {
+                       spin_unlock_irqrestore(&rxq->lock, flags);
+                       __free_pages(page, il->hw_params.rx_page_order);
+                       return;
+               }
+               element = rxq->rx_used.next;
+               rxb = list_entry(element, struct il_rx_buf, list);
+               list_del(element);
+
+               spin_unlock_irqrestore(&rxq->lock, flags);
+
+               BUG_ON(rxb->page);
+               rxb->page = page;
+               /* Get physical address of the RB */
+               rxb->page_dma = pci_map_page(il->pci_dev, page, 0,
+                               PAGE_SIZE << il->hw_params.rx_page_order,
+                               PCI_DMA_FROMDEVICE);
+               /* dma address must be no more than 36 bits */
+               BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
+               /* and also 256 byte aligned! */
+               BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
+
+               spin_lock_irqsave(&rxq->lock, flags);
+
+               list_add_tail(&rxb->list, &rxq->rx_free);
+               rxq->free_count++;
+               il->alloc_rxb_page++;
+
+               spin_unlock_irqrestore(&rxq->lock, flags);
+       }
+}
+
+void il4965_rx_replenish(struct il_priv *il)
+{
+       unsigned long flags;
+
+       il4965_rx_allocate(il, GFP_KERNEL);
+
+       spin_lock_irqsave(&il->lock, flags);
+       il4965_rx_queue_restock(il);
+       spin_unlock_irqrestore(&il->lock, flags);
+}
+
+void il4965_rx_replenish_now(struct il_priv *il)
+{
+       il4965_rx_allocate(il, GFP_ATOMIC);
+
+       il4965_rx_queue_restock(il);
+}
+
+/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
+ * If an SKB has been detached, the POOL needs to have its SKB set to NULL
+ * This free routine walks the list of POOL entries and if SKB is set to
+ * non NULL it is unmapped and freed
+ */
+void il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
+{
+       int i;
+       for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
+               if (rxq->pool[i].page != NULL) {
+                       pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
+                               PAGE_SIZE << il->hw_params.rx_page_order,
+                               PCI_DMA_FROMDEVICE);
+                       __il_free_pages(il, rxq->pool[i].page);
+                       rxq->pool[i].page = NULL;
+               }
+       }
+
+       dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
+                         rxq->bd_dma);
+       dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
+                         rxq->rb_stts, rxq->rb_stts_dma);
+       rxq->bd = NULL;
+       rxq->rb_stts  = NULL;
+}
+
+int il4965_rxq_stop(struct il_priv *il)
+{
+
+       /* stop Rx DMA */
+       il_wr(il, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
+       il_poll_bit(il, FH_MEM_RSSR_RX_STATUS_REG,
+                           FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
+
+       return 0;
+}
+
+int il4965_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 = IL_FIRST_OFDM_RATE;
+               for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
+                       if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
+                               return idx - band_offset;
+       }
+
+       return -1;
+}
+
+static int il4965_calc_rssi(struct il_priv *il,
+                            struct il_rx_phy_res *rx_resp)
+{
+       /* data from PHY/DSP regarding signal strength, etc.,
+        *   contents are always there, not configurable by host.  */
+       struct il4965_rx_non_cfg_phy *ncphy =
+           (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
+       u32 agc = (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK)
+                       >> IL49_AGC_DB_POS;
+
+       u32 valid_antennae =
+           (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
+                       >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
+       u8 max_rssi = 0;
+       u32 i;
+
+       /* Find max rssi among 3 possible receivers.
+        * These values are measured by the digital signal processor (DSP).
+        * They should stay fairly constant even as the signal strength varies,
+        *   if the radio's automatic gain control (AGC) is working right.
+        * AGC value (see below) will provide the "interesting" info. */
+       for (i = 0; i < 3; i++)
+               if (valid_antennae & (1 << i))
+                       max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
+
+       D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
+               ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
+               max_rssi, agc);
+
+       /* dBm = max_rssi dB - agc dB - constant.
+        * Higher AGC (higher radio gain) means lower signal. */
+       return max_rssi - agc - IL4965_RSSI_OFFSET;
+}
+
+
+static u32 il4965_translate_rx_status(struct il_priv *il, 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;
+       }
+
+       D_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
+                                       decrypt_in, decrypt_out);
+
+       return decrypt_out;
+}
+
+static void il4965_pass_packet_to_mac80211(struct il_priv *il,
+                                       struct ieee80211_hdr *hdr,
+                                       u16 len,
+                                       u32 ampdu_status,
+                                       struct il_rx_buf *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(!il->is_open)) {
+               D_DROP(
+                   "Dropping packet while interface is not open.\n");
+               return;
+       }
+
+       /* In case of HW accelerated crypto and bad decryption, drop */
+       if (!il->cfg->mod_params->sw_crypto &&
+           il_set_decrypted_flag(il, hdr, ampdu_status, stats))
+               return;
+
+       skb = dev_alloc_skb(128);
+       if (!skb) {
+               IL_ERR("dev_alloc_skb failed\n");
+               return;
+       }
+
+       skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
+
+       il_update_stats(il, false, fc, len);
+       memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
+
+       ieee80211_rx(il->hw, skb);
+       il->alloc_rxb_page--;
+       rxb->page = NULL;
+}
+
+/* Called for REPLY_RX (legacy ABG frames), or
+ * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
+void il4965_rx_reply_rx(struct il_priv *il,
+                               struct il_rx_buf *rxb)
+{
+       struct ieee80211_hdr *header;
+       struct ieee80211_rx_status rx_status;
+       struct il_rx_pkt *pkt = rxb_addr(rxb);
+       struct il_rx_phy_res *phy_res;
+       __le32 rx_pkt_status;
+       struct il_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 il->last_phy_res
+        *
+        * Here we set up local variables depending on which command is
+        * received.
+        */
+       if (pkt->hdr.cmd == REPLY_RX) {
+               phy_res = (struct il_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 (!il->_4965.last_phy_res_valid) {
+                       IL_ERR("MPDU frame without cached PHY data\n");
+                       return;
+               }
+               phy_res = &il->_4965.last_phy_res;
+               amsdu = (struct il_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 = il4965_translate_rx_status(il,
+                               le32_to_cpu(rx_pkt_status));
+       }
+
+       if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
+               D_DROP("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)) {
+               D_RX("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 =
+               il4965_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;*/
+
+       il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
+
+       /* Find max signal strength (dBm) among 3 antenna/receiver chains */
+       rx_status.signal = il4965_calc_rssi(il, phy_res);
+
+       il_dbg_log_rx_data_frame(il, len, header);
+       D_STATS("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;
+
+       il4965_pass_packet_to_mac80211(il, header, len, ampdu_status,
+                                   rxb, &rx_status);
+}
+
+/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
+ * This will be used later in il_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
+void il4965_rx_reply_rx_phy(struct il_priv *il,
+                           struct il_rx_buf *rxb)
+{
+       struct il_rx_pkt *pkt = rxb_addr(rxb);
+       il->_4965.last_phy_res_valid = true;
+       memcpy(&il->_4965.last_phy_res, pkt->u.raw,
+              sizeof(struct il_rx_phy_res));
+}
+
+static int il4965_get_channels_for_scan(struct il_priv *il,
+                                    struct ieee80211_vif *vif,
+                                    enum ieee80211_band band,
+                                    u8 is_active, u8 n_probes,
+                                    struct il_scan_channel *scan_ch)
+{
+       struct ieee80211_channel *chan;
+       const struct ieee80211_supported_band *sband;
+       const struct il_channel_info *ch_info;
+       u16 passive_dwell = 0;
+       u16 active_dwell = 0;
+       int added, i;
+       u16 channel;
+
+       sband = il_get_hw_mode(il, band);
+       if (!sband)
+               return 0;
+
+       active_dwell = il_get_active_dwell_time(il, band, n_probes);
+       passive_dwell = il_get_passive_dwell_time(il, band, vif);
+
+       if (passive_dwell <= active_dwell)
+               passive_dwell = active_dwell + 1;
+
+       for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
+               chan = il->scan_request->channels[i];
+
+               if (chan->band != band)
+                       continue;
+
+               channel = chan->hw_value;
+               scan_ch->channel = cpu_to_le16(channel);
+
+               ch_info = il_get_channel_info(il, band, channel);
+               if (!il_is_channel_valid(ch_info)) {
+                       D_SCAN(
+                                "Channel %d is INVALID for this band.\n",
+                                       channel);
+                       continue;
+               }
+
+               if (!is_active || il_is_channel_passive(ch_info) ||
+                   (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
+                       scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+               else
+                       scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
+
+               if (n_probes)
+                       scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
+
+               scan_ch->active_dwell = cpu_to_le16(active_dwell);
+               scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+
+               /* Set txpower levels to defaults */
+               scan_ch->dsp_atten = 110;
+
+               /* NOTE: if we were doing 6Mb OFDM for scans we'd use
+                * power level:
+                * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
+                */
+               if (band == IEEE80211_BAND_5GHZ)
+                       scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+               else
+                       scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+
+               D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n",
+                              channel, le32_to_cpu(scan_ch->type),
+                              (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
+                               "ACTIVE" : "PASSIVE",
+                              (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
+                              active_dwell : passive_dwell);
+
+               scan_ch++;
+               added++;
+       }
+
+       D_SCAN("total channels to scan %d\n", added);
+       return added;
+}
+
+int il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
+{
+       struct il_host_cmd cmd = {
+               .id = REPLY_SCAN_CMD,
+               .len = sizeof(struct il_scan_cmd),
+               .flags = CMD_SIZE_HUGE,
+       };
+       struct il_scan_cmd *scan;
+       struct il_rxon_context *ctx = &il->ctx;
+       u32 rate_flags = 0;
+       u16 cmd_len;
+       u16 rx_chain = 0;
+       enum ieee80211_band band;
+       u8 n_probes = 0;
+       u8 rx_ant = il->hw_params.valid_rx_ant;
+       u8 rate;
+       bool is_active = false;
+       int  chan_mod;
+       u8 active_chains;
+       u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
+       int ret;
+
+       lockdep_assert_held(&il->mutex);
+
+       if (vif)
+               ctx = il_rxon_ctx_from_vif(vif);
+
+       if (!il->scan_cmd) {
+               il->scan_cmd = kmalloc(sizeof(struct il_scan_cmd) +
+                                        IL_MAX_SCAN_SIZE, GFP_KERNEL);
+               if (!il->scan_cmd) {
+                       D_SCAN(
+                                      "fail to allocate memory for scan\n");
+                       return -ENOMEM;
+               }
+       }
+       scan = il->scan_cmd;
+       memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
+
+       scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
+       scan->quiet_time = IL_ACTIVE_QUIET_TIME;
+
+       if (il_is_any_associated(il)) {
+               u16 interval;
+               u32 extra;
+               u32 suspend_time = 100;
+               u32 scan_suspend_time = 100;
+
+               D_INFO("Scanning while associated...\n");
+               interval = vif->bss_conf.beacon_int;
+
+               scan->suspend_time = 0;
+               scan->max_out_time = cpu_to_le32(200 * 1024);
+               if (!interval)
+                       interval = suspend_time;
+
+               extra = (suspend_time / interval) << 22;
+               scan_suspend_time = (extra |
+                   ((suspend_time % interval) * 1024));
+               scan->suspend_time = cpu_to_le32(scan_suspend_time);
+               D_SCAN("suspend_time 0x%X beacon interval %d\n",
+                              scan_suspend_time, interval);
+       }
+
+       if (il->scan_request->n_ssids) {
+               int i, p = 0;
+               D_SCAN("Kicking off active scan\n");
+               for (i = 0; i < il->scan_request->n_ssids; i++) {
+                       /* always does wildcard anyway */
+                       if (!il->scan_request->ssids[i].ssid_len)
+                               continue;
+                       scan->direct_scan[p].id = WLAN_EID_SSID;
+                       scan->direct_scan[p].len =
+                               il->scan_request->ssids[i].ssid_len;
+                       memcpy(scan->direct_scan[p].ssid,
+                              il->scan_request->ssids[i].ssid,
+                              il->scan_request->ssids[i].ssid_len);
+                       n_probes++;
+                       p++;
+               }
+               is_active = true;
+       } else
+               D_SCAN("Start passive scan.\n");
+
+       scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
+       scan->tx_cmd.sta_id = ctx->bcast_sta_id;
+       scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
+
+       switch (il->scan_band) {
+       case IEEE80211_BAND_2GHZ:
+               scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
+               chan_mod = le32_to_cpu(
+                       il->ctx.active.flags &
+                                               RXON_FLG_CHANNEL_MODE_MSK)
+                                      >> RXON_FLG_CHANNEL_MODE_POS;
+               if (chan_mod == CHANNEL_MODE_PURE_40) {
+                       rate = RATE_6M_PLCP;
+               } else {
+                       rate = RATE_1M_PLCP;
+                       rate_flags = RATE_MCS_CCK_MSK;
+               }
+               break;
+       case IEEE80211_BAND_5GHZ:
+               rate = RATE_6M_PLCP;
+               break;
+       default:
+               IL_WARN("Invalid scan band\n");
+               return -EIO;
+       }
+
+       /*
+        * If active scanning is requested but a certain channel is
+        * marked passive, we can do active scanning if we detect
+        * transmissions.
+        *
+        * There is an issue with some firmware versions that triggers
+        * a sysassert on a "good CRC threshold" of zero (== disabled),
+        * on a radar channel even though this means that we should NOT
+        * send probes.
+        *
+        * The "good CRC threshold" is the number of frames that we
+        * need to receive during our dwell time on a channel before
+        * sending out probes -- setting this to a huge value will
+        * mean we never reach it, but at the same time work around
+        * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
+        * here instead of IL_GOOD_CRC_TH_DISABLED.
+        */
+       scan->good_CRC_th = is_active ? IL_GOOD_CRC_TH_DEFAULT :
+                                       IL_GOOD_CRC_TH_NEVER;
+
+       band = il->scan_band;
+
+       if (il->cfg->scan_rx_antennas[band])
+               rx_ant = il->cfg->scan_rx_antennas[band];
+
+       il->scan_tx_ant[band] = il4965_toggle_tx_ant(il,
+                                               il->scan_tx_ant[band],
+                                                   scan_tx_antennas);
+       rate_flags |= il4965_ant_idx_to_flags(il->scan_tx_ant[band]);
+       scan->tx_cmd.rate_n_flags = il4965_hw_set_rate_n_flags(rate, rate_flags);
+
+       /* In power save mode use one chain, otherwise use all chains */
+       if (test_bit(STATUS_POWER_PMI, &il->status)) {
+               /* rx_ant has been set to all valid chains previously */
+               active_chains = rx_ant &
+                               ((u8)(il->chain_noise_data.active_chains));
+               if (!active_chains)
+                       active_chains = rx_ant;
+
+               D_SCAN("chain_noise_data.active_chains: %u\n",
+                               il->chain_noise_data.active_chains);
+
+               rx_ant = il4965_first_antenna(active_chains);
+       }
+
+       /* MIMO is not used here, but value is required */
+       rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
+       rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
+       rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
+       rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
+       scan->rx_chain = cpu_to_le16(rx_chain);
+
+       cmd_len = il_fill_probe_req(il,
+                                       (struct ieee80211_mgmt *)scan->data,
+                                       vif->addr,
+                                       il->scan_request->ie,
+                                       il->scan_request->ie_len,
+                                       IL_MAX_SCAN_SIZE - sizeof(*scan));
+       scan->tx_cmd.len = cpu_to_le16(cmd_len);
+
+       scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
+                              RXON_FILTER_BCON_AWARE_MSK);
+
+       scan->channel_count = il4965_get_channels_for_scan(il, vif, band,
+                                               is_active, n_probes,
+                                               (void *)&scan->data[cmd_len]);
+       if (scan->channel_count == 0) {
+               D_SCAN("channel count %d\n", scan->channel_count);
+               return -EIO;
+       }
+
+       cmd.len += le16_to_cpu(scan->tx_cmd.len) +
+           scan->channel_count * sizeof(struct il_scan_channel);
+       cmd.data = scan;
+       scan->len = cpu_to_le16(cmd.len);
+
+       set_bit(STATUS_SCAN_HW, &il->status);
+
+       ret = il_send_cmd_sync(il, &cmd);
+       if (ret)
+               clear_bit(STATUS_SCAN_HW, &il->status);
+
+       return ret;
+}
+
+int il4965_manage_ibss_station(struct il_priv *il,
+                              struct ieee80211_vif *vif, bool add)
+{
+       struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
+
+       if (add)
+               return il4965_add_bssid_station(il, vif_priv->ctx,
+                                               vif->bss_conf.bssid,
+                                               &vif_priv->ibss_bssid_sta_id);
+       return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
+                                 vif->bss_conf.bssid);
+}
+
+void il4965_free_tfds_in_queue(struct il_priv *il,
+                           int sta_id, int tid, int freed)
+{
+       lockdep_assert_held(&il->sta_lock);
+
+       if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
+               il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
+       else {
+               D_TX("free more than tfds_in_queue (%u:%d)\n",
+                       il->stations[sta_id].tid[tid].tfds_in_queue,
+                       freed);
+               il->stations[sta_id].tid[tid].tfds_in_queue = 0;
+       }
+}
+
+#define IL_TX_QUEUE_MSK        0xfffff
+
+static bool il4965_is_single_rx_stream(struct il_priv *il)
+{
+       return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
+              il->current_ht_config.single_chain_sufficient;
+}
+
+#define IL_NUM_RX_CHAINS_MULTIPLE      3
+#define IL_NUM_RX_CHAINS_SINGLE        2
+#define IL_NUM_IDLE_CHAINS_DUAL        2
+#define IL_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 il4965_get_active_rx_chain_count(struct il_priv *il)
+{
+       /* # of Rx chains to use when expecting MIMO. */
+       if (il4965_is_single_rx_stream(il))
+               return IL_NUM_RX_CHAINS_SINGLE;
+       else
+               return IL_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
+il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
+{
+       /* # Rx chains when idling, depending on SMPS mode */
+       switch (il->current_ht_config.smps) {
+       case IEEE80211_SMPS_STATIC:
+       case IEEE80211_SMPS_DYNAMIC:
+               return IL_NUM_IDLE_CHAINS_SINGLE;
+       case IEEE80211_SMPS_OFF:
+               return active_cnt;
+       default:
+               WARN(1, "invalid SMPS mode %d",
+                    il->current_ht_config.smps);
+               return active_cnt;
+       }
+}
+
+/* up to 4 chains */
+static u8 il4965_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;
+}
+
+/**
+ * il4965_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 il4965_set_rxon_chain(struct il_priv *il, struct il_rxon_context *ctx)
+{
+       bool is_single = il4965_is_single_rx_stream(il);
+       bool is_cam = !test_bit(STATUS_POWER_PMI, &il->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, il4965_chain_noise_calibration()
+        *    checks which antennas actually *are* connected. */
+       if (il->chain_noise_data.active_chains)
+               active_chains = il->chain_noise_data.active_chains;
+       else
+               active_chains = il->hw_params.valid_rx_ant;
+
+       rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
+
+       /* How many receivers should we use? */
+       active_rx_cnt = il4965_get_active_rx_chain_count(il);
+       idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
+
+
+       /* correct rx chain count according hw settings
+        * and chain noise calibration
+        */
+       valid_rx_cnt = il4965_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;
+
+       ctx->staging.rx_chain = cpu_to_le16(rx_chain);
+
+       if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
+               ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
+       else
+               ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
+
+       D_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
+                       ctx->staging.rx_chain,
+                       active_rx_cnt, idle_rx_cnt);
+
+       WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
+               active_rx_cnt < idle_rx_cnt);
+}
+
+u8 il4965_toggle_tx_ant(struct il_priv *il, u8 ant, u8 valid)
+{
+       int i;
+       u8 ind = ant;
+
+       for (i = 0; i < RATE_ANT_NUM - 1; i++) {
+               ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
+               if (valid & BIT(ind))
+                       return ind;
+       }
+       return ant;
+}
+
+static const char *il4965_get_fh_string(int cmd)
+{
+       switch (cmd) {
+       IL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
+       IL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
+       IL_CMD(FH_RSCSR_CHNL0_WPTR);
+       IL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
+       IL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
+       IL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
+       IL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
+       IL_CMD(FH_TSSR_TX_STATUS_REG);
+       IL_CMD(FH_TSSR_TX_ERROR_REG);
+       default:
+               return "UNKNOWN";
+       }
+}
+
+int il4965_dump_fh(struct il_priv *il, char **buf, bool display)
+{
+       int i;
+#ifdef CONFIG_IWLEGACY_DEBUG
+       int pos = 0;
+       size_t bufsz = 0;
+#endif
+       static const u32 fh_tbl[] = {
+               FH_RSCSR_CHNL0_STTS_WPTR_REG,
+               FH_RSCSR_CHNL0_RBDCB_BASE_REG,
+               FH_RSCSR_CHNL0_WPTR,
+               FH_MEM_RCSR_CHNL0_CONFIG_REG,
+               FH_MEM_RSSR_SHARED_CTRL_REG,
+               FH_MEM_RSSR_RX_STATUS_REG,
+               FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
+               FH_TSSR_TX_STATUS_REG,
+               FH_TSSR_TX_ERROR_REG
+       };
+#ifdef CONFIG_IWLEGACY_DEBUG
+       if (display) {
+               bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
+               *buf = kmalloc(bufsz, GFP_KERNEL);
+               if (!*buf)
+                       return -ENOMEM;
+               pos += scnprintf(*buf + pos, bufsz - pos,
+                               "FH register values:\n");
+               for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
+                       pos += scnprintf(*buf + pos, bufsz - pos,
+                               "  %34s: 0X%08x\n",
+                               il4965_get_fh_string(fh_tbl[i]),
+                               il_rd(il, fh_tbl[i]));
+               }
+               return pos;
+       }
+#endif
+       IL_ERR("FH register values:\n");
+       for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
+               IL_ERR("  %34s: 0X%08x\n",
+                       il4965_get_fh_string(fh_tbl[i]),
+                       il_rd(il, fh_tbl[i]));
+       }
+       return 0;
+}
 void il4965_rx_missed_beacon_notif(struct il_priv *il,
                                struct il_rx_buf *rxb)
 
index 88447047922320d1d8fc2db91876bee7e4a673b8..d0f9f23feea91aac0a3b1956f56a599f69fb91f2 100644 (file)
@@ -9,7 +9,7 @@ iwl-legacy-objs += $(iwl-legacy-m)
 # 4965
 obj-$(CONFIG_IWL4965)  += iwl4965.o
 iwl4965-objs           := 4965.o 4965-mac.o iwl-4965-rs.o
-iwl4965-objs           += iwl-4965-lib.o iwl-4965-calib.o
+iwl4965-objs           += iwl-4965-calib.o
 iwl4965-$(CONFIG_IWLEGACY_DEBUGFS) += iwl-4965-debugfs.o
 
 # 3945
diff --git a/drivers/net/wireless/iwlegacy/iwl-4965-lib.c b/drivers/net/wireless/iwlegacy/iwl-4965-lib.c
deleted file mode 100644 (file)
index bbec6bd..0000000
+++ /dev/null
@@ -1,1194 +0,0 @@
-/******************************************************************************
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 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/etherdevice.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-
-#include "iwl-dev.h"
-#include "iwl-core.h"
-#include "iwl-io.h"
-#include "iwl-helpers.h"
-#include "iwl-4965-hw.h"
-#include "iwl-4965.h"
-#include "iwl-sta.h"
-
-void il4965_check_abort_status(struct il_priv *il,
-                           u8 frame_count, u32 status)
-{
-       if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
-               IL_ERR("Tx flush command to flush out all frames\n");
-               if (!test_bit(STATUS_EXIT_PENDING, &il->status))
-                       queue_work(il->workqueue, &il->tx_flush);
-       }
-}
-
-/*
- * EEPROM
- */
-struct il_mod_params il4965_mod_params = {
-       .amsdu_size_8K = 1,
-       .restart_fw = 1,
-       /* the rest are 0 by default */
-};
-
-void il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
-{
-       unsigned long flags;
-       int i;
-       spin_lock_irqsave(&rxq->lock, flags);
-       INIT_LIST_HEAD(&rxq->rx_free);
-       INIT_LIST_HEAD(&rxq->rx_used);
-       /* Fill the rx_used queue with _all_ of the Rx buffers */
-       for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
-               /* In the reset function, these buffers may have been allocated
-                * to an SKB, so we need to unmap and free potential storage */
-               if (rxq->pool[i].page != NULL) {
-                       pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
-                               PAGE_SIZE << il->hw_params.rx_page_order,
-                               PCI_DMA_FROMDEVICE);
-                       __il_free_pages(il, rxq->pool[i].page);
-                       rxq->pool[i].page = NULL;
-               }
-               list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
-       }
-
-       for (i = 0; i < RX_QUEUE_SIZE; i++)
-               rxq->queue[i] = NULL;
-
-       /* Set us so that we have processed and used all buffers, but have
-        * not restocked the Rx queue with fresh buffers */
-       rxq->read = rxq->write = 0;
-       rxq->write_actual = 0;
-       rxq->free_count = 0;
-       spin_unlock_irqrestore(&rxq->lock, flags);
-}
-
-int il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
-{
-       u32 rb_size;
-       const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
-       u32 rb_timeout = 0;
-
-       if (il->cfg->mod_params->amsdu_size_8K)
-               rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
-       else
-               rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
-
-       /* Stop Rx DMA */
-       il_wr(il, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
-
-       /* Reset driver's Rx queue write idx */
-       il_wr(il, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
-
-       /* Tell device where to find RBD circular buffer in DRAM */
-       il_wr(il, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
-                          (u32)(rxq->bd_dma >> 8));
-
-       /* Tell device where in DRAM to update its Rx status */
-       il_wr(il, FH_RSCSR_CHNL0_STTS_WPTR_REG,
-                          rxq->rb_stts_dma >> 4);
-
-       /* Enable Rx DMA
-        * Direct rx interrupts to hosts
-        * Rx buffer size 4 or 8k
-        * RB timeout 0x10
-        * 256 RBDs
-        */
-       il_wr(il, FH_MEM_RCSR_CHNL0_CONFIG_REG,
-                          FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
-                          FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
-                          FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
-                          rb_size|
-                          (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
-                          (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
-
-       /* Set interrupt coalescing timer to default (2048 usecs) */
-       il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
-
-       return 0;
-}
-
-static void il4965_set_pwr_vmain(struct il_priv *il)
-{
-/*
- * (for documentation purposes)
- * to set power to V_AUX, do:
-
-               if (pci_pme_capable(il->pci_dev, PCI_D3cold))
-                       il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
-                                              APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
-                                              ~APMG_PS_CTRL_MSK_PWR_SRC);
- */
-
-       il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
-                              APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
-                              ~APMG_PS_CTRL_MSK_PWR_SRC);
-}
-
-int il4965_hw_nic_init(struct il_priv *il)
-{
-       unsigned long flags;
-       struct il_rx_queue *rxq = &il->rxq;
-       int ret;
-
-       /* nic_init */
-       spin_lock_irqsave(&il->lock, flags);
-       il->cfg->ops->lib->apm_ops.init(il);
-
-       /* Set interrupt coalescing calibration timer to default (512 usecs) */
-       il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
-
-       spin_unlock_irqrestore(&il->lock, flags);
-
-       il4965_set_pwr_vmain(il);
-
-       il->cfg->ops->lib->apm_ops.config(il);
-
-       /* Allocate the RX queue, or reset if it is already allocated */
-       if (!rxq->bd) {
-               ret = il_rx_queue_alloc(il);
-               if (ret) {
-                       IL_ERR("Unable to initialize Rx queue\n");
-                       return -ENOMEM;
-               }
-       } else
-               il4965_rx_queue_reset(il, rxq);
-
-       il4965_rx_replenish(il);
-
-       il4965_rx_init(il, rxq);
-
-       spin_lock_irqsave(&il->lock, flags);
-
-       rxq->need_update = 1;
-       il_rx_queue_update_write_ptr(il, rxq);
-
-       spin_unlock_irqrestore(&il->lock, flags);
-
-       /* Allocate or reset and init all Tx and Command queues */
-       if (!il->txq) {
-               ret = il4965_txq_ctx_alloc(il);
-               if (ret)
-                       return ret;
-       } else
-               il4965_txq_ctx_reset(il);
-
-       set_bit(STATUS_INIT, &il->status);
-
-       return 0;
-}
-
-/**
- * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
- */
-static inline __le32 il4965_dma_addr2rbd_ptr(struct il_priv *il,
-                                         dma_addr_t dma_addr)
-{
-       return cpu_to_le32((u32)(dma_addr >> 8));
-}
-
-/**
- * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
- *
- * If there are slots in the RX queue that need to be restocked,
- * and we have free pre-allocated buffers, fill the ranks as much
- * as we can, pulling from rx_free.
- *
- * This moves the 'write' idx forward to catch up with 'processed', and
- * also updates the memory address in the firmware to reference the new
- * target buffer.
- */
-void il4965_rx_queue_restock(struct il_priv *il)
-{
-       struct il_rx_queue *rxq = &il->rxq;
-       struct list_head *element;
-       struct il_rx_buf *rxb;
-       unsigned long flags;
-
-       spin_lock_irqsave(&rxq->lock, flags);
-       while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
-               /* The overwritten rxb must be a used one */
-               rxb = rxq->queue[rxq->write];
-               BUG_ON(rxb && rxb->page);
-
-               /* Get next free Rx buffer, remove from free list */
-               element = rxq->rx_free.next;
-               rxb = list_entry(element, struct il_rx_buf, list);
-               list_del(element);
-
-               /* Point to Rx buffer via next RBD in circular buffer */
-               rxq->bd[rxq->write] = il4965_dma_addr2rbd_ptr(il,
-                                                             rxb->page_dma);
-               rxq->queue[rxq->write] = rxb;
-               rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
-               rxq->free_count--;
-       }
-       spin_unlock_irqrestore(&rxq->lock, flags);
-       /* If the pre-allocated buffer pool is dropping low, schedule to
-        * refill it */
-       if (rxq->free_count <= RX_LOW_WATERMARK)
-               queue_work(il->workqueue, &il->rx_replenish);
-
-
-       /* If we've added more space for the firmware to place data, tell it.
-        * Increment device's write pointer in multiples of 8. */
-       if (rxq->write_actual != (rxq->write & ~0x7)) {
-               spin_lock_irqsave(&rxq->lock, flags);
-               rxq->need_update = 1;
-               spin_unlock_irqrestore(&rxq->lock, flags);
-               il_rx_queue_update_write_ptr(il, rxq);
-       }
-}
-
-/**
- * il4965_rx_replenish - Move all used packet from rx_used to rx_free
- *
- * When moving to rx_free an SKB is allocated for the slot.
- *
- * Also restock the Rx queue via il_rx_queue_restock.
- * This is called as a scheduled work item (except for during initialization)
- */
-static void il4965_rx_allocate(struct il_priv *il, gfp_t priority)
-{
-       struct il_rx_queue *rxq = &il->rxq;
-       struct list_head *element;
-       struct il_rx_buf *rxb;
-       struct page *page;
-       unsigned long flags;
-       gfp_t gfp_mask = priority;
-
-       while (1) {
-               spin_lock_irqsave(&rxq->lock, flags);
-               if (list_empty(&rxq->rx_used)) {
-                       spin_unlock_irqrestore(&rxq->lock, flags);
-                       return;
-               }
-               spin_unlock_irqrestore(&rxq->lock, flags);
-
-               if (rxq->free_count > RX_LOW_WATERMARK)
-                       gfp_mask |= __GFP_NOWARN;
-
-               if (il->hw_params.rx_page_order > 0)
-                       gfp_mask |= __GFP_COMP;
-
-               /* Alloc a new receive buffer */
-               page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
-               if (!page) {
-                       if (net_ratelimit())
-                               D_INFO("alloc_pages failed, "
-                                              "order: %d\n",
-                                              il->hw_params.rx_page_order);
-
-                       if (rxq->free_count <= RX_LOW_WATERMARK &&
-                           net_ratelimit())
-                               IL_ERR(
-                                       "Failed to alloc_pages with %s. "
-                                       "Only %u free buffers remaining.\n",
-                                        priority == GFP_ATOMIC ?
-                                                "GFP_ATOMIC" : "GFP_KERNEL",
-                                        rxq->free_count);
-                       /* We don't reschedule replenish work here -- we will
-                        * call the restock method and if it still needs
-                        * more buffers it will schedule replenish */
-                       return;
-               }
-
-               spin_lock_irqsave(&rxq->lock, flags);
-
-               if (list_empty(&rxq->rx_used)) {
-                       spin_unlock_irqrestore(&rxq->lock, flags);
-                       __free_pages(page, il->hw_params.rx_page_order);
-                       return;
-               }
-               element = rxq->rx_used.next;
-               rxb = list_entry(element, struct il_rx_buf, list);
-               list_del(element);
-
-               spin_unlock_irqrestore(&rxq->lock, flags);
-
-               BUG_ON(rxb->page);
-               rxb->page = page;
-               /* Get physical address of the RB */
-               rxb->page_dma = pci_map_page(il->pci_dev, page, 0,
-                               PAGE_SIZE << il->hw_params.rx_page_order,
-                               PCI_DMA_FROMDEVICE);
-               /* dma address must be no more than 36 bits */
-               BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
-               /* and also 256 byte aligned! */
-               BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
-
-               spin_lock_irqsave(&rxq->lock, flags);
-
-               list_add_tail(&rxb->list, &rxq->rx_free);
-               rxq->free_count++;
-               il->alloc_rxb_page++;
-
-               spin_unlock_irqrestore(&rxq->lock, flags);
-       }
-}
-
-void il4965_rx_replenish(struct il_priv *il)
-{
-       unsigned long flags;
-
-       il4965_rx_allocate(il, GFP_KERNEL);
-
-       spin_lock_irqsave(&il->lock, flags);
-       il4965_rx_queue_restock(il);
-       spin_unlock_irqrestore(&il->lock, flags);
-}
-
-void il4965_rx_replenish_now(struct il_priv *il)
-{
-       il4965_rx_allocate(il, GFP_ATOMIC);
-
-       il4965_rx_queue_restock(il);
-}
-
-/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
- * If an SKB has been detached, the POOL needs to have its SKB set to NULL
- * This free routine walks the list of POOL entries and if SKB is set to
- * non NULL it is unmapped and freed
- */
-void il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
-{
-       int i;
-       for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
-               if (rxq->pool[i].page != NULL) {
-                       pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
-                               PAGE_SIZE << il->hw_params.rx_page_order,
-                               PCI_DMA_FROMDEVICE);
-                       __il_free_pages(il, rxq->pool[i].page);
-                       rxq->pool[i].page = NULL;
-               }
-       }
-
-       dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
-                         rxq->bd_dma);
-       dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
-                         rxq->rb_stts, rxq->rb_stts_dma);
-       rxq->bd = NULL;
-       rxq->rb_stts  = NULL;
-}
-
-int il4965_rxq_stop(struct il_priv *il)
-{
-
-       /* stop Rx DMA */
-       il_wr(il, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
-       il_poll_bit(il, FH_MEM_RSSR_RX_STATUS_REG,
-                           FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
-
-       return 0;
-}
-
-int il4965_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 = IL_FIRST_OFDM_RATE;
-               for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
-                       if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
-                               return idx - band_offset;
-       }
-
-       return -1;
-}
-
-static int il4965_calc_rssi(struct il_priv *il,
-                            struct il_rx_phy_res *rx_resp)
-{
-       /* data from PHY/DSP regarding signal strength, etc.,
-        *   contents are always there, not configurable by host.  */
-       struct il4965_rx_non_cfg_phy *ncphy =
-           (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
-       u32 agc = (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK)
-                       >> IL49_AGC_DB_POS;
-
-       u32 valid_antennae =
-           (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
-                       >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
-       u8 max_rssi = 0;
-       u32 i;
-
-       /* Find max rssi among 3 possible receivers.
-        * These values are measured by the digital signal processor (DSP).
-        * They should stay fairly constant even as the signal strength varies,
-        *   if the radio's automatic gain control (AGC) is working right.
-        * AGC value (see below) will provide the "interesting" info. */
-       for (i = 0; i < 3; i++)
-               if (valid_antennae & (1 << i))
-                       max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
-
-       D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
-               ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
-               max_rssi, agc);
-
-       /* dBm = max_rssi dB - agc dB - constant.
-        * Higher AGC (higher radio gain) means lower signal. */
-       return max_rssi - agc - IL4965_RSSI_OFFSET;
-}
-
-
-static u32 il4965_translate_rx_status(struct il_priv *il, 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;
-       }
-
-       D_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
-                                       decrypt_in, decrypt_out);
-
-       return decrypt_out;
-}
-
-static void il4965_pass_packet_to_mac80211(struct il_priv *il,
-                                       struct ieee80211_hdr *hdr,
-                                       u16 len,
-                                       u32 ampdu_status,
-                                       struct il_rx_buf *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(!il->is_open)) {
-               D_DROP(
-                   "Dropping packet while interface is not open.\n");
-               return;
-       }
-
-       /* In case of HW accelerated crypto and bad decryption, drop */
-       if (!il->cfg->mod_params->sw_crypto &&
-           il_set_decrypted_flag(il, hdr, ampdu_status, stats))
-               return;
-
-       skb = dev_alloc_skb(128);
-       if (!skb) {
-               IL_ERR("dev_alloc_skb failed\n");
-               return;
-       }
-
-       skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
-
-       il_update_stats(il, false, fc, len);
-       memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
-
-       ieee80211_rx(il->hw, skb);
-       il->alloc_rxb_page--;
-       rxb->page = NULL;
-}
-
-/* Called for REPLY_RX (legacy ABG frames), or
- * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
-void il4965_rx_reply_rx(struct il_priv *il,
-                               struct il_rx_buf *rxb)
-{
-       struct ieee80211_hdr *header;
-       struct ieee80211_rx_status rx_status;
-       struct il_rx_pkt *pkt = rxb_addr(rxb);
-       struct il_rx_phy_res *phy_res;
-       __le32 rx_pkt_status;
-       struct il_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 il->last_phy_res
-        *
-        * Here we set up local variables depending on which command is
-        * received.
-        */
-       if (pkt->hdr.cmd == REPLY_RX) {
-               phy_res = (struct il_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 (!il->_4965.last_phy_res_valid) {
-                       IL_ERR("MPDU frame without cached PHY data\n");
-                       return;
-               }
-               phy_res = &il->_4965.last_phy_res;
-               amsdu = (struct il_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 = il4965_translate_rx_status(il,
-                               le32_to_cpu(rx_pkt_status));
-       }
-
-       if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
-               D_DROP("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)) {
-               D_RX("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 =
-               il4965_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;*/
-
-       il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
-
-       /* Find max signal strength (dBm) among 3 antenna/receiver chains */
-       rx_status.signal = il4965_calc_rssi(il, phy_res);
-
-       il_dbg_log_rx_data_frame(il, len, header);
-       D_STATS("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;
-
-       il4965_pass_packet_to_mac80211(il, header, len, ampdu_status,
-                                   rxb, &rx_status);
-}
-
-/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
- * This will be used later in il_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
-void il4965_rx_reply_rx_phy(struct il_priv *il,
-                           struct il_rx_buf *rxb)
-{
-       struct il_rx_pkt *pkt = rxb_addr(rxb);
-       il->_4965.last_phy_res_valid = true;
-       memcpy(&il->_4965.last_phy_res, pkt->u.raw,
-              sizeof(struct il_rx_phy_res));
-}
-
-static int il4965_get_channels_for_scan(struct il_priv *il,
-                                    struct ieee80211_vif *vif,
-                                    enum ieee80211_band band,
-                                    u8 is_active, u8 n_probes,
-                                    struct il_scan_channel *scan_ch)
-{
-       struct ieee80211_channel *chan;
-       const struct ieee80211_supported_band *sband;
-       const struct il_channel_info *ch_info;
-       u16 passive_dwell = 0;
-       u16 active_dwell = 0;
-       int added, i;
-       u16 channel;
-
-       sband = il_get_hw_mode(il, band);
-       if (!sband)
-               return 0;
-
-       active_dwell = il_get_active_dwell_time(il, band, n_probes);
-       passive_dwell = il_get_passive_dwell_time(il, band, vif);
-
-       if (passive_dwell <= active_dwell)
-               passive_dwell = active_dwell + 1;
-
-       for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
-               chan = il->scan_request->channels[i];
-
-               if (chan->band != band)
-                       continue;
-
-               channel = chan->hw_value;
-               scan_ch->channel = cpu_to_le16(channel);
-
-               ch_info = il_get_channel_info(il, band, channel);
-               if (!il_is_channel_valid(ch_info)) {
-                       D_SCAN(
-                                "Channel %d is INVALID for this band.\n",
-                                       channel);
-                       continue;
-               }
-
-               if (!is_active || il_is_channel_passive(ch_info) ||
-                   (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
-                       scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
-               else
-                       scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
-
-               if (n_probes)
-                       scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
-
-               scan_ch->active_dwell = cpu_to_le16(active_dwell);
-               scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
-
-               /* Set txpower levels to defaults */
-               scan_ch->dsp_atten = 110;
-
-               /* NOTE: if we were doing 6Mb OFDM for scans we'd use
-                * power level:
-                * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
-                */
-               if (band == IEEE80211_BAND_5GHZ)
-                       scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
-               else
-                       scan_ch->tx_gain = ((1 << 5) | (5 << 3));
-
-               D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n",
-                              channel, le32_to_cpu(scan_ch->type),
-                              (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
-                               "ACTIVE" : "PASSIVE",
-                              (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
-                              active_dwell : passive_dwell);
-
-               scan_ch++;
-               added++;
-       }
-
-       D_SCAN("total channels to scan %d\n", added);
-       return added;
-}
-
-int il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
-{
-       struct il_host_cmd cmd = {
-               .id = REPLY_SCAN_CMD,
-               .len = sizeof(struct il_scan_cmd),
-               .flags = CMD_SIZE_HUGE,
-       };
-       struct il_scan_cmd *scan;
-       struct il_rxon_context *ctx = &il->ctx;
-       u32 rate_flags = 0;
-       u16 cmd_len;
-       u16 rx_chain = 0;
-       enum ieee80211_band band;
-       u8 n_probes = 0;
-       u8 rx_ant = il->hw_params.valid_rx_ant;
-       u8 rate;
-       bool is_active = false;
-       int  chan_mod;
-       u8 active_chains;
-       u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
-       int ret;
-
-       lockdep_assert_held(&il->mutex);
-
-       if (vif)
-               ctx = il_rxon_ctx_from_vif(vif);
-
-       if (!il->scan_cmd) {
-               il->scan_cmd = kmalloc(sizeof(struct il_scan_cmd) +
-                                        IL_MAX_SCAN_SIZE, GFP_KERNEL);
-               if (!il->scan_cmd) {
-                       D_SCAN(
-                                      "fail to allocate memory for scan\n");
-                       return -ENOMEM;
-               }
-       }
-       scan = il->scan_cmd;
-       memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
-
-       scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
-       scan->quiet_time = IL_ACTIVE_QUIET_TIME;
-
-       if (il_is_any_associated(il)) {
-               u16 interval;
-               u32 extra;
-               u32 suspend_time = 100;
-               u32 scan_suspend_time = 100;
-
-               D_INFO("Scanning while associated...\n");
-               interval = vif->bss_conf.beacon_int;
-
-               scan->suspend_time = 0;
-               scan->max_out_time = cpu_to_le32(200 * 1024);
-               if (!interval)
-                       interval = suspend_time;
-
-               extra = (suspend_time / interval) << 22;
-               scan_suspend_time = (extra |
-                   ((suspend_time % interval) * 1024));
-               scan->suspend_time = cpu_to_le32(scan_suspend_time);
-               D_SCAN("suspend_time 0x%X beacon interval %d\n",
-                              scan_suspend_time, interval);
-       }
-
-       if (il->scan_request->n_ssids) {
-               int i, p = 0;
-               D_SCAN("Kicking off active scan\n");
-               for (i = 0; i < il->scan_request->n_ssids; i++) {
-                       /* always does wildcard anyway */
-                       if (!il->scan_request->ssids[i].ssid_len)
-                               continue;
-                       scan->direct_scan[p].id = WLAN_EID_SSID;
-                       scan->direct_scan[p].len =
-                               il->scan_request->ssids[i].ssid_len;
-                       memcpy(scan->direct_scan[p].ssid,
-                              il->scan_request->ssids[i].ssid,
-                              il->scan_request->ssids[i].ssid_len);
-                       n_probes++;
-                       p++;
-               }
-               is_active = true;
-       } else
-               D_SCAN("Start passive scan.\n");
-
-       scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
-       scan->tx_cmd.sta_id = ctx->bcast_sta_id;
-       scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
-
-       switch (il->scan_band) {
-       case IEEE80211_BAND_2GHZ:
-               scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
-               chan_mod = le32_to_cpu(
-                       il->ctx.active.flags &
-                                               RXON_FLG_CHANNEL_MODE_MSK)
-                                      >> RXON_FLG_CHANNEL_MODE_POS;
-               if (chan_mod == CHANNEL_MODE_PURE_40) {
-                       rate = RATE_6M_PLCP;
-               } else {
-                       rate = RATE_1M_PLCP;
-                       rate_flags = RATE_MCS_CCK_MSK;
-               }
-               break;
-       case IEEE80211_BAND_5GHZ:
-               rate = RATE_6M_PLCP;
-               break;
-       default:
-               IL_WARN("Invalid scan band\n");
-               return -EIO;
-       }
-
-       /*
-        * If active scanning is requested but a certain channel is
-        * marked passive, we can do active scanning if we detect
-        * transmissions.
-        *
-        * There is an issue with some firmware versions that triggers
-        * a sysassert on a "good CRC threshold" of zero (== disabled),
-        * on a radar channel even though this means that we should NOT
-        * send probes.
-        *
-        * The "good CRC threshold" is the number of frames that we
-        * need to receive during our dwell time on a channel before
-        * sending out probes -- setting this to a huge value will
-        * mean we never reach it, but at the same time work around
-        * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
-        * here instead of IL_GOOD_CRC_TH_DISABLED.
-        */
-       scan->good_CRC_th = is_active ? IL_GOOD_CRC_TH_DEFAULT :
-                                       IL_GOOD_CRC_TH_NEVER;
-
-       band = il->scan_band;
-
-       if (il->cfg->scan_rx_antennas[band])
-               rx_ant = il->cfg->scan_rx_antennas[band];
-
-       il->scan_tx_ant[band] = il4965_toggle_tx_ant(il,
-                                               il->scan_tx_ant[band],
-                                                   scan_tx_antennas);
-       rate_flags |= il4965_ant_idx_to_flags(il->scan_tx_ant[band]);
-       scan->tx_cmd.rate_n_flags = il4965_hw_set_rate_n_flags(rate, rate_flags);
-
-       /* In power save mode use one chain, otherwise use all chains */
-       if (test_bit(STATUS_POWER_PMI, &il->status)) {
-               /* rx_ant has been set to all valid chains previously */
-               active_chains = rx_ant &
-                               ((u8)(il->chain_noise_data.active_chains));
-               if (!active_chains)
-                       active_chains = rx_ant;
-
-               D_SCAN("chain_noise_data.active_chains: %u\n",
-                               il->chain_noise_data.active_chains);
-
-               rx_ant = il4965_first_antenna(active_chains);
-       }
-
-       /* MIMO is not used here, but value is required */
-       rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
-       rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
-       rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
-       rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
-       scan->rx_chain = cpu_to_le16(rx_chain);
-
-       cmd_len = il_fill_probe_req(il,
-                                       (struct ieee80211_mgmt *)scan->data,
-                                       vif->addr,
-                                       il->scan_request->ie,
-                                       il->scan_request->ie_len,
-                                       IL_MAX_SCAN_SIZE - sizeof(*scan));
-       scan->tx_cmd.len = cpu_to_le16(cmd_len);
-
-       scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
-                              RXON_FILTER_BCON_AWARE_MSK);
-
-       scan->channel_count = il4965_get_channels_for_scan(il, vif, band,
-                                               is_active, n_probes,
-                                               (void *)&scan->data[cmd_len]);
-       if (scan->channel_count == 0) {
-               D_SCAN("channel count %d\n", scan->channel_count);
-               return -EIO;
-       }
-
-       cmd.len += le16_to_cpu(scan->tx_cmd.len) +
-           scan->channel_count * sizeof(struct il_scan_channel);
-       cmd.data = scan;
-       scan->len = cpu_to_le16(cmd.len);
-
-       set_bit(STATUS_SCAN_HW, &il->status);
-
-       ret = il_send_cmd_sync(il, &cmd);
-       if (ret)
-               clear_bit(STATUS_SCAN_HW, &il->status);
-
-       return ret;
-}
-
-int il4965_manage_ibss_station(struct il_priv *il,
-                              struct ieee80211_vif *vif, bool add)
-{
-       struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
-
-       if (add)
-               return il4965_add_bssid_station(il, vif_priv->ctx,
-                                               vif->bss_conf.bssid,
-                                               &vif_priv->ibss_bssid_sta_id);
-       return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
-                                 vif->bss_conf.bssid);
-}
-
-void il4965_free_tfds_in_queue(struct il_priv *il,
-                           int sta_id, int tid, int freed)
-{
-       lockdep_assert_held(&il->sta_lock);
-
-       if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
-               il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
-       else {
-               D_TX("free more than tfds_in_queue (%u:%d)\n",
-                       il->stations[sta_id].tid[tid].tfds_in_queue,
-                       freed);
-               il->stations[sta_id].tid[tid].tfds_in_queue = 0;
-       }
-}
-
-#define IL_TX_QUEUE_MSK        0xfffff
-
-static bool il4965_is_single_rx_stream(struct il_priv *il)
-{
-       return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
-              il->current_ht_config.single_chain_sufficient;
-}
-
-#define IL_NUM_RX_CHAINS_MULTIPLE      3
-#define IL_NUM_RX_CHAINS_SINGLE        2
-#define IL_NUM_IDLE_CHAINS_DUAL        2
-#define IL_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 il4965_get_active_rx_chain_count(struct il_priv *il)
-{
-       /* # of Rx chains to use when expecting MIMO. */
-       if (il4965_is_single_rx_stream(il))
-               return IL_NUM_RX_CHAINS_SINGLE;
-       else
-               return IL_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
-il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
-{
-       /* # Rx chains when idling, depending on SMPS mode */
-       switch (il->current_ht_config.smps) {
-       case IEEE80211_SMPS_STATIC:
-       case IEEE80211_SMPS_DYNAMIC:
-               return IL_NUM_IDLE_CHAINS_SINGLE;
-       case IEEE80211_SMPS_OFF:
-               return active_cnt;
-       default:
-               WARN(1, "invalid SMPS mode %d",
-                    il->current_ht_config.smps);
-               return active_cnt;
-       }
-}
-
-/* up to 4 chains */
-static u8 il4965_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;
-}
-
-/**
- * il4965_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 il4965_set_rxon_chain(struct il_priv *il, struct il_rxon_context *ctx)
-{
-       bool is_single = il4965_is_single_rx_stream(il);
-       bool is_cam = !test_bit(STATUS_POWER_PMI, &il->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, il4965_chain_noise_calibration()
-        *    checks which antennas actually *are* connected. */
-       if (il->chain_noise_data.active_chains)
-               active_chains = il->chain_noise_data.active_chains;
-       else
-               active_chains = il->hw_params.valid_rx_ant;
-
-       rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
-
-       /* How many receivers should we use? */
-       active_rx_cnt = il4965_get_active_rx_chain_count(il);
-       idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
-
-
-       /* correct rx chain count according hw settings
-        * and chain noise calibration
-        */
-       valid_rx_cnt = il4965_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;
-
-       ctx->staging.rx_chain = cpu_to_le16(rx_chain);
-
-       if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
-               ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
-       else
-               ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
-
-       D_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
-                       ctx->staging.rx_chain,
-                       active_rx_cnt, idle_rx_cnt);
-
-       WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
-               active_rx_cnt < idle_rx_cnt);
-}
-
-u8 il4965_toggle_tx_ant(struct il_priv *il, u8 ant, u8 valid)
-{
-       int i;
-       u8 ind = ant;
-
-       for (i = 0; i < RATE_ANT_NUM - 1; i++) {
-               ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
-               if (valid & BIT(ind))
-                       return ind;
-       }
-       return ant;
-}
-
-static const char *il4965_get_fh_string(int cmd)
-{
-       switch (cmd) {
-       IL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
-       IL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
-       IL_CMD(FH_RSCSR_CHNL0_WPTR);
-       IL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
-       IL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
-       IL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
-       IL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
-       IL_CMD(FH_TSSR_TX_STATUS_REG);
-       IL_CMD(FH_TSSR_TX_ERROR_REG);
-       default:
-               return "UNKNOWN";
-       }
-}
-
-int il4965_dump_fh(struct il_priv *il, char **buf, bool display)
-{
-       int i;
-#ifdef CONFIG_IWLEGACY_DEBUG
-       int pos = 0;
-       size_t bufsz = 0;
-#endif
-       static const u32 fh_tbl[] = {
-               FH_RSCSR_CHNL0_STTS_WPTR_REG,
-               FH_RSCSR_CHNL0_RBDCB_BASE_REG,
-               FH_RSCSR_CHNL0_WPTR,
-               FH_MEM_RCSR_CHNL0_CONFIG_REG,
-               FH_MEM_RSSR_SHARED_CTRL_REG,
-               FH_MEM_RSSR_RX_STATUS_REG,
-               FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
-               FH_TSSR_TX_STATUS_REG,
-               FH_TSSR_TX_ERROR_REG
-       };
-#ifdef CONFIG_IWLEGACY_DEBUG
-       if (display) {
-               bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
-               *buf = kmalloc(bufsz, GFP_KERNEL);
-               if (!*buf)
-                       return -ENOMEM;
-               pos += scnprintf(*buf + pos, bufsz - pos,
-                               "FH register values:\n");
-               for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
-                       pos += scnprintf(*buf + pos, bufsz - pos,
-                               "  %34s: 0X%08x\n",
-                               il4965_get_fh_string(fh_tbl[i]),
-                               il_rd(il, fh_tbl[i]));
-               }
-               return pos;
-       }
-#endif
-       IL_ERR("FH register values:\n");
-       for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
-               IL_ERR("  %34s: 0X%08x\n",
-                       il4965_get_fh_string(fh_tbl[i]),
-                       il_rd(il, fh_tbl[i]));
-       }
-       return 0;
-}