1 files changed, 91 insertions, 165 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 7cde9d76ff5..c5f1aa0feac 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -22,7 +22,7 @@
  * file called LICENSE.
  *
  * Contact Information:
- * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ *  Intel Linux Wireless <ilw@linux.intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  *****************************************************************************/
@@ -204,7 +204,7 @@ int iwl_rx_queue_restock(struct iwl_priv *priv)
 		list_del(element);
 
 		/* Point to Rx buffer via next RBD in circular buffer */
-		rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
+		rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->aligned_dma_addr);
 		rxq->queue[rxq->write] = rxb;
 		rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 		rxq->free_count--;
@@ -218,8 +218,7 @@ int iwl_rx_queue_restock(struct iwl_priv *priv)
 
 	/* If we've added more space for the firmware to place data, tell it.
 	 * Increment device's write pointer in multiples of 8. */
-	if ((write != (rxq->write & ~0x7))
-	    || (abs(rxq->write - rxq->read) > 7)) {
+	if (write != (rxq->write & ~0x7)) {
 		spin_lock_irqsave(&rxq->lock, flags);
 		rxq->need_update = 1;
 		spin_unlock_irqrestore(&rxq->lock, flags);
@@ -245,36 +244,53 @@ void iwl_rx_allocate(struct iwl_priv *priv)
 	struct list_head *element;
 	struct iwl_rx_mem_buffer *rxb;
 	unsigned long flags;
-	spin_lock_irqsave(&rxq->lock, flags);
-	while (!list_empty(&rxq->rx_used)) {
+
+	while (1) {
+		spin_lock_irqsave(&rxq->lock, flags);
+
+		if (list_empty(&rxq->rx_used)) {
+			spin_unlock_irqrestore(&rxq->lock, flags);
+			return;
+		}
 		element = rxq->rx_used.next;
 		rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
+		list_del(element);
+
+		spin_unlock_irqrestore(&rxq->lock, flags);
 
 		/* Alloc a new receive buffer */
-		rxb->skb = alloc_skb(priv->hw_params.rx_buf_size,
-				__GFP_NOWARN | GFP_ATOMIC);
+		rxb->skb = alloc_skb(priv->hw_params.rx_buf_size + 256,
+				     GFP_KERNEL);
 		if (!rxb->skb) {
-			if (net_ratelimit())
-				printk(KERN_CRIT DRV_NAME
-				       ": Can not allocate SKB buffers\n");
+			printk(KERN_CRIT DRV_NAME
+				   "Can not allocate SKB buffers\n");
 			/* We don't reschedule replenish work here -- we will
 			 * call the restock method and if it still needs
 			 * more buffers it will schedule replenish */
 			break;
 		}
-		priv->alloc_rxb_skb++;
-		list_del(element);
 
 		/* Get physical address of RB/SKB */
-		rxb->dma_addr =
-		    pci_map_single(priv->pci_dev, rxb->skb->data,
-			   priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
+		rxb->real_dma_addr = pci_map_single(
+					priv->pci_dev,
+					rxb->skb->data,
+					priv->hw_params.rx_buf_size + 256,
+					PCI_DMA_FROMDEVICE);
+		/* dma address must be no more than 36 bits */
+		BUG_ON(rxb->real_dma_addr & ~DMA_BIT_MASK(36));
+		/* and also 256 byte aligned! */
+		rxb->aligned_dma_addr = ALIGN(rxb->real_dma_addr, 256);
+		skb_reserve(rxb->skb, rxb->aligned_dma_addr - rxb->real_dma_addr);
+
+		spin_lock_irqsave(&rxq->lock, flags);
+
 		list_add_tail(&rxb->list, &rxq->rx_free);
 		rxq->free_count++;
+		priv->alloc_rxb_skb++;
+
+		spin_unlock_irqrestore(&rxq->lock, flags);
 	}
-	spin_unlock_irqrestore(&rxq->lock, flags);
 }
-EXPORT_SYMBOL(iwl_rx_allocate);
 
 void iwl_rx_replenish(struct iwl_priv *priv)
 {
@@ -300,8 +316,8 @@ void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 	for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
 		if (rxq->pool[i].skb != NULL) {
 			pci_unmap_single(priv->pci_dev,
-					 rxq->pool[i].dma_addr,
-					 priv->hw_params.rx_buf_size,
+					 rxq->pool[i].real_dma_addr,
+					 priv->hw_params.rx_buf_size + 256,
 					 PCI_DMA_FROMDEVICE);
 			dev_kfree_skb(rxq->pool[i].skb);
 		}
@@ -309,7 +325,10 @@ void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 
 	pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
 			    rxq->dma_addr);
+	pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
+			    rxq->rb_stts, rxq->rb_stts_dma);
 	rxq->bd = NULL;
+	rxq->rb_stts  = NULL;
 }
 EXPORT_SYMBOL(iwl_rx_queue_free);
 
@@ -326,7 +345,12 @@ int iwl_rx_queue_alloc(struct iwl_priv *priv)
 	/* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
 	rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
 	if (!rxq->bd)
-		return -ENOMEM;
+		goto err_bd;
+
+	rxq->rb_stts = pci_alloc_consistent(dev, sizeof(struct iwl_rb_status),
+					&rxq->rb_stts_dma);
+	if (!rxq->rb_stts)
+		goto err_rb;
 
 	/* Fill the rx_used queue with _all_ of the Rx buffers */
 	for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
@@ -338,6 +362,12 @@ int iwl_rx_queue_alloc(struct iwl_priv *priv)
 	rxq->free_count = 0;
 	rxq->need_update = 0;
 	return 0;
+
+err_rb:
+	pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
+			    rxq->dma_addr);
+err_bd:
+	return -ENOMEM;
 }
 EXPORT_SYMBOL(iwl_rx_queue_alloc);
 
@@ -354,8 +384,8 @@ void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 		 * to an SKB, so we need to unmap and free potential storage */
 		if (rxq->pool[i].skb != NULL) {
 			pci_unmap_single(priv->pci_dev,
-					 rxq->pool[i].dma_addr,
-					 priv->hw_params.rx_buf_size,
+					 rxq->pool[i].real_dma_addr,
+					 priv->hw_params.rx_buf_size + 256,
 					 PCI_DMA_FROMDEVICE);
 			priv->alloc_rxb_skb--;
 			dev_kfree_skb(rxq->pool[i].skb);
@@ -404,10 +434,10 @@ int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 
 	/* Tell device where in DRAM to update its Rx status */
 	iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
-			   (priv->shared_phys + priv->rb_closed_offset) >> 4);
+			   rxq->rb_stts_dma >> 4);
 
 	/* Enable Rx DMA
-	 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set becuase of HW bug in
+	 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
 	 *      the credit mechanism in 5000 HW RX FIFO
 	 * Direct rx interrupts to hosts
 	 * Rx buffer size 4 or 8k
@@ -418,6 +448,7 @@ int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 			   FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 			   FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
 			   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));
@@ -445,10 +476,8 @@ int iwl_rxq_stop(struct iwl_priv *priv)
 
 	/* stop Rx DMA */
 	iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
-	ret = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
-				     (1 << 24), 1000);
-	if (ret < 0)
-		IWL_ERROR("Can't stop Rx DMA.\n");
+	iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
+			    FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
 
 	iwl_release_nic_access(priv);
 	spin_unlock_irqrestore(&priv->lock, flags);
@@ -462,7 +491,7 @@ void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
 
 {
 	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
-	struct iwl4965_missed_beacon_notif *missed_beacon;
+	struct iwl_missed_beacon_notif *missed_beacon;
 
 	missed_beacon = &pkt->u.missed_beacon;
 	if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
@@ -477,49 +506,6 @@ void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
 }
 EXPORT_SYMBOL(iwl_rx_missed_beacon_notif);
 
-int iwl_rx_agg_start(struct iwl_priv *priv, const u8 *addr, int tid, u16 ssn)
-{
-	unsigned long flags;
-	int sta_id;
-
-	sta_id = iwl_find_station(priv, addr);
-	if (sta_id == IWL_INVALID_STATION)
-		return -ENXIO;
-
-	spin_lock_irqsave(&priv->sta_lock, flags);
-	priv->stations[sta_id].sta.station_flags_msk = 0;
-	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
-	priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
-	priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
-	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
-	spin_unlock_irqrestore(&priv->sta_lock, flags);
-
-	return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
-					CMD_ASYNC);
-}
-EXPORT_SYMBOL(iwl_rx_agg_start);
-
-int iwl_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
-{
-	unsigned long flags;
-	int sta_id;
-
-	sta_id = iwl_find_station(priv, addr);
-	if (sta_id == IWL_INVALID_STATION)
-		return -ENXIO;
-
-	spin_lock_irqsave(&priv->sta_lock, flags);
-	priv->stations[sta_id].sta.station_flags_msk = 0;
-	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
-	priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
-	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
-	spin_unlock_irqrestore(&priv->sta_lock, flags);
-
-	return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
-					CMD_ASYNC);
-}
-EXPORT_SYMBOL(iwl_rx_agg_stop);
-
 
 /* Calculate noise level, based on measurements during network silence just
  *   before arriving beacon.  This measurement can be done only if we know
@@ -643,20 +629,24 @@ static int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
 	return sig_qual;
 }
 
-#ifdef CONFIG_IWLWIFI_DEBUG
+/* Calc max signal level (dBm) among 3 possible receivers */
+static inline int iwl_calc_rssi(struct iwl_priv *priv,
+				struct iwl_rx_phy_res *rx_resp)
+{
+	return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
+}
 
+#ifdef CONFIG_IWLWIFI_DEBUG
 /**
  * iwl_dbg_report_frame - dump frame to syslog during debug sessions
  *
  * You may hack this function to show different aspects of received frames,
  * including selective frame dumps.
- * group100 parameter selects whether to show 1 out of 100 good frames.
- *
- * TODO:  This was originally written for 3945, need to audit for
- *        proper operation with 4965.
+ * group100 parameter selects whether to show 1 out of 100 good data frames.
+ *    All beacon and probe response frames are printed.
  */
 static void iwl_dbg_report_frame(struct iwl_priv *priv,
-		      struct iwl_rx_packet *pkt,
+		      struct iwl_rx_phy_res *phy_res, u16 length,
 		      struct ieee80211_hdr *header, int group100)
 {
 	u32 to_us;
@@ -668,20 +658,9 @@ static void iwl_dbg_report_frame(struct iwl_priv *priv,
 	u16 seq_ctl;
 	u16 channel;
 	u16 phy_flags;
-	int rate_sym;
-	u16 length;
-	u16 status;
-	u16 bcn_tmr;
+	u32 rate_n_flags;
 	u32 tsf_low;
-	u64 tsf;
-	u8 rssi;
-	u8 agc;
-	u16 sig_avg;
-	u16 noise_diff;
-	struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
-	struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
-	struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
-	u8 *data = IWL_RX_DATA(pkt);
+	int rssi;
 
 	if (likely(!(priv->debug_level & IWL_DL_RX)))
 		return;
@@ -691,22 +670,13 @@ static void iwl_dbg_report_frame(struct iwl_priv *priv,
 	seq_ctl = le16_to_cpu(header->seq_ctrl);
 
 	/* metadata */
-	channel = le16_to_cpu(rx_hdr->channel);
-	phy_flags = le16_to_cpu(rx_hdr->phy_flags);
-	rate_sym = rx_hdr->rate;
-	length = le16_to_cpu(rx_hdr->len);
-
-	/* end-of-frame status and timestamp */
-	status = le32_to_cpu(rx_end->status);
-	bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
-	tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
-	tsf = le64_to_cpu(rx_end->timestamp);
+	channel = le16_to_cpu(phy_res->channel);
+	phy_flags = le16_to_cpu(phy_res->phy_flags);
+	rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
 
 	/* signal statistics */
-	rssi = rx_stats->rssi;
-	agc = rx_stats->agc;
-	sig_avg = le16_to_cpu(rx_stats->sig_avg);
-	noise_diff = le16_to_cpu(rx_stats->noise_diff);
+	rssi = iwl_calc_rssi(priv, phy_res);
+	tsf_low = le64_to_cpu(phy_res->timestamp) & 0x0ffffffff;
 
 	to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
 
@@ -760,11 +730,13 @@ static void iwl_dbg_report_frame(struct iwl_priv *priv,
 		else
 			title = "Frame";
 
-		rate_idx = iwl_hwrate_to_plcp_idx(rate_sym);
-		if (unlikely(rate_idx == -1))
+		rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
+		if (unlikely((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT))) {
 			bitrate = 0;
-		else
+			WARN_ON_ONCE(1);
+		} else {
 			bitrate = iwl_rates[rate_idx].ieee / 2;
+		}
 
 		/* print frame summary.
 		 * MAC addresses show just the last byte (for brevity),
@@ -776,24 +748,17 @@ static void iwl_dbg_report_frame(struct iwl_priv *priv,
 				     length, rssi, channel, bitrate);
 		else {
 			/* src/dst addresses assume managed mode */
-			IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
-				     "src=0x%02x, rssi=%u, tim=%lu usec, "
+			IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, src=0x%02x, "
+				     "len=%u, rssi=%d, tim=%lu usec, "
 				     "phy=0x%02x, chnl=%d\n",
 				     title, le16_to_cpu(fc), header->addr1[5],
-				     header->addr3[5], rssi,
+				     header->addr3[5], length, rssi,
 				     tsf_low - priv->scan_start_tsf,
 				     phy_flags, channel);
 		}
 	}
 	if (print_dump)
-		iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
-}
-#else
-static inline void iwl_dbg_report_frame(struct iwl_priv *priv,
-					    struct iwl_rx_packet *pkt,
-					    struct ieee80211_hdr *header,
-					    int group100)
-{
+		iwl_print_hex_dump(priv, IWL_DL_RX, header, length);
 }
 #endif
 
@@ -987,46 +952,6 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
 	rxb->skb = NULL;
 }
 
-/* Calc max signal level (dBm) among 3 possible receivers */
-static inline int iwl_calc_rssi(struct iwl_priv *priv,
-				struct iwl_rx_phy_res *rx_resp)
-{
-	return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
-}
-
-
-static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv->sta_lock, flags);
-	priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
-	priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
-	priv->stations[sta_id].sta.sta.modify_mask = 0;
-	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
-	spin_unlock_irqrestore(&priv->sta_lock, flags);
-
-	iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
-}
-
-static void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
-{
-	/* FIXME: need locking over ps_status ??? */
-	u8 sta_id = iwl_find_station(priv, addr);
-
-	if (sta_id != IWL_INVALID_STATION) {
-		u8 sta_awake = priv->stations[sta_id].
-				ps_status == STA_PS_STATUS_WAKE;
-
-		if (sta_awake && ps_bit)
-			priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
-		else if (!sta_awake && !ps_bit) {
-			iwl_sta_modify_ps_wake(priv, sta_id);
-			priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
-		}
-	}
-}
-
 /* This is necessary only for a number of statistics, see the caller. */
 static int iwl_is_network_packet(struct iwl_priv *priv,
 		struct ieee80211_hdr *header)
@@ -1149,9 +1074,10 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
 		priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 
 	/* Set "1" to report good data frames in groups of 100 */
-	/* FIXME: need to optimze the call: */
-	iwl_dbg_report_frame(priv, pkt, header, 1);
-
+#ifdef CONFIG_IWLWIFI_DEBUG
+	if (unlikely(priv->debug_level & IWL_DL_RX))
+		iwl_dbg_report_frame(priv, rx_start, len, header, 1);
+#endif
 	IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
 		rx_status.signal, rx_status.noise, rx_status.signal,
 		(unsigned long long)rx_status.mactime);
@@ -1160,12 +1086,12 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
 	 * "antenna number"
 	 *
 	 * It seems that the antenna field in the phy flags value
-	 * is actually a bitfield. This is undefined by radiotap,
+	 * 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 favour of a
+	 * I think this field should be removed in favor of a
 	 * new 802.11n radiotap field "RX chains" that is defined
 	 * as a bitmask.
 	 */