mwifiex: use map/unmap APIs in TX and RX to reduce memcpy

This patch is an enhacement to mwifiex_pcie driver to use
map/unmap PCI memory APIs. This reduces one memcpy each in TX
path and RX path, and enhances throughput.
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/11n_aggr.c

@@ -278,14 +278,16 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
 		dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
 		break;
 	case -1:
-		adapter->data_sent = false;
+		if (adapter->iface_type != MWIFIEX_PCIE)
+			adapter->data_sent = false;
 		dev_err(adapter->dev, "%s: host_to_card failed: %#x\n",
 			__func__, ret);
 		adapter->dbg.num_tx_host_to_card_failure++;
 		mwifiex_write_data_complete(adapter, skb_aggr, 1, ret);
 		return 0;
 	case -EINPROGRESS:
-		adapter->data_sent = false;
+		if (adapter->iface_type != MWIFIEX_PCIE)
+			adapter->data_sent = false;
 		break;
 	case 0:
 		mwifiex_write_data_complete(adapter, skb_aggr, 1, ret);

drivers/net/wireless/mwifiex/pcie.h

@@ -159,4 +159,15 @@ mwifiex_pcie_txbd_empty(struct pcie_service_card *card, u32 rdptr)
 	return 0;
 }
 
+static inline int
+mwifiex_pcie_txbd_not_full(struct pcie_service_card *card)
+{
+	if (((card->txbd_wrptr & MWIFIEX_TXBD_MASK) !=
+	     (card->txbd_rdptr & MWIFIEX_TXBD_MASK)) ||
+	    ((card->txbd_wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) !=
+	     (card->txbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND)))
+		return 1;
+
+	return 0;
+}
 #endif /* _MWIFIEX_PCIE_H */

drivers/net/wireless/mwifiex/txrx.c

@@ -117,14 +117,16 @@ int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
 		dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
 		break;
 	case -1:
-		adapter->data_sent = false;
+		if (adapter->iface_type != MWIFIEX_PCIE)
+			adapter->data_sent = false;
 		dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n",
 			ret);
 		adapter->dbg.num_tx_host_to_card_failure++;
 		mwifiex_write_data_complete(adapter, skb, 0, ret);
 		break;
 	case -EINPROGRESS:
-		adapter->data_sent = false;
+		if (adapter->iface_type != MWIFIEX_PCIE)
+			adapter->data_sent = false;
 		break;
 	case 0:
 		mwifiex_write_data_complete(adapter, skb, 0, ret);

drivers/net/wireless/mwifiex/wmm.c

@@ -1208,13 +1208,15 @@ mwifiex_send_processed_packet(struct mwifiex_private *priv,
 				       ra_list_flags);
 		break;
 	case -1:
-		adapter->data_sent = false;
+		if (adapter->iface_type != MWIFIEX_PCIE)
+			adapter->data_sent = false;
 		dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
 		adapter->dbg.num_tx_host_to_card_failure++;
 		mwifiex_write_data_complete(adapter, skb, 0, ret);
 		break;
 	case -EINPROGRESS:
-		adapter->data_sent = false;
+		if (adapter->iface_type != MWIFIEX_PCIE)
+			adapter->data_sent = false;
 	default:
 		break;
 	}