1 files changed, 109 insertions, 250 deletions

diff --git a/drivers/net/wireless/libertas/rx.c b/drivers/net/wireless/libertas/rx.c
index 0420e5b9ff9..e446fed7b34 100644
--- a/drivers/net/wireless/libertas/rx.c
+++ b/drivers/net/wireless/libertas/rx.c
@@ -1,20 +1,28 @@
-/**
-  * This file contains the handling of RX in wlan driver.
-  */
+/*
+ * This file contains the handling of RX in wlan driver.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/etherdevice.h>
+#include <linux/hardirq.h>
+#include <linux/slab.h>
 #include <linux/types.h>
+#include <linux/export.h>
+#include <net/cfg80211.h>
 
-#include "hostcmd.h"
+#include "defs.h"
+#include "host.h"
 #include "radiotap.h"
 #include "decl.h"
 #include "dev.h"
-#include "wext.h"
+#include "mesh.h"
 
 struct eth803hdr {
 	u8 dest_addr[6];
 	u8 src_addr[6];
 	u16 h803_len;
-} __attribute__ ((packed));
+} __packed;
 
 struct rfc1042hdr {
 	u8 llc_dsap;
@@ -22,190 +30,72 @@ struct rfc1042hdr {
 	u8 llc_ctrl;
 	u8 snap_oui[3];
 	u16 snap_type;
-} __attribute__ ((packed));
+} __packed;
 
 struct rxpackethdr {
-	struct rxpd rx_pd;
 	struct eth803hdr eth803_hdr;
 	struct rfc1042hdr rfc1042_hdr;
-} __attribute__ ((packed));
+} __packed;
 
 struct rx80211packethdr {
 	struct rxpd rx_pd;
 	void *eth80211_hdr;
-} __attribute__ ((packed));
+} __packed;
 
-static int process_rxed_802_11_packet(wlan_private * priv, struct sk_buff *skb);
-
-/**
- *  @brief This function computes the avgSNR .
- *
- *  @param priv    A pointer to wlan_private structure
- *  @return 	   avgSNR
- */
-static u8 wlan_getavgsnr(wlan_private * priv)
-{
-	u8 i;
-	u16 temp = 0;
-	wlan_adapter *adapter = priv->adapter;
-	if (adapter->numSNRNF == 0)
-		return 0;
-	for (i = 0; i < adapter->numSNRNF; i++)
-		temp += adapter->rawSNR[i];
-	return (u8) (temp / adapter->numSNRNF);
-
-}
-
-/**
- *  @brief This function computes the AvgNF
- *
- *  @param priv    A pointer to wlan_private structure
- *  @return 	   AvgNF
- */
-static u8 wlan_getavgnf(wlan_private * priv)
-{
-	u8 i;
-	u16 temp = 0;
-	wlan_adapter *adapter = priv->adapter;
-	if (adapter->numSNRNF == 0)
-		return 0;
-	for (i = 0; i < adapter->numSNRNF; i++)
-		temp += adapter->rawNF[i];
-	return (u8) (temp / adapter->numSNRNF);
-
-}
+static int process_rxed_802_11_packet(struct lbs_private *priv,
+	struct sk_buff *skb);
 
 /**
- *  @brief This function save the raw SNR/NF to our internel buffer
+ * lbs_process_rxed_packet - processes received packet and forwards it
+ * to kernel/upper layer
  *
- *  @param priv    A pointer to wlan_private structure
- *  @param prxpd   A pointer to rxpd structure of received packet
- *  @return 	   n/a
+ * @priv:	A pointer to &struct lbs_private
+ * @skb:	A pointer to skb which includes the received packet
+ * returns:	0 or -1
  */
-static void wlan_save_rawSNRNF(wlan_private * priv, struct rxpd *p_rx_pd)
+int lbs_process_rxed_packet(struct lbs_private *priv, struct sk_buff *skb)
 {
-	wlan_adapter *adapter = priv->adapter;
-	if (adapter->numSNRNF < DEFAULT_DATA_AVG_FACTOR)
-		adapter->numSNRNF++;
-	adapter->rawSNR[adapter->nextSNRNF] = p_rx_pd->snr;
-	adapter->rawNF[adapter->nextSNRNF] = p_rx_pd->nf;
-	adapter->nextSNRNF++;
-	if (adapter->nextSNRNF >= DEFAULT_DATA_AVG_FACTOR)
-		adapter->nextSNRNF = 0;
-	return;
-}
-
-/**
- *  @brief This function computes the RSSI in received packet.
- *
- *  @param priv    A pointer to wlan_private structure
- *  @param prxpd   A pointer to rxpd structure of received packet
- *  @return 	   n/a
- */
-static void wlan_compute_rssi(wlan_private * priv, struct rxpd *p_rx_pd)
-{
-	wlan_adapter *adapter = priv->adapter;
-
-	lbs_deb_enter(LBS_DEB_RX);
-
-	lbs_deb_rx("rxpd: SNR %d, NF %d\n", p_rx_pd->snr, p_rx_pd->nf);
-	lbs_deb_rx("before computing SNR: SNR-avg = %d, NF-avg = %d\n",
-	       adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE,
-	       adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE);
-
-	adapter->SNR[TYPE_RXPD][TYPE_NOAVG] = p_rx_pd->snr;
-	adapter->NF[TYPE_RXPD][TYPE_NOAVG] = p_rx_pd->nf;
-	wlan_save_rawSNRNF(priv, p_rx_pd);
-
-	adapter->SNR[TYPE_RXPD][TYPE_AVG] = wlan_getavgsnr(priv) * AVG_SCALE;
-	adapter->NF[TYPE_RXPD][TYPE_AVG] = wlan_getavgnf(priv) * AVG_SCALE;
-	lbs_deb_rx("after computing SNR: SNR-avg = %d, NF-avg = %d\n",
-	       adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE,
-	       adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE);
-
-	adapter->RSSI[TYPE_RXPD][TYPE_NOAVG] =
-	    CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_NOAVG],
-		     adapter->NF[TYPE_RXPD][TYPE_NOAVG]);
-
-	adapter->RSSI[TYPE_RXPD][TYPE_AVG] =
-	    CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE,
-		     adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE);
-
-	lbs_deb_leave(LBS_DEB_RX);
-}
-
-void libertas_upload_rx_packet(wlan_private * priv, struct sk_buff *skb)
-{
-	lbs_deb_rx("skb->data %p\n", skb->data);
-
-	if (priv->adapter->monitormode != WLAN_MONITOR_OFF) {
-		skb->protocol = eth_type_trans(skb, priv->rtap_net_dev);
-	} else {
-		if (priv->mesh_dev && IS_MESH_FRAME(skb))
-			skb->protocol = eth_type_trans(skb, priv->mesh_dev);
-		else
-			skb->protocol = eth_type_trans(skb, priv->dev);
-	}
-	skb->ip_summed = CHECKSUM_UNNECESSARY;
-	netif_rx(skb);
-}
-
-/**
- *  @brief This function processes received packet and forwards it
- *  to kernel/upper layer
- *
- *  @param priv    A pointer to wlan_private
- *  @param skb     A pointer to skb which includes the received packet
- *  @return 	   0 or -1
- */
-int libertas_process_rxed_packet(wlan_private * priv, struct sk_buff *skb)
-{
-	wlan_adapter *adapter = priv->adapter;
 	int ret = 0;
-
+	struct net_device *dev = priv->dev;
 	struct rxpackethdr *p_rx_pkt;
 	struct rxpd *p_rx_pd;
-
 	int hdrchop;
 	struct ethhdr *p_ethhdr;
-
-	const u8 rfc1042_eth_hdr[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
+	static const u8 rfc1042_eth_hdr[] = {
+		0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
+	};
 
 	lbs_deb_enter(LBS_DEB_RX);
 
-	if (priv->adapter->monitormode != WLAN_MONITOR_OFF)
-		return process_rxed_802_11_packet(priv, skb);
+	BUG_ON(!skb);
 
-	p_rx_pkt = (struct rxpackethdr *) skb->data;
-	p_rx_pd = &p_rx_pkt->rx_pd;
-	if (p_rx_pd->rx_control & RxPD_MESH_FRAME)
-		SET_MESH_FRAME(skb);
-	else
-		UNSET_MESH_FRAME(skb);
+	skb->ip_summed = CHECKSUM_NONE;
+
+	if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
+		ret = process_rxed_802_11_packet(priv, skb);
+		goto done;
+	}
+
+	p_rx_pd = (struct rxpd *) skb->data;
+	p_rx_pkt = (struct rxpackethdr *) ((u8 *)p_rx_pd +
+		le32_to_cpu(p_rx_pd->pkt_ptr));
+
+	dev = lbs_mesh_set_dev(priv, dev, p_rx_pd);
 
 	lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data,
 		 min_t(unsigned int, skb->len, 100));
 
 	if (skb->len < (ETH_HLEN + 8 + sizeof(struct rxpd))) {
 		lbs_deb_rx("rx err: frame received with bad length\n");
-		priv->stats.rx_length_errors++;
-		ret = 0;
-		goto done;
-	}
-
-	/*
-	 * Check rxpd status and update 802.3 stat,
-	 */
-	if (!(p_rx_pd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) {
-		lbs_deb_rx("rx err: frame received with bad status\n");
-		lbs_pr_alert("rxpd not ok\n");
-		priv->stats.rx_errors++;
-		ret = 0;
+		dev->stats.rx_length_errors++;
+		ret = -EINVAL;
+		dev_kfree_skb(skb);
 		goto done;
 	}
 
-	lbs_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
-	       skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
+	lbs_deb_rx("rx data: skb->len - pkt_ptr = %d-%zd = %zd\n",
+		skb->len, (size_t)le32_to_cpu(p_rx_pd->pkt_ptr),
+		skb->len - (size_t)le32_to_cpu(p_rx_pd->pkt_ptr));
 
 	lbs_deb_hex(LBS_DEB_RX, "RX Data: Dest", p_rx_pkt->eth803_hdr.dest_addr,
 		sizeof(p_rx_pkt->eth803_hdr.dest_addr));
@@ -225,7 +115,7 @@ int libertas_process_rxed_packet(wlan_private * priv, struct sk_buff *skb)
 		 *    before the snap_type.
 		 */
 		p_ethhdr = (struct ethhdr *)
-		    ((u8 *) & p_rx_pkt->eth803_hdr
+		    ((u8 *) &p_rx_pkt->eth803_hdr
 		     + sizeof(p_rx_pkt->eth803_hdr) + sizeof(p_rx_pkt->rfc1042_hdr)
 		     - sizeof(p_rx_pkt->eth803_hdr.dest_addr)
 		     - sizeof(p_rx_pkt->eth803_hdr.src_addr)
@@ -239,14 +129,14 @@ int libertas_process_rxed_packet(wlan_private * priv, struct sk_buff *skb)
 		/* Chop off the rxpd + the excess memory from the 802.2/llc/snap header
 		 *   that was removed
 		 */
-		hdrchop = (u8 *) p_ethhdr - (u8 *) p_rx_pkt;
+		hdrchop = (u8 *)p_ethhdr - (u8 *)p_rx_pd;
 	} else {
 		lbs_deb_hex(LBS_DEB_RX, "RX Data: LLC/SNAP",
-			(u8 *) & p_rx_pkt->rfc1042_hdr,
+			(u8 *) &p_rx_pkt->rfc1042_hdr,
 			sizeof(p_rx_pkt->rfc1042_hdr));
 
 		/* Chop off the rxpd */
-		hdrchop = (u8 *) & p_rx_pkt->eth803_hdr - (u8 *) p_rx_pkt;
+		hdrchop = (u8 *)&p_rx_pkt->eth803_hdr - (u8 *)p_rx_pd;
 	}
 
 	/* Chop off the leading header bytes so the skb points to the start of
@@ -254,33 +144,31 @@ int libertas_process_rxed_packet(wlan_private * priv, struct sk_buff *skb)
 	 */
 	skb_pull(skb, hdrchop);
 
-	/* Take the data rate from the rxpd structure
-	 * only if the rate is auto
-	 */
-	if (adapter->auto_rate)
-		adapter->cur_rate = libertas_fw_index_to_data_rate(p_rx_pd->rx_rate);
-
-	wlan_compute_rssi(priv, p_rx_pd);
+	priv->cur_rate = lbs_fw_index_to_data_rate(p_rx_pd->rx_rate);
 
 	lbs_deb_rx("rx data: size of actual packet %d\n", skb->len);
-	priv->stats.rx_bytes += skb->len;
-	priv->stats.rx_packets++;
+	dev->stats.rx_bytes += skb->len;
+	dev->stats.rx_packets++;
 
-	libertas_upload_rx_packet(priv, skb);
+	skb->protocol = eth_type_trans(skb, dev);
+	if (in_interrupt())
+		netif_rx(skb);
+	else
+		netif_rx_ni(skb);
 
 	ret = 0;
 done:
 	lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(libertas_process_rxed_packet);
+EXPORT_SYMBOL_GPL(lbs_process_rxed_packet);
 
 /**
- *  @brief This function converts Tx/Rx rates from the Marvell WLAN format
- *  (see Table 2 in Section 3.1) to IEEE80211_RADIOTAP_RATE units (500 Kb/s)
+ * convert_mv_rate_to_radiotap - converts Tx/Rx rates from Marvell WLAN format
+ * (see Table 2 in Section 3.1) to IEEE80211_RADIOTAP_RATE units (500 Kb/s)
  *
- *  @param rate    Input rate
- *  @return 	   Output Rate (0 if invalid)
+ * @rate:	Input rate
+ * returns:	Output Rate (0 if invalid)
  */
 static u8 convert_mv_rate_to_radiotap(u8 rate)
 {
@@ -311,23 +199,23 @@ static u8 convert_mv_rate_to_radiotap(u8 rate)
 	case 12:		/*  54 Mbps */
 		return 108;
 	}
-	lbs_pr_alert("Invalid Marvell WLAN rate %i\n", rate);
+	pr_alert("Invalid Marvell WLAN rate %i\n", rate);
 	return 0;
 }
 
 /**
- *  @brief This function processes a received 802.11 packet and forwards it
- *  to kernel/upper layer
+ * process_rxed_802_11_packet - processes a received 802.11 packet and forwards
+ * it to kernel/upper layer
  *
- *  @param priv    A pointer to wlan_private
- *  @param skb     A pointer to skb which includes the received packet
- *  @return 	   0 or -1
+ * @priv:	A pointer to &struct lbs_private
+ * @skb:	A pointer to skb which includes the received packet
+ * returns:	0 or -1
  */
-static int process_rxed_802_11_packet(wlan_private * priv, struct sk_buff *skb)
+static int process_rxed_802_11_packet(struct lbs_private *priv,
+	struct sk_buff *skb)
 {
-	wlan_adapter *adapter = priv->adapter;
 	int ret = 0;
-
+	struct net_device *dev = priv->dev;
 	struct rx80211packethdr *p_rx_pkt;
 	struct rxpd *prxpd;
 	struct rx_radiotap_hdr radiotap_hdr;
@@ -338,86 +226,57 @@ static int process_rxed_802_11_packet(wlan_private * priv, struct sk_buff *skb)
 	p_rx_pkt = (struct rx80211packethdr *) skb->data;
 	prxpd = &p_rx_pkt->rx_pd;
 
-	// lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data, min(skb->len, 100));
+	/* lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data, min(skb->len, 100)); */
 
 	if (skb->len < (ETH_HLEN + 8 + sizeof(struct rxpd))) {
-		lbs_deb_rx("rx err: frame received wit bad length\n");
-		priv->stats.rx_length_errors++;
-		ret = 0;
+		lbs_deb_rx("rx err: frame received with bad length\n");
+		dev->stats.rx_length_errors++;
+		ret = -EINVAL;
+		kfree_skb(skb);
 		goto done;
 	}
 
-	/*
-	 * Check rxpd status and update 802.3 stat,
-	 */
-	if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) {
-		//lbs_deb_rx("rx err: frame received with bad status\n");
-		priv->stats.rx_errors++;
-	}
-
 	lbs_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 	       skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 
 	/* create the exported radio header */
-	if(priv->adapter->monitormode == WLAN_MONITOR_OFF) {
-		/* no radio header */
-		/* chop the rxpd */
-		skb_pull(skb, sizeof(struct rxpd));
-	}
 
-	else {
-		/* radiotap header */
-		radiotap_hdr.hdr.it_version = 0;
-		/* XXX must check this value for pad */
-		radiotap_hdr.hdr.it_pad = 0;
-		radiotap_hdr.hdr.it_len = cpu_to_le16 (sizeof(struct rx_radiotap_hdr));
-		radiotap_hdr.hdr.it_present = cpu_to_le32 (RX_RADIOTAP_PRESENT);
-		/* unknown values */
-		radiotap_hdr.flags = 0;
-		radiotap_hdr.chan_freq = 0;
-		radiotap_hdr.chan_flags = 0;
-		radiotap_hdr.antenna = 0;
-		/* known values */
-		radiotap_hdr.rate = convert_mv_rate_to_radiotap(prxpd->rx_rate);
-		/* XXX must check no carryout */
-		radiotap_hdr.antsignal = prxpd->snr + prxpd->nf;
-		radiotap_hdr.rx_flags = 0;
-		if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
-			radiotap_hdr.rx_flags |= IEEE80211_RADIOTAP_F_RX_BADFCS;
-		//memset(radiotap_hdr.pad, 0x11, IEEE80211_RADIOTAP_HDRLEN - 18);
-
-		/* chop the rxpd */
-		skb_pull(skb, sizeof(struct rxpd));
-
-		/* add space for the new radio header */
-		if ((skb_headroom(skb) < sizeof(struct rx_radiotap_hdr)) &&
-		    pskb_expand_head(skb, sizeof(struct rx_radiotap_hdr), 0,
-				     GFP_ATOMIC)) {
-			lbs_pr_alert("%s: couldn't pskb_expand_head\n",
-			       __func__);
-		}
-
-		pradiotap_hdr =
-		    (struct rx_radiotap_hdr *)skb_push(skb,
-						     sizeof(struct
-							    rx_radiotap_hdr));
-		memcpy(pradiotap_hdr, &radiotap_hdr,
-		       sizeof(struct rx_radiotap_hdr));
+	/* radiotap header */
+	memset(&radiotap_hdr, 0, sizeof(radiotap_hdr));
+	/* XXX must check radiotap_hdr.hdr.it_pad for pad */
+	radiotap_hdr.hdr.it_len = cpu_to_le16 (sizeof(struct rx_radiotap_hdr));
+	radiotap_hdr.hdr.it_present = cpu_to_le32 (RX_RADIOTAP_PRESENT);
+	radiotap_hdr.rate = convert_mv_rate_to_radiotap(prxpd->rx_rate);
+	/* XXX must check no carryout */
+	radiotap_hdr.antsignal = prxpd->snr + prxpd->nf;
+
+	/* chop the rxpd */
+	skb_pull(skb, sizeof(struct rxpd));
+
+	/* add space for the new radio header */
+	if ((skb_headroom(skb) < sizeof(struct rx_radiotap_hdr)) &&
+	    pskb_expand_head(skb, sizeof(struct rx_radiotap_hdr), 0, GFP_ATOMIC)) {
+		netdev_alert(dev, "%s: couldn't pskb_expand_head\n", __func__);
+		ret = -ENOMEM;
+		kfree_skb(skb);
+		goto done;
 	}
 
-	/* Take the data rate from the rxpd structure
-	 * only if the rate is auto
-	 */
-	if (adapter->auto_rate)
-		adapter->cur_rate = libertas_fw_index_to_data_rate(prxpd->rx_rate);
+	pradiotap_hdr = (void *)skb_push(skb, sizeof(struct rx_radiotap_hdr));
+	memcpy(pradiotap_hdr, &radiotap_hdr, sizeof(struct rx_radiotap_hdr));
 
-	wlan_compute_rssi(priv, prxpd);
+	priv->cur_rate = lbs_fw_index_to_data_rate(prxpd->rx_rate);
 
 	lbs_deb_rx("rx data: size of actual packet %d\n", skb->len);
-	priv->stats.rx_bytes += skb->len;
-	priv->stats.rx_packets++;
+	dev->stats.rx_bytes += skb->len;
+	dev->stats.rx_packets++;
 
-	libertas_upload_rx_packet(priv, skb);
+	skb->protocol = eth_type_trans(skb, priv->dev);
+
+	if (in_interrupt())
+		netif_rx(skb);
+	else
+		netif_rx_ni(skb);
 
 	ret = 0;