1 files changed, 196 insertions, 35 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 82d282730b7..63e832cdba7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -183,6 +183,16 @@ void iwl3945_disable_events(struct iwl3945_priv *priv)
 
 }
 
+static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
+{
+	int idx;
+
+	for (idx = 0; idx < IWL_RATE_COUNT; idx++)
+		if (iwl3945_rates[idx].plcp == plcp)
+			return idx;
+	return -1;
+}
+
 /**
  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  * @priv: eeprom and antenna fields are used to determine antenna flags
@@ -238,6 +248,156 @@ void iwl3945_hw_rx_statistics(struct iwl3945_priv *priv, struct iwl3945_rx_mem_b
 	priv->last_statistics_time = jiffies;
 }
 
+/******************************************************************************
+ *
+ * Misc. internal state and helper functions
+ *
+ ******************************************************************************/
+#ifdef CONFIG_IWL3945_DEBUG
+
+/**
+ * iwl3945_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.
+ */
+static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
+		      struct iwl3945_rx_packet *pkt,
+		      struct ieee80211_hdr *header, int group100)
+{
+	u32 to_us;
+	u32 print_summary = 0;
+	u32 print_dump = 0;	/* set to 1 to dump all frames' contents */
+	u32 hundred = 0;
+	u32 dataframe = 0;
+	u16 fc;
+	u16 seq_ctl;
+	u16 channel;
+	u16 phy_flags;
+	u16 length;
+	u16 status;
+	u16 bcn_tmr;
+	u32 tsf_low;
+	u64 tsf;
+	u8 rssi;
+	u8 agc;
+	u16 sig_avg;
+	u16 noise_diff;
+	struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
+	struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
+	struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
+	u8 *data = IWL_RX_DATA(pkt);
+
+	/* MAC header */
+	fc = le16_to_cpu(header->frame_control);
+	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);
+	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);
+
+	/* 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);
+
+	to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
+
+	/* if data frame is to us and all is good,
+	 *   (optionally) print summary for only 1 out of every 100 */
+	if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
+	    (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
+		dataframe = 1;
+		if (!group100)
+			print_summary = 1;	/* print each frame */
+		else if (priv->framecnt_to_us < 100) {
+			priv->framecnt_to_us++;
+			print_summary = 0;
+		} else {
+			priv->framecnt_to_us = 0;
+			print_summary = 1;
+			hundred = 1;
+		}
+	} else {
+		/* print summary for all other frames */
+		print_summary = 1;
+	}
+
+	if (print_summary) {
+		char *title;
+		u32 rate;
+
+		if (hundred)
+			title = "100Frames";
+		else if (fc & IEEE80211_FCTL_RETRY)
+			title = "Retry";
+		else if (ieee80211_is_assoc_response(fc))
+			title = "AscRsp";
+		else if (ieee80211_is_reassoc_response(fc))
+			title = "RasRsp";
+		else if (ieee80211_is_probe_response(fc)) {
+			title = "PrbRsp";
+			print_dump = 1;	/* dump frame contents */
+		} else if (ieee80211_is_beacon(fc)) {
+			title = "Beacon";
+			print_dump = 1;	/* dump frame contents */
+		} else if (ieee80211_is_atim(fc))
+			title = "ATIM";
+		else if (ieee80211_is_auth(fc))
+			title = "Auth";
+		else if (ieee80211_is_deauth(fc))
+			title = "DeAuth";
+		else if (ieee80211_is_disassoc(fc))
+			title = "DisAssoc";
+		else
+			title = "Frame";
+
+		rate = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
+		if (rate == -1)
+			rate = 0;
+		else
+			rate = iwl3945_rates[rate].ieee / 2;
+
+		/* print frame summary.
+		 * MAC addresses show just the last byte (for brevity),
+		 *    but you can hack it to show more, if you'd like to. */
+		if (dataframe)
+			IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
+				     "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
+				     title, fc, header->addr1[5],
+				     length, rssi, channel, rate);
+		else {
+			/* src/dst addresses assume managed mode */
+			IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
+				     "src=0x%02x, rssi=%u, tim=%lu usec, "
+				     "phy=0x%02x, chnl=%d\n",
+				     title, fc, header->addr1[5],
+				     header->addr3[5], rssi,
+				     tsf_low - priv->scan_start_tsf,
+				     phy_flags, channel);
+		}
+	}
+	if (print_dump)
+		iwl3945_print_hex_dump(IWL_DL_RX, data, length);
+}
+#else
+static inline void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
+		      struct iwl3945_rx_packet *pkt,
+		      struct ieee80211_hdr *header, int group100)
+{
+}
+#endif
+
+
 static void iwl3945_add_radiotap(struct iwl3945_priv *priv,
 				 struct sk_buff *skb,
 				 struct iwl3945_rx_frame_hdr *rx_hdr,
@@ -376,24 +536,28 @@ static void iwl3945_handle_data_packet(struct iwl3945_priv *priv, int is_data,
 static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 				struct iwl3945_rx_mem_buffer *rxb)
 {
+	struct ieee80211_hdr *header;
+	struct ieee80211_rx_status rx_status;
 	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 	struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 	struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 	struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
-	struct ieee80211_hdr *header;
+	int snr;
 	u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 	u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
-	struct ieee80211_rx_status stats = {
-		.mactime = le64_to_cpu(rx_end->timestamp),
-		.freq = ieee80211chan2mhz(le16_to_cpu(rx_hdr->channel)),
-		.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
-		IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ,
-		.antenna = 0,
-		.rate_idx = iwl3945_rate_index_from_plcp(rx_hdr->rate),
-		.flag = 0,
-	};
 	u8 network_packet;
-	int snr;
+
+	rx_status.antenna = 0;
+	rx_status.flag = 0;
+	rx_status.mactime = le64_to_cpu(rx_end->timestamp);
+	rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_hdr->channel));
+	rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
+				IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
+
+	rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
+
+	if (rx_status.band == IEEE80211_BAND_5GHZ)
+		rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
 
 	if ((unlikely(rx_stats->phy_count > 20))) {
 		IWL_DEBUG_DROP
@@ -409,12 +573,12 @@ static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 	}
 
 	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
-		iwl3945_handle_data_packet(priv, 1, rxb, &stats);
+		iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
 		return;
 	}
 
 	/* Convert 3945's rssi indicator to dBm */
-	stats.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
+	rx_status.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
 
 	/* Set default noise value to -127 */
 	if (priv->last_rx_noise == 0)
@@ -430,50 +594,47 @@ static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 	 *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 	 * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 	 *   to obtain noise level in dBm.
-	 * Calculate stats.signal (quality indicator in %) based on SNR. */
+	 * Calculate rx_status.signal (quality indicator in %) based on SNR. */
 	if (rx_stats_noise_diff) {
 		snr = rx_stats_sig_avg / rx_stats_noise_diff;
-		stats.noise = stats.ssi - iwl3945_calc_db_from_ratio(snr);
-		stats.signal = iwl3945_calc_sig_qual(stats.ssi, stats.noise);
+		rx_status.noise = rx_status.ssi -
+					iwl3945_calc_db_from_ratio(snr);
+		rx_status.signal = iwl3945_calc_sig_qual(rx_status.ssi,
+							 rx_status.noise);
 
 	/* If noise info not available, calculate signal quality indicator (%)
 	 *   using just the dBm signal level. */
 	} else {
-		stats.noise = priv->last_rx_noise;
-		stats.signal = iwl3945_calc_sig_qual(stats.ssi, 0);
+		rx_status.noise = priv->last_rx_noise;
+		rx_status.signal = iwl3945_calc_sig_qual(rx_status.ssi, 0);
 	}
 
 
 	IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
-			stats.ssi, stats.noise, stats.signal,
+			rx_status.ssi, rx_status.noise, rx_status.signal,
 			rx_stats_sig_avg, rx_stats_noise_diff);
 
-	/* can be covered by iwl3945_report_frame() in most cases */
-/*      IWL_DEBUG_RX("RX status: 0x%08X\n", rx_end->status); */
-
 	header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 
 	network_packet = iwl3945_is_network_packet(priv, header);
 
-#ifdef CONFIG_IWL3945_DEBUG
-	if (iwl3945_debug_level & IWL_DL_STATS && net_ratelimit())
-		IWL_DEBUG_STATS
-		    ("[%c] %d RSSI: %d Signal: %u, Noise: %u, Rate: %u\n",
-		     network_packet ? '*' : ' ',
-		     le16_to_cpu(rx_hdr->channel),
-		     stats.ssi, stats.ssi,
-		     stats.ssi, stats.rate_idx);
+	IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
+			      network_packet ? '*' : ' ',
+			      le16_to_cpu(rx_hdr->channel),
+			      rx_status.ssi, rx_status.ssi,
+			      rx_status.ssi, rx_status.rate_idx);
 
+#ifdef CONFIG_IWL3945_DEBUG
 	if (iwl3945_debug_level & (IWL_DL_RX))
 		/* Set "1" to report good data frames in groups of 100 */
-		iwl3945_report_frame(priv, pkt, header, 1);
+		iwl3945_dbg_report_frame(priv, pkt, header, 1);
 #endif
 
 	if (network_packet) {
 		priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 		priv->last_tsf = le64_to_cpu(rx_end->timestamp);
-		priv->last_rx_rssi = stats.ssi;
-		priv->last_rx_noise = stats.noise;
+		priv->last_rx_rssi = rx_status.ssi;
+		priv->last_rx_noise = rx_status.noise;
 	}
 
 	switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
@@ -560,7 +721,7 @@ static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 			}
 		}
 
-		iwl3945_handle_data_packet(priv, 0, rxb, &stats);
+		iwl3945_handle_data_packet(priv, 0, rxb, &rx_status);
 		break;
 
 	case IEEE80211_FTYPE_CTL:
@@ -577,7 +738,7 @@ static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 				       print_mac(mac2, header->addr2),
 				       print_mac(mac3, header->addr3));
 		else
-			iwl3945_handle_data_packet(priv, 1, rxb, &stats);
+			iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
 		break;
 	}
 	}