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path: root/drivers/net/wireless/libertas/rx.c
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Diffstat (limited to 'drivers/net/wireless/libertas/rx.c')
-rw-r--r--drivers/net/wireless/libertas/rx.c121
1 files changed, 11 insertions, 110 deletions
diff --git a/drivers/net/wireless/libertas/rx.c b/drivers/net/wireless/libertas/rx.c
index 1c63f8ce7349..a4d0bca9ef2c 100644
--- a/drivers/net/wireless/libertas/rx.c
+++ b/drivers/net/wireless/libertas/rx.c
@@ -4,12 +4,13 @@
4#include <linux/etherdevice.h> 4#include <linux/etherdevice.h>
5#include <linux/slab.h> 5#include <linux/slab.h>
6#include <linux/types.h> 6#include <linux/types.h>
7#include <net/cfg80211.h>
7 8
9#include "defs.h"
8#include "host.h" 10#include "host.h"
9#include "radiotap.h" 11#include "radiotap.h"
10#include "decl.h" 12#include "decl.h"
11#include "dev.h" 13#include "dev.h"
12#include "wext.h"
13 14
14struct eth803hdr { 15struct eth803hdr {
15 u8 dest_addr[6]; 16 u8 dest_addr[6];
@@ -39,98 +40,6 @@ static int process_rxed_802_11_packet(struct lbs_private *priv,
39 struct sk_buff *skb); 40 struct sk_buff *skb);
40 41
41/** 42/**
42 * @brief This function computes the avgSNR .
43 *
44 * @param priv A pointer to struct lbs_private structure
45 * @return avgSNR
46 */
47static u8 lbs_getavgsnr(struct lbs_private *priv)
48{
49 u8 i;
50 u16 temp = 0;
51 if (priv->numSNRNF == 0)
52 return 0;
53 for (i = 0; i < priv->numSNRNF; i++)
54 temp += priv->rawSNR[i];
55 return (u8) (temp / priv->numSNRNF);
56
57}
58
59/**
60 * @brief This function computes the AvgNF
61 *
62 * @param priv A pointer to struct lbs_private structure
63 * @return AvgNF
64 */
65static u8 lbs_getavgnf(struct lbs_private *priv)
66{
67 u8 i;
68 u16 temp = 0;
69 if (priv->numSNRNF == 0)
70 return 0;
71 for (i = 0; i < priv->numSNRNF; i++)
72 temp += priv->rawNF[i];
73 return (u8) (temp / priv->numSNRNF);
74
75}
76
77/**
78 * @brief This function save the raw SNR/NF to our internel buffer
79 *
80 * @param priv A pointer to struct lbs_private structure
81 * @param prxpd A pointer to rxpd structure of received packet
82 * @return n/a
83 */
84static void lbs_save_rawSNRNF(struct lbs_private *priv, struct rxpd *p_rx_pd)
85{
86 if (priv->numSNRNF < DEFAULT_DATA_AVG_FACTOR)
87 priv->numSNRNF++;
88 priv->rawSNR[priv->nextSNRNF] = p_rx_pd->snr;
89 priv->rawNF[priv->nextSNRNF] = p_rx_pd->nf;
90 priv->nextSNRNF++;
91 if (priv->nextSNRNF >= DEFAULT_DATA_AVG_FACTOR)
92 priv->nextSNRNF = 0;
93}
94
95/**
96 * @brief This function computes the RSSI in received packet.
97 *
98 * @param priv A pointer to struct lbs_private structure
99 * @param prxpd A pointer to rxpd structure of received packet
100 * @return n/a
101 */
102static void lbs_compute_rssi(struct lbs_private *priv, struct rxpd *p_rx_pd)
103{
104
105 lbs_deb_enter(LBS_DEB_RX);
106
107 lbs_deb_rx("rxpd: SNR %d, NF %d\n", p_rx_pd->snr, p_rx_pd->nf);
108 lbs_deb_rx("before computing SNR: SNR-avg = %d, NF-avg = %d\n",
109 priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE,
110 priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE);
111
112 priv->SNR[TYPE_RXPD][TYPE_NOAVG] = p_rx_pd->snr;
113 priv->NF[TYPE_RXPD][TYPE_NOAVG] = p_rx_pd->nf;
114 lbs_save_rawSNRNF(priv, p_rx_pd);
115
116 priv->SNR[TYPE_RXPD][TYPE_AVG] = lbs_getavgsnr(priv) * AVG_SCALE;
117 priv->NF[TYPE_RXPD][TYPE_AVG] = lbs_getavgnf(priv) * AVG_SCALE;
118 lbs_deb_rx("after computing SNR: SNR-avg = %d, NF-avg = %d\n",
119 priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE,
120 priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE);
121
122 priv->RSSI[TYPE_RXPD][TYPE_NOAVG] =
123 CAL_RSSI(priv->SNR[TYPE_RXPD][TYPE_NOAVG],
124 priv->NF[TYPE_RXPD][TYPE_NOAVG]);
125
126 priv->RSSI[TYPE_RXPD][TYPE_AVG] =
127 CAL_RSSI(priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE,
128 priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE);
129
130 lbs_deb_leave(LBS_DEB_RX);
131}
132
133/**
134 * @brief This function processes received packet and forwards it 43 * @brief This function processes received packet and forwards it
135 * to kernel/upper layer 44 * to kernel/upper layer
136 * 45 *
@@ -154,7 +63,7 @@ int lbs_process_rxed_packet(struct lbs_private *priv, struct sk_buff *skb)
154 63
155 skb->ip_summed = CHECKSUM_NONE; 64 skb->ip_summed = CHECKSUM_NONE;
156 65
157 if (priv->monitormode) 66 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
158 return process_rxed_802_11_packet(priv, skb); 67 return process_rxed_802_11_packet(priv, skb);
159 68
160 p_rx_pd = (struct rxpd *) skb->data; 69 p_rx_pd = (struct rxpd *) skb->data;
@@ -225,13 +134,7 @@ int lbs_process_rxed_packet(struct lbs_private *priv, struct sk_buff *skb)
225 */ 134 */
226 skb_pull(skb, hdrchop); 135 skb_pull(skb, hdrchop);
227 136
228 /* Take the data rate from the rxpd structure 137 priv->cur_rate = lbs_fw_index_to_data_rate(p_rx_pd->rx_rate);
229 * only if the rate is auto
230 */
231 if (priv->enablehwauto)
232 priv->cur_rate = lbs_fw_index_to_data_rate(p_rx_pd->rx_rate);
233
234 lbs_compute_rssi(priv, p_rx_pd);
235 138
236 lbs_deb_rx("rx data: size of actual packet %d\n", skb->len); 139 lbs_deb_rx("rx data: size of actual packet %d\n", skb->len);
237 dev->stats.rx_bytes += skb->len; 140 dev->stats.rx_bytes += skb->len;
@@ -352,20 +255,18 @@ static int process_rxed_802_11_packet(struct lbs_private *priv,
352 pradiotap_hdr = (void *)skb_push(skb, sizeof(struct rx_radiotap_hdr)); 255 pradiotap_hdr = (void *)skb_push(skb, sizeof(struct rx_radiotap_hdr));
353 memcpy(pradiotap_hdr, &radiotap_hdr, sizeof(struct rx_radiotap_hdr)); 256 memcpy(pradiotap_hdr, &radiotap_hdr, sizeof(struct rx_radiotap_hdr));
354 257
355 /* Take the data rate from the rxpd structure 258 priv->cur_rate = lbs_fw_index_to_data_rate(prxpd->rx_rate);
356 * only if the rate is auto
357 */
358 if (priv->enablehwauto)
359 priv->cur_rate = lbs_fw_index_to_data_rate(prxpd->rx_rate);
360
361 lbs_compute_rssi(priv, prxpd);
362 259
363 lbs_deb_rx("rx data: size of actual packet %d\n", skb->len); 260 lbs_deb_rx("rx data: size of actual packet %d\n", skb->len);
364 dev->stats.rx_bytes += skb->len; 261 dev->stats.rx_bytes += skb->len;
365 dev->stats.rx_packets++; 262 dev->stats.rx_packets++;
366 263
367 skb->protocol = eth_type_trans(skb, priv->rtap_net_dev); 264 skb->protocol = eth_type_trans(skb, priv->dev);
368 netif_rx(skb); 265
266 if (in_interrupt())
267 netif_rx(skb);
268 else
269 netif_rx_ni(skb);
369 270
370 ret = 0; 271 ret = 0;
371 272