static int ath5k_rx_start(struct ath5k_softc *sc);
static void ath5k_rx_stop(struct ath5k_softc *sc);
static unsigned int ath5k_rx_decrypted(struct ath5k_softc *sc,
- struct ath5k_desc *ds,
struct sk_buff *skb,
struct ath5k_rx_status *rs);
static void ath5k_tasklet_rx(unsigned long data);
}
static unsigned int
-ath5k_rx_decrypted(struct ath5k_softc *sc, struct ath5k_desc *ds,
- struct sk_buff *skb, struct ath5k_rx_status *rs)
+ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
+ struct ath5k_rx_status *rs)
{
struct ath5k_hw *ah = sc->ah;
struct ath_common *common = ath5k_hw_common(ah);
}
static void
-ath5k_tasklet_rx(unsigned long data)
+ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
+ struct ath5k_rx_status *rs)
{
struct ieee80211_rx_status *rxs;
+
+ /* The MAC header is padded to have 32-bit boundary if the
+ * packet payload is non-zero. The general calculation for
+ * padsize would take into account odd header lengths:
+ * padsize = (4 - hdrlen % 4) % 4; However, since only
+ * even-length headers are used, padding can only be 0 or 2
+ * bytes and we can optimize this a bit. In addition, we must
+ * not try to remove padding from short control frames that do
+ * not have payload. */
+ ath5k_remove_padding(skb);
+
+ rxs = IEEE80211_SKB_RXCB(skb);
+
+ rxs->flag = 0;
+ if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
+ rxs->flag |= RX_FLAG_MMIC_ERROR;
+
+ /*
+ * always extend the mac timestamp, since this information is
+ * also needed for proper IBSS merging.
+ *
+ * XXX: it might be too late to do it here, since rs_tstamp is
+ * 15bit only. that means TSF extension has to be done within
+ * 32768usec (about 32ms). it might be necessary to move this to
+ * the interrupt handler, like it is done in madwifi.
+ *
+ * Unfortunately we don't know when the hardware takes the rx
+ * timestamp (beginning of phy frame, data frame, end of rx?).
+ * The only thing we know is that it is hardware specific...
+ * On AR5213 it seems the rx timestamp is at the end of the
+ * frame, but i'm not sure.
+ *
+ * NOTE: mac80211 defines mactime at the beginning of the first
+ * data symbol. Since we don't have any time references it's
+ * impossible to comply to that. This affects IBSS merge only
+ * right now, so it's not too bad...
+ */
+ rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
+ rxs->flag |= RX_FLAG_TSFT;
+
+ rxs->freq = sc->curchan->center_freq;
+ rxs->band = sc->curband->band;
+
+ rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
+
+ rxs->antenna = rs->rs_antenna;
+
+ if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
+ sc->stats.antenna_rx[rs->rs_antenna]++;
+ else
+ sc->stats.antenna_rx[0]++; /* invalid */
+
+ rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
+ rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
+
+ if (rxs->rate_idx >= 0 && rs->rs_rate ==
+ sc->curband->bitrates[rxs->rate_idx].hw_value_short)
+ rxs->flag |= RX_FLAG_SHORTPRE;
+
+ ath5k_debug_dump_skb(sc, skb, "RX ", 0);
+
+ ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
+
+ /* check beacons in IBSS mode */
+ if (sc->opmode == NL80211_IFTYPE_ADHOC)
+ ath5k_check_ibss_tsf(sc, skb, rxs);
+
+ ieee80211_rx(sc->hw, skb);
+}
+
+static void
+ath5k_tasklet_rx(unsigned long data)
+{
struct ath5k_rx_status rs = {};
struct sk_buff *skb, *next_skb;
dma_addr_t next_skb_addr;
struct ath5k_buf *bf;
struct ath5k_desc *ds;
int ret;
- int rx_flag;
spin_lock(&sc->rxbuflock);
if (list_empty(&sc->rxbuf)) {
goto unlock;
}
do {
- rx_flag = 0;
-
bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
BUG_ON(bf->skb == NULL);
skb = bf->skb;
goto accept;
}
if (rs.rs_status & AR5K_RXERR_MIC) {
- rx_flag |= RX_FLAG_MMIC_ERROR;
sc->stats.rxerr_mic++;
goto accept;
}
PCI_DMA_FROMDEVICE);
skb_put(skb, rs.rs_datalen);
- /* The MAC header is padded to have 32-bit boundary if the
- * packet payload is non-zero. The general calculation for
- * padsize would take into account odd header lengths:
- * padsize = (4 - hdrlen % 4) % 4; However, since only
- * even-length headers are used, padding can only be 0 or 2
- * bytes and we can optimize this a bit. In addition, we must
- * not try to remove padding from short control frames that do
- * not have payload. */
- ath5k_remove_padding(skb);
-
- rxs = IEEE80211_SKB_RXCB(skb);
-
- /*
- * always extend the mac timestamp, since this information is
- * also needed for proper IBSS merging.
- *
- * XXX: it might be too late to do it here, since rs_tstamp is
- * 15bit only. that means TSF extension has to be done within
- * 32768usec (about 32ms). it might be necessary to move this to
- * the interrupt handler, like it is done in madwifi.
- *
- * Unfortunately we don't know when the hardware takes the rx
- * timestamp (beginning of phy frame, data frame, end of rx?).
- * The only thing we know is that it is hardware specific...
- * On AR5213 it seems the rx timestamp is at the end of the
- * frame, but i'm not sure.
- *
- * NOTE: mac80211 defines mactime at the beginning of the first
- * data symbol. Since we don't have any time references it's
- * impossible to comply to that. This affects IBSS merge only
- * right now, so it's not too bad...
- */
- rxs->mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp);
- rxs->flag = rx_flag | RX_FLAG_TSFT;
-
- rxs->freq = sc->curchan->center_freq;
- rxs->band = sc->curband->band;
-
- rxs->signal = sc->ah->ah_noise_floor + rs.rs_rssi;
-
- rxs->antenna = rs.rs_antenna;
-
- if (rs.rs_antenna > 0 && rs.rs_antenna < 5)
- sc->stats.antenna_rx[rs.rs_antenna]++;
- else
- sc->stats.antenna_rx[0]++; /* invalid */
-
- rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);
- rxs->flag |= ath5k_rx_decrypted(sc, ds, skb, &rs);
-
- if (rxs->rate_idx >= 0 && rs.rs_rate ==
- sc->curband->bitrates[rxs->rate_idx].hw_value_short)
- rxs->flag |= RX_FLAG_SHORTPRE;
-
- ath5k_debug_dump_skb(sc, skb, "RX ", 0);
-
- ath5k_update_beacon_rssi(sc, skb, rs.rs_rssi);
-
- /* check beacons in IBSS mode */
- if (sc->opmode == NL80211_IFTYPE_ADHOC)
- ath5k_check_ibss_tsf(sc, skb, rxs);
-
- ieee80211_rx(sc->hw, skb);
+ ath5k_receive_frame(sc, skb, &rs);
bf->skb = next_skb;
bf->skbaddr = next_skb_addr;
projects / mirror_ubuntu-kernels.git / commitdiff