return (tsf & ~0x7fff) | rstamp;
}
-static struct sk_buff *ath_rxbuf_alloc(struct ath_softc *sc, u32 len, gfp_t gfp_mask)
-{
- struct sk_buff *skb;
- u32 off;
-
- /*
- * Cache-line-align. This is important (for the
- * 5210 at least) as not doing so causes bogus data
- * in rx'd frames.
- */
-
- /* Note: the kernel can allocate a value greater than
- * what we ask it to give us. We really only need 4 KB as that
- * is this hardware supports and in fact we need at least 3849
- * as that is the MAX AMSDU size this hardware supports.
- * Unfortunately this means we may get 8 KB here from the
- * kernel... and that is actually what is observed on some
- * systems :( */
- skb = __dev_alloc_skb(len + sc->cachelsz - 1, gfp_mask);
- if (skb != NULL) {
- off = ((unsigned long) skb->data) % sc->cachelsz;
- if (off != 0)
- skb_reserve(skb, sc->cachelsz - off);
- } else {
- DPRINTF(sc, ATH_DBG_FATAL,
- "skbuff alloc of size %u failed\n", len);
- return NULL;
- }
-
- return skb;
-}
-
/*
* For Decrypt or Demic errors, we only mark packet status here and always push
* up the frame up to let mac80211 handle the actual error case, be it no
u8 ratecode;
__le16 fc;
struct ieee80211_hw *hw;
+ struct ieee80211_sta *sta;
+ struct ath_node *an;
+ int last_rssi = ATH_RSSI_DUMMY_MARKER;
+
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
}
}
+ rcu_read_lock();
+ sta = ieee80211_find_sta(sc->hw, hdr->addr2);
+ if (sta) {
+ an = (struct ath_node *) sta->drv_priv;
+ if (ds->ds_rxstat.rs_rssi != ATH9K_RSSI_BAD &&
+ !ds->ds_rxstat.rs_moreaggr)
+ ATH_RSSI_LPF(an->last_rssi, ds->ds_rxstat.rs_rssi);
+ last_rssi = an->last_rssi;
+ }
+ rcu_read_unlock();
+
+ if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
+ ds->ds_rxstat.rs_rssi = ATH_EP_RND(last_rssi,
+ ATH_RSSI_EP_MULTIPLIER);
+ if (ds->ds_rxstat.rs_rssi < 0)
+ ds->ds_rxstat.rs_rssi = 0;
+ else if (ds->ds_rxstat.rs_rssi > 127)
+ ds->ds_rxstat.rs_rssi = 127;
+
+ /* Update Beacon RSSI, this is used by ANI. */
+ if (ieee80211_is_beacon(fc))
+ sc->nodestats.ns_avgbrssi = ds->ds_rxstat.rs_rssi;
+
rx_status->mactime = ath_extend_tsf(sc, ds->ds_rxstat.rs_tstamp);
rx_status->band = hw->conf.channel->band;
rx_status->freq = hw->conf.channel->center_freq;
rx_status->noise = sc->ani.noise_floor;
- rx_status->signal = rx_status->noise + ds->ds_rxstat.rs_rssi;
+ rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + ds->ds_rxstat.rs_rssi;
rx_status->antenna = ds->ds_rxstat.rs_antenna;
- /* at 45 you will be able to use MCS 15 reliably. A more elaborate
- * scheme can be used here but it requires tables of SNR/throughput for
- * each possible mode used. */
- rx_status->qual = ds->ds_rxstat.rs_rssi * 100 / 45;
+ /*
+ * Theory for reporting quality:
+ *
+ * At a hardware RSSI of 45 you will be able to use MCS 7 reliably.
+ * At a hardware RSSI of 45 you will be able to use MCS 15 reliably.
+ * At a hardware RSSI of 35 you should be able use 54 Mbps reliably.
+ *
+ * MCS 7 is the highets MCS index usable by a 1-stream device.
+ * MCS 15 is the highest MCS index usable by a 2-stream device.
+ *
+ * All ath9k devices are either 1-stream or 2-stream.
+ *
+ * How many bars you see is derived from the qual reporting.
+ *
+ * A more elaborate scheme can be used here but it requires tables
+ * of SNR/throughput for each possible mode used. For the MCS table
+ * you can refer to the wireless wiki:
+ *
+ * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
+ *
+ */
+ if (conf_is_ht(&hw->conf))
+ rx_status->qual = ds->ds_rxstat.rs_rssi * 100 / 45;
+ else
+ rx_status->qual = ds->ds_rxstat.rs_rssi * 100 / 35;
/* rssi can be more than 45 though, anything above that
* should be considered at 100% */
spin_lock_init(&sc->rx.rxbuflock);
sc->rx.bufsize = roundup(IEEE80211_MAX_MPDU_LEN,
- min(sc->cachelsz, (u16)64));
+ min(sc->common.cachelsz, (u16)64));
DPRINTF(sc, ATH_DBG_CONFIG, "cachelsz %u rxbufsize %u\n",
- sc->cachelsz, sc->rx.bufsize);
+ sc->common.cachelsz, sc->rx.bufsize);
/* Initialize rx descriptors */
}
list_for_each_entry(bf, &sc->rx.rxbuf, list) {
- skb = ath_rxbuf_alloc(sc, sc->rx.bufsize, GFP_KERNEL);
+ skb = ath_rxbuf_alloc(&sc->common, sc->rx.bufsize, GFP_KERNEL);
if (skb == NULL) {
error = -ENOMEM;
goto err;
else
rfilt |= ATH9K_RX_FILTER_BEACON;
- /* If in HOSTAP mode, want to enable reception of PSPOLL frames */
- if (sc->sc_ah->opmode == NL80211_IFTYPE_AP)
+ if (sc->rx.rxfilter & FIF_PSPOLL)
rfilt |= ATH9K_RX_FILTER_PSPOLL;
if (sc->sec_wiphy) {
return false;
}
-static void ath_rx_ps_back_to_sleep(struct ath_softc *sc)
-{
- sc->sc_flags &= ~(SC_OP_WAIT_FOR_BEACON | SC_OP_WAIT_FOR_CAB);
-}
-
static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt;
if (memcmp(sc->curbssid, mgmt->bssid, ETH_ALEN) != 0)
return; /* not from our current AP */
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON;
+
if (sc->sc_flags & SC_OP_BEACON_SYNC) {
sc->sc_flags &= ~SC_OP_BEACON_SYNC;
DPRINTF(sc, ATH_DBG_PS, "Reconfigure Beacon timers based on "
ath_beacon_config(sc, NULL);
}
- if (!(sc->hw->conf.flags & IEEE80211_CONF_PS)) {
- /* We are not in PS mode anymore; remain awake */
- DPRINTF(sc, ATH_DBG_PS, "Not in PS mode anymore, remain "
- "awake\n");
- sc->sc_flags &= ~(SC_OP_WAIT_FOR_BEACON | SC_OP_WAIT_FOR_CAB);
- return;
- }
-
if (ath_beacon_dtim_pending_cab(skb)) {
/*
* Remain awake waiting for buffered broadcast/multicast
* fails to send a frame indicating that all CAB frames have
* been delivered.
*/
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_CAB;
DPRINTF(sc, ATH_DBG_PS, "PS wait for CAB frames timed out\n");
}
-
- /* No more broadcast/multicast frames to be received at this point. */
- ath_rx_ps_back_to_sleep(sc);
}
static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb)
ieee80211_is_action(hdr->frame_control)) &&
is_multicast_ether_addr(hdr->addr1) &&
!ieee80211_has_moredata(hdr->frame_control)) {
- DPRINTF(sc, ATH_DBG_PS, "All PS CAB frames received, back to "
- "sleep\n");
/*
* No more broadcast/multicast frames to be received at this
* point.
*/
- ath_rx_ps_back_to_sleep(sc);
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_CAB;
+ DPRINTF(sc, ATH_DBG_PS, "All PS CAB frames received, back to "
+ "sleep\n");
} else if ((sc->sc_flags & SC_OP_WAIT_FOR_PSPOLL_DATA) &&
!is_multicast_ether_addr(hdr->addr1) &&
!ieee80211_has_morefrags(hdr->frame_control)) {
if (aphy == NULL)
continue;
nskb = skb_copy(skb, GFP_ATOMIC);
- if (nskb)
- __ieee80211_rx(aphy->hw, nskb, rx_status);
+ if (nskb) {
+ memcpy(IEEE80211_SKB_RXCB(nskb), rx_status,
+ sizeof(*rx_status));
+ ieee80211_rx(aphy->hw, nskb);
+ }
}
- __ieee80211_rx(sc->hw, skb, rx_status);
+ memcpy(IEEE80211_SKB_RXCB(skb), rx_status, sizeof(*rx_status));
+ ieee80211_rx(sc->hw, skb);
} else {
/* Deliver unicast frames based on receiver address */
- __ieee80211_rx(ath_get_virt_hw(sc, hdr), skb, rx_status);
+ memcpy(IEEE80211_SKB_RXCB(skb), rx_status, sizeof(*rx_status));
+ ieee80211_rx(ath_get_virt_hw(sc, hdr), skb);
}
}
/* Ensure we always have an skb to requeue once we are done
* processing the current buffer's skb */
- requeue_skb = ath_rxbuf_alloc(sc, sc->rx.bufsize, GFP_ATOMIC);
+ requeue_skb = ath_rxbuf_alloc(&sc->common, sc->rx.bufsize, GFP_ATOMIC);
/* If there is no memory we ignore the current RX'd frame,
* tell hardware it can give us a new frame using the old
DMA_FROM_DEVICE);
skb_put(skb, ds->ds_rxstat.rs_datalen);
- skb->protocol = cpu_to_be16(ETH_P_CONTROL);
/* see if any padding is done by the hw and remove it */
hdr = (struct ieee80211_hdr *)skb->data;
git.openpandora.org / pandora-kernel.git / blobdiff