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path: root/drivers/net/wireless/ath9k/beacon.c
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Diffstat (limited to 'drivers/net/wireless/ath9k/beacon.c')
-rw-r--r--drivers/net/wireless/ath9k/beacon.c145
1 files changed, 66 insertions, 79 deletions
diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c
index c43fd5861163..eedb465d25d3 100644
--- a/drivers/net/wireless/ath9k/beacon.c
+++ b/drivers/net/wireless/ath9k/beacon.c
@@ -16,7 +16,6 @@
/* Implementation of beacon processing. */
-#include <asm/unaligned.h>
#include "core.h"
/*
@@ -26,7 +25,6 @@
* the operating mode of the station (AP or AdHoc). Parameters are AIFS
* settings and channel width min/max
*/
-
static int ath_beaconq_config(struct ath_softc *sc)
{
struct ath_hal *ah = sc->sc_ah;
@@ -63,19 +61,18 @@ static int ath_beaconq_config(struct ath_softc *sc)
* up all required antenna switch parameters, rate codes, and channel flags.
* Beacons are always sent out at the lowest rate, and are not retried.
*/
-
static void ath_beacon_setup(struct ath_softc *sc,
- struct ath_vap *avp, struct ath_buf *bf)
+ struct ath_vap *avp, struct ath_buf *bf)
{
struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
struct ath_hal *ah = sc->sc_ah;
struct ath_desc *ds;
- int flags, antenna;
+ struct ath9k_11n_rate_series series[4];
const struct ath9k_rate_table *rt;
+ int flags, antenna;
u8 rix, rate;
int ctsrate = 0;
int ctsduration = 0;
- struct ath9k_11n_rate_series series[4];
DPRINTF(sc, ATH_DBG_BEACON, "%s: m %p len %u\n",
__func__, skb, skb->len);
@@ -115,20 +112,21 @@ static void ath_beacon_setup(struct ath_softc *sc,
rate |= rt->info[rix].shortPreamble;
ath9k_hw_set11n_txdesc(ah, ds,
- skb->len + FCS_LEN, /* frame length */
- ATH9K_PKT_TYPE_BEACON, /* Atheros packet type */
+ skb->len + FCS_LEN, /* frame length */
+ ATH9K_PKT_TYPE_BEACON, /* Atheros packet type */
avp->av_btxctl.txpower, /* txpower XXX */
- ATH9K_TXKEYIX_INVALID, /* no encryption */
- ATH9K_KEY_TYPE_CLEAR, /* no encryption */
- flags /* no ack, veol for beacons */
+ ATH9K_TXKEYIX_INVALID, /* no encryption */
+ ATH9K_KEY_TYPE_CLEAR, /* no encryption */
+ flags /* no ack,
+ veol for beacons */
);
/* NB: beacon's BufLen must be a multiple of 4 bytes */
ath9k_hw_filltxdesc(ah, ds,
roundup(skb->len, 4), /* buffer length */
- true, /* first segment */
- true, /* last segment */
- ds /* first descriptor */
+ true, /* first segment */
+ true, /* last segment */
+ ds /* first descriptor */
);
memzero(series, sizeof(struct ath9k_11n_rate_series) * 4);
@@ -153,22 +151,23 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
struct ath_buf *bf;
struct ath_vap *avp;
struct sk_buff *skb;
- int cabq_depth;
struct ath_txq *cabq;
struct ieee80211_tx_info *info;
+ int cabq_depth;
+
avp = sc->sc_vaps[if_id];
+ ASSERT(avp);
cabq = sc->sc_cabq;
- ASSERT(avp);
-
if (avp->av_bcbuf == NULL) {
DPRINTF(sc, ATH_DBG_BEACON, "%s: avp=%p av_bcbuf=%p\n",
__func__, avp, avp->av_bcbuf);
return NULL;
}
+
bf = avp->av_bcbuf;
- skb = (struct sk_buff *) bf->bf_mpdu;
+ skb = (struct sk_buff *)bf->bf_mpdu;
if (skb) {
pci_unmap_single(sc->pdev, bf->bf_dmacontext,
skb_end_pointer(skb) - skb->head,
@@ -179,17 +178,19 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
bf->bf_mpdu = skb;
if (skb == NULL)
return NULL;
+
info = IEEE80211_SKB_CB(skb);
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
/*
* TODO: make sure the seq# gets assigned properly (vs. other
* TX frames)
*/
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
sc->seq_no += 0x10;
hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
}
+
bf->bf_buf_addr = bf->bf_dmacontext =
pci_map_single(sc->pdev, skb->data,
skb_end_pointer(skb) - skb->head,
@@ -241,7 +242,6 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
* Startup beacon transmission for adhoc mode when they are sent entirely
* by the hardware using the self-linked descriptor + veol trick.
*/
-
static void ath_beacon_start_adhoc(struct ath_softc *sc, int if_id)
{
struct ath_hal *ah = sc->sc_ah;
@@ -278,7 +278,6 @@ static void ath_beacon_start_adhoc(struct ath_softc *sc, int if_id)
* min/max, and enable aifs). The info structure does not need to be
* persistant.
*/
-
int ath_beaconq_setup(struct ath_hal *ah)
{
struct ath9k_tx_queue_info qi;
@@ -299,26 +298,24 @@ int ath_beaconq_setup(struct ath_hal *ah)
* the ATH interface. This routine also calculates the beacon "slot" for
* staggared beacons in the mBSSID case.
*/
-
int ath_beacon_alloc(struct ath_softc *sc, int if_id)
{
struct ath_vap *avp;
- struct ieee80211_hdr *wh;
+ struct ieee80211_hdr *hdr;
struct ath_buf *bf;
struct sk_buff *skb;
+ __le64 tstamp;
avp = sc->sc_vaps[if_id];
ASSERT(avp);
/* Allocate a beacon descriptor if we haven't done so. */
if (!avp->av_bcbuf) {
- /*
- * Allocate beacon state for hostap/ibss. We know
- * a buffer is available.
- */
+ /* Allocate beacon state for hostap/ibss. We know
+ * a buffer is available. */
avp->av_bcbuf = list_first_entry(&sc->sc_bbuf,
- struct ath_buf, list);
+ struct ath_buf, list);
list_del(&avp->av_bcbuf->list);
if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP ||
@@ -362,9 +359,7 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id)
}
/*
- * NB: the beacon data buffer must be 32-bit aligned;
- * we assume the wbuf routines will return us something
- * with this alignment (perhaps should assert).
+ * NB: the beacon data buffer must be 32-bit aligned.
* FIXME: Fill avp->av_btxctl.txpower and
* avp->av_btxctl.shortPreamble
*/
@@ -375,6 +370,9 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id)
return -ENOMEM;
}
+ tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
+ sc->bc_tstamp = le64_to_cpu(tstamp);
+
/*
* Calculate a TSF adjustment factor required for
* staggered beacons. Note that we assume the format
@@ -408,8 +406,8 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id)
__func__, "stagger",
avp->av_bslot, intval, (unsigned long long)tsfadjust);
- wh = (struct ieee80211_hdr *)skb->data;
- memcpy(&wh[1], &val, sizeof(val));
+ hdr = (struct ieee80211_hdr *)skb->data;
+ memcpy(&hdr[1], &val, sizeof(val));
}
bf->bf_buf_addr = bf->bf_dmacontext =
@@ -425,9 +423,8 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id)
* Reclaim beacon resources and return buffer to the pool.
*
* Checks the VAP to put the beacon frame buffer back to the ATH object
- * queue, and de-allocates any wbuf frames that were sent as CAB traffic.
+ * queue, and de-allocates any skbs that were sent as CAB traffic.
*/
-
void ath_beacon_return(struct ath_softc *sc, struct ath_vap *avp)
{
if (avp->av_bcbuf != NULL) {
@@ -459,10 +456,7 @@ void ath_beacon_return(struct ath_softc *sc, struct ath_vap *avp)
* Transmit one or more beacon frames at SWBA. Dynamic updates to the frame
* contents are done as needed and the slot time is also adjusted based on
* current state.
- *
- * This tasklet is not scheduled, it's called in ISR context.
*/
-
void ath9k_beacon_tasklet(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *)data;
@@ -490,6 +484,8 @@ void ath9k_beacon_tasklet(unsigned long data)
* and wait for the next. Missed beacons indicate
* a problem and should not occur. If we miss too
* many consecutive beacons reset the device.
+ *
+ * FIXME: Clean up this mess !!
*/
if (ath9k_hw_numtxpending(ah, sc->sc_bhalq) != 0) {
sc->sc_bmisscount++;
@@ -505,19 +501,16 @@ void ath9k_beacon_tasklet(unsigned long data)
__func__, sc->sc_bmisscount);
if (show_cycles) {
/*
- * Display cycle counter stats
- * from HW to aide in debug of
- * stickiness.
+ * Display cycle counter stats from HW
+ * to aide in debug of stickiness.
*/
- DPRINTF(sc,
- ATH_DBG_BEACON,
+ DPRINTF(sc, ATH_DBG_BEACON,
"%s: busy times: rx_clear=%d, "
"rx_frame=%d, tx_frame=%d\n",
__func__, rx_clear, rx_frame,
tx_frame);
} else {
- DPRINTF(sc,
- ATH_DBG_BEACON,
+ DPRINTF(sc, ATH_DBG_BEACON,
"%s: unable to obtain "
"busy times\n", __func__);
}
@@ -529,8 +522,7 @@ void ath9k_beacon_tasklet(unsigned long data)
} else if (sc->sc_bmisscount >= BSTUCK_THRESH) {
if (sc->sc_flags & SC_OP_NO_RESET) {
if (sc->sc_bmisscount == BSTUCK_THRESH) {
- DPRINTF(sc,
- ATH_DBG_BEACON,
+ DPRINTF(sc, ATH_DBG_BEACON,
"%s: beacon is officially "
"stuck\n", __func__);
ath9k_hw_dmaRegDump(ah);
@@ -542,13 +534,12 @@ void ath9k_beacon_tasklet(unsigned long data)
ath_bstuck_process(sc);
}
}
-
return;
}
+
if (sc->sc_bmisscount != 0) {
if (sc->sc_flags & SC_OP_NO_RESET) {
- DPRINTF(sc,
- ATH_DBG_BEACON,
+ DPRINTF(sc, ATH_DBG_BEACON,
"%s: resume beacon xmit after %u misses\n",
__func__, sc->sc_bmisscount);
} else {
@@ -572,10 +563,12 @@ void ath9k_beacon_tasklet(unsigned long data)
tsftu = TSF_TO_TU(tsf>>32, tsf);
slot = ((tsftu % intval) * ATH_BCBUF) / intval;
if_id = sc->sc_bslot[(slot + 1) % ATH_BCBUF];
+
DPRINTF(sc, ATH_DBG_BEACON,
- "%s: slot %d [tsf %llu tsftu %u intval %u] if_id %d\n",
- __func__, slot, (unsigned long long) tsf, tsftu,
- intval, if_id);
+ "%s: slot %d [tsf %llu tsftu %u intval %u] if_id %d\n",
+ __func__, slot, (unsigned long long)tsf, tsftu,
+ intval, if_id);
+
bfaddr = 0;
if (if_id != ATH_IF_ID_ANY) {
bf = ath_beacon_generate(sc, if_id);
@@ -632,9 +625,8 @@ void ath9k_beacon_tasklet(unsigned long data)
* Tasklet for Beacon Stuck processing
*
* Processing for Beacon Stuck.
- * Basically calls the ath_internal_reset function to reset the chip.
+ * Basically resets the chip.
*/
-
void ath_bstuck_process(struct ath_softc *sc)
{
DPRINTF(sc, ATH_DBG_BEACON,
@@ -658,13 +650,12 @@ void ath_bstuck_process(struct ath_softc *sc)
* interrupt when we stop seeing beacons from the AP
* we've associated with.
*/
-
void ath_beacon_config(struct ath_softc *sc, int if_id)
{
struct ath_hal *ah = sc->sc_ah;
- u32 nexttbtt, intval;
struct ath_beacon_config conf;
enum ath9k_opmode av_opmode;
+ u32 nexttbtt, intval;
if (if_id != ATH_IF_ID_ANY)
av_opmode = sc->sc_vaps[if_id]->av_opmode;
@@ -673,12 +664,6 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
memzero(&conf, sizeof(struct ath_beacon_config));
- /* FIXME: Use default values for now - Sujith */
- /* Query beacon configuration first */
- /*
- * Protocol stack doesn't support dynamic beacon configuration,
- * use default configurations.
- */
conf.beacon_interval = sc->hw->conf.beacon_int ?
sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
conf.listen_interval = 1;
@@ -687,8 +672,8 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
conf.bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf.beacon_interval;
/* extract tstamp from last beacon and convert to TU */
- nexttbtt = TSF_TO_TU(get_unaligned_le32(conf.u.last_tstamp + 4),
- get_unaligned_le32(conf.u.last_tstamp));
+ nexttbtt = TSF_TO_TU(sc->bc_tstamp >> 32, sc->bc_tstamp);
+
/* XXX conditionalize multi-bss support? */
if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP) {
/*
@@ -704,12 +689,14 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
intval = conf.beacon_interval & ATH9K_BEACON_PERIOD;
}
- if (nexttbtt == 0) /* e.g. for ap mode */
+ if (nexttbtt == 0) /* e.g. for ap mode */
nexttbtt = intval;
- else if (intval) /* NB: can be 0 for monitor mode */
+ else if (intval) /* NB: can be 0 for monitor mode */
nexttbtt = roundup(nexttbtt, intval);
+
DPRINTF(sc, ATH_DBG_BEACON, "%s: nexttbtt %u intval %u (%u)\n",
__func__, nexttbtt, intval, conf.beacon_interval);
+
/* Check for ATH9K_M_HOSTAP and sc_nostabeacons for WDS client */
if (sc->sc_ah->ah_opmode == ATH9K_M_STA) {
struct ath9k_beacon_state bs;
@@ -723,19 +710,19 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
* last beacon we received (which may be none).
*/
dtimperiod = conf.dtim_period;
- if (dtimperiod <= 0) /* NB: 0 if not known */
+ if (dtimperiod <= 0) /* NB: 0 if not known */
dtimperiod = 1;
dtimcount = conf.dtim_count;
- if (dtimcount >= dtimperiod) /* NB: sanity check */
- dtimcount = 0; /* XXX? */
- cfpperiod = 1; /* NB: no PCF support yet */
+ if (dtimcount >= dtimperiod) /* NB: sanity check */
+ dtimcount = 0;
+ cfpperiod = 1; /* NB: no PCF support yet */
cfpcount = 0;
sleepduration = conf.listen_interval * intval;
if (sleepduration <= 0)
sleepduration = intval;
-#define FUDGE 2
+#define FUDGE 2
/*
* Pull nexttbtt forward to reflect the current
* TSF and calculate dtim+cfp state for the result.
@@ -759,6 +746,7 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
bs.bs_cfpmaxduration = 0;
+
/*
* Calculate the number of consecutive beacons to miss
* before taking a BMISS interrupt. The configuration
@@ -767,9 +755,8 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
* result to at most 15 beacons.
*/
if (sleepduration > intval) {
- bs.bs_bmissthreshold =
- conf.listen_interval *
- ATH_DEFAULT_BMISS_LIMIT / 2;
+ bs.bs_bmissthreshold = conf.listen_interval *
+ ATH_DEFAULT_BMISS_LIMIT / 2;
} else {
bs.bs_bmissthreshold =
DIV_ROUND_UP(conf.bmiss_timeout, intval);
@@ -789,8 +776,8 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
* XXX fixed at 100ms
*/
- bs.bs_sleepduration =
- roundup(IEEE80211_MS_TO_TU(100), sleepduration);
+ bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100),
+ sleepduration);
if (bs.bs_sleepduration > bs.bs_dtimperiod)
bs.bs_sleepduration = bs.bs_dtimperiod;
@@ -834,9 +821,9 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
if (sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
/*
* Pull nexttbtt forward to reflect the current
- * TSF .
+ * TSF
*/
-#define FUDGE 2
+#define FUDGE 2
if (!(intval & ATH9K_BEACON_RESET_TSF)) {
tsf = ath9k_hw_gettsf64(ah);
tsftu = TSF_TO_TU((u32)(tsf>>32),
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 10:54:32 +0000