int
rtwn_cmd_sleepable(struct rtwn_softc *sc, const void *ptr, size_t len,
CMD_FUNC_PROTO)
{
struct ieee80211com *ic = &sc->sc_ic;
KASSERT(len <= sizeof(union sec_param), ("buffer overflow"));
RTWN_CMDQ_LOCK(sc);
if (sc->sc_detached) {
RTWN_CMDQ_UNLOCK(sc);
return (ESHUTDOWN);
}
if (sc->cmdq[sc->cmdq_last].func != NULL) {
device_printf(sc->sc_dev, "%s: cmdq overflow\n", __func__);
RTWN_CMDQ_UNLOCK(sc);
return (EAGAIN);
}
if (ptr != NULL)
memcpy(&sc->cmdq[sc->cmdq_last].data, ptr, len);
sc->cmdq[sc->cmdq_last].func = func;
sc->cmdq_last = (sc->cmdq_last + 1) % RTWN_CMDQ_SIZE;
RTWN_CMDQ_UNLOCK(sc);
ieee80211_runtask(ic, &sc->cmdq_task);
return (0);
}
/*
* Synchronize flag bit state in the parent ifnet structure
* according to the state of all vap ifnet's. This is used,
* for example, to handle IFF_PROMISC and IFF_ALLMULTI.
*/
void
ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
{
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211vap *vap;
int bit, oflags;
IEEE80211_LOCK_ASSERT(ic);
bit = 0;
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
if (vap->iv_ifp->if_flags & flag) {
/*
* XXX the bridge sets PROMISC but we don't want to
* enable it on the device, discard here so all the
* drivers don't need to special-case it
*/
if (flag == IFF_PROMISC &&
!(vap->iv_opmode == IEEE80211_M_MONITOR ||
(vap->iv_opmode == IEEE80211_M_AHDEMO &&
(vap->iv_caps & IEEE80211_C_TDMA) == 0)))
continue;
bit = 1;
break;
}
oflags = ifp->if_flags;
if (bit)
ifp->if_flags |= flag;
else
ifp->if_flags &= ~flag;
if ((ifp->if_flags ^ oflags) & flag) {
/* XXX should we return 1/0 and let caller do this? */
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
if (flag == IFF_PROMISC)
ieee80211_runtask(ic, &ic->ic_promisc_task);
else if (flag == IFF_ALLMULTI)
ieee80211_runtask(ic, &ic->ic_mcast_task);
}
}
}
static void
athp_taskq_task(void *arg, int npending)
{
struct ath10k *ar = arg;
struct ieee80211com *ic = &ar->sc_ic;
struct athp_taskq_entry *e;
struct athp_taskq_head *h;
int n = 0;
h = ar->sc_taskq_head;
if (h == NULL)
return;
ath10k_dbg(ar, ATH10K_DBG_TASKQ, "%s: called\n", __func__);
/*
* Run through the queue up to 4 at a time, and
* run the callbacks.
*/
ATHP_TASKQ_LOCK(h);
while ((n < 4) && (e = TAILQ_FIRST(&h->list)) != NULL) {
TAILQ_REMOVE(&h->list, e, node);
e->on_queue = 0;
ATHP_TASKQ_UNLOCK(h);
ath10k_dbg(ar, ATH10K_DBG_TASKQ, "%s: calling cb %s %p (ptr %p)\n",
__func__,
e->cb_str,
e->cb,
e);
e->cb(ar, e, 1);
athp_taskq_entry_free(ar, e);
n++;
ATHP_TASKQ_LOCK(h);
}
/* Whilst locked, see if there's any more work to do */
n = 0;
if (h->is_running && TAILQ_FIRST(&h->list) != NULL) {
n = 1;
}
ATHP_TASKQ_UNLOCK(h);
if (n)
ieee80211_runtask(ic, &h->run_task);
}
void
athp_taskq_start(struct ath10k *ar)
{
struct ieee80211com *ic = &ar->sc_ic;
struct athp_taskq_head *h;
h = ar->sc_taskq_head;
if (h == NULL)
return;
ath10k_dbg(ar, ATH10K_DBG_TASKQ, "%s: called\n", __func__);
ATHP_TASKQ_LOCK(h);
h->is_running = 1;
ATHP_TASKQ_UNLOCK(h);
ieee80211_runtask(ic, &h->run_task);
}
int
athp_taskq_queue(struct ath10k *ar, struct athp_taskq_entry *e,
const char *str, athp_taskq_cmd_cb *cb)
{
struct ieee80211com *ic = &ar->sc_ic;
struct athp_taskq_head *h;
int do_run = 0;
h = ar->sc_taskq_head;
if (h == NULL)
return (EINVAL);
ath10k_dbg(ar, ATH10K_DBG_TASKQ,
"%s: queuing cb %s %p (ptr %p)\n",
__func__,
str,
cb,
e);
e->ar = ar;
e->on_queue = 1;
e->cb = cb;
e->cb_str = str;
ATHP_TASKQ_LOCK(h);
e->on_queue = 1;
TAILQ_INSERT_TAIL(&h->list, e, node);
if (h->is_running)
do_run = 1;
ATHP_TASKQ_UNLOCK(h);
if (do_run)
ieee80211_runtask(ic, &h->run_task);
return (0);
}
static void
scan_end(struct ieee80211_scan_state *ss, int scandone)
{
struct scan_state *ss_priv = SCAN_PRIVATE(ss);
struct ieee80211vap *vap = ss->ss_vap;
struct ieee80211com *ic = ss->ss_ic;
IEEE80211_LOCK_ASSERT(ic);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: out\n", __func__);
if (ss_priv->ss_iflags & ISCAN_ABORT) {
scan_done(ss, scandone);
return;
}
IEEE80211_UNLOCK(ic);
ic->ic_scan_end(ic); /* notify driver */
IEEE80211_LOCK(ic);
/* XXX scan state can change! Re-validate scan state! */
/*
* Since a cancellation may have occurred during one of the
* driver calls (whilst unlocked), update scandone.
*/
if (scandone == 0 && (ss_priv->ss_iflags & ISCAN_CANCEL) != 0) {
/* XXX printf? */
if_printf(vap->iv_ifp,
"%s: OOPS! scan cancelled during driver call (1)!\n",
__func__);
scandone = 1;
}
/*
* Record scan complete time. Note that we also do
* this when canceled so any background scan will
* not be restarted for a while.
*/
if (scandone)
ic->ic_lastscan = ticks;
/* return to the bss channel */
if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
ic->ic_curchan != ic->ic_bsschan) {
ieee80211_setupcurchan(ic, ic->ic_bsschan);
IEEE80211_UNLOCK(ic);
ic->ic_set_channel(ic);
ieee80211_radiotap_chan_change(ic);
IEEE80211_LOCK(ic);
}
/* clear internal flags and any indication of a pick */
ss_priv->ss_iflags &= ~ISCAN_REP;
ss->ss_flags &= ~IEEE80211_SCAN_GOTPICK;
/*
* If not canceled and scan completed, do post-processing.
* If the callback function returns 0, then it wants to
* continue/restart scanning. Unfortunately we needed to
* notify the driver to end the scan above to avoid having
* rx frames alter the scan candidate list.
*/
if ((ss_priv->ss_iflags & ISCAN_CANCEL) == 0 &&
!ss->ss_ops->scan_end(ss, vap) &&
(ss->ss_flags & IEEE80211_SCAN_ONCE) == 0 &&
ieee80211_time_before(ticks + ss->ss_mindwell, ss_priv->ss_scanend)) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: done, restart "
"[ticks %u, dwell min %lu scanend %lu]\n",
__func__,
ticks, ss->ss_mindwell, ss_priv->ss_scanend);
ss->ss_next = 0; /* reset to beginning */
if (ss->ss_flags & IEEE80211_SCAN_ACTIVE)
vap->iv_stats.is_scan_active++;
else
vap->iv_stats.is_scan_passive++;
ss->ss_ops->scan_restart(ss, vap); /* XXX? */
ieee80211_runtask(ic, &ss_priv->ss_scan_start);
IEEE80211_UNLOCK(ic);
return;
}
/* past here, scandone is ``true'' if not in bg mode */
if ((ss->ss_flags & IEEE80211_SCAN_BGSCAN) == 0)
scandone = 1;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s, [ticks %u, dwell min %lu scanend %lu]\n",
__func__, scandone ? "done" : "stopped",
ticks, ss->ss_mindwell, ss_priv->ss_scanend);
/*
* Since a cancellation may have occurred during one of the
* driver calls (whilst unlocked), update scandone.
*/
if (scandone == 0 && (ss_priv->ss_iflags & ISCAN_CANCEL) != 0) {
/* XXX printf? */
if_printf(vap->iv_ifp,
"%s: OOPS! scan cancelled during driver call (2)!\n",
__func__);
scandone = 1;
}
scan_done(ss, scandone);
}
/*
* Restart a previous scan. If the previous scan completed
* then we start again using the existing channel list.
*/
static int
ieee80211_swscan_bg_scan(const struct ieee80211_scanner *scan,
struct ieee80211vap *vap, int flags)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
/* XXX assert unlocked? */
// IEEE80211_UNLOCK_ASSERT(ic);
IEEE80211_LOCK(ic);
if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
u_int duration;
/*
* Go off-channel for a fixed interval that is large
* enough to catch most ap's but short enough that
* we can return on-channel before our listen interval
* expires.
*/
duration = IEEE80211_SCAN_OFFCHANNEL;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan, ticks %u duration %u\n", __func__,
ss->ss_flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive",
ticks, duration);
ieee80211_scan_update_locked(vap, scan);
if (ss->ss_ops != NULL) {
ss->ss_vap = vap;
/*
* A background scan does not select a new sta; it
* just refreshes the scan cache. Also, indicate
* the scan logic should follow the beacon schedule:
* we go off-channel and scan for a while, then
* return to the bss channel to receive a beacon,
* then go off-channel again. All during this time
* we notify the ap we're in power save mode. When
* the scan is complete we leave power save mode.
* If any beacon indicates there are frames pending
* for us then we drop out of power save mode
* (and background scan) automatically by way of the
* usual sta power save logic.
*/
ss->ss_flags |= IEEE80211_SCAN_NOPICK
| IEEE80211_SCAN_BGSCAN
| flags
;
/* if previous scan completed, restart */
if (ss->ss_next >= ss->ss_last) {
if (ss->ss_flags & IEEE80211_SCAN_ACTIVE)
vap->iv_stats.is_scan_active++;
else
vap->iv_stats.is_scan_passive++;
/*
* NB: beware of the scan cache being flushed;
* if the channel list is empty use the
* scan_start method to populate it.
*/
ss->ss_next = 0;
if (ss->ss_last != 0)
ss->ss_ops->scan_restart(ss, vap);
else {
ss->ss_ops->scan_start(ss, vap);
#ifdef IEEE80211_DEBUG
if (ieee80211_msg_scan(vap))
ieee80211_scan_dump(ss);
#endif /* IEEE80211_DEBUG */
}
}
ieee80211_swscan_set_scan_duration(vap, duration);
ss->ss_maxdwell = duration;
ic->ic_flags |= IEEE80211_F_SCAN;
ic->ic_flags_ext |= IEEE80211_FEXT_BGSCAN;
ieee80211_runtask(ic,
&SCAN_PRIVATE(ss)->ss_scan_start);
} else {
/* XXX msg+stat */
}
} else {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan already in progress\n", __func__,
ss->ss_flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive");
}
IEEE80211_UNLOCK(ic);
/* NB: racey, does it matter? */
return (ic->ic_flags & IEEE80211_F_SCAN);
}
/*
* Start a scan unless one is already going.
*/
static int
ieee80211_swscan_start_scan_locked(const struct ieee80211_scanner *scan,
struct ieee80211vap *vap, int flags, u_int duration,
u_int mindwell, u_int maxdwell,
u_int nssid, const struct ieee80211_scan_ssid ssids[])
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic);
if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: scan inhibited by pending channel change\n", __func__);
} else if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan, duration %u mindwell %u maxdwell %u, desired mode %s, %s%s%s%s%s%s\n"
, __func__
, flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive"
, duration, mindwell, maxdwell
, ieee80211_phymode_name[vap->iv_des_mode]
, flags & IEEE80211_SCAN_FLUSH ? "flush" : "append"
, flags & IEEE80211_SCAN_NOPICK ? ", nopick" : ""
, flags & IEEE80211_SCAN_NOJOIN ? ", nojoin" : ""
, flags & IEEE80211_SCAN_NOBCAST ? ", nobcast" : ""
, flags & IEEE80211_SCAN_PICK1ST ? ", pick1st" : ""
, flags & IEEE80211_SCAN_ONCE ? ", once" : ""
);
ieee80211_scan_update_locked(vap, scan);
if (ss->ss_ops != NULL) {
if ((flags & IEEE80211_SCAN_NOSSID) == 0)
ieee80211_scan_copy_ssid(vap, ss, nssid, ssids);
/* NB: top 4 bits for internal use */
ss->ss_flags = flags & 0xfff;
if (ss->ss_flags & IEEE80211_SCAN_ACTIVE)
vap->iv_stats.is_scan_active++;
else
vap->iv_stats.is_scan_passive++;
if (flags & IEEE80211_SCAN_FLUSH)
ss->ss_ops->scan_flush(ss);
if (flags & IEEE80211_SCAN_BGSCAN)
ic->ic_flags_ext |= IEEE80211_FEXT_BGSCAN;
/* Set duration for this particular scan */
ieee80211_swscan_set_scan_duration(vap, duration);
ss->ss_next = 0;
ss->ss_mindwell = mindwell;
ss->ss_maxdwell = maxdwell;
/* NB: scan_start must be before the scan runtask */
ss->ss_ops->scan_start(ss, vap);
#ifdef IEEE80211_DEBUG
if (ieee80211_msg_scan(vap))
ieee80211_scan_dump(ss);
#endif /* IEEE80211_DEBUG */
ic->ic_flags |= IEEE80211_F_SCAN;
/* Start scan task */
ieee80211_runtask(ic, &SCAN_PRIVATE(ss)->ss_scan_start);
}
return 1;
} else {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan already in progress\n", __func__,
ss->ss_flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive");
}
return 0;
}
static void
scan_task(void *arg, int pending)
{
#define ISCAN_REP (ISCAN_MINDWELL | ISCAN_DISCARD)
struct ieee80211_scan_state *ss = (struct ieee80211_scan_state *) arg;
struct ieee80211vap *vap = ss->ss_vap;
struct ieee80211com *ic = ss->ss_ic;
struct ieee80211_channel *chan;
unsigned long maxdwell, scanend;
int scandone = 0;
IEEE80211_LOCK(ic);
if (vap == NULL || (ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
(SCAN_PRIVATE(ss)->ss_iflags & ISCAN_ABORT)) {
/* Cancelled before we started */
goto done;
}
if (ss->ss_next == ss->ss_last) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: no channels to scan\n", __func__);
goto done;
}
if (vap->iv_opmode == IEEE80211_M_STA &&
vap->iv_state == IEEE80211_S_RUN) {
if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0) {
/* Enable station power save mode */
ieee80211_sta_pwrsave(vap, 1);
/*
* Use an 1ms delay so the null data frame has a chance
* to go out.
* XXX Should use M_TXCB mechanism to eliminate this.
*/
cv_timedwait(&SCAN_PRIVATE(ss)->ss_scan_cv,
IEEE80211_LOCK_OBJ(ic), hz / 1000);
if (SCAN_PRIVATE(ss)->ss_iflags & ISCAN_ABORT)
goto done;
}
}
scanend = ticks + SCAN_PRIVATE(ss)->ss_duration;
IEEE80211_UNLOCK(ic);
ic->ic_scan_start(ic); /* notify driver */
IEEE80211_LOCK(ic);
for (;;) {
scandone = (ss->ss_next >= ss->ss_last) ||
(SCAN_PRIVATE(ss)->ss_iflags & ISCAN_CANCEL) != 0;
if (scandone || (ss->ss_flags & IEEE80211_SCAN_GOTPICK) ||
(SCAN_PRIVATE(ss)->ss_iflags & ISCAN_ABORT) ||
time_after(ticks + ss->ss_mindwell, scanend))
break;
chan = ss->ss_chans[ss->ss_next++];
/*
* Watch for truncation due to the scan end time.
*/
if (time_after(ticks + ss->ss_maxdwell, scanend))
maxdwell = scanend - ticks;
else
maxdwell = ss->ss_maxdwell;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: chan %3d%c -> %3d%c [%s, dwell min %lums max %lums]\n",
__func__,
ieee80211_chan2ieee(ic, ic->ic_curchan),
channel_type(ic->ic_curchan),
ieee80211_chan2ieee(ic, chan), channel_type(chan),
(ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
(chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 ?
"active" : "passive",
ticks_to_msecs(ss->ss_mindwell), ticks_to_msecs(maxdwell));
/*
* Potentially change channel and phy mode.
*/
ic->ic_curchan = chan;
ic->ic_rt = ieee80211_get_ratetable(chan);
IEEE80211_UNLOCK(ic);
/*
* Perform the channel change and scan unlocked so the driver
* may sleep. Once set_channel returns the hardware has
* completed the channel change.
*/
ic->ic_set_channel(ic);
ieee80211_radiotap_chan_change(ic);
/*
* Scan curchan. Drivers for "intelligent hardware"
* override ic_scan_curchan to tell the device to do
* the work. Otherwise we manage the work outselves;
* sending a probe request (as needed), and arming the
* timeout to switch channels after maxdwell ticks.
*
* scan_curchan should only pause for the time required to
* prepare/initiate the hardware for the scan (if at all), the
* below condvar is used to sleep for the channels dwell time
* and allows it to be signalled for abort.
*/
ic->ic_scan_curchan(ss, maxdwell);
IEEE80211_LOCK(ic);
SCAN_PRIVATE(ss)->ss_chanmindwell = ticks + ss->ss_mindwell;
/* clear mindwell lock and initial channel change flush */
SCAN_PRIVATE(ss)->ss_iflags &= ~ISCAN_REP;
if ((SCAN_PRIVATE(ss)->ss_iflags & (ISCAN_CANCEL|ISCAN_ABORT)))
continue;
/* Wait to be signalled to scan the next channel */
cv_wait(&SCAN_PRIVATE(ss)->ss_scan_cv, IEEE80211_LOCK_OBJ(ic));
}
if (SCAN_PRIVATE(ss)->ss_iflags & ISCAN_ABORT)
goto done;
IEEE80211_UNLOCK(ic);
ic->ic_scan_end(ic); /* notify driver */
IEEE80211_LOCK(ic);
/*
* Record scan complete time. Note that we also do
* this when canceled so any background scan will
* not be restarted for a while.
*/
if (scandone)
ic->ic_lastscan = ticks;
/* return to the bss channel */
if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
ic->ic_curchan != ic->ic_bsschan) {
ieee80211_setupcurchan(ic, ic->ic_bsschan);
IEEE80211_UNLOCK(ic);
ic->ic_set_channel(ic);
ieee80211_radiotap_chan_change(ic);
IEEE80211_LOCK(ic);
}
/* clear internal flags and any indication of a pick */
SCAN_PRIVATE(ss)->ss_iflags &= ~ISCAN_REP;
ss->ss_flags &= ~IEEE80211_SCAN_GOTPICK;
/*
* If not canceled and scan completed, do post-processing.
* If the callback function returns 0, then it wants to
* continue/restart scanning. Unfortunately we needed to
* notify the driver to end the scan above to avoid having
* rx frames alter the scan candidate list.
*/
if ((SCAN_PRIVATE(ss)->ss_iflags & ISCAN_CANCEL) == 0 &&
!ss->ss_ops->scan_end(ss, vap) &&
(ss->ss_flags & IEEE80211_SCAN_ONCE) == 0 &&
time_before(ticks + ss->ss_mindwell, scanend)) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: done, restart "
"[ticks %u, dwell min %lu scanend %lu]\n",
__func__,
ticks, ss->ss_mindwell, scanend);
ss->ss_next = 0; /* reset to begining */
if (ss->ss_flags & IEEE80211_SCAN_ACTIVE)
vap->iv_stats.is_scan_active++;
else
vap->iv_stats.is_scan_passive++;
ss->ss_ops->scan_restart(ss, vap); /* XXX? */
ieee80211_runtask(ic, &SCAN_PRIVATE(ss)->ss_scan_task);
IEEE80211_UNLOCK(ic);
return;
}
/* past here, scandone is ``true'' if not in bg mode */
if ((ss->ss_flags & IEEE80211_SCAN_BGSCAN) == 0)
scandone = 1;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s, [ticks %u, dwell min %lu scanend %lu]\n",
__func__, scandone ? "done" : "stopped",
ticks, ss->ss_mindwell, scanend);
/*
* Clear the SCAN bit first in case frames are
* pending on the station power save queue. If
* we defer this then the dispatch of the frames
* may generate a request to cancel scanning.
*/
done:
ic->ic_flags &= ~IEEE80211_F_SCAN;
/*
* Drop out of power save mode when a scan has
* completed. If this scan was prematurely terminated
* because it is a background scan then don't notify
* the ap; we'll either return to scanning after we
* receive the beacon frame or we'll drop out of power
* save mode because the beacon indicates we have frames
* waiting for us.
*/
if (scandone) {
ieee80211_sta_pwrsave(vap, 0);
if (ss->ss_next >= ss->ss_last) {
ieee80211_notify_scan_done(vap);
ic->ic_flags_ext &= ~IEEE80211_FEXT_BGSCAN;
}
}
SCAN_PRIVATE(ss)->ss_iflags &= ~(ISCAN_CANCEL|ISCAN_ABORT);
ss->ss_flags &= ~(IEEE80211_SCAN_ONCE | IEEE80211_SCAN_PICK1ST);
IEEE80211_UNLOCK(ic);
#undef ISCAN_REP
}
