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net80211: refactor scan_signal()

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- Pass scan state and additional internal flags as a parameters.
- Add locked version.

Tested with:
 * Intel 3945BG, STA mode.
 * RTL8188EU, STA mode.

Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D5148
This commit is contained in:
Andriy Voskoboinyk 2016-02-29 21:00:10 +00:00
parent 9f82bedaa1
commit f4f4f6a197
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=296234
1 changed files with 28 additions and 26 deletions
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54
sys/net80211/ieee80211_scan_sw.c
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@ -98,7 +98,8 @@ struct scan_state {
static void scan_curchan(struct ieee80211_scan_state *, unsigned long);
static void scan_mindwell(struct ieee80211_scan_state *);
static void scan_signal(void *);
static void scan_signal(struct ieee80211_scan_state *, int);
static void scan_signal_locked(struct ieee80211_scan_state *, int);
static void scan_start(void *, int);
static void scan_curchan_task(void *, int);
static void scan_end(struct ieee80211_scan_state *, int);
@ -112,10 +113,7 @@ ieee80211_swscan_detach(struct ieee80211com *ic)
struct ieee80211_scan_state *ss = ic->ic_scan;
if (ss != NULL) {
IEEE80211_LOCK(ic);
SCAN_PRIVATE(ss)->ss_iflags |= ISCAN_ABORT;
scan_signal(ss);
IEEE80211_UNLOCK(ic);
scan_signal(ss, ISCAN_ABORT);
ieee80211_draintask(ic, &SCAN_PRIVATE(ss)->ss_scan_start);
taskqueue_drain_timeout(ic->ic_tq,
&SCAN_PRIVATE(ss)->ss_scan_curchan);
@ -157,10 +155,8 @@ ieee80211_swscan_vdetach(struct ieee80211vap *vap)
IEEE80211_LOCK_ASSERT(ic);
ss = ic->ic_scan;
if (ss != NULL && ss->ss_vap == vap) {
if (ic->ic_flags & IEEE80211_F_SCAN) {
SCAN_PRIVATE(ss)->ss_iflags |= ISCAN_ABORT;
scan_signal(ss);
}
if (ic->ic_flags & IEEE80211_F_SCAN)
scan_signal_locked(ss, ISCAN_ABORT);
}
}
@ -446,11 +442,10 @@ cancel_scan(struct ieee80211vap *vap, int any, const char *func)
ss->ss_flags & IEEE80211_SCAN_ACTIVE ?
"active" : "passive");
/* clear bg scan NOPICK and mark cancel request */
/* clear bg scan NOPICK */
ss->ss_flags &= ~IEEE80211_SCAN_NOPICK;
SCAN_PRIVATE(ss)->ss_iflags |= ISCAN_CANCEL;
/* wake up the scan task */
scan_signal(ss);
/* mark cancel request and wake up the scan task */
scan_signal_locked(ss, ISCAN_CANCEL);
} else {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: called; F_SCAN=%d, vap=%s, CANCEL=%d\n",
@ -487,15 +482,12 @@ ieee80211_swscan_cancel_anyscan(struct ieee80211vap *vap)
static void
ieee80211_swscan_scan_next(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: called\n", __func__);
/* wake up the scan task */
IEEE80211_LOCK(ic);
scan_signal(ss);
IEEE80211_UNLOCK(ic);
scan_signal(ss, 0);
}
/*
@ -511,7 +503,7 @@ ieee80211_swscan_scan_done(struct ieee80211vap *vap)
IEEE80211_LOCK_ASSERT(ic);
ss = ic->ic_scan;
scan_signal(ss);
scan_signal_locked(ss, 0);
}
/*
@ -569,15 +561,27 @@ scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
}
static void
scan_signal(void *arg)
scan_signal(struct ieee80211_scan_state *ss, int iflags)
{
struct ieee80211com *ic = ss->ss_ic;
IEEE80211_UNLOCK_ASSERT(ic);
IEEE80211_LOCK(ic);
scan_signal_locked(ss, iflags);
IEEE80211_UNLOCK(ic);
}
static void
scan_signal_locked(struct ieee80211_scan_state *ss, int iflags)
{
struct ieee80211_scan_state *ss = (struct ieee80211_scan_state *) arg;
struct scan_state *ss_priv = SCAN_PRIVATE(ss);
struct timeout_task *scan_task = &ss_priv->ss_scan_curchan;
struct ieee80211com *ic = ss->ss_ic;
IEEE80211_LOCK_ASSERT(ic);
ss_priv->ss_iflags |= iflags;
if (ss_priv->ss_iflags & ISCAN_RUNNING) {
if (taskqueue_cancel_timeout(ic->ic_tq, scan_task, NULL) == 0)
taskqueue_enqueue_timeout(ic->ic_tq, scan_task, 0);
@ -591,13 +595,11 @@ scan_signal(void *arg)
static void
scan_mindwell(struct ieee80211_scan_state *ss)
{
struct ieee80211com *ic = ss->ss_ic;
struct ieee80211vap *vap = ss->ss_vap;
IEEE80211_DPRINTF(ss->ss_vap, IEEE80211_MSG_SCAN, "%s: called\n", __func__);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: called\n", __func__);
IEEE80211_LOCK(ic);
scan_signal(ss);
IEEE80211_UNLOCK(ic);
scan_signal(ss, 0);
}
static void