[net80211] Initial full-offload scan support.
This is a very simple addition to the net80211 scan support. It doesn't implement a replacement scan interface - it just disables the pieces that we should disable to make this lifecycle a bit more managable. There's more work to come before full scan offload support is available but it should be good enough for driver work. * add a flag to say "full offload" * don't do probe requests when scanning full-offload - firmware can do that * don't do powersave transitions and buffering - firmware can do that tested: * iwm(4) - STA mode * ath10k port (local, not in freebsd-head yet) Reviewed by: avos Differential Revision: https://reviews.freebsd.org/D8262
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=307602
@ -412,6 +412,12 @@ ieee80211_swscan_bg_scan(const struct ieee80211_scanner *scan,
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return (ic->ic_flags & IEEE80211_F_SCAN);
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}
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/*
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* Taskqueue work to cancel a scan.
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*
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* Note: for offload scan devices, we may want to call into the
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* driver to try and cancel scanning, however it may not be cancelable.
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*/
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static void
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cancel_scan(struct ieee80211vap *vap, int any, const char *func)
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{
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@ -511,6 +517,12 @@ ieee80211_swscan_probe_curchan(struct ieee80211vap *vap, int force)
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struct ifnet *ifp = vap->iv_ifp;
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int i;
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/*
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* Full-offload scan devices don't require this.
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*/
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if (vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD)
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return;
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/*
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* Send directed probe requests followed by any
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* broadcast probe request.
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@ -617,7 +629,14 @@ scan_start(void *arg, int pending)
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return;
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}
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if (vap->iv_opmode == IEEE80211_M_STA &&
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/*
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* Put the station into power save mode.
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*
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* This is only required if we're not a full-offload devices;
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* those devices manage scan/traffic differently.
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*/
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if (((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) == 0) &&
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vap->iv_opmode == IEEE80211_M_STA &&
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vap->iv_state == IEEE80211_S_RUN) {
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if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0) {
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/* Enable station power save mode */
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@ -870,7 +889,12 @@ scan_done(struct ieee80211_scan_state *ss, int scandone)
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* waiting for us.
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*/
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if (scandone) {
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vap->iv_sta_ps(vap, 0);
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/*
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* If we're not a scan offload device, come back out of
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* station powersave. Offload devices handle this themselves.
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*/
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if ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) == 0)
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vap->iv_sta_ps(vap, 0);
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if (ss->ss_next >= ss->ss_last)
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ic->ic_flags_ext &= ~IEEE80211_FEXT_BGSCAN;
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@ -601,11 +601,12 @@ MALLOC_DECLARE(M_80211_VAP);
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#define IEEE80211_FEXT_WDSLEGACY 0x00010000 /* CONF: legacy WDS operation */
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#define IEEE80211_FEXT_PROBECHAN 0x00020000 /* CONF: probe passive channel*/
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#define IEEE80211_FEXT_UNIQMAC 0x00040000 /* CONF: user or computed mac */
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#define IEEE80211_FEXT_SCAN_OFFLOAD 0x00080000 /* CONF: scan is fully offloaded */
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#define IEEE80211_FEXT_BITS \
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"\20\2INACT\3SCANWAIT\4BGSCAN\5WPS\6TSN\7SCANREQ\10RESUME" \
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"\0114ADDR\12NONEPR_PR\13SWBMISS\14DFS\15DOTD\16STATEWAIT\17REINIT" \
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"\20BPF\21WDSLEGACY\22PROBECHAN\23UNIQMAC"
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"\20BPF\21WDSLEGACY\22PROBECHAN\23UNIQMAC\24SCAN_OFFLOAD"
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/* ic_flags_ht/iv_flags_ht */
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#define IEEE80211_FHT_NONHT_PR 0x00000001 /* STATUS: non-HT sta present */
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