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LinuxKPI: 80211: scanning code updates

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For consistency rename LKPI_SCAN_RUNNING adding a LHW_ prefix.
Add a local flag LKPI_LHW_SCAN_HW mirroring the net80211
IEEE80211_FEXT_SCAN_OFFLOAD flag.
Slightly simplify the code.
Overload (*ic_scan_curchan) and (*ic_scan_mindwell) so that we can
call the net80211 implementation in case of software scan but skip it
in case of full-offload scans.
Also add a bandaid to our (*ic_set_channel) implementation to not siwtch
channels if we have an active hw_scan running.

Obtained from:	bz/wireless-dev
Sponsored by:	The FreeBSD Foundation (partially)
MFC after:	4 days
This commit is contained in:
Bjoern A. Zeeb 2022-09-03 23:40:51 +00:00
parent 527687a9e3
commit a486fbbd78
3 changed files with 57 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
sys/compat/linuxkpi/common/src/linux_80211.c
View File

@ -797,7 +797,7 @@ lkpi_stop_hw_scan(struct lkpi_hw *lhw, struct ieee80211_vif *vif)
struct ieee80211_hw *hw;
int error;
if ((lhw->scan_flags & LKPI_SCAN_RUNNING) == 0)
if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) == 0)
return;
hw = LHW_TO_HW(lhw);
@ -812,7 +812,7 @@ lkpi_stop_hw_scan(struct lkpi_hw *lhw, struct ieee80211_vif *vif)
LKPI_80211_LHW_UNLOCK(lhw);
IEEE80211_LOCK(lhw->ic);
if ((lhw->scan_flags & LKPI_SCAN_RUNNING) != 0)
if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) != 0)
ic_printf(lhw->ic, "%s: failed to cancel scan: %d (%p, %p)\n",
__func__, error, lhw, vif);
}
@ -2514,7 +2514,7 @@ lkpi_ic_scan_start(struct ieee80211com *ic)
int error;
lhw = ic->ic_softc;
if ((lhw->scan_flags & LKPI_SCAN_RUNNING) != 0) {
if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) != 0) {
/* A scan is still running. */
return;
}
@ -2527,7 +2527,9 @@ lkpi_ic_scan_start(struct ieee80211com *ic)
}
hw = LHW_TO_HW(lhw);
if ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) == 0) {
if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0) {
/* If hw_scan is cleared clear FEXT_SCAN_OFFLOAD too. */
vap->iv_flags_ext &= ~IEEE80211_FEXT_SCAN_OFFLOAD;
sw_scan:
lvif = VAP_TO_LVIF(vap);
vif = LVIF_TO_VIF(lvif);
@ -2670,7 +2672,7 @@ lkpi_ic_scan_start(struct ieee80211com *ic)
* not possible. Fall back to sw scan in that case.
*/
if (error == 1) {
vap->iv_flags_ext &= ~IEEE80211_FEXT_SCAN_OFFLOAD;
lhw->scan_flags &= ~LKPI_LHW_SCAN_HW;
ieee80211_start_scan(vap,
IEEE80211_SCAN_ACTIVE |
IEEE80211_SCAN_NOPICK |
@ -2692,26 +2694,25 @@ static void
lkpi_ic_scan_end(struct ieee80211com *ic)
{
struct lkpi_hw *lhw;
struct ieee80211_scan_state *ss;
struct ieee80211vap *vap;
lhw = ic->ic_softc;
if ((lhw->scan_flags & LKPI_SCAN_RUNNING) == 0) {
if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) == 0) {
return;
}
ss = ic->ic_scan;
vap = ss->ss_vap;
if (vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) {
/* Nothing to do. */
} else {
if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0) {
struct ieee80211_scan_state *ss;
struct ieee80211vap *vap;
struct ieee80211_hw *hw;
struct lkpi_vif *lvif;
struct ieee80211_vif *vif;
ss = ic->ic_scan;
vap = ss->ss_vap;
hw = LHW_TO_HW(lhw);
lvif = VAP_TO_LVIF(vap);
vif = LVIF_TO_VIF(lvif);
lkpi_80211_mo_sw_scan_complete(hw, vif);
/* Send PS to stop buffering if n80211 does not for us? */
@ -2721,6 +2722,27 @@ lkpi_ic_scan_end(struct ieee80211com *ic)
}
}
static void
lkpi_ic_scan_curchan(struct ieee80211_scan_state *ss,
unsigned long maxdwell)
{
struct lkpi_hw *lhw;
lhw = ss->ss_ic->ic_softc;
if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0)
lhw->ic_scan_curchan(ss, maxdwell);
}
static void
lkpi_ic_scan_mindwell(struct ieee80211_scan_state *ss)
{
struct lkpi_hw *lhw;
lhw = ss->ss_ic->ic_softc;
if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0)
lhw->ic_scan_mindwell(ss);
}
static void
lkpi_ic_set_channel(struct ieee80211com *ic)
{
@ -2736,6 +2758,11 @@ lkpi_ic_set_channel(struct ieee80211com *ic)
if (lhw->ops->config == NULL)
return;
/* If we have a hw_scan running do not switch channels. */
if ((lhw->scan_flags & (LKPI_LHW_SCAN_RUNNING|LKPI_LHW_SCAN_HW)) ==
(LKPI_LHW_SCAN_RUNNING|LKPI_LHW_SCAN_HW))
return;
c = ic->ic_curchan;
if (c == NULL || c == IEEE80211_CHAN_ANYC) {
ic_printf(ic, "%s: c %p ops->config %p\n", __func__,
@ -3482,6 +3509,7 @@ linuxkpi_ieee80211_ifattach(struct ieee80211_hw *hw)
* the flag.
*/
ic->ic_flags_ext |= IEEE80211_FEXT_SCAN_OFFLOAD;
lhw->scan_flags |= LKPI_LHW_SCAN_HW;
}
#ifdef __notyet__
@ -3540,6 +3568,11 @@ linuxkpi_ieee80211_ifattach(struct ieee80211_hw *hw)
ic->ic_getradiocaps = lkpi_ic_getradiocaps;
ic->ic_wme.wme_update = lkpi_ic_wme_update;
lhw->ic_scan_curchan = ic->ic_scan_curchan;
ic->ic_scan_curchan = lkpi_ic_scan_curchan;
lhw->ic_scan_mindwell = ic->ic_scan_mindwell;
ic->ic_scan_mindwell = lkpi_ic_scan_mindwell;
lhw->ic_node_alloc = ic->ic_node_alloc;
ic->ic_node_alloc = lkpi_ic_node_alloc;
lhw->ic_node_init = ic->ic_node_init;
@ -3781,7 +3814,7 @@ linuxkpi_ieee80211_scan_completed(struct ieee80211_hw *hw,
LKPI_80211_LHW_LOCK(lhw);
free(lhw->hw_req, M_LKPI80211);
lhw->hw_req = NULL;
lhw->scan_flags &= ~LKPI_SCAN_RUNNING;
lhw->scan_flags &= ~LKPI_LHW_SCAN_RUNNING;
wakeup(lhw);
LKPI_80211_LHW_UNLOCK(lhw);

8
sys/compat/linuxkpi/common/src/linux_80211.h
View File

@ -144,6 +144,11 @@ struct lkpi_hw { /* name it mac80211_sc? */
struct mtx mtx;
/* Scan functions we overload to handle depending on scan mode. */
void (*ic_scan_curchan)(struct ieee80211_scan_state *,
unsigned long);
void (*ic_scan_mindwell)(struct ieee80211_scan_state *);
/* Node functions we overload to sync state. */
struct ieee80211_node * (*ic_node_alloc)(struct ieee80211vap *,
const uint8_t [IEEE80211_ADDR_LEN]);
@ -153,7 +158,8 @@ struct lkpi_hw { /* name it mac80211_sc? */
#define LKPI_MAC80211_DRV_STARTED 0x00000001
uint32_t sc_flags;
#define LKPI_SCAN_RUNNING 0x00000001
#define LKPI_LHW_SCAN_RUNNING 0x00000001
#define LKPI_LHW_SCAN_HW 0x00000002
uint32_t scan_flags;
int supbands; /* Number of supported bands. */

6
sys/compat/linuxkpi/common/src/linux_80211_macops.c
View File

@ -205,10 +205,10 @@ lkpi_80211_mo_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
goto out;
}
lhw->scan_flags |= LKPI_SCAN_RUNNING;
lhw->scan_flags |= LKPI_LHW_SCAN_RUNNING;
error = lhw->ops->hw_scan(hw, vif, sr);
if (error != 0)
lhw->scan_flags &= ~LKPI_SCAN_RUNNING;
lhw->scan_flags &= ~LKPI_LHW_SCAN_RUNNING;
out:
return (error);
@ -236,7 +236,7 @@ lkpi_80211_mo_sw_scan_complete(struct ieee80211_hw *hw, struct ieee80211_vif *vi
return;
lhw->ops->sw_scan_complete(hw, vif);
lhw->scan_flags &= ~LKPI_SCAN_RUNNING;
lhw->scan_flags &= ~LKPI_LHW_SCAN_RUNNING;
}
void