61cd9692bb
when an interface is going down. Right now it's quite possible (but very unlikely!) that ath_reset() or similar is called, leading to a beacon config call, in parallel with the last VAP being destroyed. This likely should be fixed by making sure the bmiss/bstuck/watchdog taskqueues are canceled whenever the last VAP is destroyed.
906 lines
26 KiB
C
906 lines
26 KiB
C
/*-
|
|
* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
|
|
* redistribution must be conditioned upon including a substantially
|
|
* similar Disclaimer requirement for further binary redistribution.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
|
|
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
|
|
* THE POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* Driver for the Atheros Wireless LAN controller.
|
|
*
|
|
* This software is derived from work of Atsushi Onoe; his contribution
|
|
* is greatly appreciated.
|
|
*/
|
|
|
|
#include "opt_inet.h"
|
|
#include "opt_ath.h"
|
|
/*
|
|
* This is needed for register operations which are performed
|
|
* by the driver - eg, calls to ath_hal_gettsf32().
|
|
*
|
|
* It's also required for any AH_DEBUG checks in here, eg the
|
|
* module dependencies.
|
|
*/
|
|
#include "opt_ah.h"
|
|
#include "opt_wlan.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/callout.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/taskqueue.h>
|
|
#include <sys/priv.h>
|
|
#include <sys/module.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/smp.h> /* for mp_ncpus */
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_media.h>
|
|
#include <net/if_types.h>
|
|
#include <net/if_arp.h>
|
|
#include <net/ethernet.h>
|
|
#include <net/if_llc.h>
|
|
|
|
#include <net80211/ieee80211_var.h>
|
|
#include <net80211/ieee80211_regdomain.h>
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
#include <net80211/ieee80211_superg.h>
|
|
#endif
|
|
|
|
#include <net/bpf.h>
|
|
|
|
#ifdef INET
|
|
#include <netinet/in.h>
|
|
#include <netinet/if_ether.h>
|
|
#endif
|
|
|
|
#include <dev/ath/if_athvar.h>
|
|
|
|
#include <dev/ath/if_ath_debug.h>
|
|
#include <dev/ath/if_ath_misc.h>
|
|
#include <dev/ath/if_ath_tx.h>
|
|
#include <dev/ath/if_ath_beacon.h>
|
|
|
|
#ifdef ATH_TX99_DIAG
|
|
#include <dev/ath/ath_tx99/ath_tx99.h>
|
|
#endif
|
|
|
|
/*
|
|
* Setup a h/w transmit queue for beacons.
|
|
*/
|
|
int
|
|
ath_beaconq_setup(struct ath_softc *sc)
|
|
{
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
HAL_TXQ_INFO qi;
|
|
|
|
memset(&qi, 0, sizeof(qi));
|
|
qi.tqi_aifs = HAL_TXQ_USEDEFAULT;
|
|
qi.tqi_cwmin = HAL_TXQ_USEDEFAULT;
|
|
qi.tqi_cwmax = HAL_TXQ_USEDEFAULT;
|
|
/* NB: for dynamic turbo, don't enable any other interrupts */
|
|
qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE;
|
|
if (sc->sc_isedma)
|
|
qi.tqi_qflags |= HAL_TXQ_TXOKINT_ENABLE |
|
|
HAL_TXQ_TXERRINT_ENABLE;
|
|
|
|
return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi);
|
|
}
|
|
|
|
/*
|
|
* Setup the transmit queue parameters for the beacon queue.
|
|
*/
|
|
int
|
|
ath_beaconq_config(struct ath_softc *sc)
|
|
{
|
|
#define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1)
|
|
struct ieee80211com *ic = sc->sc_ifp->if_l2com;
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
HAL_TXQ_INFO qi;
|
|
|
|
ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi);
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
|
|
ic->ic_opmode == IEEE80211_M_MBSS) {
|
|
/*
|
|
* Always burst out beacon and CAB traffic.
|
|
*/
|
|
qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT;
|
|
qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT;
|
|
qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT;
|
|
} else {
|
|
struct wmeParams *wmep =
|
|
&ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE];
|
|
/*
|
|
* Adhoc mode; important thing is to use 2x cwmin.
|
|
*/
|
|
qi.tqi_aifs = wmep->wmep_aifsn;
|
|
qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin);
|
|
qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax);
|
|
}
|
|
|
|
if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) {
|
|
device_printf(sc->sc_dev, "unable to update parameters for "
|
|
"beacon hardware queue!\n");
|
|
return 0;
|
|
} else {
|
|
ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */
|
|
return 1;
|
|
}
|
|
#undef ATH_EXPONENT_TO_VALUE
|
|
}
|
|
|
|
/*
|
|
* Allocate and setup an initial beacon frame.
|
|
*/
|
|
int
|
|
ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ath_vap *avp = ATH_VAP(vap);
|
|
struct ath_buf *bf;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
bf = avp->av_bcbuf;
|
|
DPRINTF(sc, ATH_DEBUG_NODE, "%s: bf_m=%p, bf_node=%p\n",
|
|
__func__, bf->bf_m, bf->bf_node);
|
|
if (bf->bf_m != NULL) {
|
|
bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
|
|
m_freem(bf->bf_m);
|
|
bf->bf_m = NULL;
|
|
}
|
|
if (bf->bf_node != NULL) {
|
|
ieee80211_free_node(bf->bf_node);
|
|
bf->bf_node = NULL;
|
|
}
|
|
|
|
/*
|
|
* NB: the beacon data buffer must be 32-bit aligned;
|
|
* we assume the mbuf routines will return us something
|
|
* with this alignment (perhaps should assert).
|
|
*/
|
|
m = ieee80211_beacon_alloc(ni, &avp->av_boff);
|
|
if (m == NULL) {
|
|
device_printf(sc->sc_dev, "%s: cannot get mbuf\n", __func__);
|
|
sc->sc_stats.ast_be_nombuf++;
|
|
return ENOMEM;
|
|
}
|
|
error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m,
|
|
bf->bf_segs, &bf->bf_nseg,
|
|
BUS_DMA_NOWAIT);
|
|
if (error != 0) {
|
|
device_printf(sc->sc_dev,
|
|
"%s: cannot map mbuf, bus_dmamap_load_mbuf_sg returns %d\n",
|
|
__func__, error);
|
|
m_freem(m);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Calculate a TSF adjustment factor required for staggered
|
|
* beacons. Note that we assume the format of the beacon
|
|
* frame leaves the tstamp field immediately following the
|
|
* header.
|
|
*/
|
|
if (sc->sc_stagbeacons && avp->av_bslot > 0) {
|
|
uint64_t tsfadjust;
|
|
struct ieee80211_frame *wh;
|
|
|
|
/*
|
|
* The beacon interval is in TU's; the TSF is in usecs.
|
|
* We figure out how many TU's to add to align the timestamp
|
|
* then convert to TSF units and handle byte swapping before
|
|
* inserting it in the frame. The hardware will then add this
|
|
* each time a beacon frame is sent. Note that we align vap's
|
|
* 1..N and leave vap 0 untouched. This means vap 0 has a
|
|
* timestamp in one beacon interval while the others get a
|
|
* timstamp aligned to the next interval.
|
|
*/
|
|
tsfadjust = ni->ni_intval *
|
|
(ATH_BCBUF - avp->av_bslot) / ATH_BCBUF;
|
|
tsfadjust = htole64(tsfadjust << 10); /* TU -> TSF */
|
|
|
|
DPRINTF(sc, ATH_DEBUG_BEACON,
|
|
"%s: %s beacons bslot %d intval %u tsfadjust %llu\n",
|
|
__func__, sc->sc_stagbeacons ? "stagger" : "burst",
|
|
avp->av_bslot, ni->ni_intval,
|
|
(long long unsigned) le64toh(tsfadjust));
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
memcpy(&wh[1], &tsfadjust, sizeof(tsfadjust));
|
|
}
|
|
bf->bf_m = m;
|
|
bf->bf_node = ieee80211_ref_node(ni);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Setup the beacon frame for transmit.
|
|
*/
|
|
static void
|
|
ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf)
|
|
{
|
|
#define USE_SHPREAMBLE(_ic) \
|
|
(((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\
|
|
== IEEE80211_F_SHPREAMBLE)
|
|
struct ieee80211_node *ni = bf->bf_node;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct mbuf *m = bf->bf_m;
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
struct ath_desc *ds;
|
|
int flags, antenna;
|
|
const HAL_RATE_TABLE *rt;
|
|
u_int8_t rix, rate;
|
|
HAL_DMA_ADDR bufAddrList[4];
|
|
uint32_t segLenList[4];
|
|
HAL_11N_RATE_SERIES rc[4];
|
|
|
|
DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: m %p len %u\n",
|
|
__func__, m, m->m_len);
|
|
|
|
/* setup descriptors */
|
|
ds = bf->bf_desc;
|
|
bf->bf_last = bf;
|
|
bf->bf_lastds = ds;
|
|
|
|
flags = HAL_TXDESC_NOACK;
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) {
|
|
/* self-linked descriptor */
|
|
ath_hal_settxdesclink(sc->sc_ah, ds, bf->bf_daddr);
|
|
flags |= HAL_TXDESC_VEOL;
|
|
/*
|
|
* Let hardware handle antenna switching.
|
|
*/
|
|
antenna = sc->sc_txantenna;
|
|
} else {
|
|
ath_hal_settxdesclink(sc->sc_ah, ds, 0);
|
|
/*
|
|
* Switch antenna every 4 beacons.
|
|
* XXX assumes two antenna
|
|
*/
|
|
if (sc->sc_txantenna != 0)
|
|
antenna = sc->sc_txantenna;
|
|
else if (sc->sc_stagbeacons && sc->sc_nbcnvaps != 0)
|
|
antenna = ((sc->sc_stats.ast_be_xmit / sc->sc_nbcnvaps) & 4 ? 2 : 1);
|
|
else
|
|
antenna = (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1);
|
|
}
|
|
|
|
KASSERT(bf->bf_nseg == 1,
|
|
("multi-segment beacon frame; nseg %u", bf->bf_nseg));
|
|
|
|
/*
|
|
* Calculate rate code.
|
|
* XXX everything at min xmit rate
|
|
*/
|
|
rix = 0;
|
|
rt = sc->sc_currates;
|
|
rate = rt->info[rix].rateCode;
|
|
if (USE_SHPREAMBLE(ic))
|
|
rate |= rt->info[rix].shortPreamble;
|
|
ath_hal_setuptxdesc(ah, ds
|
|
, m->m_len + IEEE80211_CRC_LEN /* frame length */
|
|
, sizeof(struct ieee80211_frame)/* header length */
|
|
, HAL_PKT_TYPE_BEACON /* Atheros packet type */
|
|
, ni->ni_txpower /* txpower XXX */
|
|
, rate, 1 /* series 0 rate/tries */
|
|
, HAL_TXKEYIX_INVALID /* no encryption */
|
|
, antenna /* antenna mode */
|
|
, flags /* no ack, veol for beacons */
|
|
, 0 /* rts/cts rate */
|
|
, 0 /* rts/cts duration */
|
|
);
|
|
|
|
/*
|
|
* The EDMA HAL currently assumes that _all_ rate control
|
|
* settings are done in ath_hal_set11nratescenario(), rather
|
|
* than in ath_hal_setuptxdesc().
|
|
*/
|
|
if (sc->sc_isedma) {
|
|
memset(&rc, 0, sizeof(rc));
|
|
|
|
rc[0].ChSel = sc->sc_txchainmask;
|
|
rc[0].Tries = 1;
|
|
rc[0].Rate = rt->info[rix].rateCode;
|
|
rc[0].RateIndex = rix;
|
|
rc[0].tx_power_cap = 0x3f;
|
|
rc[0].PktDuration =
|
|
ath_hal_computetxtime(ah, rt, roundup(m->m_len, 4),
|
|
rix, 0);
|
|
ath_hal_set11nratescenario(ah, ds, 0, 0, rc, 4, flags);
|
|
}
|
|
|
|
/* NB: beacon's BufLen must be a multiple of 4 bytes */
|
|
segLenList[0] = roundup(m->m_len, 4);
|
|
segLenList[1] = segLenList[2] = segLenList[3] = 0;
|
|
bufAddrList[0] = bf->bf_segs[0].ds_addr;
|
|
bufAddrList[1] = bufAddrList[2] = bufAddrList[3] = 0;
|
|
ath_hal_filltxdesc(ah, ds
|
|
, bufAddrList
|
|
, segLenList
|
|
, 0 /* XXX desc id */
|
|
, sc->sc_bhalq /* hardware TXQ */
|
|
, AH_TRUE /* first segment */
|
|
, AH_TRUE /* last segment */
|
|
, ds /* first descriptor */
|
|
);
|
|
#if 0
|
|
ath_desc_swap(ds);
|
|
#endif
|
|
#undef USE_SHPREAMBLE
|
|
}
|
|
|
|
void
|
|
ath_beacon_update(struct ieee80211vap *vap, int item)
|
|
{
|
|
struct ieee80211_beacon_offsets *bo = &ATH_VAP(vap)->av_boff;
|
|
|
|
setbit(bo->bo_flags, item);
|
|
}
|
|
|
|
/*
|
|
* Transmit a beacon frame at SWBA. Dynamic updates to the
|
|
* frame contents are done as needed and the slot time is
|
|
* also adjusted based on current state.
|
|
*/
|
|
void
|
|
ath_beacon_proc(void *arg, int pending)
|
|
{
|
|
struct ath_softc *sc = arg;
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
struct ieee80211vap *vap;
|
|
struct ath_buf *bf;
|
|
int slot, otherant;
|
|
uint32_t bfaddr;
|
|
|
|
DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n",
|
|
__func__, pending);
|
|
/*
|
|
* Check if the previous beacon has gone out. If
|
|
* not don't try to post another, skip this period
|
|
* and wait for the next. Missed beacons indicate
|
|
* a problem and should not occur. If we miss too
|
|
* many consecutive beacons reset the device.
|
|
*/
|
|
if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) {
|
|
sc->sc_bmisscount++;
|
|
sc->sc_stats.ast_be_missed++;
|
|
DPRINTF(sc, ATH_DEBUG_BEACON,
|
|
"%s: missed %u consecutive beacons\n",
|
|
__func__, sc->sc_bmisscount);
|
|
if (sc->sc_bmisscount >= ath_bstuck_threshold)
|
|
taskqueue_enqueue(sc->sc_tq, &sc->sc_bstucktask);
|
|
return;
|
|
}
|
|
if (sc->sc_bmisscount != 0) {
|
|
DPRINTF(sc, ATH_DEBUG_BEACON,
|
|
"%s: resume beacon xmit after %u misses\n",
|
|
__func__, sc->sc_bmisscount);
|
|
sc->sc_bmisscount = 0;
|
|
}
|
|
|
|
if (sc->sc_stagbeacons) { /* staggered beacons */
|
|
struct ieee80211com *ic = sc->sc_ifp->if_l2com;
|
|
uint32_t tsftu;
|
|
|
|
tsftu = ath_hal_gettsf32(ah) >> 10;
|
|
/* XXX lintval */
|
|
slot = ((tsftu % ic->ic_lintval) * ATH_BCBUF) / ic->ic_lintval;
|
|
vap = sc->sc_bslot[(slot+1) % ATH_BCBUF];
|
|
bfaddr = 0;
|
|
if (vap != NULL && vap->iv_state >= IEEE80211_S_RUN) {
|
|
bf = ath_beacon_generate(sc, vap);
|
|
if (bf != NULL)
|
|
bfaddr = bf->bf_daddr;
|
|
}
|
|
} else { /* burst'd beacons */
|
|
uint32_t *bflink = &bfaddr;
|
|
|
|
for (slot = 0; slot < ATH_BCBUF; slot++) {
|
|
vap = sc->sc_bslot[slot];
|
|
if (vap != NULL && vap->iv_state >= IEEE80211_S_RUN) {
|
|
bf = ath_beacon_generate(sc, vap);
|
|
if (bf != NULL) {
|
|
/* XXX should do this using the ds */
|
|
*bflink = bf->bf_daddr;
|
|
ath_hal_gettxdesclinkptr(sc->sc_ah,
|
|
bf->bf_desc, &bflink);
|
|
}
|
|
}
|
|
}
|
|
*bflink = 0; /* terminate list */
|
|
}
|
|
|
|
/*
|
|
* Handle slot time change when a non-ERP station joins/leaves
|
|
* an 11g network. The 802.11 layer notifies us via callback,
|
|
* we mark updateslot, then wait one beacon before effecting
|
|
* the change. This gives associated stations at least one
|
|
* beacon interval to note the state change.
|
|
*/
|
|
/* XXX locking */
|
|
if (sc->sc_updateslot == UPDATE) {
|
|
sc->sc_updateslot = COMMIT; /* commit next beacon */
|
|
sc->sc_slotupdate = slot;
|
|
} else if (sc->sc_updateslot == COMMIT && sc->sc_slotupdate == slot)
|
|
ath_setslottime(sc); /* commit change to h/w */
|
|
|
|
/*
|
|
* Check recent per-antenna transmit statistics and flip
|
|
* the default antenna if noticeably more frames went out
|
|
* on the non-default antenna.
|
|
* XXX assumes 2 anntenae
|
|
*/
|
|
if (!sc->sc_diversity && (!sc->sc_stagbeacons || slot == 0)) {
|
|
otherant = sc->sc_defant & 1 ? 2 : 1;
|
|
if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2)
|
|
ath_setdefantenna(sc, otherant);
|
|
sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0;
|
|
}
|
|
|
|
if (bfaddr != 0) {
|
|
/*
|
|
* Stop any current dma and put the new frame on the queue.
|
|
* This should never fail since we check above that no frames
|
|
* are still pending on the queue.
|
|
*/
|
|
if (! sc->sc_isedma) {
|
|
if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) {
|
|
DPRINTF(sc, ATH_DEBUG_ANY,
|
|
"%s: beacon queue %u did not stop?\n",
|
|
__func__, sc->sc_bhalq);
|
|
}
|
|
}
|
|
/* NB: cabq traffic should already be queued and primed */
|
|
|
|
ath_hal_puttxbuf(ah, sc->sc_bhalq, bfaddr);
|
|
ath_hal_txstart(ah, sc->sc_bhalq);
|
|
|
|
sc->sc_stats.ast_be_xmit++;
|
|
}
|
|
}
|
|
|
|
struct ath_buf *
|
|
ath_beacon_generate(struct ath_softc *sc, struct ieee80211vap *vap)
|
|
{
|
|
struct ath_vap *avp = ATH_VAP(vap);
|
|
struct ath_txq *cabq = sc->sc_cabq;
|
|
struct ath_buf *bf;
|
|
struct mbuf *m;
|
|
int nmcastq, error;
|
|
|
|
KASSERT(vap->iv_state >= IEEE80211_S_RUN,
|
|
("not running, state %d", vap->iv_state));
|
|
KASSERT(avp->av_bcbuf != NULL, ("no beacon buffer"));
|
|
|
|
/*
|
|
* Update dynamic beacon contents. If this returns
|
|
* non-zero then we need to remap the memory because
|
|
* the beacon frame changed size (probably because
|
|
* of the TIM bitmap).
|
|
*/
|
|
bf = avp->av_bcbuf;
|
|
m = bf->bf_m;
|
|
/* XXX lock mcastq? */
|
|
nmcastq = avp->av_mcastq.axq_depth;
|
|
|
|
if (ieee80211_beacon_update(bf->bf_node, &avp->av_boff, m, nmcastq)) {
|
|
/* XXX too conservative? */
|
|
bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
|
|
error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m,
|
|
bf->bf_segs, &bf->bf_nseg,
|
|
BUS_DMA_NOWAIT);
|
|
if (error != 0) {
|
|
if_printf(vap->iv_ifp,
|
|
"%s: bus_dmamap_load_mbuf_sg failed, error %u\n",
|
|
__func__, error);
|
|
return NULL;
|
|
}
|
|
}
|
|
if ((avp->av_boff.bo_tim[4] & 1) && cabq->axq_depth) {
|
|
DPRINTF(sc, ATH_DEBUG_BEACON,
|
|
"%s: cabq did not drain, mcastq %u cabq %u\n",
|
|
__func__, nmcastq, cabq->axq_depth);
|
|
sc->sc_stats.ast_cabq_busy++;
|
|
if (sc->sc_nvaps > 1 && sc->sc_stagbeacons) {
|
|
/*
|
|
* CABQ traffic from a previous vap is still pending.
|
|
* We must drain the q before this beacon frame goes
|
|
* out as otherwise this vap's stations will get cab
|
|
* frames from a different vap.
|
|
* XXX could be slow causing us to miss DBA
|
|
*/
|
|
ath_tx_draintxq(sc, cabq);
|
|
}
|
|
}
|
|
ath_beacon_setup(sc, bf);
|
|
bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
|
|
|
|
/*
|
|
* Enable the CAB queue before the beacon queue to
|
|
* insure cab frames are triggered by this beacon.
|
|
*/
|
|
if (avp->av_boff.bo_tim[4] & 1) {
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
|
|
/* NB: only at DTIM */
|
|
ATH_TX_LOCK(sc);
|
|
if (nmcastq) {
|
|
struct ath_buf *bfm;
|
|
|
|
/*
|
|
* Move frames from the s/w mcast q to the h/w cab q.
|
|
* XXX MORE_DATA bit
|
|
*/
|
|
bfm = TAILQ_FIRST(&avp->av_mcastq.axq_q);
|
|
if (cabq->axq_link != NULL) {
|
|
*cabq->axq_link = bfm->bf_daddr;
|
|
} else
|
|
ath_hal_puttxbuf(ah, cabq->axq_qnum,
|
|
bfm->bf_daddr);
|
|
ath_txqmove(cabq, &avp->av_mcastq);
|
|
|
|
sc->sc_stats.ast_cabq_xmit += nmcastq;
|
|
}
|
|
/* NB: gated by beacon so safe to start here */
|
|
if (! TAILQ_EMPTY(&(cabq->axq_q)))
|
|
ath_hal_txstart(ah, cabq->axq_qnum);
|
|
ATH_TX_UNLOCK(sc);
|
|
}
|
|
return bf;
|
|
}
|
|
|
|
void
|
|
ath_beacon_start_adhoc(struct ath_softc *sc, struct ieee80211vap *vap)
|
|
{
|
|
struct ath_vap *avp = ATH_VAP(vap);
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
struct ath_buf *bf;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
KASSERT(avp->av_bcbuf != NULL, ("no beacon buffer"));
|
|
|
|
/*
|
|
* Update dynamic beacon contents. If this returns
|
|
* non-zero then we need to remap the memory because
|
|
* the beacon frame changed size (probably because
|
|
* of the TIM bitmap).
|
|
*/
|
|
bf = avp->av_bcbuf;
|
|
m = bf->bf_m;
|
|
if (ieee80211_beacon_update(bf->bf_node, &avp->av_boff, m, 0)) {
|
|
/* XXX too conservative? */
|
|
bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
|
|
error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m,
|
|
bf->bf_segs, &bf->bf_nseg,
|
|
BUS_DMA_NOWAIT);
|
|
if (error != 0) {
|
|
if_printf(vap->iv_ifp,
|
|
"%s: bus_dmamap_load_mbuf_sg failed, error %u\n",
|
|
__func__, error);
|
|
return;
|
|
}
|
|
}
|
|
ath_beacon_setup(sc, bf);
|
|
bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
|
|
|
|
/* NB: caller is known to have already stopped tx dma */
|
|
ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr);
|
|
ath_hal_txstart(ah, sc->sc_bhalq);
|
|
}
|
|
|
|
/*
|
|
* Reclaim beacon resources and return buffer to the pool.
|
|
*/
|
|
void
|
|
ath_beacon_return(struct ath_softc *sc, struct ath_buf *bf)
|
|
{
|
|
|
|
DPRINTF(sc, ATH_DEBUG_NODE, "%s: free bf=%p, bf_m=%p, bf_node=%p\n",
|
|
__func__, bf, bf->bf_m, bf->bf_node);
|
|
if (bf->bf_m != NULL) {
|
|
bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
|
|
m_freem(bf->bf_m);
|
|
bf->bf_m = NULL;
|
|
}
|
|
if (bf->bf_node != NULL) {
|
|
ieee80211_free_node(bf->bf_node);
|
|
bf->bf_node = NULL;
|
|
}
|
|
TAILQ_INSERT_TAIL(&sc->sc_bbuf, bf, bf_list);
|
|
}
|
|
|
|
/*
|
|
* Reclaim beacon resources.
|
|
*/
|
|
void
|
|
ath_beacon_free(struct ath_softc *sc)
|
|
{
|
|
struct ath_buf *bf;
|
|
|
|
TAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) {
|
|
DPRINTF(sc, ATH_DEBUG_NODE,
|
|
"%s: free bf=%p, bf_m=%p, bf_node=%p\n",
|
|
__func__, bf, bf->bf_m, bf->bf_node);
|
|
if (bf->bf_m != NULL) {
|
|
bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
|
|
m_freem(bf->bf_m);
|
|
bf->bf_m = NULL;
|
|
}
|
|
if (bf->bf_node != NULL) {
|
|
ieee80211_free_node(bf->bf_node);
|
|
bf->bf_node = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Configure the beacon and sleep timers.
|
|
*
|
|
* When operating as an AP this resets the TSF and sets
|
|
* up the hardware to notify us when we need to issue beacons.
|
|
*
|
|
* When operating in station mode this sets up the beacon
|
|
* timers according to the timestamp of the last received
|
|
* beacon and the current TSF, configures PCF and DTIM
|
|
* handling, programs the sleep registers so the hardware
|
|
* will wakeup in time to receive beacons, and configures
|
|
* the beacon miss handling so we'll receive a BMISS
|
|
* interrupt when we stop seeing beacons from the AP
|
|
* we've associated with.
|
|
*/
|
|
void
|
|
ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap)
|
|
{
|
|
#define TSF_TO_TU(_h,_l) \
|
|
((((u_int32_t)(_h)) << 22) | (((u_int32_t)(_l)) >> 10))
|
|
#define FUDGE 2
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
struct ieee80211com *ic = sc->sc_ifp->if_l2com;
|
|
struct ieee80211_node *ni;
|
|
u_int32_t nexttbtt, intval, tsftu;
|
|
u_int32_t nexttbtt_u8, intval_u8;
|
|
u_int64_t tsf;
|
|
|
|
if (vap == NULL)
|
|
vap = TAILQ_FIRST(&ic->ic_vaps); /* XXX */
|
|
/*
|
|
* Just ensure that we aren't being called when the last
|
|
* VAP is destroyed.
|
|
*/
|
|
if (vap == NULL) {
|
|
device_printf(sc->sc_dev, "%s: called with no VAPs\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
|
|
ni = ieee80211_ref_node(vap->iv_bss);
|
|
|
|
/* extract tstamp from last beacon and convert to TU */
|
|
nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4),
|
|
LE_READ_4(ni->ni_tstamp.data));
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
|
|
ic->ic_opmode == IEEE80211_M_MBSS) {
|
|
/*
|
|
* For multi-bss ap/mesh support beacons are either staggered
|
|
* evenly over N slots or burst together. For the former
|
|
* arrange for the SWBA to be delivered for each slot.
|
|
* Slots that are not occupied will generate nothing.
|
|
*/
|
|
/* NB: the beacon interval is kept internally in TU's */
|
|
intval = ni->ni_intval & HAL_BEACON_PERIOD;
|
|
if (sc->sc_stagbeacons)
|
|
intval /= ATH_BCBUF;
|
|
} else {
|
|
/* NB: the beacon interval is kept internally in TU's */
|
|
intval = ni->ni_intval & HAL_BEACON_PERIOD;
|
|
}
|
|
if (nexttbtt == 0) /* e.g. for ap mode */
|
|
nexttbtt = intval;
|
|
else if (intval) /* NB: can be 0 for monitor mode */
|
|
nexttbtt = roundup(nexttbtt, intval);
|
|
DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n",
|
|
__func__, nexttbtt, intval, ni->ni_intval);
|
|
if (ic->ic_opmode == IEEE80211_M_STA && !sc->sc_swbmiss) {
|
|
HAL_BEACON_STATE bs;
|
|
int dtimperiod, dtimcount;
|
|
int cfpperiod, cfpcount;
|
|
|
|
/*
|
|
* Setup dtim and cfp parameters according to
|
|
* last beacon we received (which may be none).
|
|
*/
|
|
dtimperiod = ni->ni_dtim_period;
|
|
if (dtimperiod <= 0) /* NB: 0 if not known */
|
|
dtimperiod = 1;
|
|
dtimcount = ni->ni_dtim_count;
|
|
if (dtimcount >= dtimperiod) /* NB: sanity check */
|
|
dtimcount = 0; /* XXX? */
|
|
cfpperiod = 1; /* NB: no PCF support yet */
|
|
cfpcount = 0;
|
|
/*
|
|
* Pull nexttbtt forward to reflect the current
|
|
* TSF and calculate dtim+cfp state for the result.
|
|
*/
|
|
tsf = ath_hal_gettsf64(ah);
|
|
tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
|
|
do {
|
|
nexttbtt += intval;
|
|
if (--dtimcount < 0) {
|
|
dtimcount = dtimperiod - 1;
|
|
if (--cfpcount < 0)
|
|
cfpcount = cfpperiod - 1;
|
|
}
|
|
} while (nexttbtt < tsftu);
|
|
memset(&bs, 0, sizeof(bs));
|
|
bs.bs_intval = intval;
|
|
bs.bs_nexttbtt = nexttbtt;
|
|
bs.bs_dtimperiod = dtimperiod*intval;
|
|
bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
|
|
bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
|
|
bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
|
|
bs.bs_cfpmaxduration = 0;
|
|
#if 0
|
|
/*
|
|
* The 802.11 layer records the offset to the DTIM
|
|
* bitmap while receiving beacons; use it here to
|
|
* enable h/w detection of our AID being marked in
|
|
* the bitmap vector (to indicate frames for us are
|
|
* pending at the AP).
|
|
* XXX do DTIM handling in s/w to WAR old h/w bugs
|
|
* XXX enable based on h/w rev for newer chips
|
|
*/
|
|
bs.bs_timoffset = ni->ni_timoff;
|
|
#endif
|
|
/*
|
|
* Calculate the number of consecutive beacons to miss
|
|
* before taking a BMISS interrupt.
|
|
* Note that we clamp the result to at most 10 beacons.
|
|
*/
|
|
bs.bs_bmissthreshold = vap->iv_bmissthreshold;
|
|
if (bs.bs_bmissthreshold > 10)
|
|
bs.bs_bmissthreshold = 10;
|
|
else if (bs.bs_bmissthreshold <= 0)
|
|
bs.bs_bmissthreshold = 1;
|
|
|
|
/*
|
|
* Calculate sleep duration. The configuration is
|
|
* given in ms. We insure a multiple of the beacon
|
|
* period is used. Also, if the sleep duration is
|
|
* greater than the DTIM period then it makes senses
|
|
* to make it a multiple of that.
|
|
*
|
|
* XXX fixed at 100ms
|
|
*/
|
|
bs.bs_sleepduration =
|
|
roundup(IEEE80211_MS_TO_TU(100), bs.bs_intval);
|
|
if (bs.bs_sleepduration > bs.bs_dtimperiod)
|
|
bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod);
|
|
|
|
DPRINTF(sc, ATH_DEBUG_BEACON,
|
|
"%s: tsf %ju tsf:tu %u intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n"
|
|
, __func__
|
|
, tsf, tsftu
|
|
, bs.bs_intval
|
|
, bs.bs_nexttbtt
|
|
, bs.bs_dtimperiod
|
|
, bs.bs_nextdtim
|
|
, bs.bs_bmissthreshold
|
|
, bs.bs_sleepduration
|
|
, bs.bs_cfpperiod
|
|
, bs.bs_cfpmaxduration
|
|
, bs.bs_cfpnext
|
|
, bs.bs_timoffset
|
|
);
|
|
ath_hal_intrset(ah, 0);
|
|
ath_hal_beacontimers(ah, &bs);
|
|
sc->sc_imask |= HAL_INT_BMISS;
|
|
ath_hal_intrset(ah, sc->sc_imask);
|
|
} else {
|
|
ath_hal_intrset(ah, 0);
|
|
if (nexttbtt == intval)
|
|
intval |= HAL_BEACON_RESET_TSF;
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS) {
|
|
/*
|
|
* In IBSS mode enable the beacon timers but only
|
|
* enable SWBA interrupts if we need to manually
|
|
* prepare beacon frames. Otherwise we use a
|
|
* self-linked tx descriptor and let the hardware
|
|
* deal with things.
|
|
*/
|
|
intval |= HAL_BEACON_ENA;
|
|
if (!sc->sc_hasveol)
|
|
sc->sc_imask |= HAL_INT_SWBA;
|
|
if ((intval & HAL_BEACON_RESET_TSF) == 0) {
|
|
/*
|
|
* Pull nexttbtt forward to reflect
|
|
* the current TSF.
|
|
*/
|
|
tsf = ath_hal_gettsf64(ah);
|
|
tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
|
|
do {
|
|
nexttbtt += intval;
|
|
} while (nexttbtt < tsftu);
|
|
}
|
|
ath_beaconq_config(sc);
|
|
} else if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
|
|
ic->ic_opmode == IEEE80211_M_MBSS) {
|
|
/*
|
|
* In AP/mesh mode we enable the beacon timers
|
|
* and SWBA interrupts to prepare beacon frames.
|
|
*/
|
|
intval |= HAL_BEACON_ENA;
|
|
sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */
|
|
ath_beaconq_config(sc);
|
|
}
|
|
|
|
/*
|
|
* Now dirty things because for now, the EDMA HAL has
|
|
* nexttbtt and intval is TU/8.
|
|
*/
|
|
if (sc->sc_isedma) {
|
|
nexttbtt_u8 = (nexttbtt << 3);
|
|
intval_u8 = (intval << 3);
|
|
if (intval & HAL_BEACON_ENA)
|
|
intval_u8 |= HAL_BEACON_ENA;
|
|
if (intval & HAL_BEACON_RESET_TSF)
|
|
intval_u8 |= HAL_BEACON_RESET_TSF;
|
|
ath_hal_beaconinit(ah, nexttbtt_u8, intval_u8);
|
|
} else
|
|
ath_hal_beaconinit(ah, nexttbtt, intval);
|
|
sc->sc_bmisscount = 0;
|
|
ath_hal_intrset(ah, sc->sc_imask);
|
|
/*
|
|
* When using a self-linked beacon descriptor in
|
|
* ibss mode load it once here.
|
|
*/
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol)
|
|
ath_beacon_start_adhoc(sc, vap);
|
|
}
|
|
sc->sc_syncbeacon = 0;
|
|
ieee80211_free_node(ni);
|
|
#undef FUDGE
|
|
#undef TSF_TO_TU
|
|
}
|