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ath9k: Add channel context structure 

The channel context structure is defined to enable
multi-channel concurrency support.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2014-06-11 16:17:49 +05:30 committed by John W. Linville
parent 6437f51ec3
commit fbbcd14690
7 changed files with 169 additions and 103 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/ath/ath9k/Makefile
View File

@ -5,7 +5,8 @@ ath9k-y += beacon.o \
recv.o \
xmit.o \
link.o \
antenna.o
antenna.o \
channel.o
ath9k-$(CONFIG_ATH9K_BTCOEX_SUPPORT) += mci.o
ath9k-$(CONFIG_ATH9K_PCI) += pci.o

18
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -325,6 +325,16 @@ struct ath_rx {
u32 ampdu_ref;
};
struct ath_chanctx {
struct cfg80211_chan_def chandef;
struct list_head vifs;
bool offchannel;
};
void ath_chanctx_init(struct ath_softc *sc);
int ath_chanctx_set_channel(struct ath_softc *sc, struct ath_chanctx *ctx,
struct cfg80211_chan_def *chandef);
int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan);
int ath_startrecv(struct ath_softc *sc);
bool ath_stoprecv(struct ath_softc *sc);
u32 ath_calcrxfilter(struct ath_softc *sc);
@ -370,12 +380,15 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
/********/
struct ath_vif {
struct list_head list;
struct ieee80211_vif *vif;
struct ath_node mcast_node;
int av_bslot;
bool primary_sta_vif;
__le64 tsf_adjust; /* TSF adjustment for staggered beacons */
struct ath_buf *av_bcbuf;
struct ath_chanctx *chanctx;
/* P2P Client */
struct ieee80211_noa_data noa;
@ -702,6 +715,8 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs);
#define PS_BEACON_SYNC BIT(4)
#define PS_WAIT_FOR_ANI BIT(5)
#define ATH9K_NUM_CHANCTX 2 /* supports 2 operating channels */
struct ath_softc {
struct ieee80211_hw *hw;
struct device *dev;
@ -743,6 +758,9 @@ struct ath_softc {
struct ath_tx tx;
struct ath_beacon beacon;
struct ath_chanctx chanctx[ATH9K_NUM_CHANCTX];
struct ath_chanctx *cur_chan;
#ifdef CONFIG_MAC80211_LEDS
bool led_registered;
char led_name[32];

133
drivers/net/wireless/ath/ath9k/channel.c Normal file
View File

@ -0,0 +1,133 @@
/*
* Copyright (c) 2014 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "ath9k.h"
/* Set/change channels. If the channel is really being changed, it's done
* by reseting the chip. To accomplish this we must first cleanup any pending
* DMA, then restart stuff.
*/
static int ath_set_channel(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
struct ath9k_channel *hchan;
struct cfg80211_chan_def *chandef = &sc->cur_chan->chandef;
struct ieee80211_channel *chan = chandef->chan;
int pos = chan->hw_value;
int old_pos = -1;
int r;
if (test_bit(ATH_OP_INVALID, &common->op_flags))
return -EIO;
if (ah->curchan)
old_pos = ah->curchan - &ah->channels[0];
ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n",
chan->center_freq, chandef->width);
/* update survey stats for the old channel before switching */
spin_lock_bh(&common->cc_lock);
ath_update_survey_stats(sc);
spin_unlock_bh(&common->cc_lock);
ath9k_cmn_get_channel(hw, ah, chandef);
/* If the operating channel changes, change the survey in-use flags
* along with it.
* Reset the survey data for the new channel, unless we're switching
* back to the operating channel from an off-channel operation.
*/
if (!sc->cur_chan->offchannel && sc->cur_survey != &sc->survey[pos]) {
if (sc->cur_survey)
sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
sc->cur_survey = &sc->survey[pos];
memset(sc->cur_survey, 0, sizeof(struct survey_info));
sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
} else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
memset(&sc->survey[pos], 0, sizeof(struct survey_info));
}
hchan = &sc->sc_ah->channels[pos];
r = ath_reset_internal(sc, hchan);
if (r)
return r;
/* The most recent snapshot of channel->noisefloor for the old
* channel is only available after the hardware reset. Copy it to
* the survey stats now.
*/
if (old_pos >= 0)
ath_update_survey_nf(sc, old_pos);
/* Enable radar pulse detection if on a DFS channel. Spectral
* scanning and radar detection can not be used concurrently.
*/
if (hw->conf.radar_enabled) {
u32 rxfilter;
/* set HW specific DFS configuration */
ath9k_hw_set_radar_params(ah);
rxfilter = ath9k_hw_getrxfilter(ah);
rxfilter |= ATH9K_RX_FILTER_PHYRADAR |
ATH9K_RX_FILTER_PHYERR;
ath9k_hw_setrxfilter(ah, rxfilter);
ath_dbg(common, DFS, "DFS enabled at freq %d\n",
chan->center_freq);
} else {
/* perform spectral scan if requested. */
if (test_bit(ATH_OP_SCANNING, &common->op_flags) &&
sc->spectral_mode == SPECTRAL_CHANSCAN)
ath9k_spectral_scan_trigger(hw);
}
return 0;
}
void ath_chanctx_init(struct ath_softc *sc)
{
struct ath_chanctx *ctx;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_supported_band *sband;
struct ieee80211_channel *chan;
int i;
sband = &common->sbands[IEEE80211_BAND_2GHZ];
if (!sband->n_channels)
sband = &common->sbands[IEEE80211_BAND_5GHZ];
chan = &sband->channels[0];
for (i = 0; i < ATH9K_NUM_CHANCTX; i++) {
ctx = &sc->chanctx[i];
cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20);
INIT_LIST_HEAD(&ctx->vifs);
}
sc->cur_chan = &sc->chanctx[0];
}
int ath_chanctx_set_channel(struct ath_softc *sc, struct ath_chanctx *ctx,
struct cfg80211_chan_def *chandef)
{
memcpy(&ctx->chandef, chandef, sizeof(ctx->chandef));
if (ctx != sc->cur_chan)
return 0;
return ath_set_channel(sc);
}

1
drivers/net/wireless/ath/ath9k/init.c
View File

@ -599,6 +599,7 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
ath9k_cmn_init_crypto(sc->sc_ah);
ath9k_init_misc(sc);
ath_fill_led_pin(sc);
ath_chanctx_init(sc);
if (common->bus_ops->aspm_init)
common->bus_ops->aspm_init(common);

2
drivers/net/wireless/ath/ath9k/link.c
View File

@ -416,7 +416,7 @@ void ath_start_ani(struct ath_softc *sc)
if (common->disable_ani ||
!test_bit(ATH_OP_ANI_RUN, &common->op_flags) ||
(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL))
sc->cur_chan->offchannel)
return;
common->ani.longcal_timer = timestamp;

111
drivers/net/wireless/ath/ath9k/main.c
View File

@ -233,7 +233,7 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
if (!sc->cur_chan->offchannel && start) {
if (!test_bit(ATH_OP_BEACONS, &common->op_flags))
goto work;
@ -266,7 +266,7 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
return true;
}
static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
@ -279,7 +279,7 @@ static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
tasklet_disable(&sc->intr_tq);
spin_lock_bh(&sc->sc_pcu_lock);
if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
if (!sc->cur_chan->offchannel) {
fastcc = false;
caldata = &sc->caldata;
}
@ -307,7 +307,7 @@ static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
}
if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL))
sc->cur_chan->offchannel)
ath9k_mci_set_txpower(sc, true, false);
if (!ath_complete_reset(sc, true))
@ -320,98 +320,6 @@ static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
return r;
}
/*
* Set/change channels. If the channel is really being changed, it's done
* by reseting the chip. To accomplish this we must first cleanup any pending
* DMA, then restart stuff.
*/
static int ath_set_channel(struct ath_softc *sc, struct cfg80211_chan_def *chandef)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
struct ath9k_channel *hchan;
struct ieee80211_channel *chan = chandef->chan;
bool offchannel;
int pos = chan->hw_value;
int old_pos = -1;
int r;
if (test_bit(ATH_OP_INVALID, &common->op_flags))
return -EIO;
offchannel = !!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL);
if (ah->curchan)
old_pos = ah->curchan - &ah->channels[0];
ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n",
chan->center_freq, chandef->width);
/* update survey stats for the old channel before switching */
spin_lock_bh(&common->cc_lock);
ath_update_survey_stats(sc);
spin_unlock_bh(&common->cc_lock);
ath9k_cmn_get_channel(hw, ah, chandef);
/*
* If the operating channel changes, change the survey in-use flags
* along with it.
* Reset the survey data for the new channel, unless we're switching
* back to the operating channel from an off-channel operation.
*/
if (!offchannel && sc->cur_survey != &sc->survey[pos]) {
if (sc->cur_survey)
sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
sc->cur_survey = &sc->survey[pos];
memset(sc->cur_survey, 0, sizeof(struct survey_info));
sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
} else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
memset(&sc->survey[pos], 0, sizeof(struct survey_info));
}
hchan = &sc->sc_ah->channels[pos];
r = ath_reset_internal(sc, hchan);
if (r)
return r;
/*
* The most recent snapshot of channel->noisefloor for the old
* channel is only available after the hardware reset. Copy it to
* the survey stats now.
*/
if (old_pos >= 0)
ath_update_survey_nf(sc, old_pos);
/*
* Enable radar pulse detection if on a DFS channel. Spectral
* scanning and radar detection can not be used concurrently.
*/
if (hw->conf.radar_enabled) {
u32 rxfilter;
/* set HW specific DFS configuration */
ath9k_hw_set_radar_params(ah);
rxfilter = ath9k_hw_getrxfilter(ah);
rxfilter |= ATH9K_RX_FILTER_PHYRADAR |
ATH9K_RX_FILTER_PHYERR;
ath9k_hw_setrxfilter(ah, rxfilter);
ath_dbg(common, DFS, "DFS enabled at freq %d\n",
chan->center_freq);
} else {
/* perform spectral scan if requested. */
if (test_bit(ATH_OP_SCANNING, &common->op_flags) &&
sc->spectral_mode == SPECTRAL_CHANSCAN)
ath9k_spectral_scan_trigger(hw);
}
return 0;
}
static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
struct ieee80211_vif *vif)
{
@ -713,6 +621,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_channel *curchan = hw->conf.chandef.chan;
struct ath_chanctx *ctx = sc->cur_chan;
struct ath9k_channel *init_channel;
int r;
@ -723,7 +632,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
init_channel = ath9k_cmn_get_channel(hw, ah, &hw->conf.chandef);
memcpy(&ctx->chandef, &hw->conf.chandef, sizeof(ctx->chandef));
init_channel = ath9k_cmn_get_channel(hw, ah, &ctx->chandef);
/* Reset SERDES registers */
ath9k_hw_configpcipowersave(ah, false);
@ -934,7 +844,8 @@ static void ath9k_stop(struct ieee80211_hw *hw)
}
if (!ah->curchan)
ah->curchan = ath9k_cmn_get_channel(hw, ah, &hw->conf.chandef);
ah->curchan = ath9k_cmn_get_channel(hw, ah,
&sc->cur_chan->chandef);
ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
ath9k_hw_phy_disable(ah);
@ -1345,6 +1256,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_conf *conf = &hw->conf;
struct ath_chanctx *ctx = sc->cur_chan;
bool reset_channel = false;
ath9k_ps_wakeup(sc);
@ -1392,7 +1304,8 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
}
if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
if (ath_set_channel(sc, &hw->conf.chandef) < 0) {
ctx->offchannel = !!(conf->flags & IEEE80211_CONF_OFFCHANNEL);
if (ath_chanctx_set_channel(sc, ctx, &hw->conf.chandef) < 0) {
ath_err(common, "Unable to set channel\n");
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);

4
drivers/net/wireless/ath/ath9k/recv.c
View File

@ -259,7 +259,7 @@ static void ath_edma_start_recv(struct ath_softc *sc)
ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_HP);
ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_LP);
ath_opmode_init(sc);
ath9k_hw_startpcureceive(sc->sc_ah, !!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL));
ath9k_hw_startpcureceive(sc->sc_ah, sc->cur_chan->offchannel);
}
static void ath_edma_stop_recv(struct ath_softc *sc)
@ -457,7 +457,7 @@ int ath_startrecv(struct ath_softc *sc)
start_recv:
ath_opmode_init(sc);
ath9k_hw_startpcureceive(ah, !!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL));
ath9k_hw_startpcureceive(ah, sc->cur_chan->offchannel);
return 0;
}