The firmware keeps track of channel usage. This data can
be used by the automatic channel selection to find the best
channel.
Survey data from wlan22
frequency: 2412 MHz [in use]
noise: -86 dBm
channel active time: 3339608 ms
channel busy time: 270982 ms
channel transmit time: 121515 ms
Survey data from wlan22
frequency: 2417 MHz
noise: -86 dBm
channel active time: 70 ms
channel busy time: 2 ms
channel transmit time: 1 ms
...
---
diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h
index 20bed04..989fb59 100644
--- a/drivers/net/wireless/ath/carl9170/carl9170.h
+++ b/drivers/net/wireless/ath/carl9170/carl9170.h
@@ -152,6 +152,7 @@ struct carl9170_sta_tid {
#define CARL9170_TX_TIMEOUT 2500
#define CARL9170_JANITOR_DELAY 128
#define CARL9170_QUEUE_STUCK_TIMEOUT 5500
+#define CARL9170_STAT_WORK 30000
#define CARL9170_NUM_TX_AGG_MAX 30
@@ -283,6 +284,7 @@ struct ar9170 {
bool rx_stream;
bool tx_stream;
bool rx_filter;
+ bool hw_counters;
unsigned int mem_blocks;
unsigned int mem_block_size;
unsigned int rx_size;
@@ -332,11 +334,21 @@ struct ar9170 {
/* PHY */
struct ieee80211_channel *channel;
+ unsigned int num_channels;
int noise[4];
unsigned int chan_fail;
unsigned int total_chan_fail;
u8 heavy_clip;
u8 ht_settings;
+ struct {
+ u64 active; /* usec */
+ u64 cca; /* usec */
+ u64 tx_time; /* usec */
+ u64 rx_total;
+ u64 rx_overrun;
+ } tally;
+ struct delayed_work stat_work;
+ struct survey_info *survey;
/* power calibration data */
u8 power_5G_leg[4];
diff --git a/drivers/net/wireless/ath/carl9170/cmd.c b/drivers/net/wireless/ath/carl9170/cmd.c
index cdfc94c..9970bf8 100644
--- a/drivers/net/wireless/ath/carl9170/cmd.c
+++ b/drivers/net/wireless/ath/carl9170/cmd.c
@@ -165,6 +165,37 @@ int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
return __carl9170_exec_cmd(ar, cmd, true);
}
+int carl9170_collect_tally(struct ar9170 *ar)
+{
+ struct carl9170_tally_rsp tally;
+ struct survey_info *info;
+ unsigned int tick;
+ int err;
+
+ err = carl9170_exec_cmd(ar, CARL9170_CMD_TALLY, 0, NULL,
+ sizeof(tally), (u8 *)&tally);
+ if (err)
+ return err;
+
+ tick = le32_to_cpu(tally.tick);
+ if (tick) {
+ ar->tally.active += le32_to_cpu(tally.active) / tick;
+ ar->tally.cca += le32_to_cpu(tally.cca) / tick;
+ ar->tally.tx_time += le32_to_cpu(tally.tx_time) / tick;
+ ar->tally.rx_total += le32_to_cpu(tally.rx_total);
+ ar->tally.rx_overrun += le32_to_cpu(tally.rx_overrun);
+
+ if (ar->channel) {
+ info = &ar->survey[ar->channel->hw_value];
+
+ info->channel_time = ar->tally.active / 1000;
+ info->channel_time_busy = ar->tally.cca / 1000;
+ info->channel_time_tx = ar->tally.tx_time / 1000;
+ }
+ }
+ return 0;
+}
+
int carl9170_powersave(struct ar9170 *ar, const bool ps)
{
struct carl9170_cmd *cmd;
diff --git a/drivers/net/wireless/ath/carl9170/cmd.h b/drivers/net/wireless/ath/carl9170/cmd.h
index 568174c..d0e9ff5 100644
--- a/drivers/net/wireless/ath/carl9170/cmd.h
+++ b/drivers/net/wireless/ath/carl9170/cmd.h
@@ -50,6 +50,7 @@ int carl9170_echo_test(struct ar9170 *ar, u32 v);
int carl9170_reboot(struct ar9170 *ar);
int carl9170_mac_reset(struct ar9170 *ar);
int carl9170_powersave(struct ar9170 *ar, const bool power_on);
+int carl9170_collect_tally(struct ar9170 *ar);
int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
const u32 mode, const u32 addr, const u32 len);
diff --git a/drivers/net/wireless/ath/carl9170/fw.c b/drivers/net/wireless/ath/carl9170/fw.c
index 39ddea5..f4cae1c 100644
--- a/drivers/net/wireless/ath/carl9170/fw.c
+++ b/drivers/net/wireless/ath/carl9170/fw.c
@@ -266,6 +266,9 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
FIF_PROMISC_IN_BSS;
}
+ if (SUPP(CARL9170FW_HW_COUNTERS))
+ ar->fw.hw_counters = true;
+
if (SUPP(CARL9170FW_WOL))
device_set_wakeup_enable(&ar->udev->dev, true);
diff --git a/drivers/net/wireless/ath/carl9170/fwcmd.h b/drivers/net/wireless/ath/carl9170/fwcmd.h
index 8fea629..2bf2d74 100644
--- a/drivers/net/wireless/ath/carl9170/fwcmd.h
+++ b/drivers/net/wireless/ath/carl9170/fwcmd.h
@@ -55,6 +55,7 @@ enum carl9170_cmd_oids {
CARL9170_CMD_READ_TSF = 0x06,
CARL9170_CMD_RX_FILTER = 0x07,
CARL9170_CMD_WOL = 0x08,
+ CARL9170_CMD_TALLY = 0x09,
/* CAM */
CARL9170_CMD_EKEY = 0x10,
@@ -286,6 +287,15 @@ struct carl9170_tsf_rsp {
} __packed;
#define CARL9170_TSF_RSP_SIZE 8
+struct carl9170_tally_rsp {
+ __le32 active;
+ __le32 cca;
+ __le32 tx_time;
+ __le32 rx_total;
+ __le32 rx_overrun;
+ __le32 tick;
+} __packed;
+
struct carl9170_rsp {
struct carl9170_cmd_head hdr;
@@ -300,6 +310,7 @@ struct carl9170_rsp {
struct carl9170_gpio gpio;
struct carl9170_tsf_rsp tsf;
struct carl9170_psm psm;
+ struct carl9170_tally_rsp tally;
u8 data[CARL9170_MAX_CMD_PAYLOAD_LEN];
} __packed;
} __packed __aligned(4);
diff --git a/drivers/net/wireless/ath/carl9170/fwdesc.h b/drivers/net/wireless/ath/carl9170/fwdesc.h
index 7ba62bb..6d9c089 100644
--- a/drivers/net/wireless/ath/carl9170/fwdesc.h
+++ b/drivers/net/wireless/ath/carl9170/fwdesc.h
@@ -75,6 +75,9 @@ enum carl9170fw_feature_list {
/* Firmware supports PSM in the 5GHZ Band */
CARL9170FW_FIXED_5GHZ_PSM,
+ /* HW (ANI, CCA, MIB) tally counters */
+ CARL9170FW_HW_COUNTERS,
+
/* KEEP LAST */
__CARL9170FW_FEATURE_NUM
};
diff --git a/drivers/net/wireless/ath/carl9170/hw.h b/drivers/net/wireless/ath/carl9170/hw.h
index 261f893..5ac7381 100644
--- a/drivers/net/wireless/ath/carl9170/hw.h
+++ b/drivers/net/wireless/ath/carl9170/hw.h
@@ -222,6 +222,12 @@
#define AR9170_MAC_REG_TX_BLOCKACKS (AR9170_MAC_REG_BASE + 0x6c0)
#define AR9170_MAC_REG_NAV_COUNT (AR9170_MAC_REG_BASE + 0x6c4)
#define AR9170_MAC_REG_BACKOFF_STATUS (AR9170_MAC_REG_BASE + 0x6c8)
+#define AR9170_MAC_BACKOFF_CCA BIT(24)
+#define AR9170_MAC_BACKOFF_TX_PEX BIT(25)
+#define AR9170_MAC_BACKOFF_RX_PE BIT(26)
+#define AR9170_MAC_BACKOFF_MD_READY BIT(27)
+#define AR9170_MAC_BACKOFF_TX_PE BIT(28)
+
#define AR9170_MAC_REG_TX_RETRY (AR9170_MAC_REG_BASE + 0x6cc)
#define AR9170_MAC_REG_TX_COMPLETE (AR9170_MAC_REG_BASE + 0x6d4)
diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index 91b3fd3..ec1d13a 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -413,6 +413,9 @@ static int carl9170_op_start(struct ieee80211_hw *hw)
carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
+ ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
+ round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
+
ieee80211_wake_queues(ar->hw);
err = 0;
@@ -423,6 +426,7 @@ out:
static void carl9170_cancel_worker(struct ar9170 *ar)
{
+ cancel_delayed_work_sync(&ar->stat_work);
cancel_delayed_work_sync(&ar->tx_janitor);
#ifdef CONFIG_CARL9170_LEDS
cancel_delayed_work_sync(&ar->led_work);
@@ -794,6 +798,43 @@ static void carl9170_ps_work(struct work_struct *work)
mutex_unlock(&ar->mutex);
}
+static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise)
+{
+ int err;
+
+ if (noise) {
+ err = carl9170_get_noisefloor(ar);
+ if (err)
+ return err;
+ }
+
+ if (ar->fw.hw_counters) {
+ err = carl9170_collect_tally(ar);
+ if (err)
+ return err;
+ }
+
+ if (flush)
+ memset(&ar->tally, 0, sizeof(ar->tally));
+
+ return 0;
+}
+
+static void carl9170_stat_work(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work);
+ int err;
+
+ mutex_lock(&ar->mutex);
+ err = carl9170_update_survey(ar, false, true);
+ mutex_unlock(&ar->mutex);
+
+ if (err)
+ return;
+
+ ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
+ round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
+}
static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
{
@@ -828,11 +869,19 @@ static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
if (err)
goto out;
+ err = carl9170_update_survey(ar, true, false);
+ if (err)
+ goto out;
+
err = carl9170_set_channel(ar, hw->conf.channel,
hw->conf.channel_type, CARL9170_RFI_NONE);
if (err)
goto out;
+ err = carl9170_update_survey(ar, false, true);
+ if (err)
+ goto out;
+
err = carl9170_set_dyn_sifs_ack(ar);
if (err)
goto out;
@@ -1527,20 +1576,48 @@ static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct ar9170 *ar = hw->priv;
- int err;
+ struct ieee80211_channel *chan;
+ struct ieee80211_supported_band *band;
+ int err, b, i;
- if (idx != 0)
- return -ENOENT;
+ if (idx == 0) {
+ mutex_lock(&ar->mutex);
+ err = carl9170_update_survey(ar, false, true);
+ mutex_unlock(&ar->mutex);
+ if (err)
+ return err;
+ }
- mutex_lock(&ar->mutex);
- err = carl9170_get_noisefloor(ar);
- mutex_unlock(&ar->mutex);
- if (err)
- return err;
+ for (b = 0; b < IEEE80211_NUM_BANDS; b++) {
+ band = ar->hw->wiphy->bands[b];
+
+ if (!band)
+ continue;
- survey->channel = ar->channel;
+ for (i = 0; i < band->n_channels; i++) {
+ if (band->channels[i].hw_value == idx) {
+ chan = &band->channels[i];
+ goto found;
+ }
+ }
+ }
+ return -ENOENT;
+
+found:
+ memcpy(survey, &ar->survey[idx], sizeof(*survey));
+
+ survey->channel = chan;
survey->filled = SURVEY_INFO_NOISE_DBM;
- survey->noise = ar->noise[0];
+
+ if (ar->channel == chan)
+ survey->filled |= SURVEY_INFO_IN_USE;
+
+ if (ar->fw.hw_counters) {
+ survey->filled |= SURVEY_INFO_CHANNEL_TIME |
+ SURVEY_INFO_CHANNEL_TIME_BUSY |
+ SURVEY_INFO_CHANNEL_TIME_TX;
+ }
+
return 0;
}
@@ -1665,6 +1742,7 @@ void *carl9170_alloc(size_t priv_size)
INIT_WORK(&ar->ping_work, carl9170_ping_work);
INIT_WORK(&ar->restart_work, carl9170_restart_work);
INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
+ INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work);
INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
INIT_LIST_HEAD(&ar->tx_ampdu_list);
rcu_assign_pointer(ar->tx_ampdu_iter,
@@ -1748,6 +1826,7 @@ static int carl9170_parse_eeprom(struct ar9170 *ar)
struct ath_regulatory *regulatory = &ar->common.regulatory;
unsigned int rx_streams, tx_streams, tx_params = 0;
int bands = 0;
+ int chans = 0;
if (ar->eeprom.length == cpu_to_le16(0xffff))
return -ENODATA;
@@ -1771,14 +1850,24 @@ static int carl9170_parse_eeprom(struct ar9170 *ar)
if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&carl9170_band_2GHz;
+ chans += carl9170_band_2GHz.n_channels;
bands++;
}
if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&carl9170_band_5GHz;
+ chans += carl9170_band_5GHz.n_channels;
bands++;
}
+ if (!bands)
+ return -EINVAL;
+
+ ar->survey = kzalloc(sizeof(struct survey_info) * chans, GFP_KERNEL);
+ if (!ar->survey)
+ return -ENOMEM;
+ ar->num_channels = chans;
+
/*
* I measured this, a bandswitch takes roughly
* 135 ms and a frequency switch about 80.
@@ -1797,7 +1886,7 @@ static int carl9170_parse_eeprom(struct ar9170 *ar)
/* second part of wiphy init */
SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
- return bands ? 0 : -EINVAL;
+ return 0;
}
static int carl9170_reg_notifier(struct wiphy *wiphy,
@@ -1936,6 +2025,9 @@ void carl9170_free(struct ar9170 *ar)
kfree(ar->mem_bitmap);
ar->mem_bitmap = NULL;
+ kfree(ar->survey);
+ ar->survey = NULL;
+
mutex_destroy(&ar->mutex);
ieee80211_free_hw(ar->hw);
diff --git a/drivers/net/wireless/ath/carl9170/phy.c b/drivers/net/wireless/ath/carl9170/phy.c
index da1ab96..21dc2da 100644
--- a/drivers/net/wireless/ath/carl9170/phy.c
+++ b/drivers/net/wireless/ath/carl9170/phy.c
@@ -1574,6 +1574,9 @@ int carl9170_get_noisefloor(struct ar9170 *ar)
AR9170_PHY_EXT_CCA_MIN_PWR, phy_res[i + 2]), 8);
}
+ if (ar->channel)
+ ar->survey[ar->channel->hw_value].noise = ar->noise[0];
+
return 0;
}
@@ -1766,10 +1769,6 @@ int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
ar->chan_fail = 0;
}
- err = carl9170_get_noisefloor(ar);
- if (err)
- return err;
-
if (ar->heavy_clip) {
err = carl9170_write_reg(ar, AR9170_PHY_REG_HEAVY_CLIP_ENABLE,
0x200 | ar->heavy_clip);
--
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