[PATCH 0/3] ath11k: Fix no data captured in monitor co-exist mode

[PATCH 0/3] ath11k: Fix no data captured in monitor co-exist mode

[Jouni Malinen]

From: Seevalamuthu Mariappan <seevalam@codeaurora.org>

In AP+monitor coexistance, monitor interface is capturing only
local traffic. This patchset changes monitor mode approach to
address monitor mode issues.

Seevalamuthu Mariappan (3):
  ath11k: move static function ath11k_mac_vdev_setup_sync to top
  ath11k: add separate APIs for monitor mode
  ath11k: monitor mode clean up to use separate APIs

 drivers/net/wireless/ath/ath11k/core.h  |  10 +-
 drivers/net/wireless/ath/ath11k/dp_rx.c |   2 +-
 drivers/net/wireless/ath/ath11k/dp_tx.c |   9 +-
 drivers/net/wireless/ath/ath11k/mac.c   | 429 ++++++++++++++++++++++++++++----
 4 files changed, 387 insertions(+), 63 deletions(-)

-- 
2.7.4

[PATCH 1/3] ath11k: move static function ath11k_mac_vdev_setup_sync to top

[Jouni Malinen]

From: Seevalamuthu Mariappan <seevalam@codeaurora.org>

This is to prepare for monitor mode clean up.
No functional changes are done.

Co-developed-by: Miles Hu <milehu@codeaurora.org>
Signed-off-by: Miles Hu <milehu@codeaurora.org>
Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/mac.c | 28 +++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index e8da4af82221..3fd9a79801cb 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -731,6 +731,20 @@ static int ath11k_monitor_vdev_up(struct ath11k *ar, int vdev_id)
 	return 0;
 }
 
+static inline int ath11k_mac_vdev_setup_sync(struct ath11k *ar)
+{
+	lockdep_assert_held(&ar->conf_mutex);
+
+	if (test_bit(ATH11K_FLAG_CRASH_FLUSH, &ar->ab->dev_flags))
+		return -ESHUTDOWN;
+
+	if (!wait_for_completion_timeout(&ar->vdev_setup_done,
+					 ATH11K_VDEV_SETUP_TIMEOUT_HZ))
+		return -ETIMEDOUT;
+
+	return ar->last_wmi_vdev_start_status ? -EINVAL : 0;
+}
+
 static int ath11k_mac_op_config(struct ieee80211_hw *hw, u32 changed)
 {
 	/* mac80211 requires this op to be present and that's why
@@ -5165,20 +5179,6 @@ static void ath11k_mac_op_remove_chanctx(struct ieee80211_hw *hw,
 	mutex_unlock(&ar->conf_mutex);
 }
 
-static inline int ath11k_mac_vdev_setup_sync(struct ath11k *ar)
-{
-	lockdep_assert_held(&ar->conf_mutex);
-
-	if (test_bit(ATH11K_FLAG_CRASH_FLUSH, &ar->ab->dev_flags))
-		return -ESHUTDOWN;
-
-	if (!wait_for_completion_timeout(&ar->vdev_setup_done,
-					 ATH11K_VDEV_SETUP_TIMEOUT_HZ))
-		return -ETIMEDOUT;
-
-	return ar->last_wmi_vdev_start_status ? -EINVAL : 0;
-}
-
 static int
 ath11k_mac_vdev_start_restart(struct ath11k_vif *arvif,
 			      const struct cfg80211_chan_def *chandef,
-- 
2.25.1

[PATCH 2/3] ath11k: add separate APIs for monitor mode

[Jouni Malinen]

From: Seevalamuthu Mariappan <seevalam@codeaurora.org>

Add separate APIs for monitor_vdev_create/monitor_vdev_delete
and monitor_vdev_start/monitor_vdev_stop.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1

Co-developed-by: Miles Hu <milehu@codeaurora.org>
Signed-off-by: Miles Hu <milehu@codeaurora.org>
Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/core.h |   5 +-
 drivers/net/wireless/ath/ath11k/mac.c  | 313 ++++++++++++++++++++++++-
 2 files changed, 312 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 6a6cabdd3e30..3cddab695031 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -488,7 +488,8 @@ struct ath11k {
 	u32 chan_tx_pwr;
 	u32 num_stations;
 	u32 max_num_stations;
-	bool monitor_present;
+	bool monitor_conf_enabled;
+	bool monitor_started;
 	/* To synchronize concurrent synchronous mac80211 callback operations,
 	 * concurrent debugfs configuration and concurrent FW statistics events.
 	 */
@@ -563,6 +564,7 @@ struct ath11k {
 	struct ath11k_per_peer_tx_stats cached_stats;
 	u32 last_ppdu_id;
 	u32 cached_ppdu_id;
+	int monitor_vdev_id;
 #ifdef CONFIG_ATH11K_DEBUGFS
 	struct ath11k_debug debug;
 #endif
@@ -571,6 +573,7 @@ struct ath11k {
 #endif
 	bool dfs_block_radar_events;
 	struct ath11k_thermal thermal;
+	bool monitor_vdev_created;
 };
 
 struct ath11k_band_cap {
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index 3fd9a79801cb..e446817ac8b0 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -745,14 +745,314 @@ static inline int ath11k_mac_vdev_setup_sync(struct ath11k *ar)
 	return ar->last_wmi_vdev_start_status ? -EINVAL : 0;
 }
 
-static int ath11k_mac_op_config(struct ieee80211_hw *hw, u32 changed)
+static void
+ath11k_mac_get_any_chandef_iter(struct ieee80211_hw *hw,
+				struct ieee80211_chanctx_conf *conf,
+				void *data)
 {
-	/* mac80211 requires this op to be present and that's why
-	 * there's an empty function, this can be extended when
-	 * required.
-	 */
+	struct cfg80211_chan_def **def = data;
+
+	*def = &conf->def;
+}
+
+static int ath11k_mac_monitor_vdev_start(struct ath11k *ar, int vdev_id,
+					 struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_channel *channel;
+	struct wmi_vdev_start_req_arg arg = {};
+	int ret;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	channel = chandef->chan;
+
+	arg.vdev_id = vdev_id;
+	arg.channel.freq = channel->center_freq;
+	arg.channel.band_center_freq1 = chandef->center_freq1;
+	arg.channel.band_center_freq2 = chandef->center_freq2;
+
+	arg.channel.mode = ath11k_phymodes[chandef->chan->band][chandef->width];
+	arg.channel.chan_radar =
+			!!(channel->flags & IEEE80211_CHAN_RADAR);
+
+	arg.channel.min_power = 0;
+	arg.channel.max_power = channel->max_power * 2;
+	arg.channel.max_reg_power = channel->max_reg_power * 2;
+	arg.channel.max_antenna_gain = channel->max_antenna_gain * 2;
+
+	arg.pref_tx_streams = ar->num_tx_chains;
+	arg.pref_rx_streams = ar->num_rx_chains;
+
+	arg.channel.passive = !!(chandef->chan->flags & IEEE80211_CHAN_NO_IR);
+
+	reinit_completion(&ar->vdev_setup_done);
+	reinit_completion(&ar->vdev_delete_done);
 
+	ret = ath11k_wmi_vdev_start(ar, &arg, false);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to request monitor vdev %i start: %d\n",
+			    vdev_id, ret);
+		return ret;
+	}
+	ret = ath11k_mac_vdev_setup_sync(ar);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to synchronize setup for monitor vdev %i start: %d\n",
+			    vdev_id, ret);
+		return ret;
+	}
+	ret = ath11k_wmi_vdev_up(ar, vdev_id, 0, ar->mac_addr);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to put up monitor vdev %i: %d\n",
+			    vdev_id, ret);
+		goto vdev_stop;
+	}
+	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i started\n",
+		   vdev_id);
 	return 0;
+
+vdev_stop:
+	reinit_completion(&ar->vdev_setup_done);
+
+	ret = ath11k_wmi_vdev_stop(ar, vdev_id);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to stop monitor vdev %i after start failure: %d\n",
+			    vdev_id, ret);
+		return ret;
+	}
+
+	ret = ath11k_mac_vdev_setup_sync(ar);
+	if (ret)
+		ath11k_warn(ar->ab, "failed to synchronize setup for vdev %i stop: %d\n",
+			    vdev_id, ret);
+	return ret;
+}
+
+static int ath11k_mac_monitor_vdev_stop(struct ath11k *ar)
+{
+	int ret;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	reinit_completion(&ar->vdev_setup_done);
+
+	ret = ath11k_wmi_vdev_stop(ar, ar->monitor_vdev_id);
+	if (ret)
+		ath11k_warn(ar->ab, "failed to request monitor vdev %i stop: %d\n",
+			    ar->monitor_vdev_id, ret);
+
+	ret = ath11k_mac_vdev_setup_sync(ar);
+	if (ret)
+		ath11k_warn(ar->ab, "failed to synchronize monitor vdev %i stop: %d\n",
+			    ar->monitor_vdev_id, ret);
+
+	ret = ath11k_wmi_vdev_down(ar, ar->monitor_vdev_id);
+	if (ret)
+		ath11k_warn(ar->ab, "failed to put down monitor vdev %i: %d\n",
+			    ar->monitor_vdev_id, ret);
+
+	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i stopped\n",
+		   ar->monitor_vdev_id);
+	return ret;
+}
+
+static int ath11k_mac_monitor_vdev_create(struct ath11k *ar)
+{
+	struct ath11k_pdev *pdev = ar->pdev;
+	struct vdev_create_params param = {};
+	int bit, ret;
+	u8 tmp_addr[6] = {0};
+	u16 nss;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	if (ar->monitor_vdev_created)
+		return 0;
+
+	if (ar->ab->free_vdev_map == 0) {
+		ath11k_warn(ar->ab, "failed to find free vdev id for monitor vdev\n");
+		return -ENOMEM;
+	}
+
+	bit = __ffs64(ar->ab->free_vdev_map);
+
+	ar->monitor_vdev_id = bit;
+
+	param.if_id = ar->monitor_vdev_id;
+	param.type = WMI_VDEV_TYPE_MONITOR;
+	param.subtype = WMI_VDEV_SUBTYPE_NONE;
+	param.pdev_id = pdev->pdev_id;
+
+	if (pdev->cap.supported_bands & WMI_HOST_WLAN_2G_CAP) {
+		param.chains[NL80211_BAND_2GHZ].tx = ar->num_tx_chains;
+		param.chains[NL80211_BAND_2GHZ].rx = ar->num_rx_chains;
+	}
+	if (pdev->cap.supported_bands & WMI_HOST_WLAN_5G_CAP) {
+		param.chains[NL80211_BAND_5GHZ].tx = ar->num_tx_chains;
+		param.chains[NL80211_BAND_5GHZ].rx = ar->num_rx_chains;
+	}
+
+	ret = ath11k_wmi_vdev_create(ar, tmp_addr, &param);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to request monitor vdev %i creation: %d\n",
+			    ar->monitor_vdev_id, ret);
+		ar->monitor_vdev_id = -1;
+		return ret;
+	}
+
+	nss = get_num_chains(ar->cfg_tx_chainmask) ? : 1;
+	ret = ath11k_wmi_vdev_set_param_cmd(ar, ar->monitor_vdev_id,
+					    WMI_VDEV_PARAM_NSS, nss);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to set vdev %d chainmask 0x%x, nss %d :%d\n",
+			    ar->monitor_vdev_id, ar->cfg_tx_chainmask, nss, ret);
+		goto err_vdev_del;
+	}
+
+	ret = ath11k_mac_txpower_recalc(ar);
+	if (ret)
+		goto err_vdev_del;
+
+	ar->allocated_vdev_map |= 1LL << ar->monitor_vdev_id;
+	ar->ab->free_vdev_map &= ~(1LL << ar->monitor_vdev_id);
+	ar->num_created_vdevs++;
+	ar->monitor_vdev_created = true;
+	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %d created\n",
+		   ar->monitor_vdev_id);
+
+	return 0;
+
+err_vdev_del:
+	ath11k_wmi_vdev_delete(ar, ar->monitor_vdev_id);
+	ar->monitor_vdev_id = -1;
+	return ret;
+}
+
+static int ath11k_mac_monitor_vdev_delete(struct ath11k *ar)
+{
+	int ret;
+	unsigned long time_left;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	if (!ar->monitor_vdev_created)
+		return 0;
+
+	reinit_completion(&ar->vdev_delete_done);
+
+	ret = ath11k_wmi_vdev_delete(ar, ar->monitor_vdev_id);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to request wmi monitor vdev %i removal: %d\n",
+			    ar->monitor_vdev_id, ret);
+		return ret;
+	}
+
+	time_left = wait_for_completion_timeout(&ar->vdev_delete_done,
+						ATH11K_VDEV_DELETE_TIMEOUT_HZ);
+	if (time_left == 0) {
+		ath11k_warn(ar->ab, "Timeout in receiving vdev delete response\n");
+	} else {
+		ar->allocated_vdev_map &= ~(1LL << ar->monitor_vdev_id);
+		ar->ab->free_vdev_map |= 1LL << (ar->monitor_vdev_id);
+		ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %d deleted\n",
+			   ar->monitor_vdev_id);
+		ar->num_created_vdevs--;
+		ar->monitor_vdev_id = -1;
+		ar->monitor_vdev_created = false;
+	}
+
+	return ret;
+}
+
+static int ath11k_mac_monitor_start(struct ath11k *ar)
+{
+	struct cfg80211_chan_def *chandef = NULL;
+	int ret;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	if (ar->monitor_started)
+		return 0;
+
+	ieee80211_iter_chan_contexts_atomic(ar->hw,
+					    ath11k_mac_get_any_chandef_iter,
+					    &chandef);
+	if (!chandef)
+		return 0;
+
+	ret = ath11k_mac_monitor_vdev_start(ar, ar->monitor_vdev_id, chandef);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to start monitor vdev: %d\n", ret);
+		ath11k_mac_monitor_vdev_delete(ar);
+		return ret;
+	}
+
+	ar->monitor_started = true;
+	ar->num_started_vdevs++;
+	ret = ath11k_dp_tx_htt_monitor_mode_ring_config(ar, false);
+	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor started ret %d\n", ret);
+
+	return ret;
+}
+
+static int ath11k_mac_monitor_stop(struct ath11k *ar)
+{
+	int ret;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	if (!ar->monitor_started)
+		return 0;
+
+	ret = ath11k_mac_monitor_vdev_stop(ar);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to stop monitor vdev: %d\n", ret);
+		return ret;
+	}
+
+	ar->monitor_started = false;
+	ar->num_started_vdevs--;
+	ret = ath11k_dp_tx_htt_monitor_mode_ring_config(ar, true);
+	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor stopped ret %d\n", ret);
+	return ret;
+}
+
+static int ath11k_mac_op_config(struct ieee80211_hw *hw, u32 changed)
+{
+	struct ath11k *ar = hw->priv;
+	struct ieee80211_conf *conf = &hw->conf;
+	int ret = 0;
+
+	mutex_lock(&ar->conf_mutex);
+
+	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
+		ar->monitor_conf_enabled = conf->flags & IEEE80211_CONF_MONITOR;
+		if (ar->monitor_conf_enabled) {
+			if (ar->monitor_vdev_created)
+				goto exit;
+			ret = ath11k_mac_monitor_vdev_create(ar);
+			if (ret)
+				goto exit;
+			ret = ath11k_mac_monitor_start(ar);
+			if (ret)
+				goto err_mon_del;
+		} else {
+			if (!ar->monitor_vdev_created)
+				goto exit;
+			ret = ath11k_mac_monitor_stop(ar);
+			if (ret)
+				goto exit;
+			ath11k_mac_monitor_vdev_delete(ar);
+		}
+	}
+
+exit:
+	mutex_unlock(&ar->conf_mutex);
+	return ret;
+
+err_mon_del:
+	ath11k_mac_monitor_vdev_delete(ar);
+	mutex_unlock(&ar->conf_mutex);
+	return ret;
 }
 
 static int ath11k_mac_setup_bcn_tmpl(struct ath11k_vif *arvif)
@@ -6772,6 +7072,9 @@ int ath11k_mac_allocate(struct ath11k_base *ab)
 		INIT_WORK(&ar->wmi_mgmt_tx_work, ath11k_mgmt_over_wmi_tx_work);
 		skb_queue_head_init(&ar->wmi_mgmt_tx_queue);
 		clear_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags);
+		ar->monitor_vdev_id = -1;
+		ar->monitor_vdev_created = false;
+		ar->monitor_started = false;
 	}
 
 	return 0;
-- 
2.25.1

[PATCH 3/3] ath11k: monitor mode clean up to use separate APIs

[Jouni Malinen]

From: Seevalamuthu Mariappan <seevalam@codeaurora.org>

If monitor interface is enabled in co-exist mode, only local traffic are
captured. It's caused by missing monitor vdev in co-exist mode. So,
monitor mode clean up is done with separate Monitor APIs. For this,
introduce monitor_started and monitor_vdev_created boolean flags.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1

Co-developed-by: Miles Hu <milehu@codeaurora.org>
Signed-off-by: Miles Hu <milehu@codeaurora.org>
Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/core.h  |   5 --
 drivers/net/wireless/ath/ath11k/dp_rx.c |   2 +-
 drivers/net/wireless/ath/ath11k/dp_tx.c |   9 +-
 drivers/net/wireless/ath/ath11k/mac.c   | 112 ++++++++++++++----------
 4 files changed, 73 insertions(+), 55 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 3cddab695031..0ad5a935b52b 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -192,10 +192,6 @@ enum ath11k_dev_flags {
 	ATH11K_FLAG_HTC_SUSPEND_COMPLETE,
 };
 
-enum ath11k_monitor_flags {
-	ATH11K_FLAG_MONITOR_ENABLED,
-};
-
 struct ath11k_vif {
 	u32 vdev_id;
 	enum wmi_vdev_type vdev_type;
@@ -478,7 +474,6 @@ struct ath11k {
 
 	unsigned long dev_flags;
 	unsigned int filter_flags;
-	unsigned long monitor_flags;
 	u32 min_tx_power;
 	u32 max_tx_power;
 	u32 txpower_limit_2g;
diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index 9a224817630a..6fde70914e1a 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -5029,7 +5029,7 @@ int ath11k_dp_rx_process_mon_rings(struct ath11k_base *ab, int mac_id,
 	struct ath11k *ar = ath11k_ab_to_ar(ab, mac_id);
 	int ret = 0;
 
-	if (test_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags))
+	if (ar->monitor_started)
 		ret = ath11k_dp_mon_process_rx(ab, mac_id, napi, budget);
 	else
 		ret = ath11k_dp_rx_process_mon_status(ab, mac_id, napi, budget);
diff --git a/drivers/net/wireless/ath/ath11k/dp_tx.c b/drivers/net/wireless/ath/ath11k/dp_tx.c
index 3acdd4050d5b..253d0564f923 100644
--- a/drivers/net/wireless/ath/ath11k/dp_tx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_tx.c
@@ -1076,11 +1076,16 @@ int ath11k_dp_tx_htt_monitor_mode_ring_config(struct ath11k *ar, bool reset)
 
 	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
 		ring_id = dp->rx_mon_status_refill_ring[i].refill_buf_ring.ring_id;
-		if (!reset)
+		if (!reset) {
 			tlv_filter.rx_filter =
 					HTT_RX_MON_FILTER_TLV_FLAGS_MON_STATUS_RING;
-		else
+		} else {
 			tlv_filter = ath11k_mac_mon_status_filter_default;
+#ifdef CONFIG_ATH11K_DEBUGFS
+			if (ar->debug.extd_rx_stats)
+				tlv_filter.rx_filter = ar->debug.rx_filter;
+#endif
+		}
 
 		ret = ath11k_dp_tx_htt_rx_filter_setup(ab, ring_id,
 						       dp->mac_id + i,
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index e446817ac8b0..b9d4e8914482 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -715,22 +715,6 @@ void ath11k_mac_peer_cleanup_all(struct ath11k *ar)
 	ar->num_stations = 0;
 }
 
-static int ath11k_monitor_vdev_up(struct ath11k *ar, int vdev_id)
-{
-	int ret = 0;
-
-	ret = ath11k_wmi_vdev_up(ar, vdev_id, 0, ar->mac_addr);
-	if (ret) {
-		ath11k_warn(ar->ab, "failed to put up monitor vdev %i: %d\n",
-			    vdev_id, ret);
-		return ret;
-	}
-
-	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i started\n",
-		   vdev_id);
-	return 0;
-}
-
 static inline int ath11k_mac_vdev_setup_sync(struct ath11k *ar)
 {
 	lockdep_assert_held(&ar->conf_mutex);
@@ -2270,7 +2254,7 @@ static int ath11k_mac_config_obss_pd(struct ath11k *ar,
 
 	/* Set and enable SRG/non-SRG OBSS PD Threshold */
 	param_id = WMI_PDEV_PARAM_SET_CMD_OBSS_PD_THRESHOLD;
-	if (test_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags)) {
+	if (ar->monitor_started) {
 		ret = ath11k_wmi_pdev_set_param(ar, param_id, 0, pdev_id);
 		if (ret)
 			ath11k_warn(ar->ab,
@@ -5044,8 +5028,8 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
 	}
 
 	if (ar->num_created_vdevs > (TARGET_NUM_VDEVS - 1)) {
-		ath11k_warn(ab, "failed to create vdev, reached max vdev limit %d\n",
-			    TARGET_NUM_VDEVS);
+		ath11k_warn(ab, "failed to create vdev %u, reached max vdev limit %d\n",
+			    ar->num_created_vdevs, TARGET_NUM_VDEVS);
 		ret = -EBUSY;
 		goto err;
 	}
@@ -5085,6 +5069,7 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
 		break;
 	case NL80211_IFTYPE_MONITOR:
 		arvif->vdev_type = WMI_VDEV_TYPE_MONITOR;
+		ar->monitor_vdev_id = bit;
 		break;
 	default:
 		WARN_ON(1);
@@ -5186,6 +5171,9 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
 			goto err_peer_del;
 		}
 		break;
+	case WMI_VDEV_TYPE_MONITOR:
+		ar->monitor_vdev_created = true;
+		break;
 	default:
 		break;
 	}
@@ -5206,6 +5194,12 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
 
 	ath11k_dp_vdev_tx_attach(ar, arvif);
 
+	if (vif->type != NL80211_IFTYPE_MONITOR && ar->monitor_conf_enabled) {
+		ret = ath11k_mac_monitor_vdev_create(ar);
+		if (ret)
+			goto err_peer_del;
+	}
+
 	mutex_unlock(&ar->conf_mutex);
 
 	return 0;
@@ -5303,6 +5297,13 @@ static void ath11k_mac_op_remove_interface(struct ieee80211_hw *hw,
 	ath11k_dbg(ab, ATH11K_DBG_MAC, "vdev %pM deleted, vdev_id %d\n",
 		   vif->addr, arvif->vdev_id);
 
+	if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR) {
+		ar->monitor_vdev_created = false;
+		ar->monitor_vdev_id = -1;
+	} else if (ar->monitor_vdev_created && !ar->monitor_started) {
+		ret = ath11k_mac_monitor_vdev_delete(ar);
+	}
+
 err_vdev_del:
 	spin_lock_bh(&ar->data_lock);
 	list_del(&arvif->list);
@@ -5322,7 +5323,6 @@ static void ath11k_mac_op_remove_interface(struct ieee80211_hw *hw,
 
 	/* Recalc txpower for remaining vdev */
 	ath11k_mac_txpower_recalc(ar);
-	clear_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags);
 
 	/* TODO: recal traffic pause state based on the available vdevs */
 
@@ -5345,8 +5345,6 @@ static void ath11k_mac_op_configure_filter(struct ieee80211_hw *hw,
 					   u64 multicast)
 {
 	struct ath11k *ar = hw->priv;
-	bool reset_flag = false;
-	int ret = 0;
 
 	mutex_lock(&ar->conf_mutex);
 
@@ -5354,23 +5352,6 @@ static void ath11k_mac_op_configure_filter(struct ieee80211_hw *hw,
 	*total_flags &= SUPPORTED_FILTERS;
 	ar->filter_flags = *total_flags;
 
-	/* For monitor mode */
-	reset_flag = !(ar->filter_flags & FIF_BCN_PRBRESP_PROMISC);
-
-	ret = ath11k_dp_tx_htt_monitor_mode_ring_config(ar, reset_flag);
-	if (!ret) {
-		if (!reset_flag)
-			set_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags);
-		else
-			clear_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags);
-	} else {
-		ath11k_warn(ar->ab,
-			    "fail to set monitor filter: %d\n", ret);
-	}
-	ath11k_dbg(ar->ab, ATH11K_DBG_MAC,
-		   "changed_flags:0x%x, total_flags:0x%x, reset_flag:%d\n",
-		   changed_flags, *total_flags, reset_flag);
-
 	mutex_unlock(&ar->conf_mutex);
 }
 
@@ -5561,7 +5542,9 @@ ath11k_mac_vdev_start_restart(struct ath11k_vif *arvif,
 		return ret;
 	}
 
-	ar->num_started_vdevs++;
+	if (!restart)
+		ar->num_started_vdevs++;
+
 	ath11k_dbg(ab, ATH11K_DBG_MAC,  "vdev %pM started, vdev_id %d\n",
 		   arvif->vif->addr, arvif->vdev_id);
 
@@ -5689,12 +5672,16 @@ ath11k_mac_update_vif_chan(struct ath11k *ar,
 	struct ath11k_vif *arvif;
 	int ret;
 	int i;
+	bool monitor_vif = false;
 
 	lockdep_assert_held(&ar->conf_mutex);
 
 	for (i = 0; i < n_vifs; i++) {
 		arvif = (void *)vifs[i].vif->drv_priv;
 
+		if (vifs[i].vif->type == NL80211_IFTYPE_MONITOR)
+			monitor_vif = true;
+
 		ath11k_dbg(ab, ATH11K_DBG_MAC,
 			   "mac chanctx switch vdev_id %i freq %u->%u width %d->%d\n",
 			   arvif->vdev_id,
@@ -5715,6 +5702,8 @@ ath11k_mac_update_vif_chan(struct ath11k *ar,
 				    arvif->vdev_id, ret);
 			continue;
 		}
+
+		ar->num_started_vdevs--;
 	}
 
 	/* All relevant vdevs are downed and associated channel resources
@@ -5752,6 +5741,12 @@ ath11k_mac_update_vif_chan(struct ath11k *ar,
 			continue;
 		}
 	}
+
+	/* Restart the internal monitor vdev on new channel */
+	if (!monitor_vif && ar->monitor_vdev_created) {
+		if (!ath11k_mac_monitor_stop(ar))
+			ath11k_mac_monitor_start(ar);
+	}
 }
 
 static void
@@ -5831,7 +5826,7 @@ static int ath11k_start_vdev_delay(struct ieee80211_hw *hw,
 	}
 
 	if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR) {
-		ret = ath11k_monitor_vdev_up(ar, arvif->vdev_id);
+		ret = ath11k_wmi_vdev_up(ar, arvif->vdev_id, 0, ar->mac_addr);
 		if (ret) {
 			ath11k_warn(ab, "failed put monitor up: %d\n", ret);
 			return ret;
@@ -5891,6 +5886,15 @@ ath11k_mac_op_assign_vif_chanctx(struct ieee80211_hw *hw,
 		}
 	}
 
+	if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR) {
+		ret = ath11k_mac_monitor_start(ar);
+		if (ret)
+			goto out;
+
+		arvif->is_started = true;
+		goto out;
+	}
+
 	ret = ath11k_mac_vdev_start(arvif, &ctx->def);
 	if (ret) {
 		ath11k_warn(ab, "failed to start vdev %i addr %pM on freq %d: %d\n",
@@ -5898,14 +5902,13 @@ ath11k_mac_op_assign_vif_chanctx(struct ieee80211_hw *hw,
 			    ctx->def.chan->center_freq, ret);
 		goto out;
 	}
-	if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR) {
-		ret = ath11k_monitor_vdev_up(ar, arvif->vdev_id);
-		if (ret)
-			goto out;
-	}
 
 	arvif->is_started = true;
 
+	if (arvif->vdev_type != WMI_VDEV_TYPE_MONITOR &&
+	    ar->monitor_vdev_created)
+		ath11k_mac_monitor_start(ar);
+
 	/* TODO: Setup ps and cts/rts protection */
 
 	ret = 0;
@@ -5939,6 +5942,18 @@ ath11k_mac_op_unassign_vif_chanctx(struct ieee80211_hw *hw,
 	    ath11k_peer_find_by_addr(ab, ar->mac_addr))
 		ath11k_peer_delete(ar, arvif->vdev_id, ar->mac_addr);
 
+	if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR) {
+		ret = ath11k_mac_monitor_stop(ar);
+		if (ret) {
+			mutex_unlock(&ar->conf_mutex);
+			return;
+		}
+
+		arvif->is_started = false;
+		mutex_unlock(&ar->conf_mutex);
+		return;
+	}
+
 	ret = ath11k_mac_vdev_stop(arvif);
 	if (ret)
 		ath11k_warn(ab, "failed to stop vdev %i: %d\n",
@@ -5950,6 +5965,10 @@ ath11k_mac_op_unassign_vif_chanctx(struct ieee80211_hw *hw,
 	    arvif->vdev_type == WMI_VDEV_TYPE_MONITOR)
 		ath11k_wmi_vdev_down(ar, arvif->vdev_id);
 
+	if (arvif->vdev_type != WMI_VDEV_TYPE_MONITOR &&
+	    ar->num_started_vdevs == 1 && ar->monitor_vdev_created)
+		ath11k_mac_monitor_stop(ar);
+
 	mutex_unlock(&ar->conf_mutex);
 }
 
@@ -7071,7 +7090,6 @@ int ath11k_mac_allocate(struct ath11k_base *ab)
 
 		INIT_WORK(&ar->wmi_mgmt_tx_work, ath11k_mgmt_over_wmi_tx_work);
 		skb_queue_head_init(&ar->wmi_mgmt_tx_queue);
-		clear_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags);
 		ar->monitor_vdev_id = -1;
 		ar->monitor_vdev_created = false;
 		ar->monitor_started = false;
-- 
2.25.1

Re: [PATCH 3/3] ath11k: monitor mode clean up to use separate APIs

[Kalle Valo]

Jouni Malinen <jouni@codeaurora.org> writes:

> From: Seevalamuthu Mariappan <seevalam@codeaurora.org>
>
> If monitor interface is enabled in co-exist mode, only local traffic are
> captured. It's caused by missing monitor vdev in co-exist mode. So,
> monitor mode clean up is done with separate Monitor APIs. For this,
> introduce monitor_started and monitor_vdev_created boolean flags.
>
> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1

Seevalamuthu, in upstream IPQ8074 doesn't even support monitor mode:

static const struct ath11k_hw_params ath11k_hw_params[] = {
	{
		.hw_rev = ATH11K_HW_IPQ8074,
		.name = "ipq8074 hw2.0",
...
		.interface_modes = BIT(NL80211_IFTYPE_STATION) |
					BIT(NL80211_IFTYPE_AP) |
					BIT(NL80211_IFTYPE_MESH_POINT),

So I wonder how did you test this? Is this something which is only
tested on ancient QSDK kernels and not with upstream kernels?

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

Re: [PATCH 3/3] ath11k: monitor mode clean up to use separate APIs

[Kalle Valo]

Kalle Valo <kvalo@codeaurora.org> writes:

> Jouni Malinen <jouni@codeaurora.org> writes:
>
>> From: Seevalamuthu Mariappan <seevalam@codeaurora.org>
>>
>> If monitor interface is enabled in co-exist mode, only local traffic are
>> captured. It's caused by missing monitor vdev in co-exist mode. So,
>> monitor mode clean up is done with separate Monitor APIs. For this,
>> introduce monitor_started and monitor_vdev_created boolean flags.
>>
>> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1
>
> Seevalamuthu, in upstream IPQ8074 doesn't even support monitor mode:
>
> static const struct ath11k_hw_params ath11k_hw_params[] = {
> 	{
> 		.hw_rev = ATH11K_HW_IPQ8074,
> 		.name = "ipq8074 hw2.0",
> ...
> 		.interface_modes = BIT(NL80211_IFTYPE_STATION) |
> 					BIT(NL80211_IFTYPE_AP) |
> 					BIT(NL80211_IFTYPE_MESH_POINT),
>
> So I wonder how did you test this? Is this something which is only
> tested on ancient QSDK kernels and not with upstream kernels?

Actually, ignore that. I forgot that there was a separate boolean for
the monitor mode:

		.supports_monitor = true,

Sorry for the noise.

-- 
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https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

Re: [PATCH 3/3] ath11k: monitor mode clean up to use separate APIs

[Kalle Valo]

Jouni Malinen <jouni@codeaurora.org> writes:

> From: Seevalamuthu Mariappan <seevalam@codeaurora.org>
>
> If monitor interface is enabled in co-exist mode, only local traffic are
> captured. It's caused by missing monitor vdev in co-exist mode. So,
> monitor mode clean up is done with separate Monitor APIs. For this,
> introduce monitor_started and monitor_vdev_created boolean flags.
>
> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1
>
> Co-developed-by: Miles Hu <milehu@codeaurora.org>
> Signed-off-by: Miles Hu <milehu@codeaurora.org>
> Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
> Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
> ---
>  drivers/net/wireless/ath/ath11k/core.h  |   5 --
>  drivers/net/wireless/ath/ath11k/dp_rx.c |   2 +-
>  drivers/net/wireless/ath/ath11k/dp_tx.c |   9 +-
>  drivers/net/wireless/ath/ath11k/mac.c   | 112 ++++++++++++++----------
>  4 files changed, 73 insertions(+), 55 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
> index 3cddab695031..0ad5a935b52b 100644
> --- a/drivers/net/wireless/ath/ath11k/core.h
> +++ b/drivers/net/wireless/ath/ath11k/core.h
> @@ -192,10 +192,6 @@ enum ath11k_dev_flags {
>  	ATH11K_FLAG_HTC_SUSPEND_COMPLETE,
>  };
>  
> -enum ath11k_monitor_flags {
> -	ATH11K_FLAG_MONITOR_ENABLED,
> -};
> -
>  struct ath11k_vif {
>  	u32 vdev_id;
>  	enum wmi_vdev_type vdev_type;
> @@ -478,7 +474,6 @@ struct ath11k {
>  
>  	unsigned long dev_flags;
>  	unsigned int filter_flags;
> -	unsigned long monitor_flags;
>  	u32 min_tx_power;
>  	u32 max_tx_power;
>  	u32 txpower_limit_2g;
> diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
> index 9a224817630a..6fde70914e1a 100644
> --- a/drivers/net/wireless/ath/ath11k/dp_rx.c
> +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
> @@ -5029,7 +5029,7 @@ int ath11k_dp_rx_process_mon_rings(struct ath11k_base *ab, int mac_id,
>  	struct ath11k *ar = ath11k_ab_to_ar(ab, mac_id);
>  	int ret = 0;
>  
> -	if (test_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags))
> +	if (ar->monitor_started)
>  		ret = ath11k_dp_mon_process_rx(ab, mac_id, napi, budget);
>  	else
>  		ret = ath11k_dp_rx_process_mon_status(ab, mac_id, napi, budget);

Moving from test_bit() to a boolean looks racy to me, I don't see how
monitor_started is serialised.

And why move away from monitor_flags and having separate booleans
anyway? I would monitor_conf_enabled and monitor_started from patch 2 to
use monitor_flags.

> @@ -1076,11 +1076,16 @@ int ath11k_dp_tx_htt_monitor_mode_ring_config(struct ath11k *ar, bool reset)
>  
>  	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
>  		ring_id = dp->rx_mon_status_refill_ring[i].refill_buf_ring.ring_id;
> -		if (!reset)
> +		if (!reset) {
>  			tlv_filter.rx_filter =
>  					HTT_RX_MON_FILTER_TLV_FLAGS_MON_STATUS_RING;
> -		else
> +		} else {
>  			tlv_filter = ath11k_mac_mon_status_filter_default;
> +#ifdef CONFIG_ATH11K_DEBUGFS
> +			if (ar->debug.extd_rx_stats)
> +				tlv_filter.rx_filter = ar->debug.rx_filter;
> +#endif

This should use ath11k_debugfs_is_extd_rx_stats_enabled and
ath11k_debugfs_rx_filter(), then the ifdef is not needed.

-- 
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https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

Re: [PATCH 2/3] ath11k: add separate APIs for monitor mode

[Kalle Valo]

Jouni Malinen <jouni@codeaurora.org> writes:

> From: Seevalamuthu Mariappan <seevalam@codeaurora.org>
>
> Add separate APIs for monitor_vdev_create/monitor_vdev_delete
> and monitor_vdev_start/monitor_vdev_stop.
>
> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1
>
> Co-developed-by: Miles Hu <milehu@codeaurora.org>
> Signed-off-by: Miles Hu <milehu@codeaurora.org>
> Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
> Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
> ---
>  drivers/net/wireless/ath/ath11k/core.h |   5 +-
>  drivers/net/wireless/ath/ath11k/mac.c  | 313 ++++++++++++++++++++++++-
>  2 files changed, 312 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
> index 6a6cabdd3e30..3cddab695031 100644
> --- a/drivers/net/wireless/ath/ath11k/core.h
> +++ b/drivers/net/wireless/ath/ath11k/core.h
> @@ -488,7 +488,8 @@ struct ath11k {
>  	u32 chan_tx_pwr;
>  	u32 num_stations;
>  	u32 max_num_stations;
> -	bool monitor_present;
> +	bool monitor_conf_enabled;
> +	bool monitor_started;
>  	/* To synchronize concurrent synchronous mac80211 callback operations,
>  	 * concurrent debugfs configuration and concurrent FW statistics events.
>  	 */
> @@ -563,6 +564,7 @@ struct ath11k {
>  	struct ath11k_per_peer_tx_stats cached_stats;
>  	u32 last_ppdu_id;
>  	u32 cached_ppdu_id;
> +	int monitor_vdev_id;
>  #ifdef CONFIG_ATH11K_DEBUGFS
>  	struct ath11k_debug debug;
>  #endif
> @@ -571,6 +573,7 @@ struct ath11k {
>  #endif
>  	bool dfs_block_radar_events;
>  	struct ath11k_thermal thermal;
> +	bool monitor_vdev_created;
>  };
>  
>  struct ath11k_band_cap {
> diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
> index 3fd9a79801cb..e446817ac8b0 100644
> --- a/drivers/net/wireless/ath/ath11k/mac.c
> +++ b/drivers/net/wireless/ath/ath11k/mac.c
> @@ -745,14 +745,314 @@ static inline int ath11k_mac_vdev_setup_sync(struct ath11k *ar)
>  	return ar->last_wmi_vdev_start_status ? -EINVAL : 0;
>  }
>  
> -static int ath11k_mac_op_config(struct ieee80211_hw *hw, u32 changed)
> +static void
> +ath11k_mac_get_any_chandef_iter(struct ieee80211_hw *hw,
> +				struct ieee80211_chanctx_conf *conf,
> +				void *data)
>  {
> -	/* mac80211 requires this op to be present and that's why
> -	 * there's an empty function, this can be extended when
> -	 * required.
> -	 */
> +	struct cfg80211_chan_def **def = data;
> +
> +	*def = &conf->def;
> +}
> +
> +static int ath11k_mac_monitor_vdev_start(struct ath11k *ar, int vdev_id,
> +					 struct cfg80211_chan_def *chandef)
> +{
> +	struct ieee80211_channel *channel;
> +	struct wmi_vdev_start_req_arg arg = {};
> +	int ret;
> +
> +	lockdep_assert_held(&ar->conf_mutex);
> +
> +	channel = chandef->chan;
> +
> +	arg.vdev_id = vdev_id;
> +	arg.channel.freq = channel->center_freq;
> +	arg.channel.band_center_freq1 = chandef->center_freq1;
> +	arg.channel.band_center_freq2 = chandef->center_freq2;
> +
> +	arg.channel.mode = ath11k_phymodes[chandef->chan->band][chandef->width];
> +	arg.channel.chan_radar =
> +			!!(channel->flags & IEEE80211_CHAN_RADAR);
> +
> +	arg.channel.min_power = 0;
> +	arg.channel.max_power = channel->max_power * 2;
> +	arg.channel.max_reg_power = channel->max_reg_power * 2;
> +	arg.channel.max_antenna_gain = channel->max_antenna_gain * 2;
> +
> +	arg.pref_tx_streams = ar->num_tx_chains;
> +	arg.pref_rx_streams = ar->num_rx_chains;
> +
> +	arg.channel.passive = !!(chandef->chan->flags & IEEE80211_CHAN_NO_IR);
> +
> +	reinit_completion(&ar->vdev_setup_done);
> +	reinit_completion(&ar->vdev_delete_done);
>  
> +	ret = ath11k_wmi_vdev_start(ar, &arg, false);
> +	if (ret) {
> +		ath11k_warn(ar->ab, "failed to request monitor vdev %i start: %d\n",
> +			    vdev_id, ret);
> +		return ret;
> +	}
> +	ret = ath11k_mac_vdev_setup_sync(ar);
> +	if (ret) {
> +		ath11k_warn(ar->ab, "failed to synchronize setup for monitor vdev %i start: %d\n",
> +			    vdev_id, ret);
> +		return ret;
> +	}
> +	ret = ath11k_wmi_vdev_up(ar, vdev_id, 0, ar->mac_addr);
> +	if (ret) {
> +		ath11k_warn(ar->ab, "failed to put up monitor vdev %i: %d\n",
> +			    vdev_id, ret);
> +		goto vdev_stop;
> +	}
> +	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i started\n",
> +		   vdev_id);
>  	return 0;
> +
> +vdev_stop:
> +	reinit_completion(&ar->vdev_setup_done);
> +
> +	ret = ath11k_wmi_vdev_stop(ar, vdev_id);
> +	if (ret) {
> +		ath11k_warn(ar->ab, "failed to stop monitor vdev %i after start failure: %d\n",
> +			    vdev_id, ret);
> +		return ret;
> +	}
> +
> +	ret = ath11k_mac_vdev_setup_sync(ar);
> +	if (ret)
> +		ath11k_warn(ar->ab, "failed to synchronize setup for vdev %i stop: %d\n",
> +			    vdev_id, ret);

I added return ret here for consistency..

> +	return ret;

I don't thinks this is right, in an error path (vdev_stop label) we
return 0? I changed this to -EIO.

> +static int ath11k_mac_monitor_vdev_stop(struct ath11k *ar)
> +{
> +	int ret;
> +
> +	lockdep_assert_held(&ar->conf_mutex);
> +
> +	reinit_completion(&ar->vdev_setup_done);
> +
> +	ret = ath11k_wmi_vdev_stop(ar, ar->monitor_vdev_id);
> +	if (ret)
> +		ath11k_warn(ar->ab, "failed to request monitor vdev %i stop: %d\n",
> +			    ar->monitor_vdev_id, ret);
> +
> +	ret = ath11k_mac_vdev_setup_sync(ar);
> +	if (ret)
> +		ath11k_warn(ar->ab, "failed to synchronize monitor vdev %i stop: %d\n",
> +			    ar->monitor_vdev_id, ret);
> +
> +	ret = ath11k_wmi_vdev_down(ar, ar->monitor_vdev_id);
> +	if (ret)
> +		ath11k_warn(ar->ab, "failed to put down monitor vdev %i: %d\n",
> +			    ar->monitor_vdev_id, ret);
> +
> +	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i stopped\n",
> +		   ar->monitor_vdev_id);
> +	return ret;
> +}

I was not sure what's the idea of error path handling here, we print
warnings but still continue the normal execution. I changed this so that
we bail out in the first error and if everything goes well we return 0.

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Re: [PATCH 3/3] ath11k: monitor mode clean up to use separate APIs

[Kalle Valo]

Kalle Valo <kvalo@codeaurora.org> writes:

> Jouni Malinen <jouni@codeaurora.org> writes:
>
>> From: Seevalamuthu Mariappan <seevalam@codeaurora.org>
>>
>> If monitor interface is enabled in co-exist mode, only local traffic are
>> captured. It's caused by missing monitor vdev in co-exist mode. So,
>> monitor mode clean up is done with separate Monitor APIs. For this,
>> introduce monitor_started and monitor_vdev_created boolean flags.
>>
>> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01725-QCAHKSWPL_SILICONZ-1
>>
>> Co-developed-by: Miles Hu <milehu@codeaurora.org>
>> Signed-off-by: Miles Hu <milehu@codeaurora.org>
>> Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
>> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
>> Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
>> Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
>> ---
>>  drivers/net/wireless/ath/ath11k/core.h  |   5 --
>>  drivers/net/wireless/ath/ath11k/dp_rx.c |   2 +-
>>  drivers/net/wireless/ath/ath11k/dp_tx.c |   9 +-
>>  drivers/net/wireless/ath/ath11k/mac.c   | 112 ++++++++++++++----------
>>  4 files changed, 73 insertions(+), 55 deletions(-)
>>
>> diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
>> index 3cddab695031..0ad5a935b52b 100644
>> --- a/drivers/net/wireless/ath/ath11k/core.h
>> +++ b/drivers/net/wireless/ath/ath11k/core.h
>> @@ -192,10 +192,6 @@ enum ath11k_dev_flags {
>>  	ATH11K_FLAG_HTC_SUSPEND_COMPLETE,
>>  };
>>  
>> -enum ath11k_monitor_flags {
>> -	ATH11K_FLAG_MONITOR_ENABLED,
>> -};
>> -
>>  struct ath11k_vif {
>>  	u32 vdev_id;
>>  	enum wmi_vdev_type vdev_type;
>> @@ -478,7 +474,6 @@ struct ath11k {
>>  
>>  	unsigned long dev_flags;
>>  	unsigned int filter_flags;
>> -	unsigned long monitor_flags;
>>  	u32 min_tx_power;
>>  	u32 max_tx_power;
>>  	u32 txpower_limit_2g;
>> diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
>> index 9a224817630a..6fde70914e1a 100644
>> --- a/drivers/net/wireless/ath/ath11k/dp_rx.c
>> +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
>> @@ -5029,7 +5029,7 @@ int ath11k_dp_rx_process_mon_rings(struct ath11k_base *ab, int mac_id,
>>  	struct ath11k *ar = ath11k_ab_to_ar(ab, mac_id);
>>  	int ret = 0;
>>  
>> -	if (test_bit(ATH11K_FLAG_MONITOR_ENABLED, &ar->monitor_flags))
>> +	if (ar->monitor_started)
>>  		ret = ath11k_dp_mon_process_rx(ab, mac_id, napi, budget);
>>  	else
>>  		ret = ath11k_dp_rx_process_mon_status(ab, mac_id, napi, budget);
>
> Moving from test_bit() to a boolean looks racy to me, I don't see how
> monitor_started is serialised.
>
> And why move away from monitor_flags and having separate booleans
> anyway? I would monitor_conf_enabled and monitor_started from patch 2 to
> use monitor_flags.

In the pending branch I changed back to monitor_flags.

>> @@ -1076,11 +1076,16 @@ int ath11k_dp_tx_htt_monitor_mode_ring_config(struct ath11k *ar, bool reset)
>>  
>>  	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
>>  		ring_id = dp->rx_mon_status_refill_ring[i].refill_buf_ring.ring_id;
>> -		if (!reset)
>> +		if (!reset) {
>>  			tlv_filter.rx_filter =
>>  					HTT_RX_MON_FILTER_TLV_FLAGS_MON_STATUS_RING;
>> -		else
>> +		} else {
>>  			tlv_filter = ath11k_mac_mon_status_filter_default;
>> +#ifdef CONFIG_ATH11K_DEBUGFS
>> +			if (ar->debug.extd_rx_stats)
>> +				tlv_filter.rx_filter = ar->debug.rx_filter;
>> +#endif
>
> This should use ath11k_debugfs_is_extd_rx_stats_enabled and
> ath11k_debugfs_rx_filter(), then the ifdef is not needed.

I also fixed this in the pending branch.

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Re: [PATCH 2/3] ath11k: add separate APIs for monitor mode

[Kalle Valo]

Kalle Valo <kvalo@codeaurora.org> writes:

>> +vdev_stop:
>> +	reinit_completion(&ar->vdev_setup_done);
>> +
>> +	ret = ath11k_wmi_vdev_stop(ar, vdev_id);
>> +	if (ret) {
>> +		ath11k_warn(ar->ab, "failed to stop monitor vdev %i after start failure: %d\n",
>> +			    vdev_id, ret);
>> +		return ret;
>> +	}
>> +
>> +	ret = ath11k_mac_vdev_setup_sync(ar);
>> +	if (ret)
>> +		ath11k_warn(ar->ab, "failed to synchronize setup for vdev %i stop: %d\n",
>> +			    vdev_id, ret);
>
> I added return ret here for consistency..
>
>> +	return ret;
>
> I don't thinks this is right, in an error path (vdev_stop label) we
> return 0? I changed this to -EIO.
>
>> +static int ath11k_mac_monitor_vdev_stop(struct ath11k *ar)
>> +{
>> +	int ret;
>> +
>> +	lockdep_assert_held(&ar->conf_mutex);
>> +
>> +	reinit_completion(&ar->vdev_setup_done);
>> +
>> +	ret = ath11k_wmi_vdev_stop(ar, ar->monitor_vdev_id);
>> +	if (ret)
>> +		ath11k_warn(ar->ab, "failed to request monitor vdev %i stop: %d\n",
>> +			    ar->monitor_vdev_id, ret);
>> +
>> +	ret = ath11k_mac_vdev_setup_sync(ar);
>> +	if (ret)
>> + ath11k_warn(ar->ab, "failed to synchronize monitor vdev %i stop:
>> %d\n",
>> +			    ar->monitor_vdev_id, ret);
>> +
>> +	ret = ath11k_wmi_vdev_down(ar, ar->monitor_vdev_id);
>> +	if (ret)
>> +		ath11k_warn(ar->ab, "failed to put down monitor vdev %i: %d\n",
>> +			    ar->monitor_vdev_id, ret);
>> +
>> +	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i stopped\n",
>> +		   ar->monitor_vdev_id);
>> +	return ret;
>> +}
>
> I was not sure what's the idea of error path handling here, we print
> warnings but still continue the normal execution. I changed this so that
> we bail out in the first error and if everything goes well we return 0.

I found quite a few missing error checks, too many to list here but
fixed in the pending branch:

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=8b2f8d11422e7909ff02db456cda41728f621de4

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=5ff318be206b3d2a0bfdcfaf0ac52cc3b4ecdeae

Please double check, compile tested only.

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Re: [PATCH 2/3] ath11k: add separate APIs for monitor mode

[Seevalamuthu Mariappan]

On 2021-09-21 21:25, Kalle Valo wrote:
> Kalle Valo <kvalo@codeaurora.org> writes:
> 
>>> +vdev_stop:
>>> +	reinit_completion(&ar->vdev_setup_done);
>>> +
>>> +	ret = ath11k_wmi_vdev_stop(ar, vdev_id);
>>> +	if (ret) {
>>> +		ath11k_warn(ar->ab, "failed to stop monitor vdev %i after start 
>>> failure: %d\n",
>>> +			    vdev_id, ret);
>>> +		return ret;
>>> +	}
>>> +
>>> +	ret = ath11k_mac_vdev_setup_sync(ar);
>>> +	if (ret)
>>> +		ath11k_warn(ar->ab, "failed to synchronize setup for vdev %i stop: 
>>> %d\n",
>>> +			    vdev_id, ret);
>> 
>> I added return ret here for consistency..
>> 
>>> +	return ret;
>> 
>> I don't thinks this is right, in an error path (vdev_stop label) we
>> return 0? I changed this to -EIO.
>> 
>>> +static int ath11k_mac_monitor_vdev_stop(struct ath11k *ar)
>>> +{
>>> +	int ret;
>>> +
>>> +	lockdep_assert_held(&ar->conf_mutex);
>>> +
>>> +	reinit_completion(&ar->vdev_setup_done);
>>> +
>>> +	ret = ath11k_wmi_vdev_stop(ar, ar->monitor_vdev_id);
>>> +	if (ret)
>>> +		ath11k_warn(ar->ab, "failed to request monitor vdev %i stop: 
>>> %d\n",
>>> +			    ar->monitor_vdev_id, ret);
>>> +
>>> +	ret = ath11k_mac_vdev_setup_sync(ar);
>>> +	if (ret)
>>> + ath11k_warn(ar->ab, "failed to synchronize monitor vdev %i stop:
>>> %d\n",
>>> +			    ar->monitor_vdev_id, ret);
>>> +
>>> +	ret = ath11k_wmi_vdev_down(ar, ar->monitor_vdev_id);
>>> +	if (ret)
>>> +		ath11k_warn(ar->ab, "failed to put down monitor vdev %i: %d\n",
>>> +			    ar->monitor_vdev_id, ret);
>>> +
>>> +	ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac monitor vdev %i stopped\n",
>>> +		   ar->monitor_vdev_id);
>>> +	return ret;
>>> +}
>> 
>> I was not sure what's the idea of error path handling here, we print
>> warnings but still continue the normal execution. I changed this so 
>> that
>> we bail out in the first error and if everything goes well we return 
>> 0.
> 
> I found quite a few missing error checks, too many to list here but
> fixed in the pending branch:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=8b2f8d11422e7909ff02db456cda41728f621de4
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=5ff318be206b3d2a0bfdcfaf0ac52cc3b4ecdeae
> 
> Please double check, compile tested only.

Thanks for the fixes Kalle. It looks fine and tested the same.

Regards,
Seevalamuthu M

Re: [PATCH 1/3] ath11k: move static function ath11k_mac_vdev_setup_sync to top

[Kalle Valo]

Jouni Malinen <jouni@codeaurora.org> wrote:

> This is to prepare for monitor mode clean up.
> No functional changes are done.
> 
> Co-developed-by: Miles Hu <milehu@codeaurora.org>
> Signed-off-by: Miles Hu <milehu@codeaurora.org>
> Co-developed-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Seevalamuthu Mariappan <seevalam@codeaurora.org>
> Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

3 patches applied to ath-next branch of ath.git, thanks.

d37b4862312c ath11k: move static function ath11k_mac_vdev_setup_sync to top
64e06b78a927 ath11k: add separate APIs for monitor mode
689a5e6fff75 ath11k: monitor mode clean up to use separate APIs

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