[PATCH 0/8] iwlwifi: updates intended for v5.2 2019-03-09

[PATCH 0/8] iwlwifi: updates intended for v5.2 2019-03-09

[Luca Coelho]

From: Luca Coelho <luciano.coelho@intel.com>

Hi,

Here's the first set of patches intended for v5.2.  This one only
contains some patches that were pending on mac80211/cfg80211/radiotap
patches being merged.  Now that the all the dependencies are in place,
the iwlwifi patches can be merged.

The changes are:

    * Send NO_DATA events so they can be captured in radiotap;
    * Some channel-switch changes;
    * Support for multiple BSSID;

As usual, I'm pushing this to a pending branch, for kbuild bot, and
will send a pull-request later.

Please review.

Cheers,
Luca.


Johannes Berg (1):
  iwlwifi: mvm: report all NO_DATA events to mac80211

Sara Sharon (7):
  iwlwifi: mvm: report delayed beacon count to FW
  iwlwifi: mvm: implement CSA abort
  iwlwifi: mvm: track CSA beacons
  iwlwifi: mvm: notify FW on quiet mode in CSA
  iwlwifi: mvm: disconnect in case of bad channel switch parameters
  iwlwifi: mvm: track changes in beacon count during channel switch
  iwlwifi: mvm: support multiple BSSID

 drivers/net/wireless/intel/iwlwifi/fw/file.h  |   2 +
 .../net/wireless/intel/iwlwifi/mvm/mac-ctxt.c |   7 +-
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 190 ++++++++++++++----
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h  |  11 +-
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c  |   6 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c |  31 ++-
 .../wireless/intel/iwlwifi/mvm/time-event.c   |   5 +-
 7 files changed, 187 insertions(+), 65 deletions(-)

-- 
2.20.1

[PATCH 1/8] iwlwifi: mvm: report delayed beacon count to FW

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

Support passing to FW delayed beacon count. This
represents the delay the AP can have when moving to
the new channel.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 3a92c09d4692..1bdc27d07d74 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4473,6 +4473,10 @@ static int iwl_mvm_schedule_client_csa(struct iwl_mvm *mvm,
 
 	lockdep_assert_held(&mvm->mutex);
 
+	if (chsw->delay)
+		cmd.cs_delayed_bcn_count =
+			DIV_ROUND_UP(chsw->delay, vif->bss_conf.beacon_int);
+
 	return iwl_mvm_send_cmd_pdu(mvm,
 				    WIDE_ID(MAC_CONF_GROUP,
 					    CHANNEL_SWITCH_TIME_EVENT_CMD),
-- 
2.20.1

[PATCH 2/8] iwlwifi: mvm: implement CSA abort

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

In case we receive abort operation for CSA, clean up
our state.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 1bdc27d07d74..b5a9e83cc034 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4631,6 +4631,29 @@ static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
 	return ret;
 }
 
+static void iwl_mvm_abort_channel_switch(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_chan_switch_te_cmd cmd = {
+		.mac_id = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
+							  mvmvif->color)),
+		.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
+	};
+
+	IWL_DEBUG_MAC80211(mvm, "Abort CSA on mac %d\n", mvmvif->id);
+
+	mutex_lock(&mvm->mutex);
+	WARN_ON(iwl_mvm_send_cmd_pdu(mvm,
+				     WIDE_ID(MAC_CONF_GROUP,
+					     CHANNEL_SWITCH_TIME_EVENT_CMD),
+				     0, sizeof(cmd), &cmd));
+	mutex_unlock(&mvm->mutex);
+
+	WARN_ON(iwl_mvm_post_channel_switch(hw, vif));
+}
+
 static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
 {
 	int i;
@@ -5087,6 +5110,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 	.channel_switch = iwl_mvm_channel_switch,
 	.pre_channel_switch = iwl_mvm_pre_channel_switch,
 	.post_channel_switch = iwl_mvm_post_channel_switch,
+	.abort_channel_switch = iwl_mvm_abort_channel_switch,
 
 	.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
 	.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
-- 
2.20.1

[PATCH 3/8] iwlwifi: mvm: report all NO_DATA events to mac80211

[Luca Coelho]

From: Johannes Berg <johannes.berg@intel.com>

Report all NO_DATA events to mac80211 so they get captured
in radiotap for usage in sniffer scenarios; map the info
type to a reasonable radiotap type for this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h  |  8 ++---
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c  |  6 ++--
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 31 ++++++++++++-------
 3 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index bca6f6b536d9..dd70bdc27d58 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018        Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018        Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1650,8 +1650,8 @@ void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
 			struct iwl_rx_cmd_buffer *rxb);
 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 			struct iwl_rx_cmd_buffer *rxb, int queue);
-void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi,
-			    struct iwl_rx_cmd_buffer *rxb, int queue);
+void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi,
+				struct iwl_rx_cmd_buffer *rxb, int queue);
 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
 			      struct iwl_rx_cmd_buffer *rxb, int queue);
 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index ba27dce4c2bb..ad8dea01c638 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018        Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018        Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1105,7 +1105,7 @@ static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
 	else if (cmd == WIDE_ID(LEGACY_GROUP, FRAME_RELEASE))
 		iwl_mvm_rx_frame_release(mvm, napi, rxb, 0);
 	else if (cmd == WIDE_ID(DATA_PATH_GROUP, RX_NO_DATA_NOTIF))
-		iwl_mvm_rx_monitor_ndp(mvm, napi, rxb, 0);
+		iwl_mvm_rx_monitor_no_data(mvm, napi, rxb, 0);
 	else
 		iwl_mvm_rx_common(mvm, rxb, pkt);
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 1e03acf30762..0b1b208de767 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1679,8 +1679,8 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 	rcu_read_unlock();
 }
 
-void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi,
-			    struct iwl_rx_cmd_buffer *rxb, int queue)
+void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi,
+				struct iwl_rx_cmd_buffer *rxb, int queue)
 {
 	struct ieee80211_rx_status *rx_status;
 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
@@ -1701,10 +1701,6 @@ void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi,
 	if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 		return;
 
-	/* Currently only NDP type is supported */
-	if (info_type != RX_NO_DATA_INFO_TYPE_NDP)
-		return;
-
 	energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS;
 	energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS;
 	channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS;
@@ -1726,9 +1722,22 @@ void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi,
 
 	/* 0-length PSDU */
 	rx_status->flag |= RX_FLAG_NO_PSDU;
-	/* currently this is the only type for which we get this notif */
-	rx_status->zero_length_psdu_type =
-		IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING;
+
+	switch (info_type) {
+	case RX_NO_DATA_INFO_TYPE_NDP:
+		rx_status->zero_length_psdu_type =
+			IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING;
+		break;
+	case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED:
+	case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED:
+		rx_status->zero_length_psdu_type =
+			IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED;
+		break;
+	default:
+		rx_status->zero_length_psdu_type =
+			IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR;
+		break;
+	}
 
 	/* This may be overridden by iwl_mvm_rx_he() to HE_RU */
 	switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
-- 
2.20.1

[PATCH 4/8] iwlwifi: mvm: track CSA beacons

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

Send to FW modify command for every beacon we receive during channel
switch. FW will track the count, and make sure the event is scheduled
in time even if AP changed count.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/fw/file.h  |  2 ++
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 30 +++++++++++++++++--
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/file.h b/drivers/net/wireless/intel/iwlwifi/fw/file.h
index 641c95d03b15..04ad6b96a28b 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/file.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/file.h
@@ -350,6 +350,7 @@ typedef unsigned int __bitwise iwl_ucode_tlv_capa_t;
  * IWL_UCODE_TLV_CAPA_CHANNEL_SWITCH_CMD: firmware supports CSA command
  * @IWL_UCODE_TLV_CAPA_ULTRA_HB_CHANNELS: firmware supports ultra high band
  *	(6 GHz).
+ * @IWL_UCODE_TLV_CAPA_CS_MODIFY: firmware supports modify action CSA command
  * @IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE: extended DTS measurement
  * @IWL_UCODE_TLV_CAPA_SHORT_PM_TIMEOUTS: supports short PM timeouts
  * @IWL_UCODE_TLV_CAPA_BT_MPLUT_SUPPORT: supports bt-coex Multi-priority LUT
@@ -420,6 +421,7 @@ enum iwl_ucode_tlv_capa {
 	IWL_UCODE_TLV_CAPA_CHANNEL_SWITCH_CMD		= (__force iwl_ucode_tlv_capa_t)46,
 	IWL_UCODE_TLV_CAPA_ULTRA_HB_CHANNELS		= (__force iwl_ucode_tlv_capa_t)48,
 	IWL_UCODE_TLV_CAPA_FTM_CALIBRATED		= (__force iwl_ucode_tlv_capa_t)47,
+	IWL_UCODE_TLV_CAPA_CS_MODIFY			= (__force iwl_ucode_tlv_capa_t)49,
 
 	/* set 2 */
 	IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE		= (__force iwl_ucode_tlv_capa_t)64,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index b5a9e83cc034..d5f627621593 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018        Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018        Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -4631,6 +4631,31 @@ static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
 	return ret;
 }
 
+static void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw,
+					     struct ieee80211_vif *vif,
+					     struct ieee80211_channel_switch *chsw)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_chan_switch_te_cmd cmd = {
+		.mac_id = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
+							  mvmvif->color)),
+		.action = cpu_to_le32(FW_CTXT_ACTION_MODIFY),
+		.tsf = cpu_to_le32(chsw->timestamp),
+		.cs_count = chsw->count,
+	};
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CS_MODIFY))
+		return;
+
+	IWL_DEBUG_MAC80211(mvm, "Modify CSA on mac %d\n", mvmvif->id);
+
+	WARN_ON(iwl_mvm_send_cmd_pdu(mvm,
+				     WIDE_ID(MAC_CONF_GROUP,
+					     CHANNEL_SWITCH_TIME_EVENT_CMD),
+				     CMD_ASYNC, sizeof(cmd), &cmd));
+}
+
 static void iwl_mvm_abort_channel_switch(struct ieee80211_hw *hw,
 					 struct ieee80211_vif *vif)
 {
@@ -5111,6 +5136,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 	.pre_channel_switch = iwl_mvm_pre_channel_switch,
 	.post_channel_switch = iwl_mvm_post_channel_switch,
 	.abort_channel_switch = iwl_mvm_abort_channel_switch,
+	.channel_switch_rx_beacon = iwl_mvm_channel_switch_rx_beacon,
 
 	.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
 	.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
-- 
2.20.1

[PATCH 5/8] iwlwifi: mvm: notify FW on quiet mode in CSA

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

Let FW know if quiet mode is on or not. This is needed
in order to disable it in FW when CSA is complete.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index d5f627621593..5d56c6008787 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4469,6 +4469,7 @@ static int iwl_mvm_schedule_client_csa(struct iwl_mvm *mvm,
 		.action = cpu_to_le32(FW_CTXT_ACTION_ADD),
 		.tsf = cpu_to_le32(chsw->timestamp),
 		.cs_count = chsw->count,
+		.cs_mode = chsw->block_tx,
 	};
 
 	lockdep_assert_held(&mvm->mutex);
@@ -4643,6 +4644,7 @@ static void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw,
 		.action = cpu_to_le32(FW_CTXT_ACTION_MODIFY),
 		.tsf = cpu_to_le32(chsw->timestamp),
 		.cs_count = chsw->count,
+		.cs_mode = chsw->block_tx,
 	};
 
 	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CS_MODIFY))
-- 
2.20.1

[PATCH 6/8] iwlwifi: mvm: disconnect in case of bad channel switch parameters

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

In case we receive channel switch announcement with immediate
quiet and unknown switching time, we will switch when FW identifies
AP left channel. However, if AP remains on channel, we will
eventually get TX queue hang. Init a work to disconnect if
switch doesn't occur within 1500 milliseconds. Do it also
for a too long channel switch.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 .../net/wireless/intel/iwlwifi/mvm/mac-ctxt.c |   7 +-
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 171 ++++++++++--------
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h  |   1 +
 .../wireless/intel/iwlwifi/mvm/time-event.c   |   5 +-
 4 files changed, 107 insertions(+), 77 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
index 6a70dece447d..f24d73700ad6 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1573,6 +1573,7 @@ void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
 
 	rcu_read_lock();
 	vif = rcu_dereference(mvm->vif_id_to_mac[mac_id]);
+	mvmvif = iwl_mvm_vif_from_mac80211(vif);
 
 	switch (vif->type) {
 	case NL80211_IFTYPE_AP:
@@ -1581,7 +1582,6 @@ void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
 			    csa_vif != vif))
 			goto out_unlock;
 
-		mvmvif = iwl_mvm_vif_from_mac80211(csa_vif);
 		csa_id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
 		if (WARN(csa_id != id_n_color,
 			 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
@@ -1602,6 +1602,7 @@ void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
 		return;
 	case NL80211_IFTYPE_STATION:
 		iwl_mvm_csa_client_absent(mvm, vif);
+		cancel_delayed_work_sync(&mvmvif->csa_work);
 		ieee80211_chswitch_done(vif, true);
 		break;
 	default:
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 5d56c6008787..af71e58bdd24 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -1500,6 +1500,91 @@ static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
 }
 
+static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif)
+{
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	int ret;
+
+	mutex_lock(&mvm->mutex);
+
+	if (mvmvif->csa_failed) {
+		mvmvif->csa_failed = false;
+		ret = -EIO;
+		goto out_unlock;
+	}
+
+	if (vif->type == NL80211_IFTYPE_STATION) {
+		struct iwl_mvm_sta *mvmsta;
+
+		mvmvif->csa_bcn_pending = false;
+		mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
+							  mvmvif->ap_sta_id);
+
+		if (WARN_ON(!mvmsta)) {
+			ret = -EIO;
+			goto out_unlock;
+		}
+
+		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
+
+		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
+
+		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
+		if (ret)
+			goto out_unlock;
+
+		iwl_mvm_stop_session_protection(mvm, vif);
+	}
+
+	mvmvif->ps_disabled = false;
+
+	ret = iwl_mvm_power_update_ps(mvm);
+
+out_unlock:
+	mutex_unlock(&mvm->mutex);
+
+	return ret;
+}
+
+static void iwl_mvm_abort_channel_switch(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_chan_switch_te_cmd cmd = {
+		.mac_id = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
+							  mvmvif->color)),
+		.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
+	};
+
+	IWL_DEBUG_MAC80211(mvm, "Abort CSA on mac %d\n", mvmvif->id);
+
+	mutex_lock(&mvm->mutex);
+	WARN_ON(iwl_mvm_send_cmd_pdu(mvm,
+				     WIDE_ID(MAC_CONF_GROUP,
+					     CHANNEL_SWITCH_TIME_EVENT_CMD),
+				     0, sizeof(cmd), &cmd));
+	mutex_unlock(&mvm->mutex);
+
+	WARN_ON(iwl_mvm_post_channel_switch(hw, vif));
+}
+
+static void iwl_mvm_channel_switch_disconnect_wk(struct work_struct *wk)
+{
+	struct iwl_mvm *mvm;
+	struct iwl_mvm_vif *mvmvif;
+	struct ieee80211_vif *vif;
+
+	mvmvif = container_of(wk, struct iwl_mvm_vif, csa_work.work);
+	vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
+	mvm = mvmvif->mvm;
+
+	iwl_mvm_abort_channel_switch(mvm->hw, vif);
+	ieee80211_chswitch_done(vif, false);
+}
+
 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 				     struct ieee80211_vif *vif)
 {
@@ -1626,6 +1711,8 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 	}
 
 	iwl_mvm_tcm_add_vif(mvm, vif);
+	INIT_DELAYED_WORK(&mvmvif->csa_work,
+			  iwl_mvm_channel_switch_disconnect_wk);
 
 	if (vif->type == NL80211_IFTYPE_MONITOR)
 		mvm->monitor_on = true;
@@ -4484,6 +4571,7 @@ static int iwl_mvm_schedule_client_csa(struct iwl_mvm *mvm,
 				    0, sizeof(cmd), &cmd);
 }
 
+#define IWL_MAX_CSA_BLOCK_TX 1500
 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
 				      struct ieee80211_vif *vif,
 				      struct ieee80211_channel_switch *chsw)
@@ -4548,8 +4636,18 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
 				((vif->bss_conf.beacon_int * (chsw->count - 1) -
 				  IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
 
-		if (chsw->block_tx)
+		if (chsw->block_tx) {
 			iwl_mvm_csa_client_absent(mvm, vif);
+			/*
+			 * In case of undetermined / long time with immediate
+			 * quiet monitor status to gracefully disconnect
+			 */
+			if (!chsw->count ||
+			    chsw->count * vif->bss_conf.beacon_int >
+			    IWL_MAX_CSA_BLOCK_TX)
+				schedule_delayed_work(&mvmvif->csa_work,
+						      msecs_to_jiffies(IWL_MAX_CSA_BLOCK_TX));
+		}
 
 		if (mvmvif->bf_data.bf_enabled) {
 			ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
@@ -4584,54 +4682,6 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
 	return ret;
 }
 
-static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
-				       struct ieee80211_vif *vif)
-{
-	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
-	int ret;
-
-	mutex_lock(&mvm->mutex);
-
-	if (mvmvif->csa_failed) {
-		mvmvif->csa_failed = false;
-		ret = -EIO;
-		goto out_unlock;
-	}
-
-	if (vif->type == NL80211_IFTYPE_STATION) {
-		struct iwl_mvm_sta *mvmsta;
-
-		mvmvif->csa_bcn_pending = false;
-		mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
-							  mvmvif->ap_sta_id);
-
-		if (WARN_ON(!mvmsta)) {
-			ret = -EIO;
-			goto out_unlock;
-		}
-
-		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
-
-		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
-
-		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
-		if (ret)
-			goto out_unlock;
-
-		iwl_mvm_stop_session_protection(mvm, vif);
-	}
-
-	mvmvif->ps_disabled = false;
-
-	ret = iwl_mvm_power_update_ps(mvm);
-
-out_unlock:
-	mutex_unlock(&mvm->mutex);
-
-	return ret;
-}
-
 static void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw,
 					     struct ieee80211_vif *vif,
 					     struct ieee80211_channel_switch *chsw)
@@ -4658,29 +4708,6 @@ static void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw,
 				     CMD_ASYNC, sizeof(cmd), &cmd));
 }
 
-static void iwl_mvm_abort_channel_switch(struct ieee80211_hw *hw,
-					 struct ieee80211_vif *vif)
-{
-	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
-	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-	struct iwl_chan_switch_te_cmd cmd = {
-		.mac_id = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
-							  mvmvif->color)),
-		.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
-	};
-
-	IWL_DEBUG_MAC80211(mvm, "Abort CSA on mac %d\n", mvmvif->id);
-
-	mutex_lock(&mvm->mutex);
-	WARN_ON(iwl_mvm_send_cmd_pdu(mvm,
-				     WIDE_ID(MAC_CONF_GROUP,
-					     CHANNEL_SWITCH_TIME_EVENT_CMD),
-				     0, sizeof(cmd), &cmd));
-	mutex_unlock(&mvm->mutex);
-
-	WARN_ON(iwl_mvm_post_channel_switch(hw, vif));
-}
-
 static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
 {
 	int i;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index dd70bdc27d58..79d7fcb95b6f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -490,6 +490,7 @@ struct iwl_mvm_vif {
 	bool csa_countdown;
 	bool csa_failed;
 	u16 csa_target_freq;
+	struct delayed_work csa_work;
 
 	/* Indicates that we are waiting for a beacon on a new channel */
 	bool csa_bcn_pending;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
index 9693fa4cdc39..50314018d157 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -234,6 +234,7 @@ iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
 			break;
 		}
 		iwl_mvm_csa_client_absent(mvm, te_data->vif);
+		cancel_delayed_work_sync(&mvmvif->csa_work);
 		ieee80211_chswitch_done(te_data->vif, true);
 		break;
 	default:
-- 
2.20.1

[PATCH 7/8] iwlwifi: mvm: track changes in beacon count during channel switch

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

There are some buggy APs that keeps changing the count while forcing
us to block TX. This eventually results in queue hang, assert, and
disconnection. Detect such APs and disconnect gracefully in advance.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 15 +++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h      |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index af71e58bdd24..e18b57c84dd2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4662,6 +4662,9 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
 			iwl_mvm_schedule_csa_period(mvm, vif,
 						    vif->bss_conf.beacon_int,
 						    apply_time);
+
+		mvmvif->csa_count = chsw->count;
+		mvmvif->csa_misbehave = false;
 		break;
 	default:
 		break;
@@ -4700,6 +4703,18 @@ static void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw,
 	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CS_MODIFY))
 		return;
 
+	if (chsw->count >= mvmvif->csa_count && chsw->block_tx) {
+		if (mvmvif->csa_misbehave) {
+			/* Second time, give up on this AP*/
+			iwl_mvm_abort_channel_switch(hw, vif);
+			ieee80211_chswitch_done(vif, false);
+			mvmvif->csa_misbehave = false;
+			return;
+		}
+		mvmvif->csa_misbehave = true;
+	}
+	mvmvif->csa_count = chsw->count;
+
 	IWL_DEBUG_MAC80211(mvm, "Modify CSA on mac %d\n", mvmvif->id);
 
 	WARN_ON(iwl_mvm_send_cmd_pdu(mvm,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 79d7fcb95b6f..4e179e69fd32 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -490,6 +490,8 @@ struct iwl_mvm_vif {
 	bool csa_countdown;
 	bool csa_failed;
 	u16 csa_target_freq;
+	u16 csa_count;
+	u16 csa_misbehave;
 	struct delayed_work csa_work;
 
 	/* Indicates that we are waiting for a beacon on a new channel */
-- 
2.20.1

[PATCH 8/8] iwlwifi: mvm: support multiple BSSID

[Luca Coelho]

From: Sara Sharon <sara.sharon@intel.com>

Set the capabilities flags and inform firmware

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index e18b57c84dd2..fd989c43df2a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -420,6 +420,7 @@ int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 
 const static u8 he_if_types_ext_capa_sta[] = {
 	 [0] = WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING,
+	 [2] = WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT,
 	 [7] = WLAN_EXT_CAPA8_OPMODE_NOTIF,
 	 [9] = WLAN_EXT_CAPA10_TWT_REQUESTER_SUPPORT,
 };
@@ -732,6 +733,9 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 		hw->wiphy->iftype_ext_capab = he_iftypes_ext_capa;
 		hw->wiphy->num_iftype_ext_capab =
 			ARRAY_SIZE(he_iftypes_ext_capa);
+
+		ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
+		ieee80211_hw_set(hw, SUPPORTS_ONLY_HE_MULTI_BSSID);
 	}
 
 	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
@@ -2395,7 +2399,11 @@ static void iwl_mvm_cfg_he_sta(struct iwl_mvm *mvm,
 			(vif->bss_conf.uora_ocw_range >> 3) & 0x7;
 	}
 
-	/* TODO: support Multi BSSID IE */
+	if (vif->bss_conf.nontransmitted) {
+		flags |= STA_CTXT_HE_REF_BSSID_VALID;
+		ether_addr_copy(sta_ctxt_cmd.ref_bssid_addr,
+				vif->bss_conf.transmitter_bssid);
+	}
 
 	sta_ctxt_cmd.flags = cpu_to_le32(flags);
 
-- 
2.20.1