[PATCH 00/15] iwlwifi: updates intended for v4.16 2017-12-02

[PATCH 00/15] iwlwifi: updates intended for v4.16 2017-12-02

[Luca Coelho]

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

Hi,

Here's the second batch of patches intended for 4.16.  Nothing major,
just continued development, some cleanups and small fixes here and
there.

* Initial work for rate-scaling offload;
* Support for new FW API version;
* Some couple of fixes here and there;
* Some old patches that had never made it to the mainline;

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

Please review.

Cheers,
Luca.


Avraham Stern (1):
  iwlwifi: mvm: add WFA vendor specific TPC report IE to probe request

David Spinadel (1):
  iwlwifi: mvm: enable RX offloading with TKIP and WEP

Emmanuel Grumbach (1):
  iwlwifi: mvm: remove set but unused variable in iwl_mvm_roc_done_wk

Gregory Greenman (7):
  iwlwifi: mvm: rs: introduce new API for rate scaling
  iwlwifi: mvm: rs: add ops for the new rate scaling in the FW
  iwlwifi: mvm: rs: add basic implementation of the new RS API handlers
  iwlwifi: mvm: rs: new rate scale API - add FW notifications
  iwlwifi: mvm: rs: new rate scale API - add debugfs hooks
  iwlwifi: mvm: rs: add size checks when printing to a buffer
  iwlwifi: mvm: rs: add sanity check when sending LQ command

Johannes Berg (1):
  iwlwifi: mvm: request statistics when reading debugfs

Liad Kaufman (1):
  iwlwifi: mvm: make init_dbg effective only on failure

Luca Coelho (1):
  iwlwifi: bump FW API to 36 for 8000 and up

Sara Sharon (2):
  iwlwifi: mvm: avoid dumping assert log when device is stopped
  iwlwifi: mvm: mark MIC stripped MPDUs

 drivers/net/wireless/intel/iwlwifi/cfg/22000.c     |   2 +-
 drivers/net/wireless/intel/iwlwifi/cfg/8000.c      |   4 +-
 drivers/net/wireless/intel/iwlwifi/cfg/9000.c      |   2 +-
 .../net/wireless/intel/iwlwifi/fw/api/datapath.h   |  15 ++
 drivers/net/wireless/intel/iwlwifi/fw/api/rs.h     | 262 +++++++++++++++++-
 drivers/net/wireless/intel/iwlwifi/fw/file.h       |   2 +
 drivers/net/wireless/intel/iwlwifi/iwl-trans.h     |   4 +-
 drivers/net/wireless/intel/iwlwifi/mvm/Makefile    |   2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c   |  79 +++++-
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c        |   8 +-
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c  |  13 +-
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h       |  10 +-
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c       |   9 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c     | 296 +++++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/rs.c        | 230 ++++++++--------
 drivers/net/wireless/intel/iwlwifi/mvm/rs.h        |  48 ++++
 drivers/net/wireless/intel/iwlwifi/mvm/rx.c        |   2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c      |  16 +-
 drivers/net/wireless/intel/iwlwifi/mvm/scan.c      |  35 ++-
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c       |  19 +-
 drivers/net/wireless/intel/iwlwifi/mvm/sta.h       |   7 +-
 .../net/wireless/intel/iwlwifi/mvm/time-event.c    |   9 +-
 drivers/net/wireless/intel/iwlwifi/mvm/tx.c        |   8 +-
 drivers/net/wireless/intel/iwlwifi/mvm/utils.c     |  14 +-
 24 files changed, 948 insertions(+), 148 deletions(-)
 create mode 100644 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c

-- 
2.15.0

[PATCH 01/15] iwlwifi: mvm: add WFA vendor specific TPC report IE to probe request

[Luca Coelho]

From: Avraham Stern <avraham.stern@intel.com>

Add the WFA vendor specific TPC report IE to probe requests
when it is not added by the FW. The FW will still need to set
the tx power field.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 35 ++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
index e4fd476e9ccb..356b16f40e78 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -664,6 +664,22 @@ static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 	return newpos;
 }
 
+#define WFA_TPC_IE_LEN	9
+
+static void iwl_mvm_add_tpc_report_ie(u8 *pos)
+{
+	pos[0] = WLAN_EID_VENDOR_SPECIFIC;
+	pos[1] = WFA_TPC_IE_LEN - 2;
+	pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
+	pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
+	pos[4] = WLAN_OUI_MICROSOFT & 0xff;
+	pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
+	pos[6] = 0;
+	/* pos[7] - tx power will be inserted by the FW */
+	pos[7] = 0;
+	pos[8] = 0;
+}
+
 static void
 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 			 struct ieee80211_scan_ies *ies,
@@ -716,7 +732,16 @@ iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 
 	memcpy(pos, ies->common_ies, ies->common_ie_len);
 	params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
-	params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
+
+	if (iwl_mvm_rrm_scan_needed(mvm) &&
+	    !fw_has_capa(&mvm->fw->ucode_capa,
+			 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
+		iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
+		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
+							   WFA_TPC_IE_LEN);
+	} else {
+		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
+	}
 }
 
 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
@@ -781,7 +806,9 @@ static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 	if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 		flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 
-	if (iwl_mvm_rrm_scan_needed(mvm))
+	if (iwl_mvm_rrm_scan_needed(mvm) &&
+	    fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 		flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 
 	if (params->pass_all)
@@ -1183,7 +1210,9 @@ static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
 	}
 
-	if (iwl_mvm_rrm_scan_needed(mvm))
+	if (iwl_mvm_rrm_scan_needed(mvm) &&
+	    fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
 
 	if (params->pass_all)
-- 
2.15.0

[PATCH 02/15] iwlwifi: bump FW API to 36 for 8000 and up

[Luca Coelho]

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

Load version 36 of the API for these devices, if available.  We
skipped version 35.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/cfg/22000.c | 2 +-
 drivers/net/wireless/intel/iwlwifi/cfg/8000.c  | 4 ++--
 drivers/net/wireless/intel/iwlwifi/cfg/9000.c  | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/22000.c b/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
index 28f6e63b9b67..48f6f80eb24b 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
@@ -55,7 +55,7 @@
 #include "iwl-agn-hw.h"
 
 /* Highest firmware API version supported */
-#define IWL_22000_UCODE_API_MAX	34
+#define IWL_22000_UCODE_API_MAX	36
 
 /* Lowest firmware API version supported */
 #define IWL_22000_UCODE_API_MIN	24
diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/8000.c b/drivers/net/wireless/intel/iwlwifi/cfg/8000.c
index 9bb7c19d48eb..3f4d9bac9f73 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/8000.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/8000.c
@@ -70,8 +70,8 @@
 #include "iwl-agn-hw.h"
 
 /* Highest firmware API version supported */
-#define IWL8000_UCODE_API_MAX	34
-#define IWL8265_UCODE_API_MAX	34
+#define IWL8000_UCODE_API_MAX	36
+#define IWL8265_UCODE_API_MAX	36
 
 /* Lowest firmware API version supported */
 #define IWL8000_UCODE_API_MIN	22
diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/9000.c b/drivers/net/wireless/intel/iwlwifi/cfg/9000.c
index e7e75b458005..90a1d14cf7d2 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/9000.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/9000.c
@@ -55,7 +55,7 @@
 #include "iwl-agn-hw.h"
 
 /* Highest firmware API version supported */
-#define IWL9000_UCODE_API_MAX	34
+#define IWL9000_UCODE_API_MAX	36
 
 /* Lowest firmware API version supported */
 #define IWL9000_UCODE_API_MIN	30
-- 
2.15.0

[PATCH 03/15] iwlwifi: mvm: remove set but unused variable in iwl_mvm_roc_done_wk

[Luca Coelho]

From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

Since the removal of non-DQA code, we don't need the queues
variable any more. Remove it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/time-event.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
index d3b8cb1e20b6..4de2ef809ccd 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
@@ -101,7 +101,6 @@ void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
 void iwl_mvm_roc_done_wk(struct work_struct *wk)
 {
 	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk);
-	u32 queues = 0;
 
 	/*
 	 * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit.
@@ -110,14 +109,10 @@ void iwl_mvm_roc_done_wk(struct work_struct *wk)
 	 * in the case that the time event actually completed in the firmware
 	 * (which is handled in iwl_mvm_te_handle_notif).
 	 */
-	if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) {
-		queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE);
+	if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 		iwl_mvm_unref(mvm, IWL_MVM_REF_ROC);
-	}
-	if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) {
-		queues |= BIT(mvm->aux_queue);
+	if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 		iwl_mvm_unref(mvm, IWL_MVM_REF_ROC_AUX);
-	}
 
 	synchronize_net();
 
-- 
2.15.0

[PATCH 04/15] iwlwifi: mvm: avoid dumping assert log when device is stopped

[Luca Coelho]

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

We might erroneously get to error dumping code when the
device is already stopped.

In that case the driver will detect a defective value and will try to
reset the HW, assuming it is only a bus issue.  The driver than
proceeds with the dumping.

The result has two side effects:

1. The device won't be stopped again, since the transport status is
already stopped, so the device remains powered on while it actually
should be stopped.

2. The dump in that case is completely garbaged and useless.

Detect and avoid this.  It will also make debugging such issues
easier.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index d46115e2d69e..79acb13f203a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -595,6 +595,12 @@ static void iwl_mvm_dump_lmac_error_log(struct iwl_mvm *mvm, u32 base)
 
 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
 {
+	if (!test_bit(STATUS_DEVICE_ENABLED, &mvm->trans->status)) {
+		IWL_ERR(mvm,
+			"DEVICE_ENABLED bit is not set. Aborting dump.\n");
+		return;
+	}
+
 	iwl_mvm_dump_lmac_error_log(mvm, mvm->error_event_table[0]);
 
 	if (mvm->error_event_table[1])
-- 
2.15.0

[PATCH 05/15] iwlwifi: mvm: rs: introduce new API for rate scaling

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

New devices will have rate scaling algorithm running in the firmware.
With this feature, the driver's responsiblity is to provide an initial
configuration and to handle notifications regarding recent rates and
some other parameters. Debugfs hooks will be still available for
reading the current rate/statistics and setting a fixed rate.
The old API is supported so far, though both APIs cannot be used
simultaneously.

This is the first patch in the series. It adds a new TLV specifying
FW support for the new API and updates lq_sta to support two types
of rate scaling.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/fw/file.h      |  2 ++
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c |  6 ++++
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h      |  2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rs.c       | 43 +++++++++++------------
 drivers/net/wireless/intel/iwlwifi/mvm/rs.h       | 33 ++++++++++++++++-
 drivers/net/wireless/intel/iwlwifi/mvm/rx.c       |  2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c     |  2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c      | 12 +++++--
 drivers/net/wireless/intel/iwlwifi/mvm/sta.h      |  7 +++-
 9 files changed, 79 insertions(+), 30 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/file.h b/drivers/net/wireless/intel/iwlwifi/fw/file.h
index 17367283f85f..4687d016f676 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/file.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/file.h
@@ -310,6 +310,7 @@ typedef unsigned int __bitwise iwl_ucode_tlv_capa_t;
  * @IWL_UCODE_TLV_CAPA_BT_COEX_RRC: supports BT Coex RRC
  * @IWL_UCODE_TLV_CAPA_GSCAN_SUPPORT: supports gscan
  * @IWL_UCODE_TLV_CAPA_STA_PM_NOTIF: firmware will send STA PM notification
+ * @IWL_UCODE_TLV_CAPA_TLC_OFFLOAD: firmware implements rate scaling algorithm
  * @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
@@ -364,6 +365,7 @@ enum iwl_ucode_tlv_capa {
 	IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT		= (__force iwl_ucode_tlv_capa_t)39,
 	IWL_UCODE_TLV_CAPA_CDB_SUPPORT			= (__force iwl_ucode_tlv_capa_t)40,
 	IWL_UCODE_TLV_CAPA_D0I3_END_FIRST		= (__force iwl_ucode_tlv_capa_t)41,
+	IWL_UCODE_TLV_CAPA_TLC_OFFLOAD                  = (__force iwl_ucode_tlv_capa_t)43,
 	IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE		= (__force iwl_ucode_tlv_capa_t)64,
 	IWL_UCODE_TLV_CAPA_SHORT_PM_TIMEOUTS		= (__force iwl_ucode_tlv_capa_t)65,
 	IWL_UCODE_TLV_CAPA_BT_MPLUT_SUPPORT		= (__force iwl_ucode_tlv_capa_t)67,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 5a646dc6ad87..4ff099f462fb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -420,6 +420,12 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 	ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 	ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
+
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD)) {
+		ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW);
+		ieee80211_hw_set(hw, HAS_RATE_CONTROL);
+	}
+
 	if (iwl_mvm_has_new_rx_api(mvm))
 		ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 59c5ec3f46cb..a565bae770b8 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1593,7 +1593,7 @@ int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init);
 void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg);
 int rs_pretty_print_rate(char *buf, const u32 rate);
 void rs_update_last_rssi(struct iwl_mvm *mvm,
-			 struct iwl_lq_sta *lq_sta,
+			 struct iwl_mvm_sta *mvmsta,
 			 struct ieee80211_rx_status *rx_status);
 
 /* power management */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index fbfa5eafcc93..739c47dbc6e8 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -809,7 +809,7 @@ static int rs_collect_tlc_data(struct iwl_mvm *mvm,
 		return -EINVAL;
 
 	if (tbl->column != RS_COLUMN_INVALID) {
-		struct lq_sta_pers *pers = &mvmsta->lq_sta.pers;
+		struct lq_sta_pers *pers = &mvmsta->lq_sta.rs_drv.pers;
 
 		pers->tx_stats[tbl->column][scale_index].total += attempts;
 		pers->tx_stats[tbl->column][scale_index].success += successes;
@@ -1206,7 +1206,7 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info);
 	u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
-	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
+	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
 
 	/* Treat uninitialized rate scaling data same as non-existing. */
 	if (!lq_sta) {
@@ -2785,9 +2785,10 @@ static void rs_get_initial_rate(struct iwl_mvm *mvm,
 
 /* Save info about RSSI of last Rx */
 void rs_update_last_rssi(struct iwl_mvm *mvm,
-			 struct iwl_lq_sta *lq_sta,
+			 struct iwl_mvm_sta *mvmsta,
 			 struct ieee80211_rx_status *rx_status)
 {
+	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
 	int i;
 
 	lq_sta->pers.chains = rx_status->chains;
@@ -2859,12 +2860,11 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
 static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
 			struct ieee80211_tx_rate_control *txrc)
 {
-	struct sk_buff *skb = txrc->skb;
-	struct iwl_op_mode *op_mode __maybe_unused =
-			(struct iwl_op_mode *)mvm_r;
+	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
+	struct sk_buff *skb = txrc->skb;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	struct iwl_lq_sta *lq_sta = mvm_sta;
+	struct iwl_lq_sta *lq_sta;
 	struct rs_rate *optimal_rate;
 	u32 last_ucode_rate;
 
@@ -2876,18 +2876,14 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
 		mvm_sta = NULL;
 	}
 
-	/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
-
-	/* Treat uninitialized rate scaling data same as non-existing. */
-	if (lq_sta && !lq_sta->pers.drv) {
-		IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
-		mvm_sta = NULL;
-	}
-
 	/* Send management frames and NO_ACK data using lowest rate. */
 	if (rate_control_send_low(sta, mvm_sta, txrc))
 		return;
 
+	if (!mvm_sta)
+		return;
+
+	lq_sta = mvm_sta;
 	iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags,
 				  info->band, &info->control.rates[0]);
 	info->control.rates[0].count = 1;
@@ -2910,7 +2906,7 @@ static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
 	struct iwl_mvm *mvm  = IWL_OP_MODE_GET_MVM(op_mode);
-	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
+	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
 
 	IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
 
@@ -2924,7 +2920,7 @@ static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
 	memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
 	lq_sta->pers.last_rssi = S8_MIN;
 
-	return &mvmsta->lq_sta;
+	return lq_sta;
 }
 
 static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
@@ -3117,7 +3113,7 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
 	struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
-	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
+	struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
 	struct ieee80211_supported_band *sband;
 	unsigned long supp; /* must be unsigned long for for_each_set_bit */
 
@@ -3383,7 +3379,7 @@ static void rs_bfer_active_iter(void *_data,
 {
 	struct rs_bfer_active_iter_data *data = _data;
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
-	struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq;
+	struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.rs_drv.lq;
 	u32 ss_params = le32_to_cpu(lq_cmd->ss_params);
 
 	if (sta == data->exclude_sta)
@@ -3495,7 +3491,8 @@ static void rs_set_lq_ss_params(struct iwl_mvm *mvm,
 
 	/* Disallow BFER on another STA if active and we're a higher priority */
 	if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {
-		struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq;
+		struct iwl_lq_cmd *bfersta_lq_cmd =
+			&bfer_mvmsta->lq_sta.rs_drv.lq;
 		u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);
 
 		bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;
@@ -3697,7 +3694,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
 
 	struct iwl_lq_sta *lq_sta = file->private_data;
 	struct iwl_mvm_sta *mvmsta =
-		container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
+		container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
 	struct iwl_mvm *mvm;
 	struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
 	struct rs_rate *rate = &tbl->rate;
@@ -3990,7 +3987,7 @@ static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
 	struct iwl_lq_sta *lq_sta = priv_sta;
 	struct iwl_mvm_sta *mvmsta;
 
-	mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
+	mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
 
 	if (!mvmsta->vif)
 		return;
@@ -4065,7 +4062,7 @@ void iwl_mvm_rate_control_unregister(void)
 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 			  bool enable)
 {
-	struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq;
+	struct iwl_lq_cmd *lq = &mvmsta->lq_sta.rs_drv.lq;
 
 	lockdep_assert_held(&mvm->mutex);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
index 32b4d66debea..5075a8061c82 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
@@ -217,6 +217,38 @@ struct iwl_rate_mcs_info {
 	char	mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 };
 
+/**
+ * struct iwl_lq_sta_rs_fw - rate and related statistics for RS in FW
+ * @last_rate_n_flags: last rate reported by FW
+ * @sta_id: the id of the station
+#ifdef CONFIG_MAC80211_DEBUGFS
+ * @dbg_fixed_rate: for debug, use fixed rate if not 0
+ * @dbg_agg_frame_count_lim: for debug, max number of frames in A-MPDU
+#endif
+ * @chains: bitmask of chains reported in %chain_signal
+ * @chain_signal: per chain signal strength
+ * @last_rssi: last rssi reported
+ * @drv: pointer back to the driver data
+ */
+
+struct iwl_lq_sta_rs_fw {
+	/* last tx rate_n_flags */
+	u32 last_rate_n_flags;
+
+	/* persistent fields - initialized only once - keep last! */
+	struct lq_sta_pers_rs_fw {
+		u32 sta_id;
+#ifdef CONFIG_MAC80211_DEBUGFS
+		u32 dbg_fixed_rate;
+		u16 dbg_agg_frame_count_lim;
+#endif
+		u8 chains;
+		s8 chain_signal[IEEE80211_MAX_CHAINS];
+		s8 last_rssi;
+		struct iwl_mvm *drv;
+	} pers;
+};
+
 /**
  * struct iwl_rate_scale_data -- tx success history for one rate
  */
@@ -406,5 +438,4 @@ struct iwl_mvm_sta;
 
 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 			  bool enable);
-
 #endif /* __rs__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rx.c b/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
index 7cbea7890b0c..63a57f0a16ef 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
@@ -383,7 +383,7 @@ void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
 								 false);
 		}
 
-		rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
+		rs_update_last_rssi(mvm, mvmsta, rx_status);
 
 		if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 		    ieee80211_is_beacon(hdr->frame_control)) {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index f444ff3a3396..00d048bd2d35 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -933,7 +933,7 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 								 false);
 		}
 
-		rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
+		rs_update_last_rssi(mvm, mvmsta, rx_status);
 
 		if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 		    ieee80211_is_beacon(hdr->frame_control)) {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 8351232472eb..12875f773a86 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -2548,6 +2548,14 @@ int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 		.aggregate = true,
 	};
 
+	/*
+	 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
+	 * manager, so this function should never be called in this case.
+	 */
+	if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
+				     IWL_UCODE_TLV_CAPA_TLC_OFFLOAD)))
+		return -EINVAL;
+
 	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
 		     != IWL_MAX_TID_COUNT);
 
@@ -2645,12 +2653,12 @@ int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 	 */
 	mvmsta->max_agg_bufsize =
 		min(mvmsta->max_agg_bufsize, buf_size);
-	mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
+	mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
 
 	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
 		     sta->addr, tid);
 
-	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
+	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
 }
 
 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
index aedabe101cf0..5ffd6adbc383 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
@@ -383,6 +383,8 @@ struct iwl_mvm_rxq_dup_data {
  * and from Tx response flow, it needs a spinlock.
  * @tid_data: per tid data + mgmt. Look at %iwl_mvm_tid_data.
  * @tid_to_baid: a simple map of TID to baid
+ * @lq_sta: holds rate scaling data, either for the case when RS is done in
+ *	the driver - %rs_drv or in the FW - %rs_fw.
  * @reserved_queue: the queue reserved for this STA for DQA purposes
  *	Every STA has is given one reserved queue to allow it to operate. If no
  *	such queue can be guaranteed, the STA addition will fail.
@@ -417,7 +419,10 @@ struct iwl_mvm_sta {
 	spinlock_t lock;
 	struct iwl_mvm_tid_data tid_data[IWL_MAX_TID_COUNT + 1];
 	u8 tid_to_baid[IWL_MAX_TID_COUNT];
-	struct iwl_lq_sta lq_sta;
+	union {
+		struct iwl_lq_sta_rs_fw rs_fw;
+		struct iwl_lq_sta rs_drv;
+	} lq_sta;
 	struct ieee80211_vif *vif;
 	struct iwl_mvm_key_pn __rcu *ptk_pn[4];
 	struct iwl_mvm_rxq_dup_data *dup_data;
-- 
2.15.0

[PATCH 06/15] iwlwifi: mvm: rs: add ops for the new rate scaling in the FW

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

This patch introduces a new instance of rate_control_ops for
the new API (adding only empty stubs here and the subsequent
patches in the series will fill in the implementation).
The decision which API to use is done during the register
step according to FW TLV.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/Makefile   |  2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c |  4 +-
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c      |  5 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c    | 67 +++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/rs.c       | 89 +++++++++++++----------
 drivers/net/wireless/intel/iwlwifi/mvm/rs.h       | 14 ++++
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c      |  7 ++
 drivers/net/wireless/intel/iwlwifi/mvm/tx.c       |  8 +-
 8 files changed, 148 insertions(+), 48 deletions(-)
 create mode 100644 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/Makefile b/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
index a47635c32c11..9ffd21918b5a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
@@ -2,7 +2,7 @@
 obj-$(CONFIG_IWLMVM)   += iwlmvm.o
 iwlmvm-y += fw.o mac80211.o nvm.o ops.o phy-ctxt.o mac-ctxt.o
 iwlmvm-y += utils.o rx.o rxmq.o tx.o binding.o quota.o sta.o sf.o
-iwlmvm-y += scan.o time-event.o rs.o
+iwlmvm-y += scan.o time-event.o rs.o rs-fw.o
 iwlmvm-y += power.o coex.o
 iwlmvm-y += tt.o offloading.o tdls.o
 iwlmvm-$(CONFIG_IWLWIFI_DEBUGFS) += debugfs.o debugfs-vif.o
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 4ff099f462fb..e7abca2441a3 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -460,7 +460,9 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 	/* this is the case for CCK frames, it's better (only 8) for OFDM */
 	hw->radiotap_timestamp.accuracy = 22;
 
-	hw->rate_control_algorithm = "iwl-mvm-rs";
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		hw->rate_control_algorithm = RS_NAME;
+
 	hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 	hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 7078b7e458be..a38a55327bcb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -127,11 +127,8 @@ static int __init iwl_mvm_init(void)
 	}
 
 	ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
-
-	if (ret) {
+	if (ret)
 		pr_err("Unable to register MVM op_mode: %d\n", ret);
-		iwl_mvm_rate_control_unregister();
-	}
 
 	return ret;
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
new file mode 100644
index 000000000000..1e4b6f1685d9
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -0,0 +1,67 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2017        Intel Deutschland GmbH
+ *
+ * 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
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <linuxwifi@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2017        Intel Deutschland GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#include "rs.h"
+#include "fw-api.h"
+#include "sta.h"
+#include "iwl-op-mode.h"
+#include "mvm.h"
+
+void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+		     enum nl80211_band band)
+{
+}
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 739c47dbc6e8..3dd6535ed922 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -42,8 +42,6 @@
 #include "mvm.h"
 #include "debugfs.h"
 
-#define RS_NAME "iwl-mvm-rs"
-
 #define IWL_RATE_MAX_WINDOW		62	/* # tx in history window */
 
 /* Calculations of success ratio are done in fixed point where 12800 is 100%.
@@ -1416,13 +1414,13 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 /*
  * mac80211 sends us Tx status
  */
-static void rs_mac80211_tx_status(void *mvm_r,
-				  struct ieee80211_supported_band *sband,
-				  struct ieee80211_sta *sta, void *priv_sta,
-				  struct sk_buff *skb)
+static void rs_drv_mac80211_tx_status(void *mvm_r,
+				      struct ieee80211_supported_band *sband,
+				      struct ieee80211_sta *sta, void *priv_sta,
+				      struct sk_buff *skb)
 {
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r;
+	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
@@ -2857,8 +2855,9 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
 	iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init);
 }
 
-static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
-			struct ieee80211_tx_rate_control *txrc)
+static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
+			    void *mvm_sta,
+			    struct ieee80211_tx_rate_control *txrc)
 {
 	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
@@ -2900,8 +2899,8 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
 	}
 }
 
-static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
-			  gfp_t gfp)
+static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
+			      gfp_t gfp)
 {
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
@@ -3037,7 +3036,7 @@ static void rs_vht_init(struct iwl_mvm *mvm,
 }
 
 #ifdef CONFIG_IWLWIFI_DEBUGFS
-static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
+void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
 {
 	spin_lock_bh(&mvm->drv_stats_lock);
 	memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
@@ -3105,8 +3104,8 @@ void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
 /*
  * Called after adding a new station to initialize rate scaling
  */
-void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
-			  enum nl80211_band band, bool init)
+static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			     enum nl80211_band band, bool init)
 {
 	int i, j;
 	struct ieee80211_hw *hw = mvm->hw;
@@ -3188,16 +3187,15 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	rs_initialize_lq(mvm, sta, lq_sta, band, init);
 }
 
-static void rs_rate_update(void *mvm_r,
-			   struct ieee80211_supported_band *sband,
-			   struct cfg80211_chan_def *chandef,
-			   struct ieee80211_sta *sta, void *priv_sta,
-			   u32 changed)
+static void rs_drv_rate_update(void *mvm_r,
+			       struct ieee80211_supported_band *sband,
+			       struct cfg80211_chan_def *chandef,
+			       struct ieee80211_sta *sta,
+			       void *priv_sta, u32 changed)
 {
+	struct iwl_op_mode *op_mode = mvm_r;
+	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
 	u8 tid;
-	struct iwl_op_mode *op_mode  =
-			(struct iwl_op_mode *)mvm_r;
-	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 
 	if (!iwl_mvm_sta_from_mac80211(sta)->vif)
 		return;
@@ -3564,14 +3562,14 @@ static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
 {
 	return hw->priv;
 }
+
 /* rate scale requires free function to be implemented */
 static void rs_free(void *mvm_rate)
 {
 	return;
 }
 
-static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta,
-			void *mvm_sta)
+static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
 {
 	struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
@@ -3982,7 +3980,8 @@ static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
 
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
 
-static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
+static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,
+				   struct dentry *dir)
 {
 	struct iwl_lq_sta *lq_sta = priv_sta;
 	struct iwl_mvm_sta *mvmsta;
@@ -4009,7 +4008,7 @@ static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
 	IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n");
 }
 
-static void rs_remove_debugfs(void *mvm, void *mvm_sta)
+void rs_remove_sta_debugfs(void *mvm, void *mvm_sta)
 {
 }
 #endif
@@ -4019,37 +4018,47 @@ static void rs_remove_debugfs(void *mvm, void *mvm_sta)
  * the station is added. Since mac80211 calls this function before a
  * station is added we ignore it.
  */
-static void rs_rate_init_stub(void *mvm_r,
-			      struct ieee80211_supported_band *sband,
-			      struct cfg80211_chan_def *chandef,
-			      struct ieee80211_sta *sta, void *mvm_sta)
+static void rs_rate_init_ops(void *mvm_r,
+			     struct ieee80211_supported_band *sband,
+			     struct cfg80211_chan_def *chandef,
+			     struct ieee80211_sta *sta, void *mvm_sta)
 {
 }
 
-static const struct rate_control_ops rs_mvm_ops = {
+/* ops for rate scaling implemented in the driver */
+static const struct rate_control_ops rs_mvm_ops_drv = {
 	.name = RS_NAME,
-	.tx_status = rs_mac80211_tx_status,
-	.get_rate = rs_get_rate,
-	.rate_init = rs_rate_init_stub,
+	.tx_status = rs_drv_mac80211_tx_status,
+	.get_rate = rs_drv_get_rate,
+	.rate_init = rs_rate_init_ops,
 	.alloc = rs_alloc,
 	.free = rs_free,
-	.alloc_sta = rs_alloc_sta,
+	.alloc_sta = rs_drv_alloc_sta,
 	.free_sta = rs_free_sta,
-	.rate_update = rs_rate_update,
+	.rate_update = rs_drv_rate_update,
 #ifdef CONFIG_MAC80211_DEBUGFS
-	.add_sta_debugfs = rs_add_debugfs,
-	.remove_sta_debugfs = rs_remove_debugfs,
+	.add_sta_debugfs = rs_drv_add_sta_debugfs,
+	.remove_sta_debugfs = rs_remove_sta_debugfs,
 #endif
 };
 
+void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			  enum nl80211_band band, bool init)
+{
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		rs_fw_rate_init(mvm, sta, band);
+	else
+		rs_drv_rate_init(mvm, sta, band, init);
+}
+
 int iwl_mvm_rate_control_register(void)
 {
-	return ieee80211_rate_control_register(&rs_mvm_ops);
+	return ieee80211_rate_control_register(&rs_mvm_ops_drv);
 }
 
 void iwl_mvm_rate_control_unregister(void)
 {
-	ieee80211_rate_control_unregister(&rs_mvm_ops);
+	ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
 }
 
 /**
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
index 5075a8061c82..eb92ded8a4dc 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
@@ -36,6 +36,8 @@
 #include "fw-api.h"
 #include "iwl-trans.h"
 
+#define RS_NAME "iwl-mvm-rs"
+
 struct iwl_rs_rate_info {
 	u8 plcp;	  /* uCode API:  IWL_RATE_6M_PLCP, etc. */
 	u8 plcp_ht_siso;  /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
@@ -438,4 +440,16 @@ struct iwl_mvm_sta;
 
 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 			  bool enable);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm);
+#endif
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+void rs_remove_sta_debugfs(void *mvm, void *mvm_sta);
+#endif
+
+void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta);
+void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+		     enum nl80211_band band);
 #endif /* __rs__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 12875f773a86..6ed9a8eae107 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -1439,6 +1439,13 @@ int iwl_mvm_add_sta(struct iwl_mvm *mvm,
 			goto err;
 	}
 
+	/*
+	 * if rs is registered with mac80211, then "add station" will be handled
+	 * via the corresponding ops, otherwise need to notify rate scaling here
+	 */
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		iwl_mvm_rs_add_sta(mvm, mvm_sta);
+
 update_fw:
 	ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
 	if (ret)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 9e7beecf043a..b65b4e8f8606 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1718,8 +1718,12 @@ static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
 		ba_info->band = chanctx_conf->def.chan->band;
 		iwl_mvm_hwrate_to_tx_status(rate, ba_info);
 
-		IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
-		iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
+		if (!fw_has_capa(&mvm->fw->ucode_capa,
+				 IWL_UCODE_TLV_CAPA_TLC_OFFLOAD)) {
+			IWL_DEBUG_TX_REPLY(mvm,
+					   "No reclaim. Update rs directly\n");
+			iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
+		}
 	}
 
 out:
-- 
2.15.0

[PATCH 07/15] iwlwifi: mvm: rs: add basic implementation of the new RS API handlers

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

This patch adds rate scaling configuration command and
implements a few other handlers.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 .../net/wireless/intel/iwlwifi/fw/api/datapath.h   |   5 +
 drivers/net/wireless/intel/iwlwifi/fw/api/rs.h     | 168 +++++++++++++++++-
 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c     | 187 +++++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/rs.c        |  25 ++-
 drivers/net/wireless/intel/iwlwifi/mvm/rs.h        |   2 +
 drivers/net/wireless/intel/iwlwifi/mvm/utils.c     |   4 +-
 6 files changed, 379 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
index aa76dcc148bd..8ec1a7fe62ea 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
@@ -82,6 +82,11 @@ enum iwl_data_path_subcmd_ids {
 	 */
 	TRIGGER_RX_QUEUES_NOTIF_CMD = 0x2,
 
+	/**
+	 * @TLC_MNG_CONFIG_CMD: &struct iwl_tlc_config_cmd
+	 */
+	TLC_MNG_CONFIG_CMD = 0xF,
+
 	/**
 	 * @STA_PM_NOTIF: &struct iwl_mvm_pm_state_notification
 	 */
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h b/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
index a13fd8a1be62..ba88b0ea9a60 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
@@ -62,6 +62,173 @@
 
 #include "mac.h"
 
+/**
+ * enum iwl_tlc_mng_cfg_flags_enum - options for TLC config flags
+ * @IWL_TLC_MNG_CFG_FLAGS_CCK_MSK: CCK support
+ * @IWL_TLC_MNG_CFG_FLAGS_DD_MSK: enable DD
+ * @IWL_TLC_MNG_CFG_FLAGS_STBC_MSK: enable STBC
+ * @IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK: enable LDPC
+ * @IWL_TLC_MNG_CFG_FLAGS_BF_MSK: enable BFER
+ * @IWL_TLC_MNG_CFG_FLAGS_DCM_MSK: enable DCM
+ */
+enum iwl_tlc_mng_cfg_flags_enum {
+	IWL_TLC_MNG_CFG_FLAGS_CCK_MSK	= BIT(0),
+	IWL_TLC_MNG_CFG_FLAGS_DD_MSK	= BIT(1),
+	IWL_TLC_MNG_CFG_FLAGS_STBC_MSK	= BIT(2),
+	IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK	= BIT(3),
+	IWL_TLC_MNG_CFG_FLAGS_BF_MSK	= BIT(4),
+	IWL_TLC_MNG_CFG_FLAGS_DCM_MSK	= BIT(5),
+};
+
+/**
+ * enum iwl_tlc_mng_cfg_cw_enum - channel width options
+ * @IWL_TLC_MNG_MAX_CH_WIDTH_20MHZ: 20MHZ channel
+ * @IWL_TLC_MNG_MAX_CH_WIDTH_40MHZ: 40MHZ channel
+ * @IWL_TLC_MNG_MAX_CH_WIDTH_80MHZ: 80MHZ channel
+ * @IWL_TLC_MNG_MAX_CH_WIDTH_160MHZ: 160MHZ channel
+ * @IWL_TLC_MNG_MAX_CH_WIDTH_LAST: maximum value
+ */
+enum iwl_tlc_mng_cfg_cw_enum {
+	IWL_TLC_MNG_MAX_CH_WIDTH_20MHZ,
+	IWL_TLC_MNG_MAX_CH_WIDTH_40MHZ,
+	IWL_TLC_MNG_MAX_CH_WIDTH_80MHZ,
+	IWL_TLC_MNG_MAX_CH_WIDTH_160MHZ,
+	IWL_TLC_MNG_MAX_CH_WIDTH_LAST = IWL_TLC_MNG_MAX_CH_WIDTH_160MHZ,
+};
+
+/**
+ * enum iwl_tlc_mng_cfg_chains_enum - possible chains
+ * @IWL_TLC_MNG_CHAIN_A_MSK: chain A
+ * @IWL_TLC_MNG_CHAIN_B_MSK: chain B
+ * @IWL_TLC_MNG_CHAIN_C_MSK: chain C
+ */
+enum iwl_tlc_mng_cfg_chains_enum {
+	IWL_TLC_MNG_CHAIN_A_MSK = BIT(0),
+	IWL_TLC_MNG_CHAIN_B_MSK = BIT(1),
+	IWL_TLC_MNG_CHAIN_C_MSK = BIT(2),
+};
+
+/**
+ * enum iwl_tlc_mng_cfg_gi_enum - guard interval options
+ * @IWL_TLC_MNG_SGI_20MHZ_MSK: enable short GI for 20MHZ
+ * @IWL_TLC_MNG_SGI_40MHZ_MSK: enable short GI for 40MHZ
+ * @IWL_TLC_MNG_SGI_80MHZ_MSK: enable short GI for 80MHZ
+ * @IWL_TLC_MNG_SGI_160MHZ_MSK: enable short GI for 160MHZ
+ */
+enum iwl_tlc_mng_cfg_gi_enum {
+	IWL_TLC_MNG_SGI_20MHZ_MSK  = BIT(0),
+	IWL_TLC_MNG_SGI_40MHZ_MSK  = BIT(1),
+	IWL_TLC_MNG_SGI_80MHZ_MSK  = BIT(2),
+	IWL_TLC_MNG_SGI_160MHZ_MSK = BIT(3),
+};
+
+/**
+ * enum iwl_tlc_mng_cfg_mode_enum - supported modes
+ * @IWL_TLC_MNG_MODE_CCK: enable CCK
+ * @IWL_TLC_MNG_MODE_OFDM_NON_HT: enable OFDM (non HT)
+ * @IWL_TLC_MNG_MODE_NON_HT: enable non HT
+ * @IWL_TLC_MNG_MODE_HT: enable HT
+ * @IWL_TLC_MNG_MODE_VHT: enable VHT
+ * @IWL_TLC_MNG_MODE_HE: enable HE
+ * @IWL_TLC_MNG_MODE_INVALID: invalid value
+ * @IWL_TLC_MNG_MODE_NUM: a count of possible modes
+ */
+enum iwl_tlc_mng_cfg_mode_enum {
+	IWL_TLC_MNG_MODE_CCK = 0,
+	IWL_TLC_MNG_MODE_OFDM_NON_HT = IWL_TLC_MNG_MODE_CCK,
+	IWL_TLC_MNG_MODE_NON_HT = IWL_TLC_MNG_MODE_CCK,
+	IWL_TLC_MNG_MODE_HT,
+	IWL_TLC_MNG_MODE_VHT,
+	IWL_TLC_MNG_MODE_HE,
+	IWL_TLC_MNG_MODE_INVALID,
+	IWL_TLC_MNG_MODE_NUM = IWL_TLC_MNG_MODE_INVALID,
+};
+
+/**
+ * enum iwl_tlc_mng_vht_he_types_enum - VHT HE types
+ * @IWL_TLC_MNG_VALID_VHT_HE_TYPES_SU: VHT HT single user
+ * @IWL_TLC_MNG_VALID_VHT_HE_TYPES_SU_EXT: VHT HT single user extended
+ * @IWL_TLC_MNG_VALID_VHT_HE_TYPES_MU: VHT HT multiple users
+ * @IWL_TLC_MNG_VALID_VHT_HE_TYPES_TRIG_BASED: trigger based
+ * @IWL_TLC_MNG_VALID_VHT_HE_TYPES_NUM: a count of possible types
+ */
+enum iwl_tlc_mng_vht_he_types_enum {
+	IWL_TLC_MNG_VALID_VHT_HE_TYPES_SU = 0,
+	IWL_TLC_MNG_VALID_VHT_HE_TYPES_SU_EXT,
+	IWL_TLC_MNG_VALID_VHT_HE_TYPES_MU,
+	IWL_TLC_MNG_VALID_VHT_HE_TYPES_TRIG_BASED,
+	IWL_TLC_MNG_VALID_VHT_HE_TYPES_NUM =
+		IWL_TLC_MNG_VALID_VHT_HE_TYPES_TRIG_BASED,
+
+};
+
+/**
+ * enum iwl_tlc_mng_ht_rates_enum - HT/VHT rates
+ * @IWL_TLC_MNG_HT_RATE_MCS0: index of MCS0
+ * @IWL_TLC_MNG_HT_RATE_MCS1: index of MCS1
+ * @IWL_TLC_MNG_HT_RATE_MCS2: index of MCS2
+ * @IWL_TLC_MNG_HT_RATE_MCS3: index of MCS3
+ * @IWL_TLC_MNG_HT_RATE_MCS4: index of MCS4
+ * @IWL_TLC_MNG_HT_RATE_MCS5: index of MCS5
+ * @IWL_TLC_MNG_HT_RATE_MCS6: index of MCS6
+ * @IWL_TLC_MNG_HT_RATE_MCS7: index of MCS7
+ * @IWL_TLC_MNG_HT_RATE_MCS8: index of MCS8
+ * @IWL_TLC_MNG_HT_RATE_MCS9: index of MCS9
+ * @IWL_TLC_MNG_HT_RATE_MAX: maximal rate for HT/VHT
+ */
+enum iwl_tlc_mng_ht_rates_enum {
+	IWL_TLC_MNG_HT_RATE_MCS0 = 0,
+	IWL_TLC_MNG_HT_RATE_MCS1,
+	IWL_TLC_MNG_HT_RATE_MCS2,
+	IWL_TLC_MNG_HT_RATE_MCS3,
+	IWL_TLC_MNG_HT_RATE_MCS4,
+	IWL_TLC_MNG_HT_RATE_MCS5,
+	IWL_TLC_MNG_HT_RATE_MCS6,
+	IWL_TLC_MNG_HT_RATE_MCS7,
+	IWL_TLC_MNG_HT_RATE_MCS8,
+	IWL_TLC_MNG_HT_RATE_MCS9,
+	IWL_TLC_MNG_HT_RATE_MAX = IWL_TLC_MNG_HT_RATE_MCS9,
+};
+
+/* Maximum supported tx antennas number */
+#define MAX_RS_ANT_NUM 3
+
+/**
+ * struct tlc_config_cmd - TLC configuration
+ * @sta_id: station id
+ * @reserved1: reserved
+ * @max_supp_ch_width: channel width
+ * @flags: bitmask of %IWL_TLC_MNG_CONFIG_FLAGS_ENABLE_\*
+ * @chains: bitmask of %IWL_TLC_MNG_CHAIN_\*
+ * @max_supp_ss: valid values are 0-3, 0 - spatial streams are not supported
+ * @valid_vht_he_types: bitmap of %IWL_TLC_MNG_VALID_VHT_HE_TYPES_\*
+ * @non_ht_supp_rates: bitmap of supported legacy rates
+ * @ht_supp_rates: bitmap of supported HT/VHT rates, valid bits are 0-9
+ * @mode: modulation type %IWL_TLC_MNG_MODE_\*
+ * @reserved2: reserved
+ * @he_supp_rates: bitmap of supported HE rates
+ * @sgi_ch_width_supp: bitmap of SGI support per channel width
+ * @he_gi_support: 11ax HE guard interval
+ * @max_ampdu_cnt: max AMPDU size (frames count)
+ */
+struct iwl_tlc_config_cmd {
+	u8 sta_id;
+	u8 reserved1[3];
+	u8 max_supp_ch_width;
+	u8 chains;
+	u8 max_supp_ss;
+	u8 valid_vht_he_types;
+	__le16 flags;
+	__le16 non_ht_supp_rates;
+	__le16 ht_supp_rates[MAX_RS_ANT_NUM];
+	u8 mode;
+	u8 reserved2;
+	__le16 he_supp_rates;
+	u8 sgi_ch_width_supp;
+	u8 he_gi_support;
+	__le32 max_ampdu_cnt;
+} __packed; /* TLC_MNG_CONFIG_CMD_API_S_VER_1 */
+
 /*
  * These serve as indexes into
  * struct iwl_rate_info fw_rate_idx_to_plcp[IWL_RATE_COUNT];
@@ -253,7 +420,6 @@ enum {
 #define RATE_MCS_ANT_ABC_MSK		(RATE_MCS_ANT_AB_MSK | \
 					 RATE_MCS_ANT_C_MSK)
 #define RATE_MCS_ANT_MSK		RATE_MCS_ANT_ABC_MSK
-#define RATE_MCS_ANT_NUM 3
 
 /* Bit 17: (0) SS, (1) SS*2 */
 #define RATE_MCS_STBC_POS		17
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
index 1e4b6f1685d9..e11788253803 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -61,7 +61,194 @@
 #include "iwl-op-mode.h"
 #include "mvm.h"
 
+static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta)
+{
+	switch (sta->bandwidth) {
+	case IEEE80211_STA_RX_BW_160:
+		return IWL_TLC_MNG_MAX_CH_WIDTH_160MHZ;
+	case IEEE80211_STA_RX_BW_80:
+		return IWL_TLC_MNG_MAX_CH_WIDTH_80MHZ;
+	case IEEE80211_STA_RX_BW_40:
+		return IWL_TLC_MNG_MAX_CH_WIDTH_40MHZ;
+	case IEEE80211_STA_RX_BW_20:
+	default:
+		return IWL_TLC_MNG_MAX_CH_WIDTH_20MHZ;
+	}
+}
+
+static u8 rs_fw_set_active_chains(u8 chains)
+{
+	u8 fw_chains = 0;
+
+	if (chains & ANT_A)
+		fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK;
+	if (chains & ANT_B)
+		fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK;
+	if (chains & ANT_C)
+		fw_chains |= IWL_TLC_MNG_CHAIN_C_MSK;
+
+	return fw_chains;
+}
+
+static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta)
+{
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
+	u8 supp = 0;
+
+	if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20)
+		supp |= IWL_TLC_MNG_SGI_20MHZ_MSK;
+	if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40)
+		supp |= IWL_TLC_MNG_SGI_40MHZ_MSK;
+	if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80)
+		supp |= IWL_TLC_MNG_SGI_80MHZ_MSK;
+	if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160)
+		supp |= IWL_TLC_MNG_SGI_160MHZ_MSK;
+
+	return supp;
+}
+
+static u16 rs_fw_set_config_flags(struct iwl_mvm *mvm,
+				  struct ieee80211_sta *sta)
+{
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
+	bool vht_ena = vht_cap && vht_cap->vht_supported;
+	u16 flags = IWL_TLC_MNG_CFG_FLAGS_CCK_MSK |
+		    IWL_TLC_MNG_CFG_FLAGS_DCM_MSK |
+		    IWL_TLC_MNG_CFG_FLAGS_DD_MSK;
+
+	if (mvm->cfg->ht_params->stbc &&
+	    (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
+	    ((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) ||
+	     (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))))
+		flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
+
+	if (mvm->cfg->ht_params->ldpc &&
+	    ((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) ||
+	     (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
+		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
+
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
+	    (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
+	    (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
+		flags |= IWL_TLC_MNG_CFG_FLAGS_BF_MSK;
+
+	return flags;
+}
+
+static
+int rs_fw_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
+				   int nss)
+{
+	u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
+		(0x3 << (2 * (nss - 1)));
+	rx_mcs >>= (2 * (nss - 1));
+
+	switch (rx_mcs) {
+	case IEEE80211_VHT_MCS_SUPPORT_0_7:
+		return IWL_TLC_MNG_HT_RATE_MCS7;
+	case IEEE80211_VHT_MCS_SUPPORT_0_8:
+		return IWL_TLC_MNG_HT_RATE_MCS8;
+	case IEEE80211_VHT_MCS_SUPPORT_0_9:
+		return IWL_TLC_MNG_HT_RATE_MCS9;
+	default:
+		WARN_ON_ONCE(1);
+		break;
+	}
+
+	return 0;
+}
+
+static void rs_fw_vht_set_enabled_rates(struct ieee80211_sta *sta,
+					struct ieee80211_sta_vht_cap *vht_cap,
+					struct iwl_tlc_config_cmd *cmd)
+{
+	u16 supp;
+	int i, highest_mcs;
+
+	for (i = 0; i < sta->rx_nss; i++) {
+		if (i == MAX_RS_ANT_NUM)
+			break;
+
+		highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1);
+		if (!highest_mcs)
+			continue;
+
+		supp = BIT(highest_mcs + 1) - 1;
+		if (sta->bandwidth == IEEE80211_STA_RX_BW_20)
+			supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);
+
+		cmd->ht_supp_rates[i] = cpu_to_le16(supp);
+	}
+}
+
+static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
+				 struct ieee80211_supported_band *sband,
+				 struct iwl_tlc_config_cmd *cmd)
+{
+	int i;
+	unsigned long tmp;
+	unsigned long supp; /* must be unsigned long for for_each_set_bit */
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
+
+	/* non HT rates */
+	supp = 0;
+	tmp = sta->supp_rates[sband->band];
+	for_each_set_bit(i, &tmp, BITS_PER_LONG)
+		supp |= BIT(sband->bitrates[i].hw_value);
+
+	cmd->non_ht_supp_rates = cpu_to_le16(supp);
+	cmd->mode = IWL_TLC_MNG_MODE_NON_HT;
+
+	/* HT/VHT rates */
+	if (vht_cap && vht_cap->vht_supported) {
+		cmd->mode = IWL_TLC_MNG_MODE_VHT;
+		rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd);
+	} else if (ht_cap && ht_cap->ht_supported) {
+		cmd->mode = IWL_TLC_MNG_MODE_HT;
+		cmd->ht_supp_rates[0] = cpu_to_le16(ht_cap->mcs.rx_mask[0]);
+		cmd->ht_supp_rates[1] = cpu_to_le16(ht_cap->mcs.rx_mask[1]);
+	}
+}
+
 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 		     enum nl80211_band band)
 {
+	struct ieee80211_hw *hw = mvm->hw;
+	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
+	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
+	u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0);
+	struct ieee80211_supported_band *sband;
+	struct iwl_tlc_config_cmd cfg_cmd = {
+		.sta_id = mvmsta->sta_id,
+		.max_supp_ch_width = rs_fw_bw_from_sta_bw(sta),
+		.flags = cpu_to_le16(rs_fw_set_config_flags(mvm, sta)),
+		.chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)),
+		.max_supp_ss = sta->rx_nss,
+		.max_ampdu_cnt = cpu_to_le32(mvmsta->max_agg_bufsize),
+		.sgi_ch_width_supp = rs_fw_sgi_cw_support(sta),
+	};
+	int ret;
+
+	memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	iwl_mvm_reset_frame_stats(mvm);
+#endif
+	sband = hw->wiphy->bands[band];
+	rs_fw_set_supp_rates(sta, sband, &cfg_cmd);
+
+	ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd);
+	if (ret)
+		IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
+}
+
+int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
+			bool enable)
+{
+	/* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */
+	IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n");
+	return 0;
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 3dd6535ed922..428d34cb6683 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -4061,15 +4061,8 @@ void iwl_mvm_rate_control_unregister(void)
 	ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
 }
 
-/**
- * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable
- * Tx protection, according to this request and previous requests,
- * and send the LQ command.
- * @mvmsta: The station
- * @enable: Enable Tx protection?
- */
-int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
-			  bool enable)
+static int rs_drv_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
+				bool enable)
 {
 	struct iwl_lq_cmd *lq = &mvmsta->lq_sta.rs_drv.lq;
 
@@ -4087,3 +4080,17 @@ int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 
 	return iwl_mvm_send_lq_cmd(mvm, lq, false);
 }
+
+/**
+ * iwl_mvm_tx_protection - ask FW to enable RTS/CTS protection
+ * @mvmsta: The station
+ * @enable: Enable Tx protection?
+ */
+int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
+			  bool enable)
+{
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		return rs_fw_tx_protection(mvm, mvmsta, enable);
+	else
+		return rs_drv_tx_protection(mvm, mvmsta, enable);
+}
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
index eb92ded8a4dc..5b58e2d9bfbc 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
@@ -452,4 +452,6 @@ void rs_remove_sta_debugfs(void *mvm, void *mvm_sta);
 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta);
 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 		     enum nl80211_band band);
+int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
+			bool enable);
 #endif /* __rs__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index 79acb13f203a..280edf89e5eb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -278,8 +278,8 @@ u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
 	u8 ind = last_idx;
 	int i;
 
-	for (i = 0; i < RATE_MCS_ANT_NUM; i++) {
-		ind = (ind + 1) % RATE_MCS_ANT_NUM;
+	for (i = 0; i < MAX_RS_ANT_NUM; i++) {
+		ind = (ind + 1) % MAX_RS_ANT_NUM;
 		if (valid & BIT(ind))
 			return ind;
 	}
-- 
2.15.0

[PATCH 08/15] iwlwifi: mvm: rs: new rate scale API - add FW notifications

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

This patch sends to the FW notification configuration command and
handles the update responses.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 .../net/wireless/intel/iwlwifi/fw/api/datapath.h   | 10 ++++++
 drivers/net/wireless/intel/iwlwifi/fw/api/rs.h     | 34 ++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c       |  2 ++
 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c     | 42 ++++++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/rs.h        |  1 +
 5 files changed, 89 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
index 8ec1a7fe62ea..a57c7223df0f 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
@@ -87,6 +87,16 @@ enum iwl_data_path_subcmd_ids {
 	 */
 	TLC_MNG_CONFIG_CMD = 0xF,
 
+	/**
+	 * @TLC_MNG_NOTIF_REQ_CMD: &struct iwl_tlc_notif_req_config_cmd
+	 */
+	TLC_MNG_NOTIF_REQ_CMD = 0x10,
+
+	/**
+	 * @TLC_MNG_UPDATE_NOTIF: &struct iwl_tlc_update_notif
+	 */
+	TLC_MNG_UPDATE_NOTIF = 0xF7,
+
 	/**
 	 * @STA_PM_NOTIF: &struct iwl_mvm_pm_state_notification
 	 */
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h b/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
index ba88b0ea9a60..71707e1c78a1 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
@@ -229,6 +229,40 @@ struct iwl_tlc_config_cmd {
 	__le32 max_ampdu_cnt;
 } __packed; /* TLC_MNG_CONFIG_CMD_API_S_VER_1 */
 
+#define IWL_TLC_NOTIF_INIT_RATE_POS 0
+#define IWL_TLC_NOTIF_INIT_RATE_MSK BIT(IWL_TLC_NOTIF_INIT_RATE_POS)
+#define IWL_TLC_NOTIF_REQ_INTERVAL (500)
+
+/**
+ * struct iwl_tlc_notif_req_config_cmd - request notif on specific changes
+ * @sta_id: relevant station
+ * @reserved1: reserved
+ * @flags: bitmap of requested notifications %IWL_TLC_NOTIF_INIT_\*
+ * @interval: minimum time between notifications from TLC to the driver (msec)
+ * @reserved2: reserved
+ */
+struct iwl_tlc_notif_req_config_cmd {
+	u8 sta_id;
+	u8 reserved1;
+	__le16 flags;
+	__le16 interval;
+	__le16 reserved2;
+} __packed; /* TLC_MNG_NOTIF_REQ_CMD_API_S_VER_1 */
+
+/**
+ * struct iwl_tlc_update_notif - TLC notification from FW
+ * @sta_id: station id
+ * @reserved: reserved
+ * @flags: bitmap of notifications reported
+ * @values: field per flag in struct iwl_tlc_notif_req_config_cmd
+ */
+struct iwl_tlc_update_notif {
+	u8 sta_id;
+	u8 reserved;
+	__le16 flags;
+	__le32 values[16];
+} __packed; /* TLC_MNG_UPDATE_NTFY_API_S_VER_1 */
+
 /*
  * These serve as indexes into
  * struct iwl_rate_info fw_rate_idx_to_plcp[IWL_RATE_COUNT];
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index a38a55327bcb..477395059877 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -1017,6 +1017,8 @@ static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
 		iwl_mvm_rx_queue_notif(mvm, rxb, 0);
 	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, TLC_MNG_UPDATE_NOTIF))
+		iwl_mvm_tlc_update_notif(mvm, pkt);
 	else
 		iwl_mvm_rx_common(mvm, rxb, pkt);
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
index e11788253803..0d879003d322 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -213,6 +213,46 @@ static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
 	}
 }
 
+static void rs_fw_tlc_mng_notif_req_config(struct iwl_mvm *mvm, u8 sta_id)
+{
+	u32 cmd_id = iwl_cmd_id(TLC_MNG_NOTIF_REQ_CMD, DATA_PATH_GROUP, 0);
+	struct iwl_tlc_notif_req_config_cmd cfg_cmd = {
+		.sta_id = sta_id,
+		.flags = cpu_to_le16(IWL_TLC_NOTIF_INIT_RATE_MSK),
+		.interval = cpu_to_le16(IWL_TLC_NOTIF_REQ_INTERVAL),
+	};
+	int ret;
+
+	ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd);
+	if (ret)
+		IWL_ERR(mvm, "Failed to send TLC notif request (%d)\n", ret);
+}
+
+void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
+{
+	struct iwl_tlc_update_notif *notif;
+	struct iwl_mvm_sta *mvmsta;
+	struct iwl_lq_sta_rs_fw *lq_sta;
+
+	notif = (void *)pkt->data;
+	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, notif->sta_id);
+
+	if (!mvmsta) {
+		IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
+			notif->sta_id);
+		return;
+	}
+
+	lq_sta = &mvmsta->lq_sta.rs_fw;
+
+	if (le16_to_cpu(notif->flags) & IWL_TLC_NOTIF_INIT_RATE_MSK) {
+		lq_sta->last_rate_n_flags =
+			le32_to_cpu(notif->values[IWL_TLC_NOTIF_INIT_RATE_POS]);
+		IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n",
+			       lq_sta->last_rate_n_flags);
+	}
+}
+
 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 		     enum nl80211_band band)
 {
@@ -243,6 +283,8 @@ void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd);
 	if (ret)
 		IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
+
+	rs_fw_tlc_mng_notif_req_config(mvm, cfg_cmd.sta_id);
 }
 
 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
index 5b58e2d9bfbc..fb18cb8c233d 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
@@ -454,4 +454,5 @@ void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 		     enum nl80211_band band);
 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 			bool enable);
+void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt);
 #endif /* __rs__ */
-- 
2.15.0

[PATCH 09/15] iwlwifi: mvm: rs: new rate scale API - add debugfs hooks

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

This patch adds basic debugfs hooks for rate scaling.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/fw/api/rs.h    | 60 +++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c  | 72 +++++++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c |  3 +
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h      |  6 ++
 4 files changed, 141 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h b/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
index 71707e1c78a1..e9a6e5627f94 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/rs.h
@@ -263,6 +263,66 @@ struct iwl_tlc_update_notif {
 	__le32 values[16];
 } __packed; /* TLC_MNG_UPDATE_NTFY_API_S_VER_1 */
 
+/**
+ * enum iwl_tlc_debug_flags - debug options
+ * @IWL_TLC_DEBUG_FIXED_RATE: set fixed rate for rate scaling
+ * @IWL_TLC_DEBUG_STATS_TH: threshold for sending statistics to the driver, in
+ *	frames
+ * @IWL_TLC_DEBUG_STATS_TIME_TH: threshold for sending statistics to the
+ *	driver, in msec
+ * @IWL_TLC_DEBUG_AGG_TIME_LIM: time limit for a BA session
+ * @IWL_TLC_DEBUG_AGG_DIS_START_TH: frame with try-count greater than this
+ *	threshold should not start an aggregation session
+ * @IWL_TLC_DEBUG_AGG_FRAME_CNT_LIM: set max number of frames in an aggregation
+ * @IWL_TLC_DEBUG_RENEW_ADDBA_DELAY: delay between retries of ADD BA
+ * @IWL_TLC_DEBUG_START_AC_RATE_IDX: frames per second to start a BA session
+ * @IWL_TLC_DEBUG_NO_FAR_RANGE_TWEAK: disable BW scaling
+ */
+enum iwl_tlc_debug_flags {
+	IWL_TLC_DEBUG_FIXED_RATE,
+	IWL_TLC_DEBUG_STATS_TH,
+	IWL_TLC_DEBUG_STATS_TIME_TH,
+	IWL_TLC_DEBUG_AGG_TIME_LIM,
+	IWL_TLC_DEBUG_AGG_DIS_START_TH,
+	IWL_TLC_DEBUG_AGG_FRAME_CNT_LIM,
+	IWL_TLC_DEBUG_RENEW_ADDBA_DELAY,
+	IWL_TLC_DEBUG_START_AC_RATE_IDX,
+	IWL_TLC_DEBUG_NO_FAR_RANGE_TWEAK,
+}; /* TLC_MNG_DEBUG_FLAGS_API_E_VER_1 */
+
+/**
+ * struct iwl_dhc_tlc_dbg - fixed debug config
+ * @sta_id: bit 0 - enable/disable, bits 1 - 7 hold station id
+ * @reserved1: reserved
+ * @flags: bitmap of %IWL_TLC_DEBUG_\*
+ * @fixed_rate: rate value
+ * @stats_threshold: if number of tx-ed frames is greater, send statistics
+ * @time_threshold: statistics threshold in usec
+ * @agg_time_lim: max agg time
+ * @agg_dis_start_threshold: frames with try-cont greater than this count will
+ *			     not be aggregated
+ * @agg_frame_count_lim: agg size
+ * @addba_retry_delay: delay between retries of ADD BA
+ * @start_ac_rate_idx: frames per second to start a BA session
+ * @no_far_range_tweak: disable BW scaling
+ * @reserved2: reserved
+ */
+struct iwl_dhc_tlc_cmd {
+	u8 sta_id;
+	u8 reserved1[3];
+	__le32 flags;
+	__le32 fixed_rate;
+	__le16 stats_threshold;
+	__le16 time_threshold;
+	__le16 agg_time_lim;
+	__le16 agg_dis_start_threshold;
+	__le16 agg_frame_count_lim;
+	__le16 addba_retry_delay;
+	u8 start_ac_rate_idx[IEEE80211_NUM_ACS];
+	u8 no_far_range_tweak;
+	u8 reserved2[3];
+} __packed;
+
 /*
  * These serve as indexes into
  * struct iwl_rate_info fw_rate_idx_to_plcp[IWL_RATE_COUNT];
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index dad18a609d9a..366fa75f9091 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -425,6 +425,49 @@ static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
 
+static ssize_t iwl_dbgfs_rs_data_read(struct file *file, char __user *user_buf,
+				      size_t count, loff_t *ppos)
+{
+	struct ieee80211_sta *sta = file->private_data;
+	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
+	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
+	struct iwl_mvm *mvm = lq_sta->pers.drv;
+	static const size_t bufsz = 2048;
+	char *buff;
+	int desc = 0;
+	ssize_t ret;
+
+	buff = kmalloc(bufsz, GFP_KERNEL);
+	if (!buff)
+		return -ENOMEM;
+
+	mutex_lock(&mvm->mutex);
+
+	desc += scnprintf(buff + desc, bufsz - desc, "sta_id %d\n",
+			  lq_sta->pers.sta_id);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "fixed rate 0x%X\n",
+			  lq_sta->pers.dbg_fixed_rate);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "A-MPDU size limit %d\n",
+			  lq_sta->pers.dbg_agg_frame_count_lim);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "valid_tx_ant %s%s%s\n",
+		(iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
+		(iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
+		(iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "last tx rate=0x%X ",
+			  lq_sta->last_rate_n_flags);
+
+	desc += rs_pretty_print_rate(buff + desc, lq_sta->last_rate_n_flags);
+	mutex_unlock(&mvm->mutex);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
+	kfree(buff);
+	return ret;
+}
+
 static ssize_t iwl_dbgfs_disable_power_off_read(struct file *file,
 						char __user *user_buf,
 						size_t count, loff_t *ppos)
@@ -1597,6 +1640,19 @@ static ssize_t iwl_dbgfs_d0i3_refs_write(struct iwl_mvm *mvm, char *buf,
 #define MVM_DEBUGFS_ADD_FILE(name, parent, mode) \
 	MVM_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)
 
+#define MVM_DEBUGFS_WRITE_STA_FILE_OPS(name, bufsz) \
+	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_sta)
+#define MVM_DEBUGFS_READ_WRITE_STA_FILE_OPS(name, bufsz) \
+	_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_sta)
+
+#define MVM_DEBUGFS_ADD_STA_FILE_ALIAS(alias, name, parent, mode) do {	\
+		if (!debugfs_create_file(alias, mode, parent, sta,	\
+					 &iwl_dbgfs_##name##_ops))	\
+			goto err;					\
+	} while (0)
+#define MVM_DEBUGFS_ADD_STA_FILE(name, parent, mode) \
+	MVM_DEBUGFS_ADD_STA_FILE_ALIAS(#name, name, parent, mode)
+
 static ssize_t
 iwl_dbgfs_prph_reg_read(struct file *file,
 			char __user *user_buf,
@@ -1681,6 +1737,7 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(sram, 64);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(set_nic_temperature, 64);
 MVM_DEBUGFS_READ_FILE_OPS(nic_temp);
 MVM_DEBUGFS_READ_FILE_OPS(stations);
+MVM_DEBUGFS_READ_FILE_OPS(rs_data);
 MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
 MVM_DEBUGFS_READ_FILE_OPS(bt_cmd);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(disable_power_off, 64);
@@ -1845,6 +1902,21 @@ static const struct file_operations iwl_dbgfs_mem_ops = {
 	.llseek = default_llseek,
 };
 
+void iwl_mvm_sta_add_debugfs(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif,
+			     struct ieee80211_sta *sta,
+			     struct dentry *dir)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		MVM_DEBUGFS_ADD_STA_FILE(rs_data, dir, S_IRUSR);
+
+	return;
+err:
+	IWL_ERR(mvm, "Can't create the mvm station debugfs entry\n");
+}
+
 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
 {
 	struct dentry *bcast_dir __maybe_unused;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index e7abca2441a3..4f5686526d4b 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4402,4 +4402,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 #endif
 	.get_survey = iwl_mvm_mac_get_survey,
 	.sta_statistics = iwl_mvm_mac_sta_statistics,
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	.sta_add_debugfs = iwl_mvm_sta_add_debugfs,
+#endif
 };
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index a565bae770b8..3690cfd738fb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1873,5 +1873,11 @@ void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
 
 int iwl_mvm_sar_select_profile(struct iwl_mvm *mvm, int prof_a, int prof_b);
 int iwl_mvm_get_sar_geo_profile(struct iwl_mvm *mvm);
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+void iwl_mvm_sta_add_debugfs(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif,
+			     struct ieee80211_sta *sta,
+			     struct dentry *dir);
+#endif
 
 #endif /* __IWL_MVM_H__ */
-- 
2.15.0

[PATCH 10/15] iwlwifi: mvm: rs: add size checks when printing to a buffer

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

Replace sprintf by scnprintf throughout rs code.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c |  6 +-
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h     |  2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rs.c      | 73 +++++++++++++-----------
 3 files changed, 45 insertions(+), 36 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 366fa75f9091..834c798f728c 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -460,7 +460,8 @@ static ssize_t iwl_dbgfs_rs_data_read(struct file *file, char __user *user_buf,
 			  "last tx rate=0x%X ",
 			  lq_sta->last_rate_n_flags);
 
-	desc += rs_pretty_print_rate(buff + desc, lq_sta->last_rate_n_flags);
+	desc += rs_pretty_print_rate(buff + desc, bufsz - desc,
+				     lq_sta->last_rate_n_flags);
 	mutex_unlock(&mvm->mutex);
 
 	ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
@@ -973,7 +974,8 @@ static ssize_t iwl_dbgfs_frame_stats_read(struct iwl_mvm *mvm,
 			continue;
 		pos += scnprintf(pos, endpos - pos, "Rate[%d]: ",
 				 (int)(ARRAY_SIZE(stats->last_rates) - i));
-		pos += rs_pretty_print_rate(pos, stats->last_rates[idx]);
+		pos += rs_pretty_print_rate(pos, endpos - pos,
+					    stats->last_rates[idx]);
 	}
 	spin_unlock_bh(&mvm->drv_stats_lock);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 3690cfd738fb..fea56d211e97 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1591,7 +1591,7 @@ iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 /* rate scaling */
 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init);
 void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg);
-int rs_pretty_print_rate(char *buf, const u32 rate);
+int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate);
 void rs_update_last_rssi(struct iwl_mvm *mvm,
 			 struct iwl_mvm_sta *mvmsta,
 			 struct ieee80211_rx_status *rx_status);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 428d34cb6683..56b3cf1834e5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -3579,7 +3579,7 @@ static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
 }
 
 #ifdef CONFIG_MAC80211_DEBUGFS
-int rs_pretty_print_rate(char *buf, const u32 rate)
+int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate)
 {
 
 	char *type, *bw;
@@ -3590,10 +3590,10 @@ int rs_pretty_print_rate(char *buf, const u32 rate)
 	    !(rate & RATE_MCS_VHT_MSK)) {
 		int index = iwl_hwrate_to_plcp_idx(rate);
 
-		return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n",
-			       rs_pretty_ant(ant),
-			       index == IWL_RATE_INVALID ? "BAD" :
-			       iwl_rate_mcs[index].mbps);
+		return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps\n",
+				 rs_pretty_ant(ant),
+				 index == IWL_RATE_INVALID ? "BAD" :
+				 iwl_rate_mcs[index].mbps);
 	}
 
 	if (rate & RATE_MCS_VHT_MSK) {
@@ -3627,12 +3627,13 @@ int rs_pretty_print_rate(char *buf, const u32 rate)
 		bw = "BAD BW";
 	}
 
-	return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
-		       type, rs_pretty_ant(ant), bw, mcs, nss,
-		       (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
-		       (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
-		       (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
-		       (rate & RATE_MCS_BF_MSK) ? "BF " : "");
+	return scnprintf(buf, bufsz,
+			 "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
+			 type, rs_pretty_ant(ant), bw, mcs, nss,
+			 (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
+			 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
+			 (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
+			 (rate & RATE_MCS_BF_MSK) ? "BF " : "");
 }
 
 /**
@@ -3689,6 +3690,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
 	int desc = 0;
 	int i = 0;
 	ssize_t ret;
+	static const size_t bufsz = 2048;
 
 	struct iwl_lq_sta *lq_sta = file->private_data;
 	struct iwl_mvm_sta *mvmsta =
@@ -3699,55 +3701,59 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
 	u32 ss_params;
 
 	mvm = lq_sta->pers.drv;
-	buff = kmalloc(2048, GFP_KERNEL);
+	buff = kmalloc(bufsz, GFP_KERNEL);
 	if (!buff)
 		return -ENOMEM;
 
-	desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id);
-	desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n",
-			lq_sta->total_failed, lq_sta->total_success,
-			lq_sta->active_legacy_rate);
-	desc += sprintf(buff+desc, "fixed rate 0x%X\n",
-			lq_sta->pers.dbg_fixed_rate);
-	desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "sta_id %d\n", lq_sta->lq.sta_id);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "failed=%d success=%d rate=0%lX\n",
+			  lq_sta->total_failed, lq_sta->total_success,
+			  lq_sta->active_legacy_rate);
+	desc += scnprintf(buff + desc, bufsz - desc, "fixed rate 0x%X\n",
+			  lq_sta->pers.dbg_fixed_rate);
+	desc += scnprintf(buff + desc, bufsz - desc, "valid_tx_ant %s%s%s\n",
 	    (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
 	    (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
 	    (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
-	desc += sprintf(buff+desc, "lq type %s\n",
-			(is_legacy(rate)) ? "legacy" :
-			is_vht(rate) ? "VHT" : "HT");
+	desc += scnprintf(buff + desc, bufsz - desc, "lq type %s\n",
+			  (is_legacy(rate)) ? "legacy" :
+			  is_vht(rate) ? "VHT" : "HT");
 	if (!is_legacy(rate)) {
-		desc += sprintf(buff + desc, " %s",
+		desc += scnprintf(buff + desc, bufsz - desc, " %s",
 		   (is_siso(rate)) ? "SISO" : "MIMO2");
-		desc += sprintf(buff + desc, " %s",
+		desc += scnprintf(buff + desc, bufsz - desc, " %s",
 				(is_ht20(rate)) ? "20MHz" :
 				(is_ht40(rate)) ? "40MHz" :
 				(is_ht80(rate)) ? "80MHz" :
 				(is_ht160(rate)) ? "160MHz" : "BAD BW");
-		desc += sprintf(buff + desc, " %s %s %s %s\n",
+		desc += scnprintf(buff + desc, bufsz - desc, " %s %s %s %s\n",
 				(rate->sgi) ? "SGI" : "NGI",
 				(rate->ldpc) ? "LDPC" : "BCC",
 				(lq_sta->is_agg) ? "AGG on" : "",
 				(mvmsta->tlc_amsdu) ? "AMSDU on" : "");
 	}
-	desc += sprintf(buff+desc, "last tx rate=0x%X\n",
+	desc += scnprintf(buff + desc, bufsz - desc, "last tx rate=0x%X\n",
 			lq_sta->last_rate_n_flags);
-	desc += sprintf(buff+desc,
+	desc += scnprintf(buff + desc, bufsz - desc,
 			"general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
 			lq_sta->lq.flags,
 			lq_sta->lq.mimo_delim,
 			lq_sta->lq.single_stream_ant_msk,
 			lq_sta->lq.dual_stream_ant_msk);
 
-	desc += sprintf(buff+desc,
+	desc += scnprintf(buff + desc, bufsz - desc,
 			"agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
 			le16_to_cpu(lq_sta->lq.agg_time_limit),
 			lq_sta->lq.agg_disable_start_th,
 			lq_sta->lq.agg_frame_cnt_limit);
 
-	desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc);
+	desc += scnprintf(buff + desc, bufsz - desc, "reduced tpc=%d\n",
+			  lq_sta->lq.reduced_tpc);
 	ss_params = le32_to_cpu(lq_sta->lq.ss_params);
-	desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n",
+	desc += scnprintf(buff + desc, bufsz - desc,
+			"single stream params: %s%s%s%s\n",
 			(ss_params & LQ_SS_PARAMS_VALID) ?
 			"VALID" : "INVALID",
 			(ss_params & LQ_SS_BFER_ALLOWED) ?
@@ -3756,7 +3762,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
 			", STBC" : "",
 			(ss_params & LQ_SS_FORCE) ?
 			", FORCE" : "");
-	desc += sprintf(buff+desc,
+	desc += scnprintf(buff + desc, bufsz - desc,
 			"Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
 			lq_sta->lq.initial_rate_index[0],
 			lq_sta->lq.initial_rate_index[1],
@@ -3766,8 +3772,9 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
 	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 		u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);
 
-		desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r);
-		desc += rs_pretty_print_rate(buff+desc, r);
+		desc += scnprintf(buff + desc, bufsz - desc,
+				  " rate[%d] 0x%X ", i, r);
+		desc += rs_pretty_print_rate(buff + desc, bufsz - desc, r);
 	}
 
 	ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
-- 
2.15.0

[PATCH 11/15] iwlwifi: mvm: rs: add sanity check when sending LQ command

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

When sending LQ command, verify the rate scaling is not in firmware.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index 280edf89e5eb..b7fc1b9fb605 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -912,7 +912,9 @@ int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init)
 		.data = { lq, },
 	};
 
-	if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA))
+	if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
+		    fw_has_capa(&mvm->fw->ucode_capa,
+				IWL_UCODE_TLV_CAPA_TLC_OFFLOAD)))
 		return -EINVAL;
 
 	return iwl_mvm_send_cmd(mvm, &cmd);
-- 
2.15.0

[PATCH 12/15] iwlwifi: mvm: enable RX offloading with TKIP and WEP

[Luca Coelho]

From: David Spinadel <david.spinadel@intel.com>

Set the flag that indicates that ICV was stripped on if
this option was enabled in the HW.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/iwl-trans.h |  4 +++-
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c  | 12 +++++++++---
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index 196b90b0451f..84ae1e274d38 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -117,6 +117,7 @@
 #define FH_RSCSR_FRAME_INVALID		0x55550000
 #define FH_RSCSR_FRAME_ALIGN		0x40
 #define FH_RSCSR_RPA_EN			BIT(25)
+#define FH_RSCSR_RADA_EN		BIT(26)
 #define FH_RSCSR_RXQ_POS		16
 #define FH_RSCSR_RXQ_MASK		0x3F0000
 
@@ -128,7 +129,8 @@ struct iwl_rx_packet {
 	 * 31:    flag flush RB request
 	 * 30:    flag ignore TC (terminal counter) request
 	 * 29:    flag fast IRQ request
-	 * 28-26: Reserved
+	 * 28-27: Reserved
+	 * 26:    RADA enabled
 	 * 25:    Offload enabled
 	 * 24:    RPF enabled
 	 * 23:    RSS enabled
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 00d048bd2d35..0e6a7dd30aa9 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -232,8 +232,8 @@ static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 
 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
 			     struct ieee80211_rx_status *stats,
-			     struct iwl_rx_mpdu_desc *desc, int queue,
-			     u8 *crypt_len)
+			     struct iwl_rx_mpdu_desc *desc, u32 pkt_flags,
+			     int queue, u8 *crypt_len)
 {
 	u16 status = le16_to_cpu(desc->status);
 
@@ -270,6 +270,10 @@ static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
 		if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 				IWL_RX_MPDU_STATUS_SEC_WEP)
 			*crypt_len = IEEE80211_WEP_IV_LEN;
+
+		if (pkt_flags & FH_RSCSR_RADA_EN)
+			stats->flag |= RX_FLAG_ICV_STRIPPED;
+
 		return 0;
 	case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
 		if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
@@ -848,7 +852,9 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 
 	rx_status = IEEE80211_SKB_RXCB(skb);
 
-	if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) {
+	if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc,
+			      le32_to_cpu(pkt->len_n_flags), queue,
+			      &crypt_len)) {
 		kfree_skb(skb);
 		return;
 	}
-- 
2.15.0

[PATCH 13/15] iwlwifi: mvm: mark MIC stripped MPDUs

[Luca Coelho]

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

When RADA is active, the hardware decrypts the packets and strips off
the MIC as it is useless after decryption. Indicate that to mac80211.

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

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 0e6a7dd30aa9..a81ff4163d05 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -253,6 +253,8 @@ static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
 			return -1;
 
 		stats->flag |= RX_FLAG_DECRYPTED;
+		if (pkt_flags & FH_RSCSR_RADA_EN)
+			stats->flag |= RX_FLAG_MIC_STRIPPED;
 		*crypt_len = IEEE80211_CCMP_HDR_LEN;
 		return 0;
 	case IWL_RX_MPDU_STATUS_SEC_TKIP:
-- 
2.15.0

[PATCH 14/15] iwlwifi: mvm: make init_dbg effective only on failure

[Luca Coelho]

From: Liad Kaufman <liad.kaufman@intel.com>

If FW loads without a problem, leaving init_dbg on can
cause a confusion, since the user won't necessarily
remember it is still turned on, and there are flows in
which everything continues as usual, only without
stopping the device after INIT, even if there is no FW
assert. On 22000 HW, for instance, this causes a
warning, since the paging is getting initialized twice.

Solve the issue by making this module param effective
only if the FW indeed asserts during INIT.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c  | 8 ++++----
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index 3019ed9bccd2..0920be637b57 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -923,11 +923,11 @@ static int iwl_mvm_load_rt_fw(struct iwl_mvm *mvm)
 
 	ret = iwl_run_init_mvm_ucode(mvm, false);
 
-	if (iwlmvm_mod_params.init_dbg)
-		return 0;
-
 	if (ret) {
 		IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", ret);
+
+		if (iwlmvm_mod_params.init_dbg)
+			return 0;
 		return ret;
 	}
 
@@ -1111,7 +1111,7 @@ int iwl_mvm_up(struct iwl_mvm *mvm)
 	IWL_DEBUG_INFO(mvm, "RT uCode started.\n");
 	return 0;
  error:
-	if (!iwlmvm_mod_params.init_dbg)
+	if (!iwlmvm_mod_params.init_dbg || !ret)
 		iwl_mvm_stop_device(mvm);
 	return ret;
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 477395059877..f32edc1709d1 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -746,7 +746,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 	mutex_lock(&mvm->mutex);
 	iwl_mvm_ref(mvm, IWL_MVM_REF_INIT_UCODE);
 	err = iwl_run_init_mvm_ucode(mvm, true);
-	if (!iwlmvm_mod_params.init_dbg)
+	if (!iwlmvm_mod_params.init_dbg || !err)
 		iwl_mvm_stop_device(mvm);
 	iwl_mvm_unref(mvm, IWL_MVM_REF_INIT_UCODE);
 	mutex_unlock(&mvm->mutex);
-- 
2.15.0

[PATCH 15/15] iwlwifi: mvm: request statistics when reading debugfs

[Luca Coelho]

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

When statistics are read from debugfs, make sure that they
are actually updated from the firmware.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 834c798f728c..270781e13e89 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -759,6 +759,9 @@ static ssize_t iwl_dbgfs_fw_rx_stats_read(struct file *file,
 
 	mutex_lock(&mvm->mutex);
 
+	if (iwl_mvm_firmware_running(mvm))
+		iwl_mvm_request_statistics(mvm, false);
+
 	pos += scnprintf(buf + pos, bufsz - pos, fmt_header,
 			 "Statistics_Rx - OFDM");
 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
-- 
2.15.0

[PATCH v2 06/15] iwlwifi: mvm: rs: add ops for the new rate scaling in the FW

[Luca Coelho]

From: Gregory Greenman <gregory.greenman@intel.com>

This patch introduces a new instance of rate_control_ops for
the new API (adding only empty stubs here and the subsequent
patches in the series will fill in the implementation).
The decision which API to use is done during the register
step according to FW TLV.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/Makefile   |  2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c |  4 +-
 drivers/net/wireless/intel/iwlwifi/mvm/ops.c      |  5 +-
 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c    | 85 ++++++++++++++++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/rs.c       | 89 +++++++++++++----------
 drivers/net/wireless/intel/iwlwifi/mvm/rs.h       | 14 ++++
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c      |  7 ++
 drivers/net/wireless/intel/iwlwifi/mvm/tx.c       |  8 +-
 8 files changed, 166 insertions(+), 48 deletions(-)
 create mode 100644 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/Makefile b/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
index a47635c32c11..9ffd21918b5a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
@@ -2,7 +2,7 @@
 obj-$(CONFIG_IWLMVM)   += iwlmvm.o
 iwlmvm-y += fw.o mac80211.o nvm.o ops.o phy-ctxt.o mac-ctxt.o
 iwlmvm-y += utils.o rx.o rxmq.o tx.o binding.o quota.o sta.o sf.o
-iwlmvm-y += scan.o time-event.o rs.o
+iwlmvm-y += scan.o time-event.o rs.o rs-fw.o
 iwlmvm-y += power.o coex.o
 iwlmvm-y += tt.o offloading.o tdls.o
 iwlmvm-$(CONFIG_IWLWIFI_DEBUGFS) += debugfs.o debugfs-vif.o
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 4ff099f462fb..e7abca2441a3 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -460,7 +460,9 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 	/* this is the case for CCK frames, it's better (only 8) for OFDM */
 	hw->radiotap_timestamp.accuracy = 22;
 
-	hw->rate_control_algorithm = "iwl-mvm-rs";
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		hw->rate_control_algorithm = RS_NAME;
+
 	hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 	hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 7078b7e458be..a38a55327bcb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -127,11 +127,8 @@ static int __init iwl_mvm_init(void)
 	}
 
 	ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
-
-	if (ret) {
+	if (ret)
 		pr_err("Unable to register MVM op_mode: %d\n", ret);
-		iwl_mvm_rate_control_unregister();
-	}
 
 	return ret;
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
new file mode 100644
index 000000000000..aae55b26a397
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -0,0 +1,85 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2017        Intel Deutschland GmbH
+ *
+ * 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
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <linuxwifi@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2017        Intel Deutschland GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#include "rs.h"
+#include "fw-api.h"
+#include "sta.h"
+#include "iwl-op-mode.h"
+#include "mvm.h"
+
+void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+		     enum nl80211_band band)
+{
+}
+
+void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
+{
+	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
+
+	IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
+
+	lq_sta->pers.drv = mvm;
+	lq_sta->pers.sta_id = mvmsta->sta_id;
+	lq_sta->pers.chains = 0;
+	memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
+	lq_sta->pers.last_rssi = S8_MIN;
+	lq_sta->last_rate_n_flags = 0;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	lq_sta->pers.dbg_fixed_rate = 0;
+#endif
+}
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 739c47dbc6e8..3dd6535ed922 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -42,8 +42,6 @@
 #include "mvm.h"
 #include "debugfs.h"
 
-#define RS_NAME "iwl-mvm-rs"
-
 #define IWL_RATE_MAX_WINDOW		62	/* # tx in history window */
 
 /* Calculations of success ratio are done in fixed point where 12800 is 100%.
@@ -1416,13 +1414,13 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 /*
  * mac80211 sends us Tx status
  */
-static void rs_mac80211_tx_status(void *mvm_r,
-				  struct ieee80211_supported_band *sband,
-				  struct ieee80211_sta *sta, void *priv_sta,
-				  struct sk_buff *skb)
+static void rs_drv_mac80211_tx_status(void *mvm_r,
+				      struct ieee80211_supported_band *sband,
+				      struct ieee80211_sta *sta, void *priv_sta,
+				      struct sk_buff *skb)
 {
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r;
+	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
@@ -2857,8 +2855,9 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
 	iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init);
 }
 
-static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
-			struct ieee80211_tx_rate_control *txrc)
+static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
+			    void *mvm_sta,
+			    struct ieee80211_tx_rate_control *txrc)
 {
 	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
@@ -2900,8 +2899,8 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
 	}
 }
 
-static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
-			  gfp_t gfp)
+static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
+			      gfp_t gfp)
 {
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
@@ -3037,7 +3036,7 @@ static void rs_vht_init(struct iwl_mvm *mvm,
 }
 
 #ifdef CONFIG_IWLWIFI_DEBUGFS
-static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
+void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
 {
 	spin_lock_bh(&mvm->drv_stats_lock);
 	memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
@@ -3105,8 +3104,8 @@ void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
 /*
  * Called after adding a new station to initialize rate scaling
  */
-void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
-			  enum nl80211_band band, bool init)
+static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			     enum nl80211_band band, bool init)
 {
 	int i, j;
 	struct ieee80211_hw *hw = mvm->hw;
@@ -3188,16 +3187,15 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	rs_initialize_lq(mvm, sta, lq_sta, band, init);
 }
 
-static void rs_rate_update(void *mvm_r,
-			   struct ieee80211_supported_band *sband,
-			   struct cfg80211_chan_def *chandef,
-			   struct ieee80211_sta *sta, void *priv_sta,
-			   u32 changed)
+static void rs_drv_rate_update(void *mvm_r,
+			       struct ieee80211_supported_band *sband,
+			       struct cfg80211_chan_def *chandef,
+			       struct ieee80211_sta *sta,
+			       void *priv_sta, u32 changed)
 {
+	struct iwl_op_mode *op_mode = mvm_r;
+	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
 	u8 tid;
-	struct iwl_op_mode *op_mode  =
-			(struct iwl_op_mode *)mvm_r;
-	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 
 	if (!iwl_mvm_sta_from_mac80211(sta)->vif)
 		return;
@@ -3564,14 +3562,14 @@ static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
 {
 	return hw->priv;
 }
+
 /* rate scale requires free function to be implemented */
 static void rs_free(void *mvm_rate)
 {
 	return;
 }
 
-static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta,
-			void *mvm_sta)
+static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
 {
 	struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
@@ -3982,7 +3980,8 @@ static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
 
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
 
-static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
+static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,
+				   struct dentry *dir)
 {
 	struct iwl_lq_sta *lq_sta = priv_sta;
 	struct iwl_mvm_sta *mvmsta;
@@ -4009,7 +4008,7 @@ static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
 	IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n");
 }
 
-static void rs_remove_debugfs(void *mvm, void *mvm_sta)
+void rs_remove_sta_debugfs(void *mvm, void *mvm_sta)
 {
 }
 #endif
@@ -4019,37 +4018,47 @@ static void rs_remove_debugfs(void *mvm, void *mvm_sta)
  * the station is added. Since mac80211 calls this function before a
  * station is added we ignore it.
  */
-static void rs_rate_init_stub(void *mvm_r,
-			      struct ieee80211_supported_band *sband,
-			      struct cfg80211_chan_def *chandef,
-			      struct ieee80211_sta *sta, void *mvm_sta)
+static void rs_rate_init_ops(void *mvm_r,
+			     struct ieee80211_supported_band *sband,
+			     struct cfg80211_chan_def *chandef,
+			     struct ieee80211_sta *sta, void *mvm_sta)
 {
 }
 
-static const struct rate_control_ops rs_mvm_ops = {
+/* ops for rate scaling implemented in the driver */
+static const struct rate_control_ops rs_mvm_ops_drv = {
 	.name = RS_NAME,
-	.tx_status = rs_mac80211_tx_status,
-	.get_rate = rs_get_rate,
-	.rate_init = rs_rate_init_stub,
+	.tx_status = rs_drv_mac80211_tx_status,
+	.get_rate = rs_drv_get_rate,
+	.rate_init = rs_rate_init_ops,
 	.alloc = rs_alloc,
 	.free = rs_free,
-	.alloc_sta = rs_alloc_sta,
+	.alloc_sta = rs_drv_alloc_sta,
 	.free_sta = rs_free_sta,
-	.rate_update = rs_rate_update,
+	.rate_update = rs_drv_rate_update,
 #ifdef CONFIG_MAC80211_DEBUGFS
-	.add_sta_debugfs = rs_add_debugfs,
-	.remove_sta_debugfs = rs_remove_debugfs,
+	.add_sta_debugfs = rs_drv_add_sta_debugfs,
+	.remove_sta_debugfs = rs_remove_sta_debugfs,
 #endif
 };
 
+void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			  enum nl80211_band band, bool init)
+{
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		rs_fw_rate_init(mvm, sta, band);
+	else
+		rs_drv_rate_init(mvm, sta, band, init);
+}
+
 int iwl_mvm_rate_control_register(void)
 {
-	return ieee80211_rate_control_register(&rs_mvm_ops);
+	return ieee80211_rate_control_register(&rs_mvm_ops_drv);
 }
 
 void iwl_mvm_rate_control_unregister(void)
 {
-	ieee80211_rate_control_unregister(&rs_mvm_ops);
+	ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
 }
 
 /**
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
index 5075a8061c82..eb92ded8a4dc 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
@@ -36,6 +36,8 @@
 #include "fw-api.h"
 #include "iwl-trans.h"
 
+#define RS_NAME "iwl-mvm-rs"
+
 struct iwl_rs_rate_info {
 	u8 plcp;	  /* uCode API:  IWL_RATE_6M_PLCP, etc. */
 	u8 plcp_ht_siso;  /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
@@ -438,4 +440,16 @@ struct iwl_mvm_sta;
 
 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 			  bool enable);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm);
+#endif
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+void rs_remove_sta_debugfs(void *mvm, void *mvm_sta);
+#endif
+
+void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta);
+void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+		     enum nl80211_band band);
 #endif /* __rs__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 12875f773a86..6ed9a8eae107 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -1439,6 +1439,13 @@ int iwl_mvm_add_sta(struct iwl_mvm *mvm,
 			goto err;
 	}
 
+	/*
+	 * if rs is registered with mac80211, then "add station" will be handled
+	 * via the corresponding ops, otherwise need to notify rate scaling here
+	 */
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		iwl_mvm_rs_add_sta(mvm, mvm_sta);
+
 update_fw:
 	ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
 	if (ret)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 9e7beecf043a..b65b4e8f8606 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1718,8 +1718,12 @@ static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
 		ba_info->band = chanctx_conf->def.chan->band;
 		iwl_mvm_hwrate_to_tx_status(rate, ba_info);
 
-		IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
-		iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
+		if (!fw_has_capa(&mvm->fw->ucode_capa,
+				 IWL_UCODE_TLV_CAPA_TLC_OFFLOAD)) {
+			IWL_DEBUG_TX_REPLY(mvm,
+					   "No reclaim. Update rs directly\n");
+			iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
+		}
 	}
 
 out:
-- 
2.15.0

Re: [PATCH 12/15] iwlwifi: mvm: enable RX offloading with TKIP and WEP

[Luciano Coelho]

On Sat, 2017-12-02 at 18:28 +0200, Luca Coelho wrote:
> From: David Spinadel <david.spinadel@intel.com>
> 
> Set the flag that indicates that ICV was stripped on if
> this option was enabled in the HW.
> 
> Signed-off-by: David Spinadel <david.spinadel@intel.com>
> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
> ---

I'll move this to my fixes series, because it's needed for the 9000
series, which is currently broken upstream... :(

--
Cheers,
Luca.

Re: [PATCH 13/15] iwlwifi: mvm: mark MIC stripped MPDUs

[Luciano Coelho]

On Sat, 2017-12-02 at 18:28 +0200, Luca Coelho wrote:
> From: Sara Sharon <sara.sharon@intel.com>
> 
> When RADA is active, the hardware decrypts the packets and strips off
> the MIC as it is useless after decryption. Indicate that to mac80211.
> 
> Signed-off-by: Sara Sharon <sara.sharon@intel.com>
> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
> ---
>  drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
> b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
> index 0e6a7dd30aa9..a81ff4163d05 100644
> --- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
> +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
> @@ -253,6 +253,8 @@ static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm,
> struct ieee80211_hdr *hdr,
>  			return -1;
>  
>  		stats->flag |= RX_FLAG_DECRYPTED;
> +		if (pkt_flags & FH_RSCSR_RADA_EN)
> +			stats->flag |= RX_FLAG_MIC_STRIPPED;
>  		*crypt_len = IEEE80211_CCMP_HDR_LEN;
>  		return 0;
>  	case IWL_RX_MPDU_STATUS_SEC_TKIP:

Same thing here, I'll move it to the -fixes series, since it's needed
by 9000-series NICs.

--
Cheers,
Luca.

Re: [PATCH v2 06/15] iwlwifi: mvm: rs: add ops for the new rate scaling in the FW

[Kalle Valo]

Luca Coelho <luca@coelho.fi> writes:

> From: Gregory Greenman <gregory.greenman@intel.com>
>
> This patch introduces a new instance of rate_control_ops for
> the new API (adding only empty stubs here and the subsequent
> patches in the series will fill in the implementation).
> The decision which API to use is done during the register
> step according to FW TLV.
>
> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

[...]

> +void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
> +{
> +	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
> +
> +	IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
> +
> +	lq_sta->pers.drv = mvm;
> +	lq_sta->pers.sta_id = mvmsta->sta_id;
> +	lq_sta->pers.chains = 0;
> +	memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
> +	lq_sta->pers.last_rssi = S8_MIN;
> +	lq_sta->last_rate_n_flags = 0;
> +
> +#ifdef CPTCFG_MAC80211_DEBUGFS
> +	lq_sta->pers.dbg_fixed_rate = 0;
> +#endif
> +}

CPTCFG_ doesn't look right. But no need to resend just because of this,
you can send a followup patch.

-- 
Kalle Valo

Re: [PATCH v2 06/15] iwlwifi: mvm: rs: add ops for the new rate scaling in the FW

[Luciano Coelho]

On Fri, 2017-12-08 at 14:38 +0200, Kalle Valo wrote:
> Luca Coelho <luca@coelho.fi> writes:
> 
> > From: Gregory Greenman <gregory.greenman@intel.com>
> > 
> > This patch introduces a new instance of rate_control_ops for
> > the new API (adding only empty stubs here and the subsequent
> > patches in the series will fill in the implementation).
> > The decision which API to use is done during the register
> > step according to FW TLV.
> > 
> > Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
> > Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
> 
> [...]
> 
> > +void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta
> > *mvmsta)
> > +{
> > +	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
> > +
> > +	IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
> > +
> > +	lq_sta->pers.drv = mvm;
> > +	lq_sta->pers.sta_id = mvmsta->sta_id;
> > +	lq_sta->pers.chains = 0;
> > +	memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta-
> > >pers.chain_signal));
> > +	lq_sta->pers.last_rssi = S8_MIN;
> > +	lq_sta->last_rate_n_flags = 0;
> > +
> > +#ifdef CPTCFG_MAC80211_DEBUGFS
> > +	lq_sta->pers.dbg_fixed_rate = 0;
> > +#endif
> > +}
> 
> CPTCFG_ doesn't look right. But no need to resend just because of
> this,
> you can send a followup patch.

Gack, how come I let this go through? My (actually Emmanuel's ;)
checker script should catch this.  Maybe I forgot to run it on v2?
Sorry, dude!

--
Luca.