iwlwifi: mvm: Add new quota command API

New quota command adds a field indicating low latency
direction per quota.

A TLV API bit was added to indicate the new API.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/api/binding.h

@@ -116,14 +116,14 @@ struct iwl_binding_cmd {
 #define IWL_MVM_MAX_QUOTA 128
 
 /**
- * struct iwl_time_quota_data - configuration of time quota per binding
+ * struct iwl_time_quota_data_v1 - configuration of time quota per binding
  * @id_and_color: ID and color of the relevant Binding,
  *	&enum iwl_ctxt_id_and_color
  * @quota: absolute time quota in TU. The scheduler will try to divide the
  *	remainig quota (after Time Events) according to this quota.
  * @max_duration: max uninterrupted context duration in TU
  */
-struct iwl_time_quota_data {
+struct iwl_time_quota_data_v1 {
 	__le32 id_and_color;
 	__le32 quota;
 	__le32 max_duration;
@@ -137,8 +137,43 @@ struct iwl_time_quota_data {
  *	essentially zero.
  *	On CDB the fourth one is a regular binding.
  */
+struct iwl_time_quota_cmd_v1 {
+	struct iwl_time_quota_data_v1 quotas[MAX_BINDINGS];
+} __packed; /* TIME_QUOTA_ALLOCATION_CMD_API_S_VER_1 */
+
+enum iwl_quota_low_latency {
+	IWL_QUOTA_LOW_LATENCY_NONE = 0,
+	IWL_QUOTA_LOW_LATENCY_TX = BIT(0),
+	IWL_QUOTA_LOW_LATENCY_RX = BIT(1),
+	IWL_QUOTA_LOW_LATENCY_TX_RX =
+		IWL_QUOTA_LOW_LATENCY_TX | IWL_QUOTA_LOW_LATENCY_RX,
+};
+
+/**
+ * struct iwl_time_quota_data - configuration of time quota per binding
+ * @id_and_color: ID and color of the relevant Binding.
+ * @quota: absolute time quota in TU. The scheduler will try to divide the
+ *	remainig quota (after Time Events) according to this quota.
+ * @max_duration: max uninterrupted context duration in TU
+ * @low_latency: low latency status, &enum iwl_quota_low_latency
+ */
+struct iwl_time_quota_data {
+	__le32 id_and_color;
+	__le32 quota;
+	__le32 max_duration;
+	__le32 low_latency;
+} __packed; /* TIME_QUOTA_DATA_API_S_VER_2 */
+
+/**
+ * struct iwl_time_quota_cmd - configuration of time quota between bindings
+ * ( TIME_QUOTA_CMD = 0x2c )
+ * Note: on non-CDB the fourth one is the auxilary mac and is essentially zero.
+ * On CDB the fourth one is a regular binding.
+ *
+ * @quotas: allocations per binding
+ */
 struct iwl_time_quota_cmd {
 	struct iwl_time_quota_data quotas[MAX_BINDINGS];
-} __packed; /* TIME_QUOTA_ALLOCATION_CMD_API_S_VER_1 */
+} __packed; /* TIME_QUOTA_ALLOCATION_CMD_API_S_VER_2 */
 
 #endif /* __iwl_fw_api_binding_h__ */

drivers/net/wireless/intel/iwlwifi/fw/file.h

@@ -248,6 +248,8 @@ typedef unsigned int __bitwise iwl_ucode_tlv_api_t;
  * @IWL_UCODE_TLV_API_NEW_RX_STATS: should new RX STATISTICS API be used
  * @IWL_UCODE_TLV_API_ATS_COEX_EXTERNAL: the coex notification is enlared to
  *	include information about ACL time sharing.
+ * @IWL_UCODE_TLV_API_QUOTA_LOW_LATENCY: Quota command includes a field
+ *	indicating low latency direction.
  *
  * @NUM_IWL_UCODE_TLV_API: number of bits used
  */
@@ -265,6 +267,7 @@ enum iwl_ucode_tlv_api {
 	IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE	= (__force iwl_ucode_tlv_api_t)34,
 	IWL_UCODE_TLV_API_NEW_RX_STATS		= (__force iwl_ucode_tlv_api_t)35,
 	IWL_UCODE_TLV_API_COEX_ATS_EXTERNAL	= (__force iwl_ucode_tlv_api_t)37,
+	IWL_UCODE_TLV_API_QUOTA_LOW_LATENCY	= (__force iwl_ucode_tlv_api_t)38,
 
 	NUM_IWL_UCODE_TLV_API
 #ifdef __CHECKER__

drivers/net/wireless/intel/iwlwifi/mvm/d3.c

@@ -664,6 +664,7 @@ static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 	int ret, i;
 	struct iwl_binding_cmd binding_cmd = {};
 	struct iwl_time_quota_cmd quota_cmd = {};
+	struct iwl_time_quota_data *quota;
 	u32 status;
 	int size;
 
@@ -745,17 +746,20 @@ static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 		return ret;
 
 	/* and some quota */
-	quota_cmd.quotas[0].id_and_color =
+	quota = iwl_mvm_quota_cmd_get_quota(mvm, &quota_cmd, 0);
+	quota->id_and_color =
 		cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 						mvmvif->phy_ctxt->color));
-	quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
-	quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
+	quota->quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
+	quota->max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 
-	for (i = 1; i < MAX_BINDINGS; i++)
-		quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
+	for (i = 1; i < MAX_BINDINGS; i++) {
+		quota = iwl_mvm_quota_cmd_get_quota(mvm, &quota_cmd, i);
+		quota->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
+	}
 
 	ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
-				   sizeof(quota_cmd), &quota_cmd);
+				   iwl_mvm_quota_cmd_size(mvm), &quota_cmd);
 	if (ret)
 		IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -1248,6 +1248,12 @@ static inline bool iwl_mvm_has_new_ats_coex_api(struct iwl_mvm *mvm)
 			  IWL_UCODE_TLV_API_COEX_ATS_EXTERNAL);
 }
 
+static inline bool iwl_mvm_has_quota_low_latency(struct iwl_mvm *mvm)
+{
+	return fw_has_api(&mvm->fw->ucode_capa,
+			  IWL_UCODE_TLV_API_QUOTA_LOW_LATENCY);
+}
+
 static inline struct agg_tx_status *
 iwl_mvm_get_agg_status(struct iwl_mvm *mvm, void *tx_resp)
 {
@@ -1486,6 +1492,27 @@ int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
 int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
 
 /* Quota management */
+static inline size_t iwl_mvm_quota_cmd_size(struct iwl_mvm *mvm)
+{
+	return iwl_mvm_has_quota_low_latency(mvm) ?
+		sizeof(struct iwl_time_quota_cmd) :
+		sizeof(struct iwl_time_quota_cmd_v1);
+}
+
+static inline struct iwl_time_quota_data
+*iwl_mvm_quota_cmd_get_quota(struct iwl_mvm *mvm,
+			     struct iwl_time_quota_cmd *cmd,
+			     int i)
+{
+	struct iwl_time_quota_data_v1 *quotas;
+
+	if (iwl_mvm_has_quota_low_latency(mvm))
+		return &cmd->quotas[i];
+
+	quotas = (struct iwl_time_quota_data_v1 *)cmd->quotas;
+	return (struct iwl_time_quota_data *)&quotas[i];
+}
+
 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, bool force_upload,
 			  struct ieee80211_vif *disabled_vif);
 

drivers/net/wireless/intel/iwlwifi/mvm/quota.c

@@ -7,7 +7,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
- * Copyright(c) 2016        Intel Deutschland GmbH
+ * Copyright(c) 2016 - 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
@@ -34,7 +34,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
- * Copyright(c) 2016        Intel Deutschland GmbH
+ * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -164,9 +164,12 @@ static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
 	beacon_int = mvm->noa_vif->bss_conf.beacon_int;
 
 	for (i = 0; i < MAX_BINDINGS; i++) {
-		u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color);
+		struct iwl_time_quota_data *data =
+					iwl_mvm_quota_cmd_get_quota(mvm, cmd,
+								    i);
+		u32 id_n_c = le32_to_cpu(data->id_and_color);
 		u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
-		u32 quota = le32_to_cpu(cmd->quotas[i].quota);
+		u32 quota = le32_to_cpu(data->quota);
 
 		if (id != phy_id)
 			continue;
@@ -175,9 +178,9 @@ static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
 		quota /= beacon_int;
 
 		IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
-				le32_to_cpu(cmd->quotas[i].quota), quota);
+				le32_to_cpu(data->quota), quota);
 
-		cmd->quotas[i].quota = cpu_to_le32(quota);
+		data->quota = cpu_to_le32(quota);
 	}
 #endif
 }
@@ -194,6 +197,7 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 		.disabled_vif = disabled_vif,
 	};
 	struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
+	struct iwl_time_quota_data *qdata, *last_data;
 	bool send = false;
 
 	lockdep_assert_held(&mvm->mutex);
@@ -216,7 +220,8 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 	 */
 	num_active_macs = 0;
 	for (i = 0; i < MAX_BINDINGS; i++) {
-		cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
+		qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 		num_active_macs += data.n_interfaces[i];
 	}
 
@@ -265,14 +270,16 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 		if (data.colors[i] < 0)
 			continue;
 
-		cmd.quotas[idx].id_and_color =
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx);
+
+		qdata->id_and_color =
 			cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
 
 		if (data.n_interfaces[i] <= 0)
-			cmd.quotas[idx].quota = cpu_to_le32(0);
+			qdata->quota = cpu_to_le32(0);
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 		else if (data.dbgfs_min[i])
-			cmd.quotas[idx].quota =
+			qdata->quota =
 				cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
 #endif
 		else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
@@ -283,24 +290,25 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 			 * the minimal required quota for the low latency
 			 * binding.
 			 */
-			cmd.quotas[idx].quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
+			qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
 		else
-			cmd.quotas[idx].quota =
+			qdata->quota =
 				cpu_to_le32(quota * data.n_interfaces[i]);
 
-		WARN_ONCE(le32_to_cpu(cmd.quotas[idx].quota) > QUOTA_100,
+		WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100,
 			  "Binding=%d, quota=%u > max=%u\n",
-			  idx, le32_to_cpu(cmd.quotas[idx].quota), QUOTA_100);
+			  idx, le32_to_cpu(qdata->quota), QUOTA_100);
 
-		cmd.quotas[idx].max_duration = cpu_to_le32(0);
+		qdata->max_duration = cpu_to_le32(0);
 
 		idx++;
 	}
 
 	/* Give the remainder of the session to the first data binding */
 	for (i = 0; i < MAX_BINDINGS; i++) {
-		if (le32_to_cpu(cmd.quotas[i].quota) != 0) {
-			le32_add_cpu(&cmd.quotas[i].quota, quota_rem);
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
+		if (le32_to_cpu(qdata->quota) != 0) {
+			le32_add_cpu(&qdata->quota, quota_rem);
 			IWL_DEBUG_QUOTA(mvm,
 					"quota: giving remainder of %d to binding %d\n",
 					quota_rem, i);
@@ -312,17 +320,19 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 
 	/* check that we have non-zero quota for all valid bindings */
 	for (i = 0; i < MAX_BINDINGS; i++) {
-		if (cmd.quotas[i].id_and_color != last->quotas[i].id_and_color)
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
+		last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i);
+		if (qdata->id_and_color != last_data->id_and_color)
 			send = true;
-		if (cmd.quotas[i].max_duration != last->quotas[i].max_duration)
+		if (qdata->max_duration != last_data->max_duration)
 			send = true;
-		if (abs((int)le32_to_cpu(cmd.quotas[i].quota) -
-			(int)le32_to_cpu(last->quotas[i].quota))
+		if (abs((int)le32_to_cpu(qdata->quota) -
+			(int)le32_to_cpu(last_data->quota))
 						> IWL_MVM_QUOTA_THRESHOLD)
 			send = true;
-		if (cmd.quotas[i].id_and_color == cpu_to_le32(FW_CTXT_INVALID))
+		if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID))
 			continue;
-		WARN_ONCE(cmd.quotas[i].quota == 0,
+		WARN_ONCE(qdata->quota == 0,
 			  "zero quota on binding %d\n", i);
 	}
 
@@ -334,7 +344,8 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 		return 0;
 	}
 
-	err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, sizeof(cmd), &cmd);
+	err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
+				   iwl_mvm_quota_cmd_size(mvm), &cmd);
 
 	if (err)
 		IWL_ERR(mvm, "Failed to send quota: %d\n", err);