qcacld-3.0: Add gActiveBpfMode ini item

Active Mode Berkeley Packet Filter (Active BPF) is a new feature that
allows firmware to apply BPF even while the Apps processor is active.
There are 3 modes:
 * Disabled: do not apply BPF in active mode
 * Enabled: apply BPF to all packets in active mode
 * Adaptive: apply BPF up to some threshold to avoid performance impact

Add an ini item called gActiveBpfMode to configure the Active BPF Mode
in firmware.

Change-Id: I6cf60d67238802fe1e1662c040910091f5c25bec
CRs-Fixed: 1111400

core/cds/inc/cds_config.h

@@ -54,6 +54,20 @@ enum cfg_sub_20_channel_width {
 	WLAN_SUB_20_CH_WIDTH_10 = 2,
 };
 
+/**
+ * enum active_bpf_mode - the modes active BPF can operate in
+ * @ACTIVE_BPF_DISABLED: BPF is disabled in active mode
+ * @ACTIVE_BPF_ENABLED: BPF is enabled for all packets
+ * @ACTIVE_BPF_ADAPTIVE: BPF is enabled for packets up to some threshold
+ * @ACTIVE_BPF_MODE_COUNT: The number of active BPF modes
+ */
+enum active_bpf_mode {
+	ACTIVE_BPF_DISABLED = 0,
+	ACTIVE_BPF_ENABLED,
+	ACTIVE_BPF_ADAPTIVE,
+	ACTIVE_BPF_MODE_COUNT
+};
+
 /**
  * struct cds_config_info - Place Holder for cds configuration
  * @max_station: Max station supported
@@ -99,6 +113,7 @@ enum cfg_sub_20_channel_width {
  * @sub_20_channel_width: Sub 20 MHz ch width, ini intersected with fw cap
  * @flow_steering_enabled: Receive flow steering.
  * @is_fw_timeout: Indicate whether crash host when fw timesout or not
+ * @active_bpf_mode: Setting that determines how BPF is applied in active mode
  * Structure for holding cds ini parameters.
  */
 
@@ -151,7 +166,7 @@ struct cds_config_info {
 	bool flow_steering_enabled;
 	bool self_recovery_enabled;
 	bool fw_timeout_crash;
-
 	struct ol_tx_sched_wrr_ac_specs_t ac_specs[TX_WMM_AC_NUM];
+	enum active_bpf_mode active_bpf_mode;
 };
 #endif /* !defined( __CDS_CONFIG_H ) */

core/hdd/inc/wlan_hdd_cfg.h

@@ -9062,6 +9062,30 @@ enum hdd_wext_control {
  * Type declarations
  */
 
+/*
+ * <ini>
+ * gActiveBpfMode - Control active BPF mode
+ * @Min: 0 (disabled)
+ * @Max: 2 (adaptive)
+ * @Default: 0 (disabled)
+ *
+ * This config item is used to control BPF in active mode. There are 3 modes:
+ *	0) disabled - BPF is disabled in active mode
+ *	1) enabled - BPF is enabled for all packets in active mode
+ *	2) adaptive - BPF is enabled for packets up to some throughput threshold
+ *
+ * Related: N/A
+ *
+ * Supported Feature: Active Mode BPF
+ *
+ * Usage: Internal/External
+ * </ini>
+ */
+#define CFG_ACTIVE_BPF_MODE_NAME    "gActiveBpfMode"
+#define CFG_ACTIVE_BPF_MODE_MIN     (ACTIVE_BPF_DISABLED)
+#define CFG_ACTIVE_BPF_MODE_MAX     (ACTIVE_BPF_MODE_COUNT - 1)
+#define CFG_ACTIVE_BPF_MODE_DEFAULT (ACTIVE_BPF_DISABLED)
+
 struct hdd_config {
 	/* Bitmap to track what is explicitly configured */
 	DECLARE_BITMAP(bExplicitCfg, MAX_CFG_INI_ITEMS);
@@ -9766,6 +9790,7 @@ struct hdd_config {
 	uint32_t per_roam_th_percent;
 	uint32_t per_roam_rest_time;
 	uint32_t per_roam_mon_time;
+	enum active_bpf_mode active_bpf_mode;
 };
 
 #define VAR_OFFSET(_Struct, _Var) (offsetof(_Struct, _Var))

core/hdd/src/wlan_hdd_cfg.c

@@ -4251,6 +4251,12 @@ REG_TABLE_ENTRY g_registry_table[] = {
 		CFG_PER_ROAM_MONITOR_TIME_MIN,
 		CFG_PER_ROAM_MONITOR_TIME_MAX),
 
+	REG_VARIABLE(CFG_ACTIVE_BPF_MODE_NAME, WLAN_PARAM_Integer,
+		struct hdd_config, active_bpf_mode,
+		VAR_FLAGS_OPTIONAL | VAR_FLAGS_RANGE_CHECK_ASSUME_DEFAULT,
+		CFG_ACTIVE_BPF_MODE_DEFAULT,
+		CFG_ACTIVE_BPF_MODE_MIN,
+		CFG_ACTIVE_BPF_MODE_MAX),
 };
 
 /**

core/hdd/src/wlan_hdd_main.c

@@ -7604,6 +7604,7 @@ static int hdd_update_cds_config(hdd_context_t *hdd_ctx)
 	cds_cfg->flow_steering_enabled = hdd_ctx->config->flow_steering_enable;
 	cds_cfg->self_recovery_enabled = hdd_ctx->config->enableSelfRecovery;
 	cds_cfg->fw_timeout_crash = hdd_ctx->config->fw_timeout_crash;
+	cds_cfg->active_bpf_mode = hdd_ctx->config->active_bpf_mode;
 
 	hdd_ra_populate_cds_config(cds_cfg, hdd_ctx);
 	hdd_txrx_populate_cds_config(cds_cfg, hdd_ctx);

core/wma/inc/wma.h

@@ -1374,7 +1374,8 @@ struct extended_caps {
  * It contains global wma module parameters and
  * handle of other modules.
  * @saved_wmi_init_cmd: Saved WMI INIT command
- * @bool bpf_packet_filter_enable: BPF filter enabled or not
+ * @bpf_packet_filter_enable: BPF filter enabled or not
+ * @active_bpf_mode: Setting that determines how BPF is applied in active mode
  * @service_ready_ext_evt: Wait event for service ready ext
  * @wmi_cmd_rsp_wake_lock: wmi command response wake lock
  * @wmi_cmd_rsp_runtime_lock: wmi command response bus lock
@@ -1549,6 +1550,7 @@ typedef struct {
 	uint32_t fine_time_measurement_cap;
 	bool bpf_enabled;
 	bool bpf_packet_filter_enable;
+	enum active_bpf_mode active_bpf_mode;
 	struct wma_ini_config ini_config;
 	struct wma_valid_channels saved_chan;
 	/* NAN datapath support enabled in firmware */

core/wma/src/wma_dev_if.c

@@ -59,7 +59,6 @@
 #endif /* REMOVE_PKT_LOG */
 
 #include "dbglog_host.h"
-/* FIXME: Inclusion of .c looks odd but this is how it is in internal codebase */
 #include "csr_api.h"
 
 #include "dfs.h"
@@ -1356,6 +1355,44 @@ static int wma_remove_bss_peer(tp_wma_handle wma, void *pdev,
 	return 0;
 }
 
+/**
+ * wma_config_active_bpf_mode() - Config active BPF mode in FW
+ * @wma: the WMA handle
+ * @vdev_id: the Id of the vdev for which the configuration should be applied
+ *
+ * Return: QDF status
+ */
+static QDF_STATUS wma_config_active_bpf_mode(t_wma_handle *wma, uint8_t vdev_id)
+{
+	/* for now, hard code mc/bc mode to enabled */
+	const enum wmi_host_active_bpf_mode mcbc_mode =
+		WMI_HOST_ACTIVE_BPF_ENABLED;
+	enum wmi_host_active_bpf_mode uc_mode;
+
+	WMA_LOGI("Configuring Active BPF Mode %d for vdev %u",
+		 wma->active_bpf_mode, vdev_id);
+
+	switch (wma->active_bpf_mode) {
+	case ACTIVE_BPF_DISABLED:
+		uc_mode = FW_ACTIVE_BPF_MODE_DISABLE;
+		break;
+	case ACTIVE_BPF_ENABLED:
+		uc_mode = FW_ACTIVE_BPF_MODE_FORCE_ENABLE;
+		break;
+	case ACTIVE_BPF_ADAPTIVE:
+		uc_mode = FW_ACTIVE_BPF_MODE_ADAPTIVE_ENABLE;
+		break;
+	default:
+		WMA_LOGE("Invalid Active BPF Mode %d; Using 'disabled'",
+			 wma->active_bpf_mode);
+		uc_mode = FW_ACTIVE_BPF_MODE_DISABLE;
+		break;
+	}
+
+	return wmi_unified_set_active_bpf_mode_cmd(wma->wmi_handle, vdev_id,
+						   uc_mode, mcbc_mode);
+}
+
 /**
  * wma_vdev_stop_resp_handler() - vdev stop response handler
  * @handle: wma handle
@@ -1784,6 +1821,14 @@ struct cdp_vdev *wma_vdev_attach(tp_wma_handle wma_handle,
 	} else {
 		WMA_LOGE("Failed to get value for WNI_CFG_ENABLE_MCC_ADAPTIVE_SCHED, leaving unchanged");
 	}
+
+	if (self_sta_req->type == WMI_VDEV_TYPE_STA) {
+		status = wma_config_active_bpf_mode(wma_handle,
+						    self_sta_req->session_id);
+		if (QDF_IS_STATUS_ERROR(status))
+			WMA_LOGE("Failed to configure active BPF mode");
+	}
+
 end:
 	self_sta_req->status = status;
 

core/wma/src/wma_main.c

@@ -2193,6 +2193,7 @@ QDF_STATUS wma_open(struct wlan_objmgr_psoc *psoc, void *cds_context,
 	wma_handle->enable_mc_list = cds_cfg->enable_mc_list;
 	wma_handle->bpf_packet_filter_enable =
 		cds_cfg->bpf_packet_filter_enable;
+	wma_handle->active_bpf_mode = cds_cfg->active_bpf_mode;
 	wma_handle->link_stats_results = NULL;
 #ifdef FEATURE_WLAN_RA_FILTERING
 	wma_handle->IsRArateLimitEnabled = cds_cfg->is_ra_ratelimit_enabled;