qcacmn: ini config to allocate special TX descriptors of pdev

An INI dp_tx_spl_desc is defined and can be used to configure the
limit of TX descriptors that can reserved on the pdev to handle
special frames like EAPOL.

CRs-Fixed: 3343209
Change-Id: I6578bddd1f4ea07528c9f66f778b113ec6fb9e61

dp/wifi3.0/dp_main.c

@@ -17204,8 +17204,10 @@ static QDF_STATUS dp_pdev_init(struct cdp_soc_t *txrx_soc,
 	qdf_event_create(&pdev->fw_obss_stats_event);
 
 	pdev->num_tx_allowed = wlan_cfg_get_num_tx_desc(soc->wlan_cfg_ctx);
-	pdev->num_reg_tx_allowed = pdev->num_tx_allowed - MAX_TX_SPL_DESC;
+	pdev->num_tx_spl_allowed =
-
+		wlan_cfg_get_num_tx_spl_desc(soc->wlan_cfg_ctx);
+	pdev->num_reg_tx_allowed =
+		pdev->num_tx_allowed - pdev->num_tx_spl_allowed;
 	if (dp_rxdma_ring_setup(soc, pdev)) {
 		dp_init_err("%pK: RXDMA ring config failed", soc);
 		goto fail3;

dp/wifi3.0/dp_types.h

@@ -3153,6 +3153,9 @@ struct dp_pdev {
 	 */
 	uint32_t num_reg_tx_allowed;
 
+	/* User configured max number of tx buffers for the special frames*/
+	uint32_t num_tx_spl_allowed;
+
 	/* unique cookie required for peer session */
 	uint32_t next_peer_cookie;
 

wlan_cfg/cfg_dp.h

@@ -184,6 +184,10 @@
 #define WLAN_CFG_NUM_TX_DESC_MIN  16
 #define WLAN_CFG_NUM_TX_DESC_MAX  0x10000
 
+#define WLAN_CFG_NUM_TX_SPL_DESC  1024
+#define WLAN_CFG_NUM_TX_SPL_DESC_MIN  0
+#define WLAN_CFG_NUM_TX_SPL_DESC_MAX  0x1000
+
 #define WLAN_CFG_NUM_TX_EXT_DESC_MIN  16
 #define WLAN_CFG_NUM_TX_EXT_DESC_MAX  0x80000
 
@@ -661,6 +665,13 @@
 		WLAN_CFG_NUM_TX_DESC, \
 		CFG_VALUE_OR_DEFAULT, "DP Tx Descriptors")
 
+#define CFG_DP_TX_SPL_DESC \
+		CFG_INI_UINT("dp_tx_spl_desc", \
+		WLAN_CFG_NUM_TX_SPL_DESC_MIN, \
+		WLAN_CFG_NUM_TX_SPL_DESC_MAX, \
+		WLAN_CFG_NUM_TX_SPL_DESC, \
+		CFG_VALUE_OR_DEFAULT, "DP Tx Special Descriptors")
+
 #define CFG_DP_TX_EXT_DESC \
 		CFG_INI_UINT("dp_tx_ext_desc", \
 		WLAN_CFG_NUM_TX_EXT_DESC_MIN, \
@@ -1810,6 +1821,7 @@
 		CFG(CFG_DP_NSS_REO_DEST_RINGS) \
 		CFG(CFG_DP_NSS_TCL_DATA_RINGS) \
 		CFG(CFG_DP_TX_DESC) \
+		CFG(CFG_DP_TX_SPL_DESC) \
 		CFG(CFG_DP_TX_EXT_DESC) \
 		CFG(CFG_DP_TX_EXT_DESC_POOLS) \
 		CFG(CFG_DP_PDEV_RX_RING) \

wlan_cfg/wlan_cfg.c

@@ -2863,6 +2863,7 @@ wlan_cfg_soc_attach(struct cdp_ctrl_objmgr_psoc *psoc)
 	wlan_cfg_ctx->num_tx_ext_desc_pool = cfg_get(psoc,
 						     CFG_DP_TX_EXT_DESC_POOLS);
 	wlan_cfg_ctx->num_tx_desc = cfg_get(psoc, CFG_DP_TX_DESC);
+	wlan_cfg_ctx->num_tx_spl_desc = cfg_get(psoc, CFG_DP_TX_SPL_DESC);
 	wlan_cfg_ctx->min_tx_desc = WLAN_CFG_NUM_TX_DESC_MIN;
 	wlan_cfg_ctx->num_tx_ext_desc = cfg_get(psoc, CFG_DP_TX_EXT_DESC);
 	wlan_cfg_ctx->htt_packet_type = cfg_get(psoc, CFG_DP_HTT_PACKET_TYPE);
@@ -3526,6 +3527,11 @@ int wlan_cfg_get_num_tx_desc(struct wlan_cfg_dp_soc_ctxt *cfg)
 	return cfg->num_tx_desc;
 }
 
+int wlan_cfg_get_num_tx_spl_desc(struct wlan_cfg_dp_soc_ctxt *cfg)
+{
+	return cfg->num_tx_spl_desc;
+}
+
 void wlan_cfg_set_num_tx_desc(struct wlan_cfg_dp_soc_ctxt *cfg, int num_desc)
 {
 	cfg->num_tx_desc = num_desc;

wlan_cfg/wlan_cfg.h

@@ -154,6 +154,7 @@ struct wlan_srng_cfg {
  * @num_tx_desc_pool: Number of Tx Descriptor pools
  * @num_tx_ext_desc_pool: Number of Tx MSDU extension Descriptor pools
  * @num_tx_desc: Number of Tx Descriptors per pool
+ * @num_tx_spl_desc: Number of Tx Descriptors per pool to handle special frames
  * @min_tx_desc: Minimum number of Tx Descriptors per pool
  * @num_tx_ext_desc: Number of Tx MSDU extension Descriptors per pool
  * @max_peer_id: Maximum value of peer id that FW can assign for a client
@@ -341,6 +342,7 @@ struct wlan_cfg_dp_soc_ctxt {
 	int num_tx_desc_pool;
 	int num_tx_ext_desc_pool;
 	int num_tx_desc;
+	int num_tx_spl_desc;
 	int min_tx_desc;
 	int num_tx_ext_desc;
 	int max_peer_id;
@@ -1184,6 +1186,15 @@ void wlan_cfg_set_num_tx_ext_desc_pool(struct wlan_cfg_dp_soc_ctxt *cfg, int num
  */
 int wlan_cfg_get_num_tx_desc(struct wlan_cfg_dp_soc_ctxt *wlan_cfg_ctx);
 
+/**
+ * wlan_cfg_get_num_tx_spl_desc() - Number of Tx Descriptors for special
+ *				    frames per pool
+ * @wlan_cfg_ctx: Configuration Handle
+ *
+ * Return: num_tx_desc
+ */
+int wlan_cfg_get_num_tx_spl_desc(struct wlan_cfg_dp_soc_ctxt *wlan_cfg_ctx);
+
 /**
  * wlan_cfg_get_min_tx_desc() - Minimum number of Tx Descriptors per pool
  * @wlan_cfg_ctx: Configuration Handle