msm: ipa3: Reduce NAPI weight to 32

observing the shadow stack overflow due to skb is
chained using the frag_list more than 64. To reduce the
skb chained reducing the NAPI weight to 32.

Change-Id: I1164c7d8e886a1079d30c213c91827b0aa191db2
Signed-off-by: Ashok Vuyyuru <[email protected]>

drivers/platform/msm/ipa/ipa_v3/ipa.c

@@ -7433,6 +7433,7 @@ static int ipa3_pre_init(const struct ipa3_plat_drv_res *resource_p,
 		resource_p->ipa_holb_monitor_max_cnt_usb;
 	ipa3_ctx->uc_ctx.holb_monitor.max_cnt_11ad =
 		resource_p->ipa_holb_monitor_max_cnt_11ad;
+	ipa3_ctx->ipa_wan_aggr_pkt_cnt = resource_p->ipa_wan_aggr_pkt_cnt;
 	ipa3_ctx->stats.page_recycle_stats[0].total_replenished = 0;
 	ipa3_ctx->stats.page_recycle_stats[0].tmp_alloc = 0;
 	ipa3_ctx->stats.page_recycle_stats[1].total_replenished = 0;
@@ -8204,6 +8205,7 @@ static int get_ipa_dts_configuration(struct platform_device *pdev,
 	u32 ipa_holb_monitor_max_cnt_wlan;
 	u32 ipa_holb_monitor_max_cnt_usb;
 	u32 ipa_holb_monitor_max_cnt_11ad;
+	u32 ipa_wan_aggr_pkt_cnt;
 
 	/* initialize ipa3_res */
 	ipa_drv_res->ipa_pipe_mem_start_ofst = IPA_PIPE_MEM_START_OFST;
@@ -8768,6 +8770,19 @@ static int get_ipa_dts_configuration(struct platform_device *pdev,
 	IPADBG(": secure-debug-check-action = %d\n",
 		   ipa_drv_res->secure_debug_check_action);
 
+
+	result = of_property_read_u32(
+		pdev->dev.of_node,
+		"qcom,ipa-wan-aggr-pkt-cnt",
+		&ipa_wan_aggr_pkt_cnt);
+	if (result) {
+		ipa_wan_aggr_pkt_cnt = IPA_WAN_AGGR_PKT_CNT;
+		IPADBG("ipa wan aggr pkt cnt = %u\n", ipa_wan_aggr_pkt_cnt);
+	} else
+		IPADBG("ipa wan aggr pkt cnt = %u\n", ipa_wan_aggr_pkt_cnt);
+
+	ipa_drv_res->ipa_wan_aggr_pkt_cnt = ipa_wan_aggr_pkt_cnt;
+
 	get_dts_tx_wrapper_cache_size(pdev, ipa_drv_res);
 
 	return 0;

drivers/platform/msm/ipa/ipa_v3/ipa_dp.c

@@ -18,7 +18,6 @@
 #include "ipahal_fltrt.h"
 
 #define IPA_GSI_EVENT_RP_SIZE 8
-#define IPA_WAN_AGGR_PKT_CNT 1
 #define IPA_WAN_NAPI_MAX_FRAMES (NAPI_WEIGHT / IPA_WAN_AGGR_PKT_CNT)
 #define IPA_WAN_PAGE_ORDER 3
 #define IPA_LAN_AGGR_PKT_CNT 1
@@ -5280,7 +5279,7 @@ int ipa3_rx_poll(u32 clnt_hdl, int weight)
 	trace_ipa3_napi_poll_entry(ep->client);
 
 	wan_def_sys = ipa3_ctx->ep[ipa_ep_idx].sys;
-	remain_aggr_weight = weight / IPA_WAN_AGGR_PKT_CNT;
+	remain_aggr_weight = weight / ipa3_ctx->ipa_wan_aggr_pkt_cnt;
 	if (remain_aggr_weight > IPA_WAN_NAPI_MAX_FRAMES) {
 		IPAERR("NAPI weight is higher than expected\n");
 		IPAERR("expected %d got %d\n",
@@ -5313,7 +5312,7 @@ start_poll:
 			break;
 		}
 	}
-	cnt += weight - remain_aggr_weight * IPA_WAN_AGGR_PKT_CNT;
+	cnt += weight - remain_aggr_weight * ipa3_ctx->ipa_wan_aggr_pkt_cnt;
 	/* call repl_hdlr before napi_reschedule / napi_complete */
 	ep->sys->repl_hdlr(ep->sys);
 	/* When not able to replenish enough descriptors, keep in polling

drivers/platform/msm/ipa/ipa_v3/ipa_i.h

@@ -84,6 +84,8 @@
 
 #define NAPI_TX_WEIGHT 64
 
+#define IPA_WAN_AGGR_PKT_CNT 1
+
 #define IPADBG(fmt, args...) \
 	do { \
 		pr_debug(DRV_NAME " %s:%d " fmt, __func__, __LINE__, ## args);\
@@ -2169,6 +2171,7 @@ struct ipa3_context {
 	char *uc_fw_file_name;
 	struct ipa3_eth_info
 		eth_info[IPA_ETH_CLIENT_MAX][IPA_ETH_INST_ID_MAX];
+	u32 ipa_wan_aggr_pkt_cnt;
 };
 
 struct ipa3_plat_drv_res {
@@ -2235,6 +2238,7 @@ struct ipa3_plat_drv_res {
 	const char *gsi_fw_file_name;
 	const char *uc_fw_file_name;
 	u32 tx_wrapper_cache_max_size;
+	u32 ipa_wan_aggr_pkt_cnt;
 };
 
 /**