qcacmn: Enable napi to re-enable interrupts

When NAPI is busy processing Rx, interrupt is not re-enabled
and this causes CE2 and other pipes to become full and target asserts.
This patch enables napi to return after processing half of the descriptors.

Change-Id: I2ba443c388f1a9d36331c632bfb2fbbbe876228f
Crs-fixed: 1094034

hif/src/ce/ce_service.c

@@ -198,6 +198,14 @@ inline void ce_init_ce_desc_event_log(int ce_id, int size)
 }
 #endif
 
+#ifdef NAPI_YIELD_BUDGET_BASED
+bool hif_ce_service_should_yield(struct hif_softc *scn,
+				 struct CE_state *ce_state)
+{
+	bool yield =  hif_max_num_receives_reached(scn, ce_state->receive_count);
+	return yield;
+}
+#else
 /**
  * hif_ce_service_should_yield() - return true if the service is hogging the cpu
  * @scn: hif context
@@ -213,7 +221,7 @@ bool hif_ce_service_should_yield(struct hif_softc *scn,
 		     hif_max_num_receives_reached(scn, ce_state->receive_count);
 	return yield;
 }
-
+#endif
 /*
  * Support for Copy Engine hardware, which is mainly used for
  * communication between Host and Target over a PCIe interconnect.

hif/src/hif_main.c

@@ -196,6 +196,15 @@ uint32_t hif_hia_item_address(uint32_t target_type, uint32_t item_offset)
 	}
 }
 
+#ifdef NAPI_YIELD_BUDGET_BASED
+bool hif_max_num_receives_reached(struct hif_softc *scn, unsigned int count)
+{
+	if (QDF_IS_EPPING_ENABLED(hif_get_conparam(scn)))
+		return count > 120;
+	else
+		return count > MAX_REAP_COUNT_PER_NAPI_POLL;
+}
+#else
 /**
  * hif_max_num_receives_reached() - check max receive is reached
  * @scn: HIF Context
@@ -212,6 +221,7 @@ bool hif_max_num_receives_reached(struct hif_softc *scn, unsigned int count)
 	else
 		return count > MAX_NUM_OF_RECEIVES;
 }
+#endif
 
 /**
  * init_buffer_count() - initial buffer count

hif/src/hif_main.h

@@ -66,6 +66,8 @@
 
 #define MAX_NUM_OF_RECEIVES HIF_NAPI_MAX_RECEIVES
 
+#define MAX_REAP_COUNT_PER_NAPI_POLL 256
+
 #ifdef QCA_WIFI_3_0_ADRASTEA
 #define ADRASTEA_BU 1
 #else

hif/src/hif_napi.c

@@ -761,8 +761,11 @@ int hif_napi_poll(struct hif_opaque_softc *hif_ctx, struct napi_struct *napi,
 	if (0 == rc)
 		NAPI_DEBUG("%s:%d: nothing processed by CE. Completing NAPI",
 			   __func__, __LINE__);
-
+#ifdef NAPI_YIELD_BUDGET_BASED
+	if (ce_state && (ce_state->force_break || 0 == rc)) {
+#else
 	if (ce_state && (!ce_check_rx_pending(ce_state) || 0 == rc)) {
+#endif
 		napi_info->stats[cpu].napi_completes++;
 
 		hif_record_ce_desc_event(hif, ce_state->id, NAPI_COMPLETE,