qcacmn: Add wbm head/tail pointer stats to dp_txrx_stats

Add wbm head/tail pointer stats to dp_txrx_stats and ring
usage percentage for all SRC and DST rings.
Stats added to the following cmd: iwpriv wlan0 txrx_stats 26 0

CRs-Fixed: 2865996
Change-Id: I7d144d87c5f3485ec9ba85f50b036b69a64e53c6

dp/wifi3.0/dp_main.c

@@ -8375,6 +8375,8 @@ char *dp_srng_get_str_from_hal_ring_type(enum hal_ring_type ring_type)
 		return "Rxdma_monitor_desc";
 	case RXDMA_MONITOR_STATUS:
 		return "Rxdma_monitor_status";
+	case WBM_IDLE_LINK:
+		return "WBM_hw_idle_link";
 	default:
 		dp_err("Invalid ring type");
 		break;

dp/wifi3.0/dp_stats.c

@@ -4998,23 +4998,30 @@ dp_print_ring_stat_from_hal(struct dp_soc *soc,  struct dp_srng *srng,
 	uint32_t headp;
 	int32_t hw_headp = -1;
 	int32_t hw_tailp = -1;
+	uint32_t ring_usage;
 	const char *ring_name;
 	struct hal_soc *hal_soc;
 
 	if (soc && srng && srng->hal_srng) {
 		hal_soc = (struct hal_soc *)soc->hal_soc;
 		ring_name = dp_srng_get_str_from_hal_ring_type(ring_type);
-
 		hal_get_sw_hptp(soc->hal_soc, srng->hal_srng, &tailp, &headp);
+		ring_usage = hal_get_ring_usage(srng->hal_srng,
+						ring_type, &headp, &tailp);
 
-		DP_PRINT_STATS("%s:SW:Head pointer = %d Tail Pointer = %d\n",
-			       ring_name, headp, tailp);
+		DP_PRINT_STATS("%s:SW: Head = %d Tail = %d Ring Usage = %u",
+			       ring_name, headp, tailp, ring_usage);
 
 		hal_get_hw_hptp(soc->hal_soc, srng->hal_srng, &hw_headp,
 				&hw_tailp, ring_type);
-
-		DP_PRINT_STATS("%s:HW:Head pointer = %d Tail Pointer = %d\n",
-			       ring_name, hw_headp, hw_tailp);
+		ring_usage = 0;
+		if (hw_headp >= 0 && tailp >= 0)
+			ring_usage =
+				hal_get_ring_usage(
+					srng->hal_srng, ring_type,
+					&hw_headp, &hw_tailp);
+		DP_PRINT_STATS("%s:HW: Head = %d Tail = %d Ring Usage = %u",
+			       ring_name, hw_headp, hw_tailp, ring_usage);
 	}
 }
 
@@ -5113,6 +5120,9 @@ dp_print_ring_stats(struct dp_pdev *pdev)
 				    RTPM_ID_DP_PRINT_RING_STATS))
 		return;
 
+	dp_print_ring_stat_from_hal(pdev->soc,
+				    &pdev->soc->wbm_idle_link_ring,
+				    WBM_IDLE_LINK);
 	dp_print_ring_stat_from_hal(pdev->soc,
 				    &pdev->soc->reo_exception_ring,
 				    REO_EXCEPTION);

hal/wifi3.0/hal_api.h

@@ -2717,4 +2717,44 @@ void hal_flush_reg_write_work(hal_soc_handle_t hal_handle);
 static inline void hal_flush_reg_write_work(hal_soc_handle_t hal_handle) { }
 #endif
 
+/**
+ * hal_get_ring_usage - Calculate the ring usage percentage
+ * @hal_ring_hdl: Ring pointer
+ * @ring_type: Ring type
+ * @headp: pointer to head value
+ * @tailp: pointer to tail value
+ *
+ * Calculate the ring usage percentage for src and dest rings
+ *
+ * Return: Ring usage percentage
+ */
+static inline
+uint32_t hal_get_ring_usage(
+	hal_ring_handle_t hal_ring_hdl,
+	enum hal_ring_type ring_type, uint32_t *headp, uint32_t *tailp)
+{
+	struct hal_srng *srng = (struct hal_srng *)hal_ring_hdl;
+	uint32_t num_avail, num_valid = 0;
+	uint32_t ring_usage;
+
+	if (srng->ring_dir == HAL_SRNG_SRC_RING) {
+		if (*tailp > *headp)
+			num_avail =  ((*tailp - *headp) / srng->entry_size) - 1;
+		else
+			num_avail = ((srng->ring_size - *headp + *tailp) /
+				     srng->entry_size) - 1;
+		if (ring_type == WBM_IDLE_LINK)
+			num_valid = num_avail;
+		else
+			num_valid = srng->num_entries - num_avail;
+	} else {
+		if (*headp >= *tailp)
+			num_valid = ((*headp - *tailp) / srng->entry_size);
+		else
+			num_valid = ((srng->ring_size - *tailp + *headp) /
+				     srng->entry_size);
+	}
+	ring_usage = (100 * num_valid) / srng->num_entries;
+	return ring_usage;
+}
 #endif /* _HAL_APIH_ */