qcacmn: suspend/resume changes for WCN6450

Changes required for suspend/resume support for WCN6450

Change-Id: I4610f6bdb8de92f03884af6c07a5141dd27174be
CRs-Fixed: 3447469

dp/wifi3.0/dp_main.c

@@ -10679,6 +10679,93 @@ inline void dp_find_missing_tx_comp(struct dp_soc *soc)
 }
 #endif
 
+#ifdef FEATURE_RUNTIME_PM
+/**
+ * dp_runtime_suspend() - ensure DP is ready to runtime suspend
+ * @soc_hdl: Datapath soc handle
+ * @pdev_id: id of data path pdev handle
+ *
+ * DP is ready to runtime suspend if there are no pending TX packets.
+ *
+ * Return: QDF_STATUS
+ */
+static QDF_STATUS dp_runtime_suspend(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
+{
+	struct dp_soc *soc = cdp_soc_t_to_dp_soc(soc_hdl);
+	struct dp_pdev *pdev;
+	int32_t tx_pending;
+
+	pdev = dp_get_pdev_from_soc_pdev_id_wifi3(soc, pdev_id);
+	if (!pdev) {
+		dp_err("pdev is NULL");
+		return QDF_STATUS_E_INVAL;
+	}
+
+	/* Abort if there are any pending TX packets */
+	tx_pending = dp_get_tx_pending(dp_pdev_to_cdp_pdev(pdev));
+	if (tx_pending) {
+		dp_info_rl("%pK: Abort suspend due to pending TX packets %d",
+			   soc, tx_pending);
+		dp_find_missing_tx_comp(soc);
+		/* perform a force flush if tx is pending */
+		soc->arch_ops.dp_update_ring_hptp(soc, true);
+		qdf_atomic_set(&soc->tx_pending_rtpm, 0);
+
+		return QDF_STATUS_E_AGAIN;
+	}
+
+	if (dp_runtime_get_refcount(soc)) {
+		dp_init_info("refcount: %d", dp_runtime_get_refcount(soc));
+
+		return QDF_STATUS_E_AGAIN;
+	}
+
+	if (soc->intr_mode == DP_INTR_POLL)
+		qdf_timer_stop(&soc->int_timer);
+
+	dp_rx_fst_update_pm_suspend_status(soc, true);
+
+	return QDF_STATUS_SUCCESS;
+}
+
+#define DP_FLUSH_WAIT_CNT 10
+#define DP_RUNTIME_SUSPEND_WAIT_MS 10
+/**
+ * dp_runtime_resume() - ensure DP is ready to runtime resume
+ * @soc_hdl: Datapath soc handle
+ * @pdev_id: id of data path pdev handle
+ *
+ * Resume DP for runtime PM.
+ *
+ * Return: QDF_STATUS
+ */
+static QDF_STATUS dp_runtime_resume(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
+{
+	struct dp_soc *soc = cdp_soc_t_to_dp_soc(soc_hdl);
+	int suspend_wait = 0;
+
+	if (soc->intr_mode == DP_INTR_POLL)
+		qdf_timer_mod(&soc->int_timer, DP_INTR_POLL_TIMER_MS);
+
+	/*
+	 * Wait until dp runtime refcount becomes zero or time out, then flush
+	 * pending tx for runtime suspend.
+	 */
+	while (dp_runtime_get_refcount(soc) &&
+	       suspend_wait < DP_FLUSH_WAIT_CNT) {
+		qdf_sleep(DP_RUNTIME_SUSPEND_WAIT_MS);
+		suspend_wait++;
+	}
+
+	soc->arch_ops.dp_update_ring_hptp(soc, false);
+	qdf_atomic_set(&soc->tx_pending_rtpm, 0);
+
+	dp_rx_fst_update_pm_suspend_status(soc, false);
+
+	return QDF_STATUS_SUCCESS;
+}
+#endif /* FEATURE_RUNTIME_PM */
+
 /**
  * dp_tx_get_success_ack_stats() - get tx success completion count
  * @soc_hdl: Datapath soc handle
@@ -11174,7 +11261,6 @@ static QDF_STATUS dp_bus_resume(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
 {
 	struct dp_soc *soc = cdp_soc_t_to_dp_soc(soc_hdl);
 	struct dp_pdev *pdev = dp_get_pdev_from_soc_pdev_id_wifi3(soc, pdev_id);
-	uint8_t i;
 
 	if (qdf_unlikely(!pdev)) {
 		dp_err("pdev is NULL");
@@ -11189,10 +11275,8 @@ static QDF_STATUS dp_bus_resume(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
 
 	dp_resume_fse_cache_flush(soc);
 
-	for (i = 0; i < soc->num_tcl_data_rings; i++)
-		dp_flush_ring_hptp(soc, soc->tcl_data_ring[i].hal_srng);
+	soc->arch_ops.dp_update_ring_hptp(soc, false);
 
-	dp_flush_ring_hptp(soc, soc->reo_cmd_ring.hal_srng);
 	dp_rx_fst_update_pm_suspend_status(soc, false);
 
 	dp_rx_fst_requeue_wq(soc);