qcacmn: replenish complete rx_refill ring in UMAC reset

In case of UMAC reset if in_use buffers are sufficient
to fill complete RX refill ring we are replenishing
only 1/3rd ring at pre-reset.

In case of low threshold interrupts disabled ring might
be never refilled. At post reset refill complete ring.

Change-Id: I0e4ed942120619ef357bc91f8cbbab8c1fd1b06e
CRs-Fixed: 3628996

dp/wifi3.0/dp_main.c

@@ -1974,8 +1974,6 @@ int dp_process_lmac_rings(struct dp_intr *int_ctx, int total_budget)
 		}
 
 		if (int_ctx->host2rxdma_ring_mask & (1 << mac_for_pdev)) {
-			union dp_rx_desc_list_elem_t *desc_list = NULL;
-			union dp_rx_desc_list_elem_t *tail = NULL;
 			struct dp_srng *rx_refill_buf_ring;
 			struct rx_desc_pool *rx_desc_pool;
 
@@ -1990,13 +1988,11 @@ int dp_process_lmac_rings(struct dp_intr *int_ctx, int total_budget)
 			intr_stats->num_host2rxdma_ring_masks++;
 
 			if (!rx_refill_lt_disable)
-				dp_rx_buffers_lt_replenish_simple(soc,
-							  mac_for_pdev,
-							  rx_refill_buf_ring,
-							  rx_desc_pool,
-							  0,
-							  &desc_list,
-							  &tail);
+				dp_rx_buffers_lt_replenish_simple
+							(soc, mac_for_pdev,
+							 rx_refill_buf_ring,
+							 rx_desc_pool,
+							 false);
 		}
 	}
 
@@ -11936,6 +11932,7 @@ static QDF_STATUS dp_umac_reset_handle_post_reset_complete(struct dp_soc *soc)
 {
 	QDF_STATUS status;
 	qdf_nbuf_t nbuf_list = soc->umac_reset_ctx.nbuf_list;
+	uint8_t mac_id;
 
 	soc->umac_reset_ctx.nbuf_list = NULL;
 
@@ -11959,6 +11956,19 @@ static QDF_STATUS dp_umac_reset_handle_post_reset_complete(struct dp_soc *soc)
 		nbuf_list = nbuf;
 	}
 
+	/*
+	 * at pre-reset if in_use descriptors are not sufficient we replenish
+	 * only 1/3 of the ring. Try to replenish full ring here.
+	 */
+	for (mac_id = 0; mac_id < MAX_PDEV_CNT; mac_id++) {
+		struct dp_srng *dp_rxdma_srng =
+					&soc->rx_refill_buf_ring[mac_id];
+		struct rx_desc_pool *rx_desc_pool = &soc->rx_desc_buf[mac_id];
+
+		dp_rx_buffers_lt_replenish_simple(soc, mac_id, dp_rxdma_srng,
+						  rx_desc_pool, true);
+	}
+
 	dp_umac_reset_info("Umac reset done on soc %pK\n trigger start : %u us "
 			   "trigger done : %u us prereset : %u us\n"
 			   "postreset : %u us \n postreset complete: %u us \n",

dp/wifi3.0/dp_rx.c

@@ -385,7 +385,8 @@ dp_pdev_nbuf_alloc_and_map_replenish(struct dp_soc *dp_soc,
 QDF_STATUS
 __dp_rx_buffers_no_map_lt_replenish(struct dp_soc *soc, uint32_t mac_id,
 				    struct dp_srng *dp_rxdma_srng,
-				    struct rx_desc_pool *rx_desc_pool)
+				    struct rx_desc_pool *rx_desc_pool,
+				    bool force_replenish)
 {
 	struct dp_pdev *dp_pdev = dp_get_pdev_for_lmac_id(soc, mac_id);
 	uint32_t count;
@@ -421,8 +422,8 @@ __dp_rx_buffers_no_map_lt_replenish(struct dp_soc *soc, uint32_t mac_id,
 	dp_rx_debug("%pK: no of available entries in rxdma ring: %d",
 		    soc, num_entries_avail);
 
-	if (qdf_unlikely(num_entries_avail <
-			 ((dp_rxdma_srng->num_entries * 3) / 4))) {
+	if (qdf_unlikely(!force_replenish && (num_entries_avail <
+			 ((dp_rxdma_srng->num_entries * 3) / 4)))) {
 		hal_srng_access_end(soc->hal_soc, rxdma_srng);
 		return QDF_STATUS_E_FAILURE;
 	}
@@ -915,7 +916,8 @@ QDF_STATUS __dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
 				uint32_t num_req_buffers,
 				union dp_rx_desc_list_elem_t **desc_list,
 				union dp_rx_desc_list_elem_t **tail,
-				bool req_only, const char *func_name)
+				bool req_only, bool force_replenish,
+				const char *func_name)
 {
 	uint32_t num_alloc_desc;
 	uint16_t num_desc_to_free = 0;
@@ -959,8 +961,9 @@ QDF_STATUS __dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
 	dp_verbose_debug("%pK: no of available entries in rxdma ring: %d",
 			 dp_soc, num_entries_avail);
 
-	if (!req_only && !(*desc_list) && (num_entries_avail >
-		((dp_rxdma_srng->num_entries * 3) / 4))) {
+	if (!req_only && !(*desc_list) &&
+	    (force_replenish || (num_entries_avail >
+	     ((dp_rxdma_srng->num_entries * 3) / 4)))) {
 		num_req_buffers = num_entries_avail;
 		DP_STATS_INC(dp_pdev, replenish.low_thresh_intrs, 1);
 	} else if (num_entries_avail < num_req_buffers) {

dp/wifi3.0/dp_rx.h

@@ -219,7 +219,7 @@ struct dp_rx_desc {
 				num_buffers, desc_list, tail, req_only) \
 	__dp_rx_buffers_replenish(soc, mac_id, rxdma_srng, rx_desc_pool, \
 				  num_buffers, desc_list, tail, req_only, \
-				  __func__)
+				  false, __func__)
 
 #ifdef WLAN_SUPPORT_RX_FISA
 /**
@@ -1675,6 +1675,9 @@ dp_rx_update_flow_tag(struct dp_soc *soc, struct dp_vdev *vdev,
  *	       interrupt.
  * @tail: tail of descs list
  * @req_only: If true don't replenish more than req buffers
+ * @force_replenish: replenish full ring without limit check this
+ *                   this field will be considered only when desc_list
+ *                   is NULL and req_only is false
  * @func_name: name of the caller function
  *
  * Return: return success or failure
@@ -1686,6 +1689,7 @@ QDF_STATUS __dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
 				 union dp_rx_desc_list_elem_t **desc_list,
 				 union dp_rx_desc_list_elem_t **tail,
 				 bool req_only,
+				 bool force_replenish,
 				 const char *func_name);
 
 /**
@@ -1754,13 +1758,15 @@ __dp_rx_comp2refill_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
  * @mac_id: mac_id which is one of 3 mac_ids
  * @dp_rxdma_srng: dp rxdma circular ring
  * @rx_desc_pool: Pointer to free Rx descriptor pool
+ * @force_replenish: Force replenish the ring fully
  *
  * Return: return success or failure
  */
 QDF_STATUS
 __dp_rx_buffers_no_map_lt_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
 				    struct dp_srng *dp_rxdma_srng,
-				    struct rx_desc_pool *rx_desc_pool);
+				    struct rx_desc_pool *rx_desc_pool,
+				    bool force_replenish);
 
 /**
  * __dp_pdev_rx_buffers_no_map_attach() - replenish rxdma ring with rx nbufs
@@ -2585,12 +2591,11 @@ static inline
 void dp_rx_buffers_lt_replenish_simple(struct dp_soc *soc, uint32_t mac_id,
 				       struct dp_srng *rxdma_srng,
 				       struct rx_desc_pool *rx_desc_pool,
-				       uint32_t num_req_buffers,
-				       union dp_rx_desc_list_elem_t **desc_list,
-				       union dp_rx_desc_list_elem_t **tail)
+				       bool force_replenish)
 {
 	__dp_rx_buffers_no_map_lt_replenish(soc, mac_id, rxdma_srng,
-					    rx_desc_pool);
+					    rx_desc_pool,
+					    force_replenish);
 }
 
 #ifndef QCA_DP_NBUF_FAST_RECYCLE_CHECK
@@ -2727,12 +2732,11 @@ static inline
 void dp_rx_buffers_lt_replenish_simple(struct dp_soc *soc, uint32_t mac_id,
 				       struct dp_srng *rxdma_srng,
 				       struct rx_desc_pool *rx_desc_pool,
-				       uint32_t num_req_buffers,
-				       union dp_rx_desc_list_elem_t **desc_list,
-				       union dp_rx_desc_list_elem_t **tail)
+				       bool force_replenish)
 {
-	dp_rx_buffers_replenish(soc, mac_id, rxdma_srng, rx_desc_pool,
-				num_req_buffers, desc_list, tail, false);
+	__dp_rx_buffers_replenish(soc, mac_id, rxdma_srng, rx_desc_pool,
+				  0, NULL, NULL, false, force_replenish,
+				  __func__);
 }
 
 static inline