qcacmn: Split dp_rx_pdev_attach and dp_rx_pdev_detach

Split dp_rx_pdev_attach into dp_rx_pdev_desc_pool_alloc,
dp_rx_pdev_desc_pool_init, dp_rx_pdev_buffers_alloc and
dp_rx_pdev_detach into dp_rx_pdev_desc_pool_free, dp_rx
_pdev_desc_pool_deinit, dp_rx_pdev_buffers_free APIs

This split is made because dp_pdev_init is introduced
as part of this FR and these APIs will be called from
dp_pdev_init/dp_pdev_deinit or dp_pdev_attach/dp_pdev_
detach accordingly to maintain the symmetry to DP init
and deinit path

Change-Id: Ib543ddae90b90f4706004080b1f2b7d0e5cfbfbc
CRs-Fixed: 2663595

dp/wifi3.0/dp_main.c

@@ -4544,7 +4544,8 @@ static void dp_pdev_deinit(struct cdp_pdev *txrx_pdev, int force)
 	dp_pktlogmod_exit(pdev);
 
 	dp_rx_fst_detach(soc, pdev);
-	dp_rx_pdev_detach(pdev);
+	dp_rx_pdev_buffers_free(pdev);
+	dp_rx_pdev_desc_pool_deinit(pdev);
 	dp_rx_pdev_mon_detach(pdev);
 	dp_neighbour_peers_detach(pdev);
 	qdf_spinlock_destroy(&pdev->tx_mutex);
@@ -4652,7 +4653,7 @@ static void dp_pdev_detach(struct cdp_pdev *txrx_pdev, int force)
 	struct dp_pdev *pdev = (struct dp_pdev *)txrx_pdev;
 	struct dp_soc *soc = pdev->soc;
 	struct rx_desc_pool *rx_desc_pool;
-	int mac_id, mac_for_pdev;
+	int mac_id;
 	int lmac_id;
 
 	if (wlan_cfg_per_pdev_tx_ring(soc->wlan_cfg_ctx)) {
@@ -4668,6 +4669,7 @@ static void dp_pdev_detach(struct cdp_pdev *txrx_pdev, int force)
 
 	dp_mon_link_free(pdev);
 
+	dp_rx_pdev_detach(pdev);
 	/* Cleanup per PDEV REO rings if configured */
 	if (wlan_cfg_per_pdev_rx_ring(soc->wlan_cfg_ctx)) {
 		wlan_minidump_remove(
@@ -4691,21 +4693,13 @@ static void dp_pdev_detach(struct cdp_pdev *txrx_pdev, int force)
 				RXDMA_DST, 0);
 
 		if (dp_is_soc_reinit(soc)) {
-			mac_for_pdev =
-				dp_get_lmac_id_for_pdev_id(soc, mac_id,
-							   pdev->pdev_id);
-			rx_desc_pool = &soc->rx_desc_status[mac_for_pdev];
+			rx_desc_pool = &soc->rx_desc_status[lmac_id];
 			dp_rx_desc_pool_free(soc, rx_desc_pool);
-			rx_desc_pool = &soc->rx_desc_mon[mac_for_pdev];
+			rx_desc_pool = &soc->rx_desc_mon[lmac_id];
 			dp_rx_desc_pool_free(soc, rx_desc_pool);
 		}
 	}
 
-	if (dp_is_soc_reinit(soc)) {
-		rx_desc_pool = &soc->rx_desc_buf[pdev->lmac_id];
-		dp_rx_desc_pool_free(soc, rx_desc_pool);
-	}
-
 	/* only do soc common cleanup when last pdev do detach */
 	if (!(soc->pdev_count))
 		dp_soc_cmn_cleanup(soc);

dp/wifi3.0/dp_rx.c

@@ -2468,21 +2468,7 @@ QDF_STATUS dp_rx_vdev_detach(struct dp_vdev *vdev)
 void
 dp_rx_pdev_detach(struct dp_pdev *pdev)
 {
-	uint8_t mac_for_pdev = pdev->lmac_id;
-	struct dp_soc *soc = pdev->soc;
-	struct rx_desc_pool *rx_desc_pool;
-
-	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
-
-	if (rx_desc_pool->pool_size != 0) {
-		if (!dp_is_soc_reinit(soc))
-			dp_rx_desc_nbuf_and_pool_free(soc, mac_for_pdev,
-						      rx_desc_pool);
-		else
-			dp_rx_desc_nbuf_free(soc, rx_desc_pool);
-	}
-
-	return;
+	dp_rx_pdev_desc_pool_free(pdev);
 }
 
 static QDF_STATUS
@@ -2655,69 +2641,214 @@ dp_pdev_rx_buffers_attach(struct dp_soc *dp_soc, uint32_t mac_id,
 	return QDF_STATUS_SUCCESS;
 }
 
-/**
- * dp_rx_attach() - attach DP RX
- * @pdev: core txrx pdev context
+/*
+ * dp_rx_pdev_desc_pool_alloc() -  allocate memory for software rx descriptor
+ *				   pool
  *
- * This function will attach a DP RX instance into the main
- * device (SOC) context. Will allocate dp rx resource and
- * initialize resources.
+ * @pdev: core txrx pdev context
  *
- * Return: QDF_STATUS_SUCCESS: success
- *         QDF_STATUS_E_RESOURCES: Error return
+ * Return: QDF_STATUS - QDF_STATUS_SUCCESS
+ *			QDF_STATUS_E_NOMEM
  */
 QDF_STATUS
-dp_rx_pdev_attach(struct dp_pdev *pdev)
+dp_rx_pdev_desc_pool_alloc(struct dp_pdev *pdev)
 {
-	uint8_t pdev_id = pdev->pdev_id;
 	struct dp_soc *soc = pdev->soc;
 	uint32_t rxdma_entries;
 	uint32_t rx_sw_desc_weight;
 	struct dp_srng *dp_rxdma_srng;
 	struct rx_desc_pool *rx_desc_pool;
-	QDF_STATUS ret_val;
+	uint32_t status = QDF_STATUS_SUCCESS;
 	int mac_for_pdev;
 
+	mac_for_pdev = pdev->lmac_id;
 	if (wlan_cfg_get_dp_pdev_nss_enabled(pdev->wlan_cfg_ctx)) {
 		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO,
-			  "nss-wifi<4> skip Rx refil %d", pdev_id);
-		return QDF_STATUS_SUCCESS;
+			  "nss-wifi<4> skip Rx refil %d", mac_for_pdev);
+		status = QDF_STATUS_SUCCESS;
 	}
 
-	pdev = soc->pdev_list[pdev_id];
-	mac_for_pdev = pdev->lmac_id;
 	dp_rxdma_srng = &soc->rx_refill_buf_ring[mac_for_pdev];
-
 	rxdma_entries = dp_rxdma_srng->num_entries;
 
-	soc->process_rx_status = CONFIG_PROCESS_RX_STATUS;
-
 	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
 	rx_sw_desc_weight = wlan_cfg_get_dp_soc_rx_sw_desc_weight(soc->wlan_cfg_ctx);
 
-	dp_rx_desc_pool_alloc(soc, mac_for_pdev,
-			      rx_sw_desc_weight * rxdma_entries,
-			      rx_desc_pool);
+	status = dp_rx_desc_pool_alloc(soc,
+				       rx_sw_desc_weight * rxdma_entries,
+				       rx_desc_pool);
+	if (status != QDF_STATUS_SUCCESS)
+		return status;
 
 	rx_desc_pool->owner = DP_WBM2SW_RBM;
 	rx_desc_pool->buf_size = RX_DATA_BUFFER_SIZE;
 	rx_desc_pool->buf_alignment = RX_DATA_BUFFER_ALIGNMENT;
 
-	/* For Rx buffers, WBM release ring is SW RING 3,for all pdev's */
+	return status;
+}
+
+/*
+ * dp_rx_pdev_desc_pool_free() - free software rx descriptor pool
+ *
+ * @pdev: core txrx pdev context
+ */
+void dp_rx_pdev_desc_pool_free(struct dp_pdev *pdev)
+{
+	int mac_for_pdev = pdev->lmac_id;
+	struct dp_soc *soc = pdev->soc;
+	struct rx_desc_pool *rx_desc_pool;
+
+	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
+
+	dp_rx_desc_pool_free(soc, rx_desc_pool);
+}
+
+/*
+ * dp_rx_pdev_desc_pool_init() - initialize software rx descriptors
+ *
+ * @pdev: core txrx pdev context
+ *
+ * Return: QDF_STATUS - QDF_STATUS_SUCCESS
+ *			QDF_STATUS_E_NOMEM
+ */
+QDF_STATUS dp_rx_pdev_desc_pool_init(struct dp_pdev *pdev)
+{
+	int mac_for_pdev = pdev->lmac_id;
+	struct dp_soc *soc = pdev->soc;
+	uint32_t rxdma_entries;
+	uint32_t rx_sw_desc_weight;
+	struct dp_srng *dp_rxdma_srng;
+	struct rx_desc_pool *rx_desc_pool;
+
+	if (wlan_cfg_get_dp_pdev_nss_enabled(pdev->wlan_cfg_ctx)) {
+		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO,
+			  "nss-wifi<4> skip Rx refil %d", mac_for_pdev);
+		return QDF_STATUS_SUCCESS;
+	}
+
+	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
+	if (dp_rx_desc_pool_is_allocated(rx_desc_pool) == QDF_STATUS_E_NOMEM)
+		return QDF_STATUS_E_NOMEM;
+
+	dp_rxdma_srng = &soc->rx_refill_buf_ring[mac_for_pdev];
+	rxdma_entries = dp_rxdma_srng->num_entries;
+
+	soc->process_rx_status = CONFIG_PROCESS_RX_STATUS;
+
+	rx_sw_desc_weight =
+	wlan_cfg_get_dp_soc_rx_sw_desc_weight(soc->wlan_cfg_ctx);
+
+	dp_rx_desc_pool_init(soc, mac_for_pdev,
+			     rx_sw_desc_weight * rxdma_entries,
+			     rx_desc_pool);
+	return QDF_STATUS_SUCCESS;
+}
+
+/*
+ * dp_rx_pdev_desc_pool_deinit() - de-initialize software rx descriptor pools
+ * @pdev: core txrx pdev context
+ *
+ * This function resets the freelist of rx descriptors and destroys locks
+ * associated with this list of descriptors.
+ */
+void dp_rx_pdev_desc_pool_deinit(struct dp_pdev *pdev)
+{
+	int mac_for_pdev = pdev->lmac_id;
+	struct dp_soc *soc = pdev->soc;
+	struct rx_desc_pool *rx_desc_pool;
+
+	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
+
+	dp_rx_desc_pool_deinit(soc, rx_desc_pool);
+}
+
+/**
+ * dp_rx_attach() - attach DP RX
+ * @pdev: core txrx pdev context
+ *
+ * This function will attach a DP RX instance into the main
+ * device (SOC) context. Will allocate dp rx resource and
+ * initialize resources.
+ *
+ * Return: QDF_STATUS_SUCCESS: success
+ *         QDF_STATUS_E_RESOURCES: Error return
+ */
+QDF_STATUS
+dp_rx_pdev_attach(struct dp_pdev *pdev)
+{
+	struct dp_soc *soc = pdev->soc;
+	QDF_STATUS ret_val;
+
+	if (wlan_cfg_get_dp_pdev_nss_enabled(pdev->wlan_cfg_ctx)) {
+		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO,
+			  "nss-wifi<4> skip Rx refil %d",
+			  pdev->pdev_id);
+		return QDF_STATUS_SUCCESS;
+	}
+
+	if (!dp_is_soc_reinit(soc)) {
+		ret_val = dp_rx_pdev_desc_pool_alloc(pdev);
+		if (ret_val != QDF_STATUS_SUCCESS)
+			return ret_val;
+	}
+
+	dp_rx_pdev_desc_pool_init(pdev);
 
 	ret_val = dp_rx_fst_attach(soc, pdev);
 	if ((ret_val != QDF_STATUS_SUCCESS) &&
 	    (ret_val != QDF_STATUS_E_NOSUPPORT)) {
 		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
 			  "RX Flow Search Table attach failed: pdev %d err %d",
-			  pdev_id, ret_val);
+			  pdev->pdev_id, ret_val);
 		return ret_val;
 	}
 
+	return dp_rx_pdev_buffers_alloc(pdev);
+}
+
+/*
+ * dp_rx_pdev_buffers_alloc() - Allocate nbufs (skbs) and replenish RxDMA ring
+ *
+ * @pdev: core txrx pdev context
+ *
+ * Return: QDF_STATUS - QDF_STATUS_SUCCESS
+ *			QDF_STATUS_E_NOMEM
+ */
+QDF_STATUS
+dp_rx_pdev_buffers_alloc(struct dp_pdev *pdev)
+{
+	int mac_for_pdev = pdev->lmac_id;
+	struct dp_soc *soc = pdev->soc;
+	struct dp_srng *dp_rxdma_srng;
+	struct rx_desc_pool *rx_desc_pool;
+	uint32_t rxdma_entries;
+
+	dp_rxdma_srng = &soc->rx_refill_buf_ring[mac_for_pdev];
+	rxdma_entries = dp_rxdma_srng->num_entries;
+
+	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
+
 	return dp_pdev_rx_buffers_attach(soc, mac_for_pdev, dp_rxdma_srng,
 					 rx_desc_pool, rxdma_entries - 1);
 }
 
+/*
+ * dp_rx_pdev_buffers_free - Free nbufs (skbs)
+ *
+ * @pdev: core txrx pdev context
+ */
+void
+dp_rx_pdev_buffers_free(struct dp_pdev *pdev)
+{
+	int mac_for_pdev = pdev->lmac_id;
+	struct dp_soc *soc = pdev->soc;
+	struct rx_desc_pool *rx_desc_pool;
+
+	rx_desc_pool = &soc->rx_desc_buf[mac_for_pdev];
+
+	dp_rx_desc_nbuf_free(soc, rx_desc_pool);
+}
+
 /*
  * dp_rx_nbuf_prepare() - prepare RX nbuf
  * @soc: core txrx main context

dp/wifi3.0/dp_rx.h

@@ -431,6 +431,11 @@ struct dp_rx_desc *dp_rx_cookie_2_va_mon_status(struct dp_soc *soc,
 	return dp_get_rx_desc_from_cookie(soc, &soc->rx_desc_status[0], cookie);
 }
 #else
+
+void dp_rx_desc_pool_init(struct dp_soc *soc, uint32_t pool_id,
+			  uint32_t pool_size,
+			  struct rx_desc_pool *rx_desc_pool);
+
 /**
  * dp_rx_cookie_2_va_rxdma_buf() - Converts cookie to a virtual address of
  *			 the Rx descriptor on Rx DMA source ring buffer
@@ -494,6 +499,15 @@ void *dp_rx_cookie_2_va_mon_status(struct dp_soc *soc, uint32_t cookie)
 }
 #endif /* RX_DESC_MULTI_PAGE_ALLOC */
 
+QDF_STATUS dp_rx_desc_pool_is_allocated(struct rx_desc_pool *rx_desc_pool);
+QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc,
+				 uint32_t pool_size,
+				 struct rx_desc_pool *rx_desc_pool);
+
+void dp_rx_desc_pool_init(struct dp_soc *soc, uint32_t pool_id,
+			  uint32_t pool_size,
+			  struct rx_desc_pool *rx_desc_pool);
+
 void dp_rx_add_desc_list_to_free_list(struct dp_soc *soc,
 				union dp_rx_desc_list_elem_t **local_desc_list,
 				union dp_rx_desc_list_elem_t **tail,
@@ -507,7 +521,17 @@ uint16_t dp_rx_get_free_desc_list(struct dp_soc *soc, uint32_t pool_id,
 				union dp_rx_desc_list_elem_t **tail);
 
 
+QDF_STATUS dp_rx_pdev_desc_pool_alloc(struct dp_pdev *pdev);
+void dp_rx_pdev_desc_pool_free(struct dp_pdev *pdev);
+
+QDF_STATUS dp_rx_pdev_desc_pool_init(struct dp_pdev *pdev);
+void dp_rx_pdev_desc_pool_deinit(struct dp_pdev *pdev);
+void dp_rx_desc_pool_deinit(struct dp_soc *soc,
+			    struct rx_desc_pool *rx_desc_pool);
+
 QDF_STATUS dp_rx_pdev_attach(struct dp_pdev *pdev);
+QDF_STATUS dp_rx_pdev_buffers_alloc(struct dp_pdev *pdev);
+void dp_rx_pdev_buffers_free(struct dp_pdev *pdev);
 
 void dp_rx_pdev_detach(struct dp_pdev *pdev);
 
@@ -570,19 +594,6 @@ dp_rx_wbm_err_process(struct dp_intr *int_ctx, struct dp_soc *soc,
  */
 qdf_nbuf_t dp_rx_sg_create(qdf_nbuf_t nbuf);
 
-/*
- * dp_rx_desc_pool_alloc() - create a pool of software rx_descs
- *			     at the time of dp rx initialization
- *
- * @soc: core txrx main context
- * @pool_id: pool_id which is one of 3 mac_ids
- * @pool_size: number of Rx descriptor in the pool
- * @rx_desc_pool: rx descriptor pool pointer
- *
- * Return: QDF status
- */
-QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
-				 uint32_t pool_size, struct rx_desc_pool *pool);
 
 /*
  * dp_rx_desc_nbuf_and_pool_free() - free the sw rx desc pool called during

dp/wifi3.0/dp_rx_desc.c

@@ -25,29 +25,54 @@ A_COMPILE_TIME_ASSERT(cookie_size_check,
 		      PAGE_SIZE / sizeof(union dp_rx_desc_list_elem_t) <=
 		      1 << DP_RX_DESC_PAGE_ID_SHIFT);
 
-QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
+/*
+ * dp_rx_desc_pool_is_allocated() - check if memory is allocated for the
+ *					rx descriptor pool
+ *
+ * @rx_desc_pool: rx descriptor pool pointer
+ * Return: QDF_STATUS  QDF_STATUS_SUCCESS
+ *			QDF_STATUS_E_NOMEM
+ */
+QDF_STATUS dp_rx_desc_pool_is_allocated(struct rx_desc_pool *rx_desc_pool)
+{
+	if (!rx_desc_pool->desc_pages.num_pages) {
+		dp_err("Multi page alloc fail, size=%d, elem=%d",
+		       rx_desc_pool->elem_size, rx_desc_pool->pool_size);
+		return QDF_STATUS_E_NOMEM;
+	}
+	return QDF_STATUS_SUCCESS;
+}
+
+/*
+ * dp_rx_desc_pool_alloc() - Allocate a memory pool for software rx
+ *			     descriptors
+ *
+ * @soc: core txrx main context
+ * @num_elem: number of rx descriptors (size of the pool)
+ * @rx_desc_pool: rx descriptor pool pointer
+ *
+ * Return: QDF_STATUS  QDF_STATUS_SUCCESS
+ *		       QDF_STATUS_E_NOMEM
+ *		       QDF_STATUS_E_FAULT
+ */
+QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc,
 				 uint32_t num_elem,
 				 struct rx_desc_pool *rx_desc_pool)
 {
-	uint32_t id, page_id, offset, desc_size, num_desc_per_page;
-	uint32_t count = 0;
+	uint32_t desc_size;
 	union dp_rx_desc_list_elem_t *rx_desc_elem;
 
 	desc_size = sizeof(*rx_desc_elem);
 	rx_desc_pool->elem_size = desc_size;
-	if (!dp_is_soc_reinit(soc)) {
-		qdf_mem_multi_pages_alloc(soc->osdev, &rx_desc_pool->desc_pages,
-					  desc_size, num_elem, 0, true);
-		if (!rx_desc_pool->desc_pages.num_pages) {
-			qdf_err("Multi page alloc fail,size=%d, elem=%d",
-				desc_size, num_elem);
-			return QDF_STATUS_E_NOMEM;
-		}
+
+	qdf_mem_multi_pages_alloc(soc->osdev, &rx_desc_pool->desc_pages,
+				  desc_size, num_elem, 0, true);
+	if (!rx_desc_pool->desc_pages.num_pages) {
+		qdf_err("Multi page alloc fail,size=%d, elem=%d",
+			desc_size, num_elem);
+		return QDF_STATUS_E_NOMEM;
 	}
 
-	num_desc_per_page = rx_desc_pool->desc_pages.num_element_per_page;
-	rx_desc_pool->freelist = (union dp_rx_desc_list_elem_t *)
-				  *rx_desc_pool->desc_pages.cacheable_pages;
 	if (qdf_mem_multi_page_link(soc->osdev,
 				    &rx_desc_pool->desc_pages,
 				    desc_size, num_elem, true)) {
@@ -55,10 +80,41 @@ QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
 			desc_size, num_elem);
 		goto free_rx_desc_pool;
 	}
+	return QDF_STATUS_SUCCESS;
+
+free_rx_desc_pool:
+	dp_rx_desc_pool_free(soc, rx_desc_pool);
+
+	return QDF_STATUS_E_FAULT;
+}
+
+/*
+ * dp_rx_desc_pool_init() - Initialize the software RX descriptor pool
+ *			convert the pool of memory into a list of
+ *			rx descriptors and create locks to access this
+ *			list of rx descriptors.
+ *
+ * @soc: core txrx main context
+ * @pool_id: pool_id which is one of 3 mac_ids
+ * @pool_size: size of the rx descriptor pool
+ * @rx_desc_pool: rx descriptor pool pointer
+ */
+void dp_rx_desc_pool_init(struct dp_soc *soc, uint32_t pool_id,
+			  uint32_t pool_size, struct rx_desc_pool *rx_desc_pool)
+{
+	uint32_t id, page_id, offset, num_desc_per_page;
+	uint32_t count = 0;
+	union dp_rx_desc_list_elem_t *rx_desc_elem;
+
 	/* Initialize the lock */
 	qdf_spinlock_create(&rx_desc_pool->lock);
+
 	qdf_spin_lock_bh(&rx_desc_pool->lock);
-	rx_desc_pool->pool_size = num_elem;
+	rx_desc_pool->pool_size = pool_size;
+
+	num_desc_per_page = rx_desc_pool->desc_pages.num_element_per_page;
+	rx_desc_pool->freelist = (union dp_rx_desc_list_elem_t *)
+				  *rx_desc_pool->desc_pages.cacheable_pages;
 
 	rx_desc_elem = rx_desc_pool->freelist;
 	while (rx_desc_elem) {
@@ -82,12 +138,6 @@ QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
 		count++;
 	}
 	qdf_spin_unlock_bh(&rx_desc_pool->lock);
-	return QDF_STATUS_SUCCESS;
-
-free_rx_desc_pool:
-	dp_rx_desc_pool_free(soc, rx_desc_pool);
-
-	return QDF_STATUS_E_FAULT;
 }
 
 union dp_rx_desc_list_elem_t *dp_rx_desc_find(uint16_t page_id, uint16_t offset,
@@ -142,6 +192,7 @@ void dp_rx_desc_nbuf_and_pool_free(struct dp_soc *soc, uint32_t pool_id,
 	qdf_status = __dp_rx_desc_nbuf_free(soc, rx_desc_pool);
 	if (QDF_IS_STATUS_SUCCESS(qdf_status))
 		dp_rx_desc_pool_free(soc, rx_desc_pool);
+
 	qdf_spin_unlock_bh(&rx_desc_pool->lock);
 
 	qdf_spinlock_destroy(&rx_desc_pool->lock);
@@ -153,8 +204,6 @@ void dp_rx_desc_nbuf_free(struct dp_soc *soc,
 	qdf_spin_lock_bh(&rx_desc_pool->lock);
 	__dp_rx_desc_nbuf_free(soc, rx_desc_pool);
 	qdf_spin_unlock_bh(&rx_desc_pool->lock);
-
-	qdf_spinlock_destroy(&rx_desc_pool->lock);
 }
 
 void dp_rx_desc_pool_free(struct dp_soc *soc,
@@ -165,25 +214,78 @@ void dp_rx_desc_pool_free(struct dp_soc *soc,
 	qdf_mem_multi_pages_free(soc->osdev,
 				 &rx_desc_pool->desc_pages, 0, true);
 }
+
+void dp_rx_desc_pool_deinit(struct dp_soc *soc,
+			    struct rx_desc_pool *rx_desc_pool)
+{
+	qdf_spin_lock_bh(&rx_desc_pool->lock);
+
+	rx_desc_pool->freelist = NULL;
+	rx_desc_pool->pool_size = 0;
+	qdf_spin_unlock_bh(&rx_desc_pool->lock);
+	qdf_spinlock_destroy(&rx_desc_pool->lock);
+}
 #else
-QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
-	uint32_t pool_size, struct rx_desc_pool *rx_desc_pool)
+/*
+ * dp_rx_desc_pool_is_allocated() - check if memory is allocated for the
+ *					rx descriptor pool
+ *
+ * @rx_desc_pool: rx descriptor pool pointer
+ *
+ * Return: QDF_STATUS  QDF_STATUS_SUCCESS
+ *			QDF_STATUS_E_NOMEM
+ */
+QDF_STATUS dp_rx_desc_pool_is_allocated(struct rx_desc_pool *rx_desc_pool)
 {
-	uint32_t i;
-
-	if (!dp_is_soc_reinit(soc)) {
-		rx_desc_pool->array =
-		qdf_mem_malloc(pool_size *
-		sizeof(union dp_rx_desc_list_elem_t));
-
-		if (!(rx_desc_pool->array)) {
-			QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_FATAL,
-				  "%s: RX Desc Pool[%d] allocation failed",
-				  __func__, pool_id);
-			return QDF_STATUS_E_NOMEM;
-		}
+	if (!rx_desc_pool->array) {
+		dp_err("nss-wifi<4> skip Rx refil");
+		return QDF_STATUS_E_NOMEM;
 	}
+	return QDF_STATUS_SUCCESS;
+}
 
+/*
+ * dp_rx_desc_pool_alloc() - Allocate a memory pool for software rx
+ *			     descriptors
+ *
+ * @soc: core txrx main context
+ * @num_elem: number of rx descriptors (size of the pool)
+ * @rx_desc_pool: rx descriptor pool pointer
+ *
+ * Return: QDF_STATUS  QDF_STATUS_SUCCESS
+ *		       QDF_STATUS_E_NOMEM
+ *		       QDF_STATUS_E_FAULT
+ */
+QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc,
+				 uint32_t pool_size,
+				 struct rx_desc_pool *rx_desc_pool)
+{
+	rx_desc_pool->array = qdf_mem_malloc(pool_size *
+				     sizeof(union dp_rx_desc_list_elem_t));
+
+	if (!(rx_desc_pool->array)) {
+		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_FATAL,
+			  "%s: RX Desc Pool allocation failed");
+		return QDF_STATUS_E_NOMEM;
+	}
+	return QDF_STATUS_SUCCESS;
+}
+
+/*
+ * dp_rx_desc_pool_init() - Initialize the software RX descriptor pool
+ *			convert the pool of memory into a list of
+ *			rx descriptors and create locks to access this
+ *			list of rx descriptors.
+ *
+ * @soc: core txrx main context
+ * @pool_id: pool_id which is one of 3 mac_ids
+ * @pool_size: size of the rx descriptor pool
+ * @rx_desc_pool: rx descriptor pool pointer
+ */
+void dp_rx_desc_pool_init(struct dp_soc *soc, uint32_t pool_id,
+			  uint32_t pool_size, struct rx_desc_pool *rx_desc_pool)
+{
+	int i;
 	/* Initialize the lock */
 	qdf_spinlock_create(&rx_desc_pool->lock);
 
@@ -192,6 +294,7 @@ QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
 
 	/* link SW rx descs into a freelist */
 	rx_desc_pool->freelist = &rx_desc_pool->array[0];
+	qdf_mem_zero(rx_desc_pool->freelist, rx_desc_pool->pool_size);
 	for (i = 0; i <= rx_desc_pool->pool_size - 1; i++) {
 		if (i == rx_desc_pool->pool_size - 1)
 			rx_desc_pool->array[i].next = NULL;
@@ -204,7 +307,6 @@ QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
 	}
 
 	qdf_spin_unlock_bh(&rx_desc_pool->lock);
-	return QDF_STATUS_SUCCESS;
 }
 
 void dp_rx_desc_nbuf_and_pool_free(struct dp_soc *soc, uint32_t pool_id,
@@ -251,12 +353,10 @@ void dp_rx_desc_nbuf_free(struct dp_soc *soc,
 				qdf_nbuf_unmap_single(soc->osdev, nbuf,
 						      QDF_DMA_FROM_DEVICE);
 			}
-
 			qdf_nbuf_free(nbuf);
 		}
 	}
 	qdf_spin_unlock_bh(&rx_desc_pool->lock);
-	qdf_spinlock_destroy(&rx_desc_pool->lock);
 }
 
 void dp_rx_desc_pool_free(struct dp_soc *soc,
@@ -264,6 +364,18 @@ void dp_rx_desc_pool_free(struct dp_soc *soc,
 {
 	qdf_mem_free(rx_desc_pool->array);
 }
+
+void dp_rx_desc_pool_deinit(struct dp_soc *soc,
+			    struct rx_desc_pool *rx_desc_pool)
+{
+	qdf_spin_lock_bh(&rx_desc_pool->lock);
+
+	rx_desc_pool->freelist = NULL;
+	rx_desc_pool->pool_size = 0;
+	qdf_spin_unlock_bh(&rx_desc_pool->lock);
+	qdf_spinlock_destroy(&rx_desc_pool->lock);
+}
+
 #endif /* RX_DESC_MULTI_PAGE_ALLOC */
 /*
  * dp_rx_get_free_desc_list() - provide a list of descriptors from

dp/wifi3.0/dp_rx_mon_dest.c

@@ -1151,12 +1151,14 @@ dp_rx_pdev_mon_buf_attach(struct dp_pdev *pdev, int mac_id) {
 
 	dp_debug("Mon RX Desc Pool[%d] entries=%u",
 		 pdev_id, num_entries);
-
 	rx_desc_pool_size = wlan_cfg_get_dp_soc_rx_sw_desc_weight(soc->wlan_cfg_ctx) * num_entries;
-	status = dp_rx_desc_pool_alloc(soc, mac_id, rx_desc_pool_size,
-				       rx_desc_pool);
-	if (!QDF_IS_STATUS_SUCCESS(status))
-		return status;
+
+	if (!dp_is_soc_reinit(soc)) {
+		status = dp_rx_desc_pool_alloc(soc, rx_desc_pool_size,
+					       rx_desc_pool);
+		if (!QDF_IS_STATUS_SUCCESS(status))
+			return status;
+	}
 
 	rx_desc_pool->owner = HAL_RX_BUF_RBM_SW3_BM;
 	rx_desc_pool->buf_size = RX_MONITOR_BUFFER_SIZE;
@@ -1164,6 +1166,9 @@ dp_rx_pdev_mon_buf_attach(struct dp_pdev *pdev, int mac_id) {
 
 	replenish_size = ((num_entries - 1) < MON_BUF_MIN_ALLOC_ENTRIES) ?
 			  (num_entries - 1) : MON_BUF_MIN_ALLOC_ENTRIES;
+
+	dp_rx_desc_pool_init(soc, mac_id, rx_desc_pool_size, rx_desc_pool);
+
 	status = dp_pdev_rx_buffers_attach(soc, mac_id, mon_buf_ring,
 					   rx_desc_pool, replenish_size);
 

dp/wifi3.0/dp_rx_mon_status.c

@@ -2078,10 +2078,14 @@ dp_rx_pdev_mon_status_attach(struct dp_pdev *pdev, int ring_id) {
 	dp_info("Mon RX Status Pool[%d] entries=%d",
 		ring_id, num_entries);
 
-	status = dp_rx_desc_pool_alloc(soc, ring_id, num_entries + 1,
-				       rx_desc_pool);
-	if (!QDF_IS_STATUS_SUCCESS(status))
-		return status;
+	if (!dp_is_soc_reinit(soc)) {
+		status = dp_rx_desc_pool_alloc(soc, num_entries + 1,
+					       rx_desc_pool);
+		if (!QDF_IS_STATUS_SUCCESS(status))
+			return status;
+	}
+
+	dp_rx_desc_pool_init(soc, ring_id, num_entries + 1, rx_desc_pool);
 
 	rx_desc_pool->buf_size = RX_DATA_BUFFER_SIZE;
 	rx_desc_pool->buf_alignment = RX_DATA_BUFFER_ALIGNMENT;