qcacmn: Allocate pdev attach bufs from page frag

Use page frag init time rx buffer allocation for efficient usage of memory.
Add ini dp_bufs_page_frag_allocs to disable and revert to original slab
nbuf allocations.

Change-Id: Iac78895addfe9da0118bc071c691a26216d6fda1
CRs-Fixed: 3553800

dp/wifi3.0/dp_rx.c

@@ -2981,14 +2981,23 @@ static QDF_STATUS
 dp_pdev_nbuf_alloc_and_map(struct dp_soc *dp_soc,
 			   struct dp_rx_nbuf_frag_info *nbuf_frag_info_t,
 			   struct dp_pdev *dp_pdev,
-			   struct rx_desc_pool *rx_desc_pool)
+			   struct rx_desc_pool *rx_desc_pool,
+			   bool dp_buf_page_frag_alloc_enable)
 {
 	QDF_STATUS ret = QDF_STATUS_E_FAILURE;
 
+	if (dp_buf_page_frag_alloc_enable) {
+		(nbuf_frag_info_t->virt_addr).nbuf =
+			qdf_nbuf_frag_alloc(dp_soc->osdev,
+					    rx_desc_pool->buf_size,
+					    RX_BUFFER_RESERVATION,
+					    rx_desc_pool->buf_alignment, FALSE);
+	} else	{
 		(nbuf_frag_info_t->virt_addr).nbuf =
 			qdf_nbuf_alloc(dp_soc->osdev, rx_desc_pool->buf_size,
 				       RX_BUFFER_RESERVATION,
 				       rx_desc_pool->buf_alignment, FALSE);
+	}
 	if (!((nbuf_frag_info_t->virt_addr).nbuf)) {
 		dp_err("nbuf alloc failed");
 		DP_STATS_INC(dp_pdev, replenish.nbuf_alloc_fail, 1);
@@ -3043,6 +3052,7 @@ dp_pdev_rx_buffers_attach(struct dp_soc *dp_soc, uint32_t mac_id,
 	union dp_rx_desc_list_elem_t *tail = NULL;
 	int sync_hw_ptr = 1;
 	uint32_t num_entries_avail;
+	bool dp_buf_page_frag_alloc_enable;
 
 	if (qdf_unlikely(!dp_pdev)) {
 		dp_rx_err("%pK: pdev is null for mac_id = %d",
@@ -3050,6 +3060,9 @@ dp_pdev_rx_buffers_attach(struct dp_soc *dp_soc, uint32_t mac_id,
 		return QDF_STATUS_E_FAILURE;
 	}
 
+	dp_buf_page_frag_alloc_enable =
+	       wlan_cfg_is_dp_buf_page_frag_alloc_enable(dp_soc->wlan_cfg_ctx);
+
 	if (qdf_unlikely(!rxdma_srng)) {
 		DP_STATS_INC(dp_pdev, replenish.rxdma_err, num_req_buffers);
 		return QDF_STATUS_E_FAILURE;
@@ -3125,7 +3138,8 @@ dp_pdev_rx_buffers_attach(struct dp_soc *dp_soc, uint32_t mac_id,
 			else
 				ret = dp_pdev_nbuf_alloc_and_map(dp_soc,
 						&nf_info[nr_nbuf], dp_pdev,
-						rx_desc_pool);
+						rx_desc_pool,
+						dp_buf_page_frag_alloc_enable);
 			if (QDF_IS_STATUS_ERROR(ret))
 				break;
 

wlan_cfg/cfg_dp.h

@@ -1522,6 +1522,10 @@
 	CFG_INI_BOOL("dp_rx_refill_buff_pool", false, \
 		     "Enable/Disable DP RX refill buffer pool support")
 
+#define CFG_DP_BUFS_PAGE_FRAG_ALLOCS \
+	CFG_INI_BOOL("dp_bufs_page_frag_allocs", true, \
+		     "Enable/Disable forced DP page frage buffer allocations")
+
 #define CFG_DP_POLL_MODE_ENABLE \
 		CFG_INI_BOOL("dp_poll_mode_enable", false, \
 		"Enable/Disable Polling mode for data path")
@@ -2049,6 +2053,7 @@
 		CFG(CFG_DP_PEER_LINK_STATS) \
 		CFG(CFG_DP_RX_BUFF_POOL_ENABLE) \
 		CFG(CFG_DP_RX_REFILL_BUFF_POOL_ENABLE) \
+		CFG(CFG_DP_BUFS_PAGE_FRAG_ALLOCS) \
 		CFG(CFG_DP_RX_PENDING_HL_THRESHOLD) \
 		CFG(CFG_DP_RX_PENDING_LO_THRESHOLD) \
 		CFG(CFG_DP_LEGACY_MODE_CSUM_DISABLE) \

wlan_cfg/wlan_cfg.c

@@ -4117,6 +4117,8 @@ wlan_cfg_soc_attach(struct cdp_ctrl_objmgr_psoc *psoc)
 			cfg_get(psoc, CFG_DP_RX_BUFF_POOL_ENABLE);
 	wlan_cfg_ctx->is_rx_refill_buff_pool_enabled =
 			cfg_get(psoc, CFG_DP_RX_REFILL_BUFF_POOL_ENABLE);
+	wlan_cfg_ctx->enable_dp_buf_page_frag_alloc =
+			cfg_get(psoc, CFG_DP_BUFS_PAGE_FRAG_ALLOCS);
 	wlan_cfg_ctx->rx_pending_high_threshold =
 			cfg_get(psoc, CFG_DP_RX_PENDING_HL_THRESHOLD);
 	wlan_cfg_ctx->rx_pending_low_threshold =
@@ -4342,6 +4344,8 @@ wlan_cfg_soc_attach(struct cdp_ctrl_objmgr_psoc *psoc)
 			cfg_get(psoc, CFG_DP_RX_BUFF_POOL_ENABLE);
 	wlan_cfg_ctx->is_rx_refill_buff_pool_enabled =
 			cfg_get(psoc, CFG_DP_RX_REFILL_BUFF_POOL_ENABLE);
+	wlan_cfg_ctx->enable_dp_buf_page_frag_alloc =
+			cfg_get(psoc, CFG_DP_BUFS_PAGE_FRAG_ALLOCS);
 #ifdef WLAN_FEATURE_RX_PREALLOC_BUFFER_POOL
 	wlan_cfg_ctx->rx_refill_buff_pool_size =
 		DP_RX_REFILL_BUFF_POOL_SIZE;
@@ -5480,6 +5484,11 @@ bool wlan_cfg_is_peer_link_stats_enabled(struct wlan_cfg_dp_soc_ctxt *cfg)
 
 qdf_export_symbol(wlan_cfg_is_peer_link_stats_enabled);
 
+bool wlan_cfg_is_dp_buf_page_frag_alloc_enable(struct wlan_cfg_dp_soc_ctxt *cfg)
+{
+	return cfg->enable_dp_buf_page_frag_alloc;
+}
+
 #ifdef WLAN_FEATURE_RX_PREALLOC_BUFFER_POOL
 bool wlan_cfg_is_rx_buffer_pool_enabled(struct wlan_cfg_dp_soc_ctxt *cfg)
 {

wlan_cfg/wlan_cfg.h

@@ -289,6 +289,8 @@ struct wlan_srng_cfg {
  *                           pool support
  * @is_rx_refill_buff_pool_enabled: flag to enable/disable RX refill buffer
  *                           pool support
+ * @enable_dp_buf_page_frag_alloc: Flag to control DP allocation from page frag
+ *				   cache.
  * @rx_refill_buff_pool_size: RX refill buffer pool size
  * @rx_pending_high_threshold: threshold of starting pkt drop
  * @rx_pending_low_threshold: threshold of stopping pkt drop
@@ -477,6 +479,7 @@ struct wlan_cfg_dp_soc_ctxt {
 	bool pext_stats_enabled;
 	bool is_rx_buff_pool_enabled;
 	bool is_rx_refill_buff_pool_enabled;
+	bool enable_dp_buf_page_frag_alloc;
 	int rx_refill_buff_pool_size;
 	uint32_t rx_pending_high_threshold;
 	uint32_t rx_pending_low_threshold;
@@ -2001,6 +2004,18 @@ bool wlan_cfg_is_rx_buffer_pool_enabled(struct wlan_cfg_dp_soc_ctxt *cfg);
  */
 bool wlan_cfg_is_rx_refill_buffer_pool_enabled(struct wlan_cfg_dp_soc_ctxt *cfg);
 
+/**
+ * wlan_cfg_is_dp_buf_page_frag_alloc_enable() - Get nbuf allocations from page
+ *						 frags.
+ *
+ * @cfg: soc configuration context
+ *
+ * Return: true if enabled, false otherwise.
+ */
+
+bool
+wlan_cfg_is_dp_buf_page_frag_alloc_enable(struct wlan_cfg_dp_soc_ctxt *cfg);
+
 #ifdef WLAN_FEATURE_RX_PREALLOC_BUFFER_POOL
 /**
  * wlan_cfg_get_rx_refill_buf_pool_size() - Get Rx refill buf pool size