ionic: convert Rx queue buffers to use page_pool

Our home-grown buffer management needs to go away and we need
to be playing nicely with the page_pool infrastructure.  This
converts the Rx traffic queues to use page_pool.

Also, since ionic_rx_buf_size() was removed, redefine
IONIC_PAGE_SIZE to account for IONIC_MAX_BUF_LEN being the
largest allowed buffer to prevent overflowing u16 variables,
which could happen when PAGE_SIZE is defined as >= 64KB.

include/linux/minmax.h:93:37: warning: conversion from 'long unsigned int' to 'u16' {aka 'short unsigned int'} changes value from '65536' to '0' [-Woverflow]

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Link: https://patch.msgid.link/20240906232623.39651-7-brett.creeley@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/pensando/Kconfig

@@ -23,6 +23,7 @@ config IONIC
 	depends on PTP_1588_CLOCK_OPTIONAL
 	select NET_DEVLINK
 	select DIMLIB
+	select PAGE_POOL
 	help
 	  This enables the support for the Pensando family of Ethernet
 	  adapters.  More specific information on this driver can be

drivers/net/ethernet/pensando/ionic/ionic_dev.h

@@ -181,10 +181,7 @@ struct ionic_queue;
 struct ionic_qcq;
 
 #define IONIC_MAX_BUF_LEN			((u16)-1)
-#define IONIC_PAGE_SIZE				PAGE_SIZE
+#define IONIC_PAGE_SIZE				MIN(PAGE_SIZE, IONIC_MAX_BUF_LEN)
-#define IONIC_PAGE_SPLIT_SZ			(PAGE_SIZE / 2)
-#define IONIC_PAGE_GFP_MASK			(GFP_ATOMIC | __GFP_NOWARN |\
-						 __GFP_COMP | __GFP_MEMALLOC)
 
 #define IONIC_XDP_MAX_LINEAR_MTU	(IONIC_PAGE_SIZE -	\
 					 (VLAN_ETH_HLEN +	\
@@ -248,11 +245,6 @@ struct ionic_queue {
 		struct ionic_rxq_desc *rxq;
 		struct ionic_admin_cmd *adminq;
 	};
-	union {
-		void __iomem *cmb_base;
-		struct ionic_txq_desc __iomem *cmb_txq;
-		struct ionic_rxq_desc __iomem *cmb_rxq;
-	};
 	union {
 		void *sg_base;
 		struct ionic_txq_sg_desc *txq_sgl;
@@ -261,8 +253,14 @@ struct ionic_queue {
 	};
 	struct xdp_rxq_info *xdp_rxq_info;
 	struct bpf_prog *xdp_prog;
+	struct page_pool *page_pool;
 	struct ionic_queue *partner;
 
+	union {
+		void __iomem *cmb_base;
+		struct ionic_txq_desc __iomem *cmb_txq;
+		struct ionic_rxq_desc __iomem *cmb_rxq;
+	};
 	unsigned int type;
 	unsigned int hw_index;
 	dma_addr_t base_pa;

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -13,6 +13,7 @@
 #include <linux/cpumask.h>
 #include <linux/crash_dump.h>
 #include <linux/vmalloc.h>
+#include <net/page_pool/helpers.h>
 
 #include "ionic.h"
 #include "ionic_bus.h"
@@ -439,6 +440,9 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 		qcq->sg_base_pa = 0;
 	}
 
+	page_pool_destroy(qcq->q.page_pool);
+	qcq->q.page_pool = NULL;
+
 	ionic_qcq_intr_free(lif, qcq);
 	vfree(qcq->q.info);
 	qcq->q.info = NULL;
@@ -553,7 +557,8 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 			   unsigned int cq_desc_size,
 			   unsigned int sg_desc_size,
 			   unsigned int desc_info_size,
-			   unsigned int pid, struct ionic_qcq **qcq)
+			   unsigned int pid, struct bpf_prog *xdp_prog,
+			   struct ionic_qcq **qcq)
 {
 	struct ionic_dev *idev = &lif->ionic->idev;
 	struct device *dev = lif->ionic->dev;
@@ -579,6 +584,31 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 		goto err_out_free_qcq;
 	}
 
+	if (type == IONIC_QTYPE_RXQ) {
+		struct page_pool_params pp_params = {
+			.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
+			.order = 0,
+			.pool_size = num_descs,
+			.nid = NUMA_NO_NODE,
+			.dev = lif->ionic->dev,
+			.napi = &new->napi,
+			.dma_dir = DMA_FROM_DEVICE,
+			.max_len = PAGE_SIZE,
+			.netdev = lif->netdev,
+		};
+
+		if (xdp_prog)
+			pp_params.dma_dir = DMA_BIDIRECTIONAL;
+
+		new->q.page_pool = page_pool_create(&pp_params);
+		if (IS_ERR(new->q.page_pool)) {
+			netdev_err(lif->netdev, "Cannot create page_pool\n");
+			err = PTR_ERR(new->q.page_pool);
+			new->q.page_pool = NULL;
+			goto err_out_free_q_info;
+		}
+	}
+
 	new->q.type = type;
 	new->q.max_sg_elems = lif->qtype_info[type].max_sg_elems;
 
@@ -586,12 +616,12 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 			   desc_size, sg_desc_size, pid);
 	if (err) {
 		netdev_err(lif->netdev, "Cannot initialize queue\n");
-		goto err_out_free_q_info;
+		goto err_out_free_page_pool;
 	}
 
 	err = ionic_alloc_qcq_interrupt(lif, new);
 	if (err)
-		goto err_out_free_q_info;
+		goto err_out_free_page_pool;
 
 	err = ionic_cq_init(lif, &new->cq, &new->intr, num_descs, cq_desc_size);
 	if (err) {
@@ -712,6 +742,8 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 		devm_free_irq(dev, new->intr.vector, &new->napi);
 		ionic_intr_free(lif->ionic, new->intr.index);
 	}
+err_out_free_page_pool:
+	page_pool_destroy(new->q.page_pool);
 err_out_free_q_info:
 	vfree(new->q.info);
 err_out_free_qcq:
@@ -734,7 +766,7 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 			      sizeof(struct ionic_admin_comp),
 			      0,
 			      sizeof(struct ionic_admin_desc_info),
-			      lif->kern_pid, &lif->adminqcq);
+			      lif->kern_pid, NULL, &lif->adminqcq);
 	if (err)
 		return err;
 	ionic_debugfs_add_qcq(lif, lif->adminqcq);
@@ -747,7 +779,7 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 				      sizeof(union ionic_notifyq_comp),
 				      0,
 				      sizeof(struct ionic_admin_desc_info),
-				      lif->kern_pid, &lif->notifyqcq);
+				      lif->kern_pid, NULL, &lif->notifyqcq);
 		if (err)
 			goto err_out;
 		ionic_debugfs_add_qcq(lif, lif->notifyqcq);
@@ -965,7 +997,7 @@ int ionic_lif_create_hwstamp_txq(struct ionic_lif *lif)
 	err = ionic_qcq_alloc(lif, IONIC_QTYPE_TXQ, txq_i, "hwstamp_tx", flags,
 			      num_desc, desc_sz, comp_sz, sg_desc_sz,
 			      sizeof(struct ionic_tx_desc_info),
-			      lif->kern_pid, &txq);
+			      lif->kern_pid, NULL, &txq);
 	if (err)
 		goto err_qcq_alloc;
 
@@ -1025,7 +1057,7 @@ int ionic_lif_create_hwstamp_rxq(struct ionic_lif *lif)
 	err = ionic_qcq_alloc(lif, IONIC_QTYPE_RXQ, rxq_i, "hwstamp_rx", flags,
 			      num_desc, desc_sz, comp_sz, sg_desc_sz,
 			      sizeof(struct ionic_rx_desc_info),
-			      lif->kern_pid, &rxq);
+			      lif->kern_pid, NULL, &rxq);
 	if (err)
 		goto err_qcq_alloc;
 
@@ -2051,7 +2083,7 @@ static int ionic_txrx_alloc(struct ionic_lif *lif)
 		err = ionic_qcq_alloc(lif, IONIC_QTYPE_TXQ, i, "tx", flags,
 				      num_desc, desc_sz, comp_sz, sg_desc_sz,
 				      sizeof(struct ionic_tx_desc_info),
-				      lif->kern_pid, &lif->txqcqs[i]);
+				      lif->kern_pid, NULL, &lif->txqcqs[i]);
 		if (err)
 			goto err_out;
 
@@ -2083,7 +2115,8 @@ static int ionic_txrx_alloc(struct ionic_lif *lif)
 		err = ionic_qcq_alloc(lif, IONIC_QTYPE_RXQ, i, "rx", flags,
 				      num_desc, desc_sz, comp_sz, sg_desc_sz,
 				      sizeof(struct ionic_rx_desc_info),
-				      lif->kern_pid, &lif->rxqcqs[i]);
+				      lif->kern_pid, lif->xdp_prog,
+				      &lif->rxqcqs[i]);
 		if (err)
 			goto err_out;
 
@@ -2679,14 +2712,14 @@ static int ionic_register_rxq_info(struct ionic_queue *q, unsigned int napi_id)
 
 	err = xdp_rxq_info_reg(rxq_info, q->lif->netdev, q->index, napi_id);
 	if (err) {
-		dev_err(q->dev, "Queue %d xdp_rxq_info_reg failed, err %d\n",
+		netdev_err(q->lif->netdev, "q%d xdp_rxq_info_reg failed, err %d\n",
 			   q->index, err);
 		goto err_out;
 	}
 
-	err = xdp_rxq_info_reg_mem_model(rxq_info, MEM_TYPE_PAGE_ORDER0, NULL);
+	err = xdp_rxq_info_reg_mem_model(rxq_info, MEM_TYPE_PAGE_POOL, q->page_pool);
 	if (err) {
-		dev_err(q->dev, "Queue %d xdp_rxq_info_reg_mem_model failed, err %d\n",
+		netdev_err(q->lif->netdev, "q%d xdp_rxq_info_reg_mem_model failed, err %d\n",
 			   q->index, err);
 		xdp_rxq_info_unreg(rxq_info);
 		goto err_out;
@@ -2853,7 +2886,16 @@ static int ionic_cmb_reconfig(struct ionic_lif *lif,
 
 static void ionic_swap_queues(struct ionic_qcq *a, struct ionic_qcq *b)
 {
-	/* only swapping the queues, not the napi, flags, or other stuff */
+	/* only swapping the queues and napi, not flags or other stuff */
+	swap(a->napi,         b->napi);
+
+	if (a->q.type == IONIC_QTYPE_RXQ) {
+		swap(a->q.page_pool, b->q.page_pool);
+		a->q.page_pool->p.napi = &a->napi;
+		if (b->q.page_pool)  /* is NULL when increasing queue count */
+			b->q.page_pool->p.napi = &b->napi;
+	}
+
 	swap(a->q.features,   b->q.features);
 	swap(a->q.num_descs,  b->q.num_descs);
 	swap(a->q.desc_size,  b->q.desc_size);
@@ -2943,7 +2985,7 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 				err = ionic_qcq_alloc(lif, IONIC_QTYPE_TXQ, i, "tx", flags,
 						      4, desc_sz, comp_sz, sg_desc_sz,
 						      sizeof(struct ionic_tx_desc_info),
-						      lif->kern_pid, &lif->txqcqs[i]);
+						      lif->kern_pid, NULL, &lif->txqcqs[i]);
 				if (err)
 					goto err_out;
 			}
@@ -2952,7 +2994,7 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 			err = ionic_qcq_alloc(lif, IONIC_QTYPE_TXQ, i, "tx", flags,
 					      num_desc, desc_sz, comp_sz, sg_desc_sz,
 					      sizeof(struct ionic_tx_desc_info),
-					      lif->kern_pid, &tx_qcqs[i]);
+					      lif->kern_pid, NULL, &tx_qcqs[i]);
 			if (err)
 				goto err_out;
 		}
@@ -2974,7 +3016,7 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 				err = ionic_qcq_alloc(lif, IONIC_QTYPE_RXQ, i, "rx", flags,
 						      4, desc_sz, comp_sz, sg_desc_sz,
 						      sizeof(struct ionic_rx_desc_info),
-						      lif->kern_pid, &lif->rxqcqs[i]);
+						      lif->kern_pid, NULL, &lif->rxqcqs[i]);
 				if (err)
 					goto err_out;
 			}
@@ -2983,7 +3025,7 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 			err = ionic_qcq_alloc(lif, IONIC_QTYPE_RXQ, i, "rx", flags,
 					      num_desc, desc_sz, comp_sz, sg_desc_sz,
 					      sizeof(struct ionic_rx_desc_info),
-					      lif->kern_pid, &rx_qcqs[i]);
+					      lif->kern_pid, qparam->xdp_prog, &rx_qcqs[i]);
 			if (err)
 				goto err_out;
 

drivers/net/ethernet/pensando/ionic/ionic_txrx.c

@@ -6,6 +6,7 @@
 #include <linux/if_vlan.h>
 #include <net/ip6_checksum.h>
 #include <net/netdev_queues.h>
+#include <net/page_pool/helpers.h>
 
 #include "ionic.h"
 #include "ionic_lif.h"
@@ -118,108 +119,57 @@ static void *ionic_rx_buf_va(struct ionic_buf_info *buf_info)
 
 static dma_addr_t ionic_rx_buf_pa(struct ionic_buf_info *buf_info)
 {
-	return buf_info->dma_addr + buf_info->page_offset;
+	return page_pool_get_dma_addr(buf_info->page) + buf_info->page_offset;
 }
 
-static unsigned int ionic_rx_buf_size(struct ionic_buf_info *buf_info)
+static void __ionic_rx_put_buf(struct ionic_queue *q,
+			       struct ionic_buf_info *buf_info,
+			       bool recycle_direct)
 {
-	return min_t(u32, IONIC_MAX_BUF_LEN, IONIC_PAGE_SIZE - buf_info->page_offset);
-}
-
-static int ionic_rx_page_alloc(struct ionic_queue *q,
-			       struct ionic_buf_info *buf_info)
-{
-	struct device *dev = q->dev;
-	dma_addr_t dma_addr;
-	struct page *page;
-
-	page = alloc_pages(IONIC_PAGE_GFP_MASK, 0);
-	if (unlikely(!page)) {
-		net_err_ratelimited("%s: %s page alloc failed\n",
-				    dev_name(dev), q->name);
-		q_to_rx_stats(q)->alloc_err++;
-		return -ENOMEM;
-	}
-
-	dma_addr = dma_map_page(dev, page, 0,
-				IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
-	if (unlikely(dma_mapping_error(dev, dma_addr))) {
-		__free_pages(page, 0);
-		net_err_ratelimited("%s: %s dma map failed\n",
-				    dev_name(dev), q->name);
-		q_to_rx_stats(q)->dma_map_err++;
-		return -EIO;
-	}
-
-	buf_info->dma_addr = dma_addr;
-	buf_info->page = page;
-	buf_info->page_offset = 0;
-
-	return 0;
-}
-
-static void ionic_rx_page_free(struct ionic_queue *q,
-			       struct ionic_buf_info *buf_info)
-{
-	struct device *dev = q->dev;
-
-	if (unlikely(!buf_info)) {
-		net_err_ratelimited("%s: %s invalid buf_info in free\n",
-				    dev_name(dev), q->name);
-		return;
-	}
-
 	if (!buf_info->page)
 		return;
 
-	dma_unmap_page(dev, buf_info->dma_addr, IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
+	page_pool_put_full_page(q->page_pool, buf_info->page, recycle_direct);
-	__free_pages(buf_info->page, 0);
 	buf_info->page = NULL;
+	buf_info->len = 0;
+	buf_info->page_offset = 0;
 }
 
-static bool ionic_rx_buf_recycle(struct ionic_queue *q,
+
-				 struct ionic_buf_info *buf_info, u32 len)
+static void ionic_rx_put_buf(struct ionic_queue *q,
+			     struct ionic_buf_info *buf_info)
 {
-	u32 size;
+	__ionic_rx_put_buf(q, buf_info, false);
+}
 
-	/* don't re-use pages allocated in low-mem condition */
+static void ionic_rx_put_buf_direct(struct ionic_queue *q,
-	if (page_is_pfmemalloc(buf_info->page))
+				    struct ionic_buf_info *buf_info)
-		return false;
+{
-
+	__ionic_rx_put_buf(q, buf_info, true);
-	/* don't re-use buffers from non-local numa nodes */
-	if (page_to_nid(buf_info->page) != numa_mem_id())
-		return false;
-
-	size = ALIGN(len, q->xdp_prog ? IONIC_PAGE_SIZE : IONIC_PAGE_SPLIT_SZ);
-	buf_info->page_offset += size;
-	if (buf_info->page_offset >= IONIC_PAGE_SIZE)
-		return false;
-
-	get_page(buf_info->page);
-
-	return true;
 }
 
 static void ionic_rx_add_skb_frag(struct ionic_queue *q,
 				  struct sk_buff *skb,
 				  struct ionic_buf_info *buf_info,
-				  u32 off, u32 len,
+				  u32 headroom, u32 len,
 				  bool synced)
 {
 	if (!synced)
-		dma_sync_single_range_for_cpu(q->dev, ionic_rx_buf_pa(buf_info),
+		page_pool_dma_sync_for_cpu(q->page_pool,
-					      off, len, DMA_FROM_DEVICE);
+					   buf_info->page,
+					   buf_info->page_offset + headroom,
+					   len);
 
 	skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
-			buf_info->page, buf_info->page_offset + off,
+			buf_info->page, buf_info->page_offset + headroom,
-			len,
+			len, buf_info->len);
-			IONIC_PAGE_SIZE);
 
-	if (!ionic_rx_buf_recycle(q, buf_info, len)) {
+	/* napi_gro_frags() will release/recycle the
-		dma_unmap_page(q->dev, buf_info->dma_addr,
+	 * page_pool buffers from the frags list
-			       IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
+	 */
 	buf_info->page = NULL;
-	}
+	buf_info->len = 0;
+	buf_info->page_offset = 0;
 }
 
 static struct sk_buff *ionic_rx_build_skb(struct ionic_queue *q,
@@ -244,12 +194,13 @@ static struct sk_buff *ionic_rx_build_skb(struct ionic_queue *q,
 		q_to_rx_stats(q)->alloc_err++;
 		return NULL;
 	}
+	skb_mark_for_recycle(skb);
 
 	if (headroom)
 		frag_len = min_t(u16, len,
 				 IONIC_XDP_MAX_LINEAR_MTU + VLAN_ETH_HLEN);
 	else
-		frag_len = min_t(u16, len, ionic_rx_buf_size(buf_info));
+		frag_len = min_t(u16, len, IONIC_PAGE_SIZE);
 
 	if (unlikely(!buf_info->page))
 		goto err_bad_buf_page;
@@ -260,7 +211,7 @@ static struct sk_buff *ionic_rx_build_skb(struct ionic_queue *q,
 	for (i = 0; i < num_sg_elems; i++, buf_info++) {
 		if (unlikely(!buf_info->page))
 			goto err_bad_buf_page;
-		frag_len = min_t(u16, len, ionic_rx_buf_size(buf_info));
+		frag_len = min_t(u16, len, buf_info->len);
 		ionic_rx_add_skb_frag(q, skb, buf_info, 0, frag_len, synced);
 		len -= frag_len;
 	}
@@ -277,11 +228,13 @@ static struct sk_buff *ionic_rx_copybreak(struct net_device *netdev,
 					  struct ionic_rx_desc_info *desc_info,
 					  unsigned int headroom,
 					  unsigned int len,
+					  unsigned int num_sg_elems,
 					  bool synced)
 {
 	struct ionic_buf_info *buf_info;
 	struct device *dev = q->dev;
 	struct sk_buff *skb;
+	int i;
 
 	buf_info = &desc_info->bufs[0];
 
@@ -292,54 +245,52 @@ static struct sk_buff *ionic_rx_copybreak(struct net_device *netdev,
 		q_to_rx_stats(q)->alloc_err++;
 		return NULL;
 	}
-
+	skb_mark_for_recycle(skb);
-	if (unlikely(!buf_info->page)) {
-		dev_kfree_skb(skb);
-		return NULL;
-	}
 
 	if (!synced)
-		dma_sync_single_range_for_cpu(dev, ionic_rx_buf_pa(buf_info),
+		page_pool_dma_sync_for_cpu(q->page_pool,
-					      headroom, len, DMA_FROM_DEVICE);
+					   buf_info->page,
+					   buf_info->page_offset + headroom,
+					   len);
+
 	skb_copy_to_linear_data(skb, ionic_rx_buf_va(buf_info) + headroom, len);
-	dma_sync_single_range_for_device(dev, ionic_rx_buf_pa(buf_info),
-					 headroom, len, DMA_FROM_DEVICE);
 
 	skb_put(skb, len);
 	skb->protocol = eth_type_trans(skb, netdev);
 
+	/* recycle the Rx buffer now that we're done with it */
+	ionic_rx_put_buf_direct(q, buf_info);
+	buf_info++;
+	for (i = 0; i < num_sg_elems; i++, buf_info++)
+		ionic_rx_put_buf_direct(q, buf_info);
+
 	return skb;
 }
 
 static void ionic_xdp_tx_desc_clean(struct ionic_queue *q,
-				    struct ionic_tx_desc_info *desc_info)
+				    struct ionic_tx_desc_info *desc_info,
+				    bool in_napi)
 {
-	unsigned int nbufs = desc_info->nbufs;
+	struct xdp_frame_bulk bq;
-	struct ionic_buf_info *buf_info;
-	struct device *dev = q->dev;
-	int i;
 
-	if (!nbufs)
+	if (!desc_info->nbufs)
 		return;
 
-	buf_info = desc_info->bufs;
+	xdp_frame_bulk_init(&bq);
-	dma_unmap_single(dev, buf_info->dma_addr,
+	rcu_read_lock(); /* need for xdp_return_frame_bulk */
-			 buf_info->len, DMA_TO_DEVICE);
-	if (desc_info->act == XDP_TX)
-		__free_pages(buf_info->page, 0);
-	buf_info->page = NULL;
 
-	buf_info++;
+	if (desc_info->act == XDP_TX) {
-	for (i = 1; i < nbufs + 1 && buf_info->page; i++, buf_info++) {
+		if (likely(in_napi))
-		dma_unmap_page(dev, buf_info->dma_addr,
+			xdp_return_frame_rx_napi(desc_info->xdpf);
-			       buf_info->len, DMA_TO_DEVICE);
+		else
-		if (desc_info->act == XDP_TX)
+			xdp_return_frame(desc_info->xdpf);
-			__free_pages(buf_info->page, 0);
+	} else if (desc_info->act == XDP_REDIRECT) {
-		buf_info->page = NULL;
+		ionic_tx_desc_unmap_bufs(q, desc_info);
+		xdp_return_frame_bulk(desc_info->xdpf, &bq);
 	}
 
-	if (desc_info->act == XDP_REDIRECT)
+	xdp_flush_frame_bulk(&bq);
-		xdp_return_frame(desc_info->xdpf);
+	rcu_read_unlock();
 
 	desc_info->nbufs = 0;
 	desc_info->xdpf = NULL;
@@ -363,9 +314,17 @@ static int ionic_xdp_post_frame(struct ionic_queue *q, struct xdp_frame *frame,
 	buf_info = desc_info->bufs;
 	stats = q_to_tx_stats(q);
 
+	if (act == XDP_TX) {
+		dma_addr = page_pool_get_dma_addr(page) +
+			   off + XDP_PACKET_HEADROOM;
+		dma_sync_single_for_device(q->dev, dma_addr,
+					   len, DMA_TO_DEVICE);
+	} else /* XDP_REDIRECT */ {
 		dma_addr = ionic_tx_map_single(q, frame->data, len);
 		if (!dma_addr)
 			return -EIO;
+	}
+
 	buf_info->dma_addr = dma_addr;
 	buf_info->len = len;
 	buf_info->page = page;
@@ -387,11 +346,22 @@ static int ionic_xdp_post_frame(struct ionic_queue *q, struct xdp_frame *frame,
 		frag = sinfo->frags;
 		elem = ionic_tx_sg_elems(q);
 		for (i = 0; i < sinfo->nr_frags; i++, frag++, bi++) {
-			dma_addr = ionic_tx_map_frag(q, frag, 0, skb_frag_size(frag));
+			if (act == XDP_TX) {
-			if (!dma_addr) {
+				struct page *pg = skb_frag_page(frag);
+
+				dma_addr = page_pool_get_dma_addr(pg) +
+					   skb_frag_off(frag);
+				dma_sync_single_for_device(q->dev, dma_addr,
+							   skb_frag_size(frag),
+							   DMA_TO_DEVICE);
+			} else {
+				dma_addr = ionic_tx_map_frag(q, frag, 0,
+							     skb_frag_size(frag));
+				if (dma_mapping_error(q->dev, dma_addr)) {
 					ionic_tx_desc_unmap_bufs(q, desc_info);
 					return -EIO;
 				}
+			}
 			bi->dma_addr = dma_addr;
 			bi->len = skb_frag_size(frag);
 			bi->page = skb_frag_page(frag);
@@ -488,8 +458,6 @@ static void ionic_xdp_rx_unlink_bufs(struct ionic_queue *q,
 	int i;
 
 	for (i = 0; i < nbufs; i++) {
-		dma_unmap_page(q->dev, buf_info->dma_addr,
-			       IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
 		buf_info->page = NULL;
 		buf_info++;
 	}
@@ -516,11 +484,9 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats,
 	frag_len = min_t(u16, len, IONIC_XDP_MAX_LINEAR_MTU + VLAN_ETH_HLEN);
 	xdp_prepare_buff(&xdp_buf, ionic_rx_buf_va(buf_info),
 			 XDP_PACKET_HEADROOM, frag_len, false);
-
+	page_pool_dma_sync_for_cpu(rxq->page_pool, buf_info->page,
-	dma_sync_single_range_for_cpu(rxq->dev, ionic_rx_buf_pa(buf_info),
+				   buf_info->page_offset + XDP_PACKET_HEADROOM,
-				      XDP_PACKET_HEADROOM, frag_len,
+				   frag_len);
-				      DMA_FROM_DEVICE);
-
 	prefetchw(&xdp_buf.data_hard_start);
 
 	/*  We limit MTU size to one buffer if !xdp_has_frags, so
@@ -542,15 +508,16 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats,
 		do {
 			if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS)) {
 				err = -ENOSPC;
-				goto out_xdp_abort;
+				break;
 			}
 
 			frag = &sinfo->frags[sinfo->nr_frags];
 			sinfo->nr_frags++;
 			bi++;
-			frag_len = min_t(u16, remain_len, ionic_rx_buf_size(bi));
+			frag_len = min_t(u16, remain_len, bi->len);
-			dma_sync_single_range_for_cpu(rxq->dev, ionic_rx_buf_pa(bi),
+			page_pool_dma_sync_for_cpu(rxq->page_pool, bi->page,
-						      0, frag_len, DMA_FROM_DEVICE);
+						   buf_info->page_offset,
+						   frag_len);
 			skb_frag_fill_page_desc(frag, bi->page, 0, frag_len);
 			sinfo->xdp_frags_size += frag_len;
 			remain_len -= frag_len;
@@ -569,14 +536,16 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats,
 		return false;  /* false = we didn't consume the packet */
 
 	case XDP_DROP:
-		ionic_rx_page_free(rxq, buf_info);
+		ionic_rx_put_buf_direct(rxq, buf_info);
 		stats->xdp_drop++;
 		break;
 
 	case XDP_TX:
 		xdpf = xdp_convert_buff_to_frame(&xdp_buf);
-		if (!xdpf)
+		if (!xdpf) {
-			goto out_xdp_abort;
+			err = -ENOSPC;
+			break;
+		}
 
 		txq = rxq->partner;
 		nq = netdev_get_tx_queue(netdev, txq->index);
@@ -588,7 +557,8 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats,
 					  ionic_q_space_avail(txq),
 					  1, 1)) {
 			__netif_tx_unlock(nq);
-			goto out_xdp_abort;
+			err = -EIO;
+			break;
 		}
 
 		err = ionic_xdp_post_frame(txq, xdpf, XDP_TX,
@@ -598,19 +568,17 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats,
 		__netif_tx_unlock(nq);
 		if (unlikely(err)) {
 			netdev_dbg(netdev, "tx ionic_xdp_post_frame err %d\n", err);
-			goto out_xdp_abort;
+			break;
 		}
 		ionic_xdp_rx_unlink_bufs(rxq, buf_info, nbufs);
 		stats->xdp_tx++;
-
-		/* the Tx completion will free the buffers */
 		break;
 
 	case XDP_REDIRECT:
 		err = xdp_do_redirect(netdev, &xdp_buf, xdp_prog);
 		if (unlikely(err)) {
 			netdev_dbg(netdev, "xdp_do_redirect err %d\n", err);
-			goto out_xdp_abort;
+			break;
 		}
 		ionic_xdp_rx_unlink_bufs(rxq, buf_info, nbufs);
 		rxq->xdp_flush = true;
@@ -619,15 +587,15 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats,
 
 	case XDP_ABORTED:
 	default:
-		goto out_xdp_abort;
+		err = -EIO;
+		break;
 	}
 
-	return true;
+	if (err) {
-
+		ionic_rx_put_buf_direct(rxq, buf_info);
-out_xdp_abort:
 		trace_xdp_exception(netdev, xdp_prog, xdp_action);
-	ionic_rx_page_free(rxq, buf_info);
 		stats->xdp_aborted++;
+	}
 
 	return true;
 }
@@ -673,7 +641,8 @@ static void ionic_rx_clean(struct ionic_queue *q,
 	use_copybreak = len <= q->lif->rx_copybreak;
 	if (use_copybreak)
 		skb = ionic_rx_copybreak(netdev, q, desc_info,
-					 headroom, len, synced);
+					 headroom, len,
+					 comp->num_sg_elems, synced);
 	else
 		skb = ionic_rx_build_skb(q, desc_info, headroom, len,
 					 comp->num_sg_elems, synced);
@@ -794,6 +763,9 @@ void ionic_rx_fill(struct ionic_queue *q)
 	struct ionic_buf_info *buf_info;
 	unsigned int fill_threshold;
 	struct ionic_rxq_desc *desc;
+	unsigned int first_frag_len;
+	unsigned int first_buf_len;
+	unsigned int headroom = 0;
 	unsigned int remain_len;
 	unsigned int frag_len;
 	unsigned int nfrags;
@@ -811,35 +783,42 @@ void ionic_rx_fill(struct ionic_queue *q)
 
 	len = netdev->mtu + VLAN_ETH_HLEN;
 
-	for (i = n_fill; i; i--) {
+	if (q->xdp_prog) {
-		unsigned int headroom = 0;
+		/* Always alloc the full size buffer, but only need
-		unsigned int buf_len;
+		 * the actual frag_len in the descriptor
+		 * XDP uses space in the first buffer, so account for
+		 * head room, tail room, and ip header in the first frag size.
+		 */
+		headroom = XDP_PACKET_HEADROOM;
+		first_buf_len = IONIC_XDP_MAX_LINEAR_MTU + VLAN_ETH_HLEN + headroom;
+		first_frag_len = min_t(u16, len + headroom, first_buf_len);
+	} else {
+		/* Use MTU size if smaller than max buffer size */
+		first_frag_len = min_t(u16, len, IONIC_PAGE_SIZE);
+		first_buf_len = first_frag_len;
+	}
 
+	for (i = n_fill; i; i--) {
+		/* fill main descriptor - buf[0] */
 		nfrags = 0;
 		remain_len = len;
 		desc = &q->rxq[q->head_idx];
 		desc_info = &q->rx_info[q->head_idx];
 		buf_info = &desc_info->bufs[0];
 
-		if (!buf_info->page) { /* alloc a new buffer? */
+		buf_info->len = first_buf_len;
-			if (unlikely(ionic_rx_page_alloc(q, buf_info))) {
+		frag_len = first_frag_len - headroom;
-				desc->addr = 0;
+
-				desc->len = 0;
+		/* get a new buffer if we can't reuse one */
+		if (!buf_info->page)
+			buf_info->page = page_pool_alloc(q->page_pool,
+							 &buf_info->page_offset,
+							 &buf_info->len,
+							 GFP_ATOMIC);
+		if (unlikely(!buf_info->page)) {
+			buf_info->len = 0;
 			return;
 		}
-		}
-
-		/* fill main descriptor - buf[0]
-		 * XDP uses space in the first buffer, so account for
-		 * head room, tail room, and ip header in the first frag size.
-		 */
-		if (q->xdp_prog) {
-			buf_len = IONIC_XDP_MAX_LINEAR_MTU + VLAN_ETH_HLEN;
-			headroom = XDP_PACKET_HEADROOM;
-		} else {
-			buf_len = ionic_rx_buf_size(buf_info);
-		}
-		frag_len = min_t(u16, len, buf_len);
 
 		desc->addr = cpu_to_le64(ionic_rx_buf_pa(buf_info) + headroom);
 		desc->len = cpu_to_le16(frag_len);
@@ -850,16 +829,26 @@ void ionic_rx_fill(struct ionic_queue *q)
 		/* fill sg descriptors - buf[1..n] */
 		sg_elem = q->rxq_sgl[q->head_idx].elems;
 		for (j = 0; remain_len > 0 && j < q->max_sg_elems; j++, sg_elem++) {
-			if (!buf_info->page) { /* alloc a new sg buffer? */
+			frag_len = min_t(u16, remain_len, IONIC_PAGE_SIZE);
-				if (unlikely(ionic_rx_page_alloc(q, buf_info))) {
+
-					sg_elem->addr = 0;
+			/* Recycle any leftover buffers that are too small to reuse */
-					sg_elem->len = 0;
+			if (unlikely(buf_info->page && buf_info->len < frag_len))
+				ionic_rx_put_buf_direct(q, buf_info);
+
+			/* Get new buffer if needed */
+			if (!buf_info->page) {
+				buf_info->len = frag_len;
+				buf_info->page = page_pool_alloc(q->page_pool,
+								 &buf_info->page_offset,
+								 &buf_info->len,
+								 GFP_ATOMIC);
+				if (unlikely(!buf_info->page)) {
+					buf_info->len = 0;
 					return;
 				}
 			}
 
 			sg_elem->addr = cpu_to_le64(ionic_rx_buf_pa(buf_info));
-			frag_len = min_t(u16, remain_len, ionic_rx_buf_size(buf_info));
 			sg_elem->len = cpu_to_le16(frag_len);
 			remain_len -= frag_len;
 			buf_info++;
@@ -889,17 +878,12 @@ void ionic_rx_fill(struct ionic_queue *q)
 void ionic_rx_empty(struct ionic_queue *q)
 {
 	struct ionic_rx_desc_info *desc_info;
-	struct ionic_buf_info *buf_info;
 	unsigned int i, j;
 
 	for (i = 0; i < q->num_descs; i++) {
 		desc_info = &q->rx_info[i];
-		for (j = 0; j < ARRAY_SIZE(desc_info->bufs); j++) {
+		for (j = 0; j < ARRAY_SIZE(desc_info->bufs); j++)
-			buf_info = &desc_info->bufs[j];
+			ionic_rx_put_buf(q, &desc_info->bufs[j]);
-			if (buf_info->page)
-				ionic_rx_page_free(q, buf_info);
-		}
-
 		desc_info->nbufs = 0;
 	}
 
@@ -1172,7 +1156,7 @@ static void ionic_tx_clean(struct ionic_queue *q,
 	struct sk_buff *skb;
 
 	if (desc_info->xdpf) {
-		ionic_xdp_tx_desc_clean(q->partner, desc_info);
+		ionic_xdp_tx_desc_clean(q->partner, desc_info, in_napi);
 		stats->clean++;
 
 		if (unlikely(__netif_subqueue_stopped(q->lif->netdev, q->index)))