diff mbox series

[net-next,2/3] bnxt_en: Use the unified RX page pool buffers for XDP and non-XDP

Message ID 20230728231829.235716-3-michael.chan@broadcom.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series bnxt_en: Add support for page pool | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1329 this patch: 1329
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 1351 this patch: 1351
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1352 this patch: 1352
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 120 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Michael Chan July 28, 2023, 11:18 p.m. UTC 
From: Somnath Kotur <somnath.kotur@broadcom.com>

Convert to use the page pool buffers for the aggregation ring when
running in non-XDP mode.  This simplifies the driver and we benefit
from the recycling of pages.  Adjust the page pool size to account
for the aggregation ring size.

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 71 +++++------------------
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  3 -
 2 files changed, 14 insertions(+), 60 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 77ce494643f2..adf785b7aa42 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -875,48 +875,15 @@  static inline int bnxt_alloc_rx_page(struct bnxt *bp,
 	struct rx_bd *rxbd =
 		&rxr->rx_agg_desc_ring[RX_RING(prod)][RX_IDX(prod)];
 	struct bnxt_sw_rx_agg_bd *rx_agg_buf;
-	struct pci_dev *pdev = bp->pdev;
 	struct page *page;
 	dma_addr_t mapping;
 	u16 sw_prod = rxr->rx_sw_agg_prod;
 	unsigned int offset = 0;
 
-	if (BNXT_RX_PAGE_MODE(bp)) {
-		page = __bnxt_alloc_rx_page(bp, &mapping, rxr, &offset, gfp);
-
-		if (!page)
-			return -ENOMEM;
-
-	} else {
-		if (PAGE_SIZE > BNXT_RX_PAGE_SIZE) {
-			page = rxr->rx_page;
-			if (!page) {
-				page = alloc_page(gfp);
-				if (!page)
-					return -ENOMEM;
-				rxr->rx_page = page;
-				rxr->rx_page_offset = 0;
-			}
-			offset = rxr->rx_page_offset;
-			rxr->rx_page_offset += BNXT_RX_PAGE_SIZE;
-			if (rxr->rx_page_offset == PAGE_SIZE)
-				rxr->rx_page = NULL;
-			else
-				get_page(page);
-		} else {
-			page = alloc_page(gfp);
-			if (!page)
-				return -ENOMEM;
-		}
+	page = __bnxt_alloc_rx_page(bp, &mapping, rxr, &offset, gfp);
 
-		mapping = dma_map_page_attrs(&pdev->dev, page, offset,
-					     BNXT_RX_PAGE_SIZE, DMA_FROM_DEVICE,
-					     DMA_ATTR_WEAK_ORDERING);
-		if (dma_mapping_error(&pdev->dev, mapping)) {
-			__free_page(page);
-			return -EIO;
-		}
-	}
+	if (!page)
+		return -ENOMEM;
 
 	if (unlikely(test_bit(sw_prod, rxr->rx_agg_bmap)))
 		sw_prod = bnxt_find_next_agg_idx(rxr, sw_prod);
@@ -1202,6 +1169,7 @@  static struct sk_buff *bnxt_rx_agg_pages_skb(struct bnxt *bp,
 	total_frag_len = __bnxt_rx_agg_pages(bp, cpr, shinfo, idx,
 					     agg_bufs, tpa, NULL);
 	if (!total_frag_len) {
+		skb_mark_for_recycle(skb);
 		dev_kfree_skb(skb);
 		return NULL;
 	}
@@ -1792,6 +1760,7 @@  static void bnxt_deliver_skb(struct bnxt *bp, struct bnxt_napi *bnapi,
 		return;
 	}
 	skb_record_rx_queue(skb, bnapi->index);
+	skb_mark_for_recycle(skb);
 	napi_gro_receive(&bnapi->napi, skb);
 }
 
@@ -3000,30 +2969,16 @@  static void bnxt_free_one_rx_ring_skbs(struct bnxt *bp, int ring_nr)
 		if (!page)
 			continue;
 
-		if (BNXT_RX_PAGE_MODE(bp)) {
-			dma_unmap_page_attrs(&pdev->dev, rx_agg_buf->mapping,
-					     BNXT_RX_PAGE_SIZE, bp->rx_dir,
-					     DMA_ATTR_WEAK_ORDERING);
-			rx_agg_buf->page = NULL;
-			__clear_bit(i, rxr->rx_agg_bmap);
-
-			page_pool_recycle_direct(rxr->page_pool, page);
-		} else {
-			dma_unmap_page_attrs(&pdev->dev, rx_agg_buf->mapping,
-					     BNXT_RX_PAGE_SIZE, DMA_FROM_DEVICE,
-					     DMA_ATTR_WEAK_ORDERING);
-			rx_agg_buf->page = NULL;
-			__clear_bit(i, rxr->rx_agg_bmap);
+		dma_unmap_page_attrs(&pdev->dev, rx_agg_buf->mapping,
+				     BNXT_RX_PAGE_SIZE, bp->rx_dir,
+				     DMA_ATTR_WEAK_ORDERING);
+		rx_agg_buf->page = NULL;
+		__clear_bit(i, rxr->rx_agg_bmap);
 
-			__free_page(page);
-		}
+		page_pool_recycle_direct(rxr->page_pool, page);
 	}
 
 skip_rx_agg_free:
-	if (rxr->rx_page) {
-		__free_page(rxr->rx_page);
-		rxr->rx_page = NULL;
-	}
 	map = rxr->rx_tpa_idx_map;
 	if (map)
 		memset(map->agg_idx_bmap, 0, sizeof(map->agg_idx_bmap));
@@ -3242,7 +3197,9 @@  static int bnxt_alloc_rx_page_pool(struct bnxt *bp,
 {
 	struct page_pool_params pp = { 0 };
 
-	pp.pool_size = bp->rx_ring_size;
+	pp.pool_size = bp->rx_agg_ring_size;
+	if (BNXT_RX_PAGE_MODE(bp))
+		pp.pool_size += bp->rx_ring_size;
 	pp.nid = dev_to_node(&bp->pdev->dev);
 	pp.napi = &rxr->bnapi->napi;
 	pp.dev = &bp->pdev->dev;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 9d16757e27fe..c446037f6bd9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -919,9 +919,6 @@  struct bnxt_rx_ring_info {
 	unsigned long		*rx_agg_bmap;
 	u16			rx_agg_bmap_size;
 
-	struct page		*rx_page;
-	unsigned int		rx_page_offset;
-
 	dma_addr_t		rx_desc_mapping[MAX_RX_PAGES];
 	dma_addr_t		rx_agg_desc_mapping[MAX_RX_AGG_PAGES];