diff mbox series

[net-next,v2,08/11] bnxt: add page_pool support for aggregation ring when using xdp

Message ID 1647806284-8529-9-git-send-email-michael.chan@broadcom.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series bnxt: Support XDP multi buffer | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/cc_maintainers warning 6 maintainers not CCed: daniel@iogearbox.net ast@kernel.org hawk@kernel.org john.fastabend@gmail.com pabeni@redhat.com bpf@vger.kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 114 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 March 20, 2022, 7:58 p.m. UTC 
From: Andy Gospodarek <gospo@broadcom.com>

If we are using aggregation rings with XDP enabled, allocate page
buffers for the aggregation rings from the page_pool.

Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 77 ++++++++++++++---------
 1 file changed, 47 insertions(+), 30 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index b635b7ce6ba3..980c176d7c88 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -739,7 +739,6 @@  static struct page *__bnxt_alloc_rx_page(struct bnxt *bp, dma_addr_t *mapping,
 		page_pool_recycle_direct(rxr->page_pool, page);
 		return NULL;
 	}
-	*mapping += bp->rx_dma_offset;
 	return page;
 }
 
@@ -781,6 +780,7 @@  int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
 		if (!page)
 			return -ENOMEM;
 
+		mapping += bp->rx_dma_offset;
 		rx_buf->data = page;
 		rx_buf->data_ptr = page_address(page) + bp->rx_offset;
 	} else {
@@ -841,33 +841,41 @@  static inline int bnxt_alloc_rx_page(struct bnxt *bp,
 	u16 sw_prod = rxr->rx_sw_agg_prod;
 	unsigned int offset = 0;
 
-	if (PAGE_SIZE > BNXT_RX_PAGE_SIZE) {
-		page = rxr->rx_page;
-		if (!page) {
+	if (BNXT_RX_PAGE_MODE(bp)) {
+		page = __bnxt_alloc_rx_page(bp, &mapping, rxr, 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;
-			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;
-	}
 
-	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;
+		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 (unlikely(test_bit(sw_prod, rxr->rx_agg_bmap)))
@@ -1105,7 +1113,7 @@  static u32 __bnxt_rx_agg_pages(struct bnxt *bp,
 		}
 
 		dma_unmap_page_attrs(&pdev->dev, mapping, BNXT_RX_PAGE_SIZE,
-				     DMA_FROM_DEVICE,
+				     bp->rx_dir,
 				     DMA_ATTR_WEAK_ORDERING);
 
 		total_frag_len += frag_len;
@@ -2936,14 +2944,23 @@  static void bnxt_free_one_rx_ring_skbs(struct bnxt *bp, int ring_nr)
 		if (!page)
 			continue;
 
-		dma_unmap_page_attrs(&pdev->dev, rx_agg_buf->mapping,
-				     BNXT_RX_PAGE_SIZE, DMA_FROM_DEVICE,
-				     DMA_ATTR_WEAK_ORDERING);
+		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);
 
-		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);
 
-		__free_page(page);
+			__free_page(page);
+		}
 	}
 
 skip_rx_agg_free: