diff mbox series

[v11,bpf-next,06/18] net: marvell: rely on xdp_update_skb_shared_info utility routine

Message ID 19df740fdeea1a84456e9912c13f836efc19fd74.1628854454.git.lorenzo@kernel.org (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series mvneta: introduce XDP multi-buffer support | expand

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Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count fail Series longer than 15 patches
netdev/tree_selection success Clearly marked for bpf-next
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netdev/cc_maintainers warning 7 maintainers not CCed: yhs@fb.com thomas.petazzoni@bootlin.com kafai@fb.com andrii@kernel.org songliubraving@fb.com hawk@kernel.org kpsingh@kernel.org
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/kdoc success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 62 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
netdev/header_inline success Link

Commit Message

Lorenzo Bianconi Aug. 13, 2021, 11:47 a.m. UTC 
Rely on xdp_update_skb_shared_info routine in order to avoid
resetting frags array in skb_shared_info structure building
the skb in mvneta_swbm_build_skb(). Frags array is expected to
be initialized by the receiving driver building the xdp_buff
and here we just need to update memory metadata.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/net/ethernet/marvell/mvneta.c | 35 +++++++++++++++------------
 1 file changed, 20 insertions(+), 15 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index cbf614d6b993..b996eb49d813 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2304,11 +2304,19 @@  mvneta_swbm_add_rx_fragment(struct mvneta_port *pp,
 		skb_frag_size_set(frag, data_len);
 		__skb_frag_set_page(frag, page);
 
-		if (!xdp_buff_is_mb(xdp))
+		if (!xdp_buff_is_mb(xdp)) {
+			sinfo->xdp_frags_size = *size;
 			xdp_buff_set_mb(xdp);
+		}
+		if (page_is_pfmemalloc(page))
+			xdp_buff_set_frag_pfmemalloc(xdp);
 	} else {
 		page_pool_put_full_page(rxq->page_pool, page, true);
 	}
+
+	/* last fragment */
+	if (len == *size)
+		sinfo->xdp_frags_tsize = sinfo->nr_frags * PAGE_SIZE;
 	*size -= len;
 }
 
@@ -2316,13 +2324,18 @@  static struct sk_buff *
 mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool,
 		      struct xdp_buff *xdp, u32 desc_status)
 {
-	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
+	unsigned int size, truesize;
 	struct sk_buff *skb;
 	u8 num_frags;
-	int i;
 
-	if (unlikely(xdp_buff_is_mb(xdp)))
+	if (unlikely(xdp_buff_is_mb(xdp))) {
+		struct skb_shared_info *sinfo;
+
+		sinfo = xdp_get_shared_info_from_buff(xdp);
+		truesize = sinfo->xdp_frags_tsize;
+		size = sinfo->xdp_frags_size;
 		num_frags = sinfo->nr_frags;
+	}
 
 	skb = build_skb(xdp->data_hard_start, PAGE_SIZE);
 	if (!skb)
@@ -2334,18 +2347,10 @@  mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool,
 	skb_put(skb, xdp->data_end - xdp->data);
 	skb->ip_summed = mvneta_rx_csum(pp, desc_status);
 
-	if (likely(!xdp_buff_is_mb(xdp)))
-		goto out;
-
-	for (i = 0; i < num_frags; i++) {
-		skb_frag_t *frag = &sinfo->frags[i];
-
-		skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
-				skb_frag_page(frag), skb_frag_off(frag),
-				skb_frag_size(frag), PAGE_SIZE);
-	}
+	if (unlikely(xdp_buff_is_mb(xdp)))
+		xdp_update_skb_shared_info(skb, num_frags, size, truesize,
+					   xdp_buff_is_frag_pfmemalloc(xdp));
 
-out:
 	return skb;
 }