diff mbox series

[net-next,5/7] bnxt_en: Add XDP Metadata support

Message ID 20240401035730.306790-6-pavan.chebbi@broadcom.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series bnxt_en: Update for net-next | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
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: 943 this patch: 943
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: bpf@vger.kernel.org
netdev/build_clang success Errors and warnings before: 954 this patch: 954
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: 956 this patch: 956
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 70 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline fail Was 1 now: 3
netdev/contest success net-next-2024-04-01--06-00 (tests: 952)

Commit Message

Pavan Chebbi April 1, 2024, 3:57 a.m. UTC 
From: Somnath Kotur <somnath.kotur@broadcom.com>

- Change the last arg to xdp_prepare_buff to true from false.
- Ensure that when XDP_PASS is returned the xdp->data_meta area
is copied to the skb->data area. Account for the meta data
size on skb allocation and do a pull after to move it to the
"reserved" zone.

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 44 +++++++++++++++++--
 drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c |  2 +-
 2 files changed, 41 insertions(+), 5 deletions(-)

Comments

Jakub Kicinski April 2, 2024, 4:53 a.m. UTC | #1 
On Sun, 31 Mar 2024 20:57:28 -0700 Pavan Chebbi wrote:
> +static inline struct sk_buff *bnxt_copy_skb(struct bnxt_napi *bnapi, u8 *data,
> +					    unsigned int len,
> +					    dma_addr_t mapping)
> +{
> +	return bnxt_copy_data(bnapi, data, len, mapping);
> +}
> +
> +static inline struct sk_buff *bnxt_copy_xdp(struct bnxt_napi *bnapi,

No inlines in C sources unless you have measured perf difference
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 7dda4cd76715..1494b550299a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1296,9 +1296,9 @@  static int bnxt_agg_bufs_valid(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	return RX_AGG_CMP_VALID(agg, *raw_cons);
 }
 
-static inline struct sk_buff *bnxt_copy_skb(struct bnxt_napi *bnapi, u8 *data,
-					    unsigned int len,
-					    dma_addr_t mapping)
+static inline struct sk_buff *bnxt_copy_data(struct bnxt_napi *bnapi, u8 *data,
+					     unsigned int len,
+					     dma_addr_t mapping)
 {
 	struct bnxt *bp = bnapi->bp;
 	struct pci_dev *pdev = bp->pdev;
@@ -1318,6 +1318,39 @@  static inline struct sk_buff *bnxt_copy_skb(struct bnxt_napi *bnapi, u8 *data,
 				   bp->rx_dir);
 
 	skb_put(skb, len);
+
+	return skb;
+}
+
+static inline struct sk_buff *bnxt_copy_skb(struct bnxt_napi *bnapi, u8 *data,
+					    unsigned int len,
+					    dma_addr_t mapping)
+{
+	return bnxt_copy_data(bnapi, data, len, mapping);
+}
+
+static inline struct sk_buff *bnxt_copy_xdp(struct bnxt_napi *bnapi,
+					    struct xdp_buff *xdp,
+					    unsigned int len,
+					    dma_addr_t mapping)
+{
+	unsigned int metasize = 0;
+	u8 *data = xdp->data;
+	struct sk_buff *skb;
+
+	len = xdp->data_end - xdp->data_meta;
+	metasize = xdp->data - xdp->data_meta;
+	data = xdp->data_meta;
+
+	skb = bnxt_copy_data(bnapi, data, len, mapping);
+	if (!skb)
+		return skb;
+
+	if (metasize) {
+		skb_metadata_set(skb, metasize);
+		__skb_pull(skb, metasize);
+	}
+
 	return skb;
 }
 
@@ -2111,7 +2144,10 @@  static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	}
 
 	if (len <= bp->rx_copy_thresh) {
-		skb = bnxt_copy_skb(bnapi, data_ptr, len, dma_addr);
+		if (!xdp_active)
+			skb = bnxt_copy_skb(bnapi, data_ptr, len, dma_addr);
+		else
+			skb = bnxt_copy_xdp(bnapi, &xdp, len, dma_addr);
 		bnxt_reuse_rx_data(rxr, cons, data);
 		if (!skb) {
 			if (agg_bufs) {
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
index 6b904b4f4d34..345681d5007e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
@@ -197,7 +197,7 @@  void bnxt_xdp_buff_init(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
 	dma_sync_single_for_cpu(&pdev->dev, mapping + offset, len, bp->rx_dir);
 
 	xdp_init_buff(xdp, buflen, &rxr->xdp_rxq);
-	xdp_prepare_buff(xdp, data_ptr - offset, offset, len, false);
+	xdp_prepare_buff(xdp, data_ptr - offset, offset, len, true);
 }
 
 void bnxt_xdp_buff_frags_free(struct bnxt_rx_ring_info *rxr,