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From: Stanislav Fomichev <sdf@google.com>
To: bpf@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	martin.lau@linux.dev, song@kernel.org, yhs@fb.com,
	john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com,
	haoluo@google.com, jolsa@kernel.org,
	"Toke Høiland-Jørgensen" <toke@redhat.com>,
	"Saeed Mahameed" <saeedm@nvidia.com>,
	"David Ahern" <dsahern@gmail.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Willem de Bruijn" <willemb@google.com>,
	"Jesper Dangaard Brouer" <brouer@redhat.com>,
	"Anatoly Burakov" <anatoly.burakov@intel.com>,
	"Alexander Lobakin" <alexandr.lobakin@intel.com>,
	"Magnus Karlsson" <magnus.karlsson@gmail.com>,
	"Maryam Tahhan" <mtahhan@redhat.com>,
	xdp-hints@xdp-project.net, netdev@vger.kernel.org
Subject: [PATCH bpf-next v6 15/17] net/mlx5e: Introduce wrapper for xdp_buff
Date: Wed,  4 Jan 2023 13:59:47 -0800	[thread overview]
Message-ID: <20230104215949.529093-16-sdf@google.com> (raw)
In-Reply-To: <20230104215949.529093-1-sdf@google.com>

From: Toke Høiland-Jørgensen <toke@redhat.com>

Preparation for implementing HW metadata kfuncs. No functional change.

Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
Cc: Maryam Tahhan <mtahhan@redhat.com>
Cc: xdp-hints@xdp-project.net
Cc: netdev@vger.kernel.org
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h  |  1 +
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  |  3 +-
 .../net/ethernet/mellanox/mlx5/core/en/xdp.h  |  6 +-
 .../ethernet/mellanox/mlx5/core/en/xsk/rx.c   | 25 +++++----
 .../net/ethernet/mellanox/mlx5/core/en_rx.c   | 56 +++++++++----------
 5 files changed, 49 insertions(+), 42 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 2d77fb8a8a01..af663978d1b4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -469,6 +469,7 @@ struct mlx5e_txqsq {
 union mlx5e_alloc_unit {
 	struct page *page;
 	struct xdp_buff *xsk;
+	struct mlx5e_xdp_buff *mxbuf;
 };
 
 /* XDP packets can be transmitted in different ways. On completion, we need to
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index 20507ef2f956..31bb6806bf5d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -158,8 +158,9 @@ mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq,
 
 /* returns true if packet was consumed by xdp */
 bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct page *page,
-		      struct bpf_prog *prog, struct xdp_buff *xdp)
+		      struct bpf_prog *prog, struct mlx5e_xdp_buff *mxbuf)
 {
+	struct xdp_buff *xdp = &mxbuf->xdp;
 	u32 act;
 	int err;
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
index bc2d9034af5b..389818bf6833 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
@@ -44,10 +44,14 @@
 	(MLX5E_XDP_INLINE_WQE_MAX_DS_CNT * MLX5_SEND_WQE_DS - \
 	 sizeof(struct mlx5_wqe_inline_seg))
 
+struct mlx5e_xdp_buff {
+	struct xdp_buff xdp;
+};
+
 struct mlx5e_xsk_param;
 int mlx5e_xdp_max_mtu(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk);
 bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct page *page,
-		      struct bpf_prog *prog, struct xdp_buff *xdp);
+		      struct bpf_prog *prog, struct mlx5e_xdp_buff *mlctx);
 void mlx5e_xdp_mpwqe_complete(struct mlx5e_xdpsq *sq);
 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq);
 void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
index c91b54d9ff27..9cff82d764e3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
@@ -22,6 +22,7 @@ int mlx5e_xsk_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 		goto err;
 
 	BUILD_BUG_ON(sizeof(wi->alloc_units[0]) != sizeof(wi->alloc_units[0].xsk));
+	XSK_CHECK_PRIV_TYPE(struct mlx5e_xdp_buff);
 	batch = xsk_buff_alloc_batch(rq->xsk_pool, (struct xdp_buff **)wi->alloc_units,
 				     rq->mpwqe.pages_per_wqe);
 
@@ -233,7 +234,7 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 						    u32 head_offset,
 						    u32 page_idx)
 {
-	struct xdp_buff *xdp = wi->alloc_units[page_idx].xsk;
+	struct mlx5e_xdp_buff *mxbuf = wi->alloc_units[page_idx].mxbuf;
 	struct bpf_prog *prog;
 
 	/* Check packet size. Note LRO doesn't use linear SKB */
@@ -249,9 +250,9 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 	 */
 	WARN_ON_ONCE(head_offset);
 
-	xsk_buff_set_size(xdp, cqe_bcnt);
-	xsk_buff_dma_sync_for_cpu(xdp, rq->xsk_pool);
-	net_prefetch(xdp->data);
+	xsk_buff_set_size(&mxbuf->xdp, cqe_bcnt);
+	xsk_buff_dma_sync_for_cpu(&mxbuf->xdp, rq->xsk_pool);
+	net_prefetch(mxbuf->xdp.data);
 
 	/* Possible flows:
 	 * - XDP_REDIRECT to XSKMAP:
@@ -269,7 +270,7 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 	 */
 
 	prog = rcu_dereference(rq->xdp_prog);
-	if (likely(prog && mlx5e_xdp_handle(rq, NULL, prog, xdp))) {
+	if (likely(prog && mlx5e_xdp_handle(rq, NULL, prog, mxbuf))) {
 		if (likely(__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)))
 			__set_bit(page_idx, wi->xdp_xmit_bitmap); /* non-atomic */
 		return NULL; /* page/packet was consumed by XDP */
@@ -278,14 +279,14 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 	/* XDP_PASS: copy the data from the UMEM to a new SKB and reuse the
 	 * frame. On SKB allocation failure, NULL is returned.
 	 */
-	return mlx5e_xsk_construct_skb(rq, xdp);
+	return mlx5e_xsk_construct_skb(rq, &mxbuf->xdp);
 }
 
 struct sk_buff *mlx5e_xsk_skb_from_cqe_linear(struct mlx5e_rq *rq,
 					      struct mlx5e_wqe_frag_info *wi,
 					      u32 cqe_bcnt)
 {
-	struct xdp_buff *xdp = wi->au->xsk;
+	struct mlx5e_xdp_buff *mxbuf = wi->au->mxbuf;
 	struct bpf_prog *prog;
 
 	/* wi->offset is not used in this function, because xdp->data and the
@@ -295,17 +296,17 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_linear(struct mlx5e_rq *rq,
 	 */
 	WARN_ON_ONCE(wi->offset);
 
-	xsk_buff_set_size(xdp, cqe_bcnt);
-	xsk_buff_dma_sync_for_cpu(xdp, rq->xsk_pool);
-	net_prefetch(xdp->data);
+	xsk_buff_set_size(&mxbuf->xdp, cqe_bcnt);
+	xsk_buff_dma_sync_for_cpu(&mxbuf->xdp, rq->xsk_pool);
+	net_prefetch(mxbuf->xdp.data);
 
 	prog = rcu_dereference(rq->xdp_prog);
-	if (likely(prog && mlx5e_xdp_handle(rq, NULL, prog, xdp)))
+	if (likely(prog && mlx5e_xdp_handle(rq, NULL, prog, mxbuf)))
 		return NULL; /* page/packet was consumed by XDP */
 
 	/* XDP_PASS: copy the data from the UMEM to a new SKB. The frame reuse
 	 * will be handled by mlx5e_free_rx_wqe.
 	 * On SKB allocation failure, NULL is returned.
 	 */
-	return mlx5e_xsk_construct_skb(rq, xdp);
+	return mlx5e_xsk_construct_skb(rq, &mxbuf->xdp);
 }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index c8820ab22169..c8a2b26de36e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -1576,10 +1576,10 @@ struct sk_buff *mlx5e_build_linear_skb(struct mlx5e_rq *rq, void *va,
 }
 
 static void mlx5e_fill_xdp_buff(struct mlx5e_rq *rq, void *va, u16 headroom,
-				u32 len, struct xdp_buff *xdp)
+				u32 len, struct mlx5e_xdp_buff *mxbuf)
 {
-	xdp_init_buff(xdp, rq->buff.frame0_sz, &rq->xdp_rxq);
-	xdp_prepare_buff(xdp, va, headroom, len, true);
+	xdp_init_buff(&mxbuf->xdp, rq->buff.frame0_sz, &rq->xdp_rxq);
+	xdp_prepare_buff(&mxbuf->xdp, va, headroom, len, true);
 }
 
 static struct sk_buff *
@@ -1606,16 +1606,16 @@ mlx5e_skb_from_cqe_linear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi,
 
 	prog = rcu_dereference(rq->xdp_prog);
 	if (prog) {
-		struct xdp_buff xdp;
+		struct mlx5e_xdp_buff mxbuf;
 
 		net_prefetchw(va); /* xdp_frame data area */
-		mlx5e_fill_xdp_buff(rq, va, rx_headroom, cqe_bcnt, &xdp);
-		if (mlx5e_xdp_handle(rq, au->page, prog, &xdp))
+		mlx5e_fill_xdp_buff(rq, va, rx_headroom, cqe_bcnt, &mxbuf);
+		if (mlx5e_xdp_handle(rq, au->page, prog, &mxbuf))
 			return NULL; /* page/packet was consumed by XDP */
 
-		rx_headroom = xdp.data - xdp.data_hard_start;
-		metasize = xdp.data - xdp.data_meta;
-		cqe_bcnt = xdp.data_end - xdp.data;
+		rx_headroom = mxbuf.xdp.data - mxbuf.xdp.data_hard_start;
+		metasize = mxbuf.xdp.data - mxbuf.xdp.data_meta;
+		cqe_bcnt = mxbuf.xdp.data_end - mxbuf.xdp.data;
 	}
 	frag_size = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt);
 	skb = mlx5e_build_linear_skb(rq, va, frag_size, rx_headroom, cqe_bcnt, metasize);
@@ -1637,9 +1637,9 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 	union mlx5e_alloc_unit *au = wi->au;
 	u16 rx_headroom = rq->buff.headroom;
 	struct skb_shared_info *sinfo;
+	struct mlx5e_xdp_buff mxbuf;
 	u32 frag_consumed_bytes;
 	struct bpf_prog *prog;
-	struct xdp_buff xdp;
 	struct sk_buff *skb;
 	dma_addr_t addr;
 	u32 truesize;
@@ -1654,8 +1654,8 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 	net_prefetchw(va); /* xdp_frame data area */
 	net_prefetch(va + rx_headroom);
 
-	mlx5e_fill_xdp_buff(rq, va, rx_headroom, frag_consumed_bytes, &xdp);
-	sinfo = xdp_get_shared_info_from_buff(&xdp);
+	mlx5e_fill_xdp_buff(rq, va, rx_headroom, frag_consumed_bytes, &mxbuf);
+	sinfo = xdp_get_shared_info_from_buff(&mxbuf.xdp);
 	truesize = 0;
 
 	cqe_bcnt -= frag_consumed_bytes;
@@ -1673,13 +1673,13 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 		dma_sync_single_for_cpu(rq->pdev, addr + wi->offset,
 					frag_consumed_bytes, rq->buff.map_dir);
 
-		if (!xdp_buff_has_frags(&xdp)) {
+		if (!xdp_buff_has_frags(&mxbuf.xdp)) {
 			/* Init on the first fragment to avoid cold cache access
 			 * when possible.
 			 */
 			sinfo->nr_frags = 0;
 			sinfo->xdp_frags_size = 0;
-			xdp_buff_set_frags_flag(&xdp);
+			xdp_buff_set_frags_flag(&mxbuf.xdp);
 		}
 
 		frag = &sinfo->frags[sinfo->nr_frags++];
@@ -1688,7 +1688,7 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 		skb_frag_size_set(frag, frag_consumed_bytes);
 
 		if (page_is_pfmemalloc(au->page))
-			xdp_buff_set_frag_pfmemalloc(&xdp);
+			xdp_buff_set_frag_pfmemalloc(&mxbuf.xdp);
 
 		sinfo->xdp_frags_size += frag_consumed_bytes;
 		truesize += frag_info->frag_stride;
@@ -1701,7 +1701,7 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 	au = head_wi->au;
 
 	prog = rcu_dereference(rq->xdp_prog);
-	if (prog && mlx5e_xdp_handle(rq, au->page, prog, &xdp)) {
+	if (prog && mlx5e_xdp_handle(rq, au->page, prog, &mxbuf)) {
 		if (test_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
 			int i;
 
@@ -1711,22 +1711,22 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 		return NULL; /* page/packet was consumed by XDP */
 	}
 
-	skb = mlx5e_build_linear_skb(rq, xdp.data_hard_start, rq->buff.frame0_sz,
-				     xdp.data - xdp.data_hard_start,
-				     xdp.data_end - xdp.data,
-				     xdp.data - xdp.data_meta);
+	skb = mlx5e_build_linear_skb(rq, mxbuf.xdp.data_hard_start, rq->buff.frame0_sz,
+				     mxbuf.xdp.data - mxbuf.xdp.data_hard_start,
+				     mxbuf.xdp.data_end - mxbuf.xdp.data,
+				     mxbuf.xdp.data - mxbuf.xdp.data_meta);
 	if (unlikely(!skb))
 		return NULL;
 
 	page_ref_inc(au->page);
 
-	if (unlikely(xdp_buff_has_frags(&xdp))) {
+	if (unlikely(xdp_buff_has_frags(&mxbuf.xdp))) {
 		int i;
 
 		/* sinfo->nr_frags is reset by build_skb, calculate again. */
 		xdp_update_skb_shared_info(skb, wi - head_wi - 1,
 					   sinfo->xdp_frags_size, truesize,
-					   xdp_buff_is_frag_pfmemalloc(&xdp));
+					   xdp_buff_is_frag_pfmemalloc(&mxbuf.xdp));
 
 		for (i = 0; i < sinfo->nr_frags; i++) {
 			skb_frag_t *frag = &sinfo->frags[i];
@@ -2007,19 +2007,19 @@ mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
 
 	prog = rcu_dereference(rq->xdp_prog);
 	if (prog) {
-		struct xdp_buff xdp;
+		struct mlx5e_xdp_buff mxbuf;
 
 		net_prefetchw(va); /* xdp_frame data area */
-		mlx5e_fill_xdp_buff(rq, va, rx_headroom, cqe_bcnt, &xdp);
-		if (mlx5e_xdp_handle(rq, au->page, prog, &xdp)) {
+		mlx5e_fill_xdp_buff(rq, va, rx_headroom, cqe_bcnt, &mxbuf);
+		if (mlx5e_xdp_handle(rq, au->page, prog, &mxbuf)) {
 			if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags))
 				__set_bit(page_idx, wi->xdp_xmit_bitmap); /* non-atomic */
 			return NULL; /* page/packet was consumed by XDP */
 		}
 
-		rx_headroom = xdp.data - xdp.data_hard_start;
-		metasize = xdp.data - xdp.data_meta;
-		cqe_bcnt = xdp.data_end - xdp.data;
+		rx_headroom = mxbuf.xdp.data - mxbuf.xdp.data_hard_start;
+		metasize = mxbuf.xdp.data - mxbuf.xdp.data_meta;
+		cqe_bcnt = mxbuf.xdp.data_end - mxbuf.xdp.data;
 	}
 	frag_size = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt);
 	skb = mlx5e_build_linear_skb(rq, va, frag_size, rx_headroom, cqe_bcnt, metasize);
-- 
2.39.0.314.g84b9a713c41-goog


  parent reply	other threads:[~2023-01-04 22:01 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-04 21:59 [PATCH bpf-next v6 00/17] xdp: hints via kfuncs Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 01/17] bpf: Document XDP RX metadata Stanislav Fomichev
2023-01-06 15:09   ` David Vernet
2023-01-04 21:59 ` [PATCH bpf-next v6 02/17] bpf: Rename bpf_{prog,map}_is_dev_bound to is_offloaded Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 03/17] bpf: Move offload initialization into late_initcall Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 04/17] bpf: Reshuffle some parts of bpf/offload.c Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 05/17] bpf: Introduce device-bound XDP programs Stanislav Fomichev
2023-01-06  0:41   ` Martin KaFai Lau
2023-01-06 17:17     ` Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 06/17] selftests/bpf: Update expected test_offload.py messages Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 07/17] bpf: XDP metadata RX kfuncs Stanislav Fomichev
2023-01-06  0:47   ` Martin KaFai Lau
2023-01-06 17:17     ` Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 08/17] bpf: Support consuming XDP HW metadata from fext programs Stanislav Fomichev
2023-01-06  0:57   ` Martin KaFai Lau
2023-01-06 17:17     ` Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 09/17] veth: Introduce veth_xdp_buff wrapper for xdp_buff Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 10/17] veth: Support RX XDP metadata Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 11/17] selftests/bpf: Verify xdp_metadata xdp->af_xdp path Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 12/17] net/mlx4_en: Introduce wrapper for xdp_buff Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 13/17] net/mlx4_en: Support RX XDP metadata Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 14/17] xsk: Add cb area to struct xdp_buff_xsk Stanislav Fomichev
2023-01-04 21:59 ` Stanislav Fomichev [this message]
2023-01-08  7:38   ` [PATCH bpf-next v6 15/17] net/mlx5e: Introduce wrapper for xdp_buff Tariq Toukan
2023-01-09 22:44     ` Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 16/17] net/mlx5e: Support RX XDP metadata Stanislav Fomichev
2023-01-06  1:08   ` Martin KaFai Lau
2023-01-08  7:38   ` Tariq Toukan
2023-01-09 22:44     ` Stanislav Fomichev
2023-01-04 21:59 ` [PATCH bpf-next v6 17/17] selftests/bpf: Simple program to dump XDP RX metadata Stanislav Fomichev

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