diff mbox series

[v5,net-nex,5/5] net: mlx5: add xdp tx return bulking support

Message ID 0e898e7f201e65bdf4d9457f9ad4997d8e52dd4c.1605020963.git.lorenzo@kernel.org (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series xdp: introduce bulking for page_pool tx return path | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present fail Series targets non-next tree, but doesn't contain any Fixes tags
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for net
netdev/subject_prefix success Link
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 74 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Lorenzo Bianconi Nov. 10, 2020, 3:38 p.m. UTC 
Convert mlx5 driver to xdp_return_frame_bulk APIs.

XDP_REDIRECT (upstream codepath): 8.9Mpps
XDP_REDIRECT (upstream codepath + bulking APIs): 10.2Mpps

Co-developed-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  | 22 +++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

Comments

Jesper Dangaard Brouer Nov. 10, 2020, 4:19 p.m. UTC | #1 
On Tue, 10 Nov 2020 16:38:00 +0100
Lorenzo Bianconi <lorenzo@kernel.org> wrote:

> Convert mlx5 driver to xdp_return_frame_bulk APIs.
> 
> XDP_REDIRECT (upstream codepath): 8.9Mpps
> XDP_REDIRECT (upstream codepath + bulking APIs): 10.2Mpps
> 
> Co-developed-by: Jesper Dangaard Brouer <brouer@redhat.com>
> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>

I did most of my testing on this driver:

Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index ae90d533a350..2e3e78b0f333 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -366,7 +366,8 @@  mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd,
 static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
 				  struct mlx5e_xdp_wqe_info *wi,
 				  u32 *xsk_frames,
-				  bool recycle)
+				  bool recycle,
+				  struct xdp_frame_bulk *bq)
 {
 	struct mlx5e_xdp_info_fifo *xdpi_fifo = &sq->db.xdpi_fifo;
 	u16 i;
@@ -379,7 +380,7 @@  static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
 			/* XDP_TX from the XSK RQ and XDP_REDIRECT */
 			dma_unmap_single(sq->pdev, xdpi.frame.dma_addr,
 					 xdpi.frame.xdpf->len, DMA_TO_DEVICE);
-			xdp_return_frame(xdpi.frame.xdpf);
+			xdp_return_frame_bulk(xdpi.frame.xdpf, bq);
 			break;
 		case MLX5E_XDP_XMIT_MODE_PAGE:
 			/* XDP_TX from the regular RQ */
@@ -397,12 +398,15 @@  static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
 
 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
 {
+	struct xdp_frame_bulk bq;
 	struct mlx5e_xdpsq *sq;
 	struct mlx5_cqe64 *cqe;
 	u32 xsk_frames = 0;
 	u16 sqcc;
 	int i;
 
+	xdp_frame_bulk_init(&bq);
+
 	sq = container_of(cq, struct mlx5e_xdpsq, cq);
 
 	if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
@@ -434,7 +438,7 @@  bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
 
 			sqcc += wi->num_wqebbs;
 
-			mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, true);
+			mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, true, &bq);
 		} while (!last_wqe);
 
 		if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) {
@@ -447,6 +451,8 @@  bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
 		}
 	} while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
 
+	xdp_flush_frame_bulk(&bq);
+
 	if (xsk_frames)
 		xsk_tx_completed(sq->xsk_pool, xsk_frames);
 
@@ -463,8 +469,13 @@  bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
 
 void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
 {
+	struct xdp_frame_bulk bq;
 	u32 xsk_frames = 0;
 
+	xdp_frame_bulk_init(&bq);
+
+	rcu_read_lock(); /* need for xdp_return_frame_bulk */
+
 	while (sq->cc != sq->pc) {
 		struct mlx5e_xdp_wqe_info *wi;
 		u16 ci;
@@ -474,9 +485,12 @@  void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
 
 		sq->cc += wi->num_wqebbs;
 
-		mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, false);
+		mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, false, &bq);
 	}
 
+	xdp_flush_frame_bulk(&bq);
+	rcu_read_unlock();
+
 	if (xsk_frames)
 		xsk_tx_completed(sq->xsk_pool, xsk_frames);
 }