diff mbox series

[net-next,12/12] net/mlx5e: SHAMPO, Rework header allocation loop

Message ID 20241107194357.683732-13-tariqt@nvidia.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series mlx5 esw qos refactor and SHAMPO cleanup | 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: 3 this patch: 3
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: linux-rdma@vger.kernel.org
netdev/build_clang success Errors and warnings before: 3 this patch: 3
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: 4 this patch: 4
netdev/checkpatch warning WARNING: line length of 84 exceeds 80 columns WARNING: line length of 92 exceeds 80 columns
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 success Was 0 now: 0
netdev/contest success net-next-2024-11-08--06-00 (tests: 783)

Commit Message

Tariq Toukan Nov. 7, 2024, 7:43 p.m. UTC 
From: Dragos Tatulea <dtatulea@nvidia.com>

The current loop code was based on the assumption
that there can be page leftovers from previous function calls.

This patch changes the allocation loop to make it clearer how
pages get allocated every MLX5E_SHAMPO_WQ_HEADER_PER_PAGE headers.
This change has no functional implications.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_rx.c   | 32 ++++++++++---------
 1 file changed, 17 insertions(+), 15 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 3de575875586..1963bc5adb18 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -666,8 +666,7 @@  static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq,
 	u16 pi, header_offset, err, wqe_bbs;
 	u32 lkey = rq->mdev->mlx5e_res.hw_objs.mkey;
 	struct mlx5e_umr_wqe *umr_wqe;
-	int headroom, i;
-	u64 addr = 0;
+	int headroom, i = 0;
 
 	headroom = rq->buff.headroom;
 	wqe_bbs = MLX5E_KSM_UMR_WQEBBS(ksm_entries);
@@ -676,22 +675,25 @@  static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq,
 	build_ksm_umr(sq, umr_wqe, shampo->key, index, ksm_entries);
 
 	WARN_ON_ONCE(ksm_entries & (MLX5E_SHAMPO_WQ_HEADER_PER_PAGE - 1));
-	for (i = 0; i < ksm_entries; i++, index++) {
-		header_offset = mlx5e_shampo_hd_offset(index);
-		if (!header_offset) {
-			struct mlx5e_frag_page *frag_page = mlx5e_shampo_hd_to_frag_page(rq, index);
+	while (i < ksm_entries) {
+		struct mlx5e_frag_page *frag_page = mlx5e_shampo_hd_to_frag_page(rq, index);
+		u64 addr;
+
+		err = mlx5e_page_alloc_fragmented(rq, frag_page);
+		if (unlikely(err))
+			goto err_unmap;
 
-			err = mlx5e_page_alloc_fragmented(rq, frag_page);
-			if (unlikely(err))
-				goto err_unmap;
 
-			addr = page_pool_get_dma_addr(frag_page->page);
-		}
+		addr = page_pool_get_dma_addr(frag_page->page);
 
-		umr_wqe->inline_ksms[i] = (struct mlx5_ksm) {
-			.key = cpu_to_be32(lkey),
-			.va  = cpu_to_be64(addr + header_offset + headroom),
-		};
+		for (int j = 0; j < MLX5E_SHAMPO_WQ_HEADER_PER_PAGE; j++) {
+			header_offset = mlx5e_shampo_hd_offset(index++);
+
+			umr_wqe->inline_ksms[i++] = (struct mlx5_ksm) {
+				.key = cpu_to_be32(lkey),
+				.va  = cpu_to_be64(addr + header_offset + headroom),
+			};
+		}
 	}
 
 	sq->db.wqe_info[pi] = (struct mlx5e_icosq_wqe_info) {