diff mbox series

[net-next,04/11] net/mlx5e: TC, Offload rewrite and mirror to both internal and external dests

Message ID 20240806125804.2048753-5-tariqt@nvidia.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series mlx5 misc patches 2024-08-06 | 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: 29 this patch: 29
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: 29 this patch: 29
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: 29 this patch: 29
netdev/checkpatch warning WARNING: line length of 84 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-2024-08-06--21-00 (tests: 707)

Commit Message

Tariq Toukan Aug. 6, 2024, 12:57 p.m. UTC 
From: Jianbo Liu <jianbol@nvidia.com>

Firmware has the limitation that it cannot offload a rule with rewrite
and mirror to internal and external destinations simultaneously.

This patch adds a workaround to this issue. Here the destination array
is split again, just like what's done in previous commit, but after
the action indexed by split_count - 1. An extra rule is added for the
leftover destinations. Such rule can be offloaded, even there are
destinations to both internal and external destinations, because the
header rewrite is left in the original FTE.

Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index a28bf05d98f1..6b3b1afe8312 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1742,12 +1742,17 @@  has_encap_dests(struct mlx5_flow_attr *attr)
 static int
 extra_split_attr_dests_needed(struct mlx5e_tc_flow *flow, struct mlx5_flow_attr *attr)
 {
+	bool int_dest = false, ext_dest = false;
 	struct mlx5_esw_flow_attr *esw_attr;
+	int i;
 
 	if (flow->attr != attr ||
 	    !list_is_first(&attr->list, &flow->attrs))
 		return 0;
 
+	if (flow_flag_test(flow, SLOW))
+		return 0;
+
 	esw_attr = attr->esw_attr;
 	if (!esw_attr->split_count ||
 	    esw_attr->split_count == esw_attr->out_count - 1)
@@ -1758,6 +1763,18 @@  extra_split_attr_dests_needed(struct mlx5e_tc_flow *flow, struct mlx5_flow_attr
 	     MLX5_ESW_DEST_CHAIN_WITH_SRC_PORT_CHANGE))
 		return esw_attr->split_count + 1;
 
+	for (i = esw_attr->split_count; i < esw_attr->out_count; i++) {
+		/* external dest with encap is considered as internal by firmware */
+		if (esw_attr->dests[i].vport == MLX5_VPORT_UPLINK &&
+		    !(esw_attr->dests[i].flags & MLX5_ESW_DEST_ENCAP_VALID))
+			ext_dest = true;
+		else
+			int_dest = true;
+
+		if (ext_dest && int_dest)
+			return esw_attr->split_count;
+	}
+
 	return 0;
 }