[PATCH net-next 10/13] net/mlx5: SD, keep netdev resources on same PF in switchdev mode

[Tariq Toukan]

From: Shay Drory <shayd@xxxxxxxxxx>

In SD switchdev mode, network device resources such as channels and
completion vectors must remain on the same PF rather than being
distributed across SD group members.

Modify mlx5_sd_ch_ix_get_dev_ix() to return 0 and
mlx5_sd_ch_ix_get_vec_ix() to return the channel index directly when
in switchdev mode, keeping resources local to the requesting PF.

Signed-off-by: Shay Drory <shayd@xxxxxxxxxx>
Reviewed-by: Mark Bloch <mbloch@xxxxxxxxxx>
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c
index 8991db3a19cf..ec606851feb8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c
@@ -6,6 +6,7 @@
 #include "mlx5_core.h"
 #include "lib/mlx5.h"
 #include "fs_cmd.h"
+#include <linux/mlx5/eswitch.h>
 #include <linux/mlx5/vport.h>
 #include <linux/debugfs.h>
 
@@ -85,11 +86,17 @@ mlx5_sd_primary_get_peer(struct mlx5_core_dev *primary, int idx)
 
 int mlx5_sd_ch_ix_get_dev_ix(struct mlx5_core_dev *dev, int ch_ix)
 {
+	if (is_mdev_switchdev_mode(dev))
+		return 0;
+
 	return ch_ix % mlx5_sd_get_host_buses(dev);
 }
 
 int mlx5_sd_ch_ix_get_vec_ix(struct mlx5_core_dev *dev, int ch_ix)
 {
+	if (is_mdev_switchdev_mode(dev))
+		return ch_ix;
+
 	return ch_ix / mlx5_sd_get_host_buses(dev);
 }
 
-- 
2.44.0