sonic-buildimage/platform/mellanox/non-upstream-patches/patches/0156-mlxsw-minimal-Add-interfaces-for-line-card-initializ.patch

From 933a623916a00d83616d653a82329750d94de0f1 Mon Sep 17 00:00:00 2001
From: Vadim Pasternak <vadimp@nvidia.com>
Date: Sun, 19 Dec 2021 09:40:34 +0000
Subject: [PATCH backport 5.10 156/182] mlxsw: minimal: Add interfaces for line
 card initialization and de-initialization

Add callback functions for line card 'netdevice' objects initialization
and de-initialization. Each line card is associated with the set of
'netdevices', which are created/destroyed dynamically, when line card
is getting to active / inactive states.

Add APIs for line card registration and de-registration during init and
de-init.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/minimal.c | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/minimal.c b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
index 27afb28e439f..0b605c6aa637 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/minimal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
@@ -549,6 +549,69 @@ static void mlxsw_m_sys_event_handler(struct mlxsw_core *mlxsw_core)
 	}
 }
 
+static void
+mlxsw_m_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index,
+		   const struct mlxsw_linecard *linecard, void *priv)
+{
+	struct mlxsw_m *mlxsw_m = priv;
+	int err;
+
+	err = mlxsw_m_ports_create(mlxsw_m, slot_index);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Failed to set line card at slot %d\n",
+			slot_index);
+		goto mlxsw_m_ports_create_fail;
+	}
+	mlxsw_m->line_cards[slot_index]->active = true;
+
+mlxsw_m_ports_create_fail:
+	return;
+}
+
+static void
+mlxsw_m_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index,
+		     const struct mlxsw_linecard *linecard, void *priv)
+{
+	struct mlxsw_m *mlxsw_m = priv;
+
+	mlxsw_m_ports_remove(mlxsw_m, slot_index);
+	mlxsw_m->line_cards[slot_index]->active = false;
+}
+
+static struct mlxsw_linecards_event_ops mlxsw_m_event_ops = {
+	.got_active = mlxsw_m_got_active,
+	.got_inactive = mlxsw_m_got_inactive,
+};
+
+static int mlxsw_m_linecards_register(struct mlxsw_m *mlxsw_m)
+{
+	struct mlxsw_linecards *linecards = mlxsw_core_linecards(mlxsw_m->core);
+
+	if (!linecards || !linecards->count)
+		return 0;
+
+	return mlxsw_linecards_event_ops_register(mlxsw_m->core,
+						  &mlxsw_m_event_ops,
+						  mlxsw_m);
+}
+
+static void mlxsw_m_linecards_unregister(struct mlxsw_m *mlxsw_m)
+{
+	struct mlxsw_linecards *linecards = mlxsw_core_linecards(mlxsw_m->core);
+	int i;
+
+	if (!linecards || !linecards->count)
+		return;
+
+	for (i = 1; i <= linecards->count; i++) {
+		if (mlxsw_m->line_cards[i]->active)
+			mlxsw_m_got_inactive(mlxsw_m->core, i, NULL, mlxsw_m);
+	}
+
+	mlxsw_linecards_event_ops_unregister(mlxsw_m->core,
+					     &mlxsw_m_event_ops, mlxsw_m);
+}
+
 static int mlxsw_m_init(struct mlxsw_core *mlxsw_core,
 			const struct mlxsw_bus_info *mlxsw_bus_info,
 			struct netlink_ext_ack *extack)
@@ -587,8 +650,14 @@ static int mlxsw_m_init(struct mlxsw_core *mlxsw_core,
 		goto err_mlxsw_m_ports_create;
 	}
 
+	err = mlxsw_m_linecards_register(mlxsw_m);
+	if (err)
+		goto err_linecards_register;
+
 	return 0;
 
+err_linecards_register:
+	mlxsw_m_ports_remove(mlxsw_m, 0);
 err_mlxsw_m_ports_create:
 	mlxsw_m_line_cards_free(mlxsw_m);
 	return err;
@@ -598,6 +667,7 @@ static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core)
 {
 	struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
 
+	mlxsw_m_linecards_unregister(mlxsw_m);
 	mlxsw_m_ports_remove(mlxsw_m, 0);
 	mlxsw_m_line_cards_free(mlxsw_m);
 }
-- 
2.20.1