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From:   Oleksandr Mazur <oleksandr.mazur@plvision.eu>
To:     netdev@vger.kernel.org, Taras Chornyi <tchornyi@marvell.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>, linux-kernel@vger.kernel.org
Cc:     Oleksandr Mazur <oleksandr.mazur@plvision.eu>,
        Yevhen Orlov <yevhen.orlov@plvision.eu>
Subject: [PATCH V2 net-next 2/4] net: marvell: prestera: define MDB/flood domain entries and HW API to offload them to the HW
Date:   Fri, 17 Jun 2022 13:15:18 +0300
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Define MDB entry that can be offloaded:
  - FDB entry, that defines an multicast group to which traffic can be
    replicated to;
Define flood domain:
  - Arrangement of ports (list), that have joined multicast group, which
    would receive and replicate to multicast traffic of specified group;
Define flood domain port:
  - single flood domain list entry, that is associated with any given
    bridge port interface (could be LAG interface or physical port-member).
    Applicable to both Q and D bridges;

Co-developed-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
---
 .../net/ethernet/marvell/prestera/prestera.h  | 22 ++++++
 .../ethernet/marvell/prestera/prestera_hw.c   | 72 +++++++++++++++++++
 .../ethernet/marvell/prestera/prestera_hw.h   | 11 +++
 .../ethernet/marvell/prestera/prestera_main.c | 24 +++++++
 4 files changed, 129 insertions(+)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera.h b/drivers/net/ethernet/marvell/prestera/prestera.h
index 837e7a3b361b..9c7d59fbbc83 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera.h
@@ -20,6 +20,26 @@ struct prestera_fw_rev {
 	u16 sub;
 };
 
+struct prestera_flood_domain {
+	struct prestera_switch *sw;
+	struct list_head flood_domain_port_list;
+	u32 idx;
+};
+
+struct prestera_mdb_entry {
+	struct prestera_switch *sw;
+	struct prestera_flood_domain *flood_domain;
+	unsigned char addr[ETH_ALEN];
+	u16 vid;
+};
+
+struct prestera_flood_domain_port {
+	struct prestera_flood_domain *flood_domain;
+	struct net_device *dev;
+	struct list_head flood_domain_port_node;
+	u16 vid;
+};
+
 struct prestera_port_stats {
 	u64 good_octets_received;
 	u64 bad_octets_received;
@@ -341,6 +361,8 @@ bool prestera_netdev_check(const struct net_device *dev);
 int prestera_is_valid_mac_addr(struct prestera_port *port, const u8 *addr);
 
 bool prestera_port_is_lag_member(const struct prestera_port *port);
+int prestera_lag_id(struct prestera_switch *sw,
+		    struct net_device *lag_dev, u16 *lag_id);
 
 struct prestera_lag *prestera_lag_by_id(struct prestera_switch *sw, u16 id);
 
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
index b00e69fabc6b..577d3c1d76d7 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
@@ -60,6 +60,14 @@ enum prestera_cmd_type_t {
 	PRESTERA_CMD_TYPE_ROUTER_VR_CREATE = 0x630,
 	PRESTERA_CMD_TYPE_ROUTER_VR_DELETE = 0x631,
 
+	PRESTERA_CMD_TYPE_FLOOD_DOMAIN_CREATE = 0x700,
+	PRESTERA_CMD_TYPE_FLOOD_DOMAIN_DESTROY = 0x701,
+	PRESTERA_CMD_TYPE_FLOOD_DOMAIN_PORTS_SET = 0x702,
+	PRESTERA_CMD_TYPE_FLOOD_DOMAIN_PORTS_RESET = 0x703,
+
+	PRESTERA_CMD_TYPE_MDB_CREATE = 0x704,
+	PRESTERA_CMD_TYPE_MDB_DESTROY = 0x705,
+
 	PRESTERA_CMD_TYPE_RXTX_INIT = 0x800,
 
 	PRESTERA_CMD_TYPE_LAG_MEMBER_ADD = 0x900,
@@ -185,6 +193,12 @@ struct prestera_fw_event_handler {
 	void *arg;
 };
 
+enum {
+	PRESTERA_HW_FLOOD_DOMAIN_PORT_TYPE_REG_PORT = 0,
+	PRESTERA_HW_FLOOD_DOMAIN_PORT_TYPE_LAG = 1,
+	PRESTERA_HW_FLOOD_DOMAIN_PORT_TYPE_MAX = 2,
+};
+
 struct prestera_msg_cmd {
 	__le32 type;
 };
@@ -627,6 +641,57 @@ struct prestera_msg_event_fdb {
 	u8 dest_type;
 };
 
+struct prestera_msg_flood_domain_create_req {
+	struct prestera_msg_cmd cmd;
+};
+
+struct prestera_msg_flood_domain_create_resp {
+	struct prestera_msg_ret ret;
+	__le32 flood_domain_idx;
+};
+
+struct prestera_msg_flood_domain_destroy_req {
+	struct prestera_msg_cmd cmd;
+	__le32 flood_domain_idx;
+};
+
+struct prestera_msg_flood_domain_ports_set_req {
+	struct prestera_msg_cmd cmd;
+	__le32 flood_domain_idx;
+	__le32 ports_num;
+};
+
+struct prestera_msg_flood_domain_ports_reset_req {
+	struct prestera_msg_cmd cmd;
+	__le32 flood_domain_idx;
+};
+
+struct prestera_msg_flood_domain_port {
+	union {
+		struct {
+			__le32 port_num;
+			__le32 dev_num;
+		};
+		__le16 lag_id;
+	};
+	__le16 vid;
+	__le16 port_type;
+};
+
+struct prestera_msg_mdb_create_req {
+	struct prestera_msg_cmd cmd;
+	__le32 flood_domain_idx;
+	__le16 vid;
+	u8 mac[ETH_ALEN];
+};
+
+struct prestera_msg_mdb_destroy_req {
+	struct prestera_msg_cmd cmd;
+	__le32 flood_domain_idx;
+	__le16 vid;
+	u8 mac[ETH_ALEN];
+};
+
 static void prestera_hw_build_tests(void)
 {
 	/* check requests */
@@ -654,10 +719,17 @@ static void prestera_hw_build_tests(void)
 	BUILD_BUG_ON(sizeof(struct prestera_msg_vr_req) != 8);
 	BUILD_BUG_ON(sizeof(struct prestera_msg_lpm_req) != 36);
 	BUILD_BUG_ON(sizeof(struct prestera_msg_policer_req) != 36);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_flood_domain_create_req) != 4);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_flood_domain_destroy_req) != 8);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_flood_domain_ports_set_req) != 12);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_flood_domain_ports_reset_req) != 8);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_mdb_create_req) != 16);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_mdb_destroy_req) != 16);
 
 	/*  structure that are part of req/resp fw messages */
 	BUILD_BUG_ON(sizeof(struct prestera_msg_iface) != 16);
 	BUILD_BUG_ON(sizeof(struct prestera_msg_ip_addr) != 20);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_flood_domain_port) != 12);
 
 	/* check responses */
 	BUILD_BUG_ON(sizeof(struct prestera_msg_common_resp) != 8);
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.h b/drivers/net/ethernet/marvell/prestera/prestera_hw.h
index 3eb99eb8c2da..838c02bd55fb 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.h
@@ -143,6 +143,8 @@ struct prestera_acl_hw_action_info;
 struct prestera_acl_iface;
 struct prestera_counter_stats;
 struct prestera_iface;
+struct prestera_flood_domain;
+struct prestera_mdb_entry;
 
 /* Switch API */
 int prestera_hw_switch_init(struct prestera_switch *sw);
@@ -301,4 +303,13 @@ int prestera_hw_policer_release(struct prestera_switch *sw,
 int prestera_hw_policer_sr_tcm_set(struct prestera_switch *sw,
 				   u32 policer_id, u64 cir, u32 cbs);
 
+/* Flood domain / MDB API */
+int prestera_hw_flood_domain_create(struct prestera_flood_domain *domain);
+int prestera_hw_flood_domain_destroy(struct prestera_flood_domain *domain);
+int prestera_hw_flood_domain_ports_set(struct prestera_flood_domain *domain);
+int prestera_hw_flood_domain_ports_reset(struct prestera_flood_domain *domain);
+
+int prestera_hw_mdb_create(struct prestera_mdb_entry *mdb);
+int prestera_hw_mdb_destroy(struct prestera_mdb_entry *mdb);
+
 #endif /* _PRESTERA_HW_H_ */
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c b/drivers/net/ethernet/marvell/prestera/prestera_main.c
index 0e8eecbe13e1..4b95ef393b6e 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_main.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c
@@ -600,6 +600,30 @@ static struct prestera_lag *prestera_lag_by_dev(struct prestera_switch *sw,
 	return NULL;
 }
 
+int prestera_lag_id(struct prestera_switch *sw,
+		    struct net_device *lag_dev, u16 *lag_id)
+{
+	struct prestera_lag *lag;
+	int free_id = -1;
+	int id;
+
+	for (id = 0; id < sw->lag_max; id++) {
+		lag = prestera_lag_by_id(sw, id);
+		if (lag->member_count) {
+			if (lag->dev == lag_dev) {
+				*lag_id = id;
+				return 0;
+			}
+		} else if (free_id < 0) {
+			free_id = id;
+		}
+	}
+	if (free_id < 0)
+		return -ENOSPC;
+	*lag_id = free_id;
+	return 0;
+}
+
 static struct prestera_lag *prestera_lag_create(struct prestera_switch *sw,
 						struct net_device *lag_dev)
 {
-- 
2.17.1