net: marvell: prestera: define MDB/flood domain entries and HW API to offload them to the HW

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

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;
@@ -342,6 +362,8 @@ 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);
 

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);
@@ -2194,3 +2266,133 @@ int prestera_hw_policer_sr_tcm_set(struct prestera_switch *sw,
 	return prestera_cmd(sw, PRESTERA_CMD_TYPE_POLICER_SET,
 			    &req.cmd, sizeof(req));
 }
+
+int prestera_hw_flood_domain_create(struct prestera_flood_domain *domain)
+{
+	struct prestera_msg_flood_domain_create_resp resp;
+	struct prestera_msg_flood_domain_create_req req;
+	int err;
+
+	err = prestera_cmd_ret(domain->sw,
+			       PRESTERA_CMD_TYPE_FLOOD_DOMAIN_CREATE, &req.cmd,
+			       sizeof(req), &resp.ret, sizeof(resp));
+	if (err)
+		return err;
+
+	domain->idx = __le32_to_cpu(resp.flood_domain_idx);
+
+	return 0;
+}
+
+int prestera_hw_flood_domain_destroy(struct prestera_flood_domain *domain)
+{
+	struct prestera_msg_flood_domain_destroy_req req = {
+		.flood_domain_idx = __cpu_to_le32(domain->idx),
+	};
+
+	return prestera_cmd(domain->sw, PRESTERA_CMD_TYPE_FLOOD_DOMAIN_DESTROY,
+			   &req.cmd, sizeof(req));
+}
+
+int prestera_hw_flood_domain_ports_set(struct prestera_flood_domain *domain)
+{
+	struct prestera_flood_domain_port *flood_domain_port;
+	struct prestera_msg_flood_domain_ports_set_req *req;
+	struct prestera_msg_flood_domain_port *ports;
+	struct prestera_switch *sw = domain->sw;
+	struct prestera_port *port;
+	u32 ports_num = 0;
+	int buf_size;
+	void *buff;
+	u16 lag_id;
+	int err;
+
+	list_for_each_entry(flood_domain_port, &domain->flood_domain_port_list,
+			    flood_domain_port_node)
+		ports_num++;
+
+	if (!ports_num)
+		return -EINVAL;
+
+	buf_size = sizeof(*req) + sizeof(*ports) * ports_num;
+
+	buff = kmalloc(buf_size, GFP_KERNEL);
+	if (!buff)
+		return -ENOMEM;
+
+	req = buff;
+	ports = buff + sizeof(*req);
+
+	req->flood_domain_idx = __cpu_to_le32(domain->idx);
+	req->ports_num = __cpu_to_le32(ports_num);
+
+	list_for_each_entry(flood_domain_port, &domain->flood_domain_port_list,
+			    flood_domain_port_node) {
+		if (netif_is_lag_master(flood_domain_port->dev)) {
+			if (prestera_lag_id(sw, flood_domain_port->dev,
+					    &lag_id)) {
+				kfree(buff);
+				return -EINVAL;
+			}
+
+			ports->port_type =
+				__cpu_to_le16(PRESTERA_HW_FLOOD_DOMAIN_PORT_TYPE_LAG);
+			ports->lag_id = __cpu_to_le16(lag_id);
+		} else {
+			port = prestera_port_dev_lower_find(flood_domain_port->dev);
+
+			ports->port_type =
+				__cpu_to_le16(PRESTERA_HW_FDB_ENTRY_TYPE_REG_PORT);
+			ports->dev_num = __cpu_to_le32(port->dev_id);
+			ports->port_num = __cpu_to_le32(port->hw_id);
+		}
+
+		ports->vid = __cpu_to_le16(flood_domain_port->vid);
+
+		ports++;
+	}
+
+	err = prestera_cmd(sw, PRESTERA_CMD_TYPE_FLOOD_DOMAIN_PORTS_SET,
+			   &req->cmd, buf_size);
+
+	kfree(buff);
+
+	return err;
+}
+
+int prestera_hw_flood_domain_ports_reset(struct prestera_flood_domain *domain)
+{
+	struct prestera_msg_flood_domain_ports_reset_req req = {
+		.flood_domain_idx = __cpu_to_le32(domain->idx),
+	};
+
+	return prestera_cmd(domain->sw,
+			   PRESTERA_CMD_TYPE_FLOOD_DOMAIN_PORTS_RESET, &req.cmd,
+			   sizeof(req));
+}
+
+int prestera_hw_mdb_create(struct prestera_mdb_entry *mdb)
+{
+	struct prestera_msg_mdb_create_req req = {
+		.flood_domain_idx = __cpu_to_le32(mdb->flood_domain->idx),
+		.vid = __cpu_to_le16(mdb->vid),
+	};
+
+	memcpy(req.mac, mdb->addr, ETH_ALEN);
+
+	return prestera_cmd(mdb->sw, PRESTERA_CMD_TYPE_MDB_CREATE, &req.cmd,
+			    sizeof(req));
+}
+
+int prestera_hw_mdb_destroy(struct prestera_mdb_entry *mdb)
+{
+	struct prestera_msg_mdb_destroy_req req = {
+		.flood_domain_idx = __cpu_to_le32(mdb->flood_domain->idx),
+		.vid = __cpu_to_le16(mdb->vid),
+	};
+
+	memcpy(req.mac, mdb->addr, ETH_ALEN);
+
+	return prestera_cmd(mdb->sw, PRESTERA_CMD_TYPE_MDB_DESTROY, &req.cmd,
+			    sizeof(req));
+}

drivers/net/ethernet/marvell/prestera/prestera_hw.h

@@ -144,6 +144,8 @@ 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);
@@ -302,4 +304,13 @@ 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_ */

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)
 {