dpaa2-switch: trap STP frames to the CPU

Add an ACL entry in each port's ACL table to redirect any frame that
has the destination MAC address equal to the STP dmac to the control
interface.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpsw.h b/drivers/net/ethernet/freescale/dpaa2/dpsw.h
index 35b4749cdcdb..08e37c475ae8 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpsw.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpsw.h
@@ -657,4 +657,96 @@ int dpsw_acl_add_if(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
 
 int dpsw_acl_remove_if(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
 		       u16 acl_id, const struct dpsw_acl_if_cfg *cfg);
+
+/**
+ * struct dpsw_acl_fields - ACL fields.
+ * @l2_dest_mac: Destination MAC address: BPDU, Multicast, Broadcast, Unicast,
+ *			slow protocols, MVRP, STP
+ * @l2_source_mac: Source MAC address
+ * @l2_tpid: Layer 2 (Ethernet) protocol type, used to identify the following
+ *		protocols: MPLS, PTP, PFC, ARP, Jumbo frames, LLDP, IEEE802.1ae,
+ *		Q-in-Q, IPv4, IPv6, PPPoE
+ * @l2_pcp_dei: indicate which protocol is encapsulated in the payload
+ * @l2_vlan_id: layer 2 VLAN ID
+ * @l2_ether_type: layer 2 Ethernet type
+ * @l3_dscp: Layer 3 differentiated services code point
+ * @l3_protocol: Tells the Network layer at the destination host, to which
+ *		Protocol this packet belongs to. The following protocol are
+ *		supported: ICMP, IGMP, IPv4 (encapsulation), TCP, IPv6
+ *		(encapsulation), GRE, PTP
+ * @l3_source_ip: Source IPv4 IP
+ * @l3_dest_ip: Destination IPv4 IP
+ * @l4_source_port: Source TCP/UDP Port
+ * @l4_dest_port: Destination TCP/UDP Port
+ */
+struct dpsw_acl_fields {
+	u8 l2_dest_mac[6];
+	u8 l2_source_mac[6];
+	u16 l2_tpid;
+	u8 l2_pcp_dei;
+	u16 l2_vlan_id;
+	u16 l2_ether_type;
+	u8 l3_dscp;
+	u8 l3_protocol;
+	u32 l3_source_ip;
+	u32 l3_dest_ip;
+	u16 l4_source_port;
+	u16 l4_dest_port;
+};
+
+/**
+ * struct dpsw_acl_key - ACL key
+ * @match: Match fields
+ * @mask: Mask: b'1 - valid, b'0 don't care
+ */
+struct dpsw_acl_key {
+	struct dpsw_acl_fields match;
+	struct dpsw_acl_fields mask;
+};
+
+/**
+ * enum dpsw_acl_action - action to be run on the ACL rule match
+ * @DPSW_ACL_ACTION_DROP: Drop frame
+ * @DPSW_ACL_ACTION_REDIRECT: Redirect to certain port
+ * @DPSW_ACL_ACTION_ACCEPT: Accept frame
+ * @DPSW_ACL_ACTION_REDIRECT_TO_CTRL_IF: Redirect to control interface
+ */
+enum dpsw_acl_action {
+	DPSW_ACL_ACTION_DROP,
+	DPSW_ACL_ACTION_REDIRECT,
+	DPSW_ACL_ACTION_ACCEPT,
+	DPSW_ACL_ACTION_REDIRECT_TO_CTRL_IF
+};
+
+/**
+ * struct dpsw_acl_result - ACL action
+ * @action: Action should be taken when	ACL entry hit
+ * @if_id:  Interface IDs to redirect frame. Valid only if redirect selected for
+ *		 action
+ */
+struct dpsw_acl_result {
+	enum dpsw_acl_action action;
+	u16 if_id;
+};
+
+/**
+ * struct dpsw_acl_entry_cfg - ACL entry
+ * @key_iova: I/O virtual address of DMA-able memory filled with key after call
+ *				to dpsw_acl_prepare_entry_cfg()
+ * @result: Required action when entry hit occurs
+ * @precedence: Precedence inside ACL 0 is lowest; This priority can not change
+ *		during the lifetime of a Policy. It is user responsibility to
+ *		space the priorities according to consequent rule additions.
+ */
+struct dpsw_acl_entry_cfg {
+	u64 key_iova;
+	struct dpsw_acl_result result;
+	int precedence;
+};
+
+void dpsw_acl_prepare_entry_cfg(const struct dpsw_acl_key *key,
+				u8 *entry_cfg_buf);
+
+int dpsw_acl_add_entry(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
+		       u16 acl_id, const struct dpsw_acl_entry_cfg *cfg);
 #endif /* __FSL_DPSW_H */