kernel/linux.git/include/linux/fsl/ntmp.h, branch v7.2-rc1

net: dsa: netc: add VLAN filter table and egress treatment management

2026-06-15T21:32:06+00:00

Implement the DSA .port_vlan_add and .port_vlan_del operations to enable VLAN-aware bridge offloading on the NETC switch. VLAN membership is maintained in the VLAN Filter Table (VFT). Adding the first port to a VLAN creates a new VFT entry with hardware MAC learning and flood-on-miss forwarding; subsequent ports update the existing entry's membership bitmap. Removing the last port deletes the entry. Egress tagging is handled through the Egress Treatment Table (ETT). Each VLAN is allocated a group of ETT entries, one per available port. Ports are assigned a sequential ett_offset during initialisation, used to address each port's entry within the group. Untagged ports configure the ETT to strip the outer VLAN tag; tagged ports pass frames through unmodified. Each ETT group is optionally paired with an Egress Counter Table (ECT) group for per-port frame counting, allocated on a best-effort basis. When the egress rule of an ETT entry changes, the counter of the corresponding ECT entry will be recounted to track the number of frames that match the new egress rule. A software shadow list serialised by vft_lock tracks active VLAN state across both port membership and egress tagging. VID 0 is used for single port mode and is ignored by both callbacks. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-8-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: enetc: add helpers to set/clear table bitmap

2026-06-15T21:32:06+00:00

NTMP index tables require software to allocate and manage entry IDs. Add two bitmap helper functions to facilitate this management: ntmp_lookup_free_eid(): finds the first zero bit in the given bitmap, sets it to mark the entry as in-use, and returns the corresponding entry ID. Returns NTMP_NULL_ENTRY_ID if no free entry is available. ntmp_clear_eid_bitmap(): clears the bit associated with the given entry ID in the bitmap to mark the entry as free. It is a no-op if the entry ID is NTMP_NULL_ENTRY_ID. Both functions are exported for use by other modules, such as the NETC switch driver which needs to manage group index bitmaps for the Egress Treatment Table (ETT) and Egress Count Table (ECT). Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-7-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: dsa: netc: initialize the group bitmap of ETT and ECT

2026-06-15T21:32:06+00:00

The Egress Treatment Table (ETT) and Egress Count Table (ECT) are both index tables whose entry IDs are allocated by software. Every num_ports entries form a group, where each entry in the group corresponds to one port. To facilitate group allocation and management, initialize the group index bitmaps for both tables based on hardware capabilities reported by ETTCAPR and ECTCAPR registers. The bitmap size per table is calculated as the total number of hardware entries divided by the number of available ports, which gives the number of groups available for software allocation. A set bit in the bitmap represents a group index that has been allocated. These bitmaps will be used by subsequent patches that add VLAN support. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-6-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: enetc: add "Update" operation to the egress count table

2026-06-15T21:32:05+00:00

The egress count table is a static bounded index table, egress related statistics are maintained in this table. The table is implemented as a linear array of entries accessed using an index (0, 1, 2, ..., n) that uniquely identifies an entry within the array. Egress Counter Entry ID (EC_EID) is used as an index to an entry in this table. The EC_EID is specified in the egress treatment table. Egress count table entries are always present and enabled. The table only supports access via entry ID, which is assigned by the software. And it supports Update, Query and Query followed by Update operations. Currently, only Update operation is supported. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-5-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: enetc: add interfaces to manage egress treatment table

2026-06-15T21:32:05+00:00

Each entry in the egress treatment table contains the egress packet processing actions to be applied to a grouping or scope of packets exiting on a particular egress port of the switch. A scope of packets, for example, could be the packets exiting a particular VLAN, matching a particular 802.1Q bridge forwarding entry or belonging to a stream identified at ingress. The egress treatment table is implemented as a linear array of entries accessed using an index (0,1, 2, ..., n) that uniquely identifies an entry within the array. The egress treatment table only supports access vid entry ID, which is assigned by the software. It supports Add, Update, Delete and Query operations. Note that only Query operation is not supported yet. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-4-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: enetc: add "Update" and "Delete" operations to VLAN filter table

2026-06-15T21:32:05+00:00

Add two interfaces to manage entries in the VLAN filter table: ntmp_vft_update_entry(): Update the configuration element data of the specified VLAN filter entry based on the given VLAN ID. It uses the exact key access method to locate the entry. ntmp_vft_delete_entry(): Delete the VLAN filter entry corresponding to the specified VLAN ID. It also uses the exact key access method to identify the target entry. In addition, introduce struct vft_req_qd to describe the request data buffer format for Query and Delete actions of the VLAN filter table, which contains a common request data header and a VLAN access key. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-3-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: enetc: add interfaces to manage dynamic FDB entries

2026-06-15T21:32:05+00:00

Add three interfaces to manage dynamic entries in the FDB table: ntmp_fdbt_update_activity_element(): Update the activity element of all dynamic FDB entries. For each entry, if its activity flag is not set, which means no packet has matched this entry since the last update, the activity counter is incremented. Otherwise, both the activity flag and activity counter are reset. The activity counter is used to track how long an FDB entry has been inactive, which is useful for implementing an ageing mechanism. ntmp_fdbt_delete_ageing_entries(): Delete all dynamic FDB entries whose activity flag is not set and whose activity counter is greater than or equal to the specified threshold. This is used to remove stale entries that have been inactive for too long. ntmp_fdbt_delete_port_dynamic_entries(): Delete all dynamic FDB entries associated with the specified switch port. This is typically called when a port goes down or is removed from a bridge. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260611021458.2629145-2-wei.fang@oss.nxp.com Signed-off-by: Jakub Kicinski

net: enetc: add support for "Add" and "Delete" operations to IPFT

2026-05-21T11:04:42+00:00

The ingress port filter table (IPFT )contains a set of filters each capable of classifying incoming traffic using a mix of L2, L3, and L4 parsed and arbitrary field data. As a result of a filter match, several actions can be specified such as on whether to deny or allow a frame, overriding internal QoS attributes associated with the frame and setting parameters for the subsequent frame processing functions, such as stream identification, policing, ingress mirroring. Each entry corresponds to a filter. The ingress port filter entries are added using a precedence value. If a frame matches multiple entries, the entry with the higher precedence is used. Currently, this patch only adds "Add" and "Delete" operations to the ingress port filter table. These two interfaces will be used by both ENETC driver and NETC switch driver. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260518082506.1318236-8-wei.fang@nxp.com Signed-off-by: Paolo Abeni

net: enetc: add support for the "Update" operation to buffer pool table

2026-05-21T11:04:41+00:00

The buffer pool table contains buffer pool configuration and operational information. Each entry corresponds to a buffer pool. The Entry ID value represents the buffer pool ID to access. The buffer pool table is a static bounded index table, buffer pools are always present and enabled. It only supports Update and Query operations, This patch only adds ntmp_bpt_update_entry() helper to support updating the specified entry of the buffer pool table. Query action to the table will be added in the future. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260518082506.1318236-7-wei.fang@nxp.com Signed-off-by: Paolo Abeni

net: enetc: add support for the "Add" operation to VLAN filter table

2026-05-21T11:04:41+00:00

The VLAN filter table contains configuration and control information for each VLAN configured on the switch. Each VLAN entry includes the VLAN port membership, which FID to use in the FDB lookup, which spanning tree group to use, the egress frame modification actions to apply to a frame exiting form this VLAN, and various configuration and control parameters for this VLAN. The VLAN filter table can only be managed by the command BD ring using table management protocol version 2.0. The table supports Add, Delete, Update and Query operations. And the table supports 3 access methods: Entry ID, Exact Match Key Element and Search. But currently we only add the ntmp_vft_add_entry() helper to support the upcoming switch driver to add an entry to the VLAN filter table. Other interfaces will be added in the future. Signed-off-by: Wei Fang Link: https://patch.msgid.link/20260518082506.1318236-6-wei.fang@nxp.com Signed-off-by: Paolo Abeni