Merge tag 'mlx5-updates-2023-04-11' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2023-04-11

1) Vlad adds the support for linux bridge multicast offload support
   Patches #1 through #9
   Synopsis

Vlad Says:
==============
Implement support of bridge multicast offload in mlx5. Handle port object
attribute SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED notification to toggle multicast
offload and bridge snooping support on bridge. Handle port object
SWITCHDEV_OBJ_ID_PORT_MDB notification to attach a bridge port to MDB.

Steering architecture

Existing offload infrastructure relies on two levels of flow tables - bridge
ingress and egress. For multicast offload the architecture is extended with
additional layer of per-port multicast replication tables. Such tables filter
loopback traffic (so packets are not replicated to their source port) and pop
VLAN headers for "untagged" VLANs. The tables are referenced by the MDB rules in
egress table. MDB egress rule can point to multiple per-port multicast tables,
which causes matching multicast traffic to be replicated to all of them, and,
consecutively, to several bridge ports:

                                                                                                                            +--------+--+
                                                                                    +---------------------------------------> Port 1 |  |
                                                                                    |                                       +-^------+--+
                                                                                    |                                         |
                                                                                    |                                         |
                                       +-----------------------------------------+  |     +---------------------------+       |
                                       | EGRESS table                            |  |  +--> PORT 1 multicast table    |       |
+----------------------------------+   +-----------------------------------------+  |  |  +---------------------------+       |
| INGRESS table                    |   |                                         |  |  |  |                           |       |
+----------------------------------+   | dst_mac=P1,vlan=X -> pop vlan, goto P1  +--+  |  | FG0:                      |       |
|                                  |   | dst_mac=P1,vlan=Y -> pop vlan, goto P1  |     |  | src_port=dst_port -> drop |       |
| src_mac=M1,vlan=X -> goto egress +---> dst_mac=P2,vlan=X -> pop vlan, goto P2  +--+  |  | FG1:                      |       |
| ...                              |   | dst_mac=P2,vlan=Y -> goto P2            |  |  |  | VLAN X -> pop, goto port  |       |
|                                  |   | dst_mac=MDB1,vlan=Y -> goto mcast P1,P2 +-----+  | ...                       |       |
+----------------------------------+   |                                         |  |  |  | VLAN Y -> pop, goto port  +-------+
                                       +-----------------------------------------+  |  |  | FG3:                      |
                                                                                    |  |  | matchall -> goto port     |
                                                                                    |  |  |                           |
                                                                                    |  |  +---------------------------+
                                                                                    |  |
                                                                                    |  |
                                                                                    |  |                                    +--------+--+
                                                                                    +---------------------------------------> Port 2 |  |
                                                                                       |                                    +-^------+--+
                                                                                       |                                      |
                                                                                       |                                      |
                                                                                       |  +---------------------------+       |
                                                                                       +--> PORT 2 multicast table    |       |
                                                                                          +---------------------------+       |
                                                                                          |                           |       |
                                                                                          | FG0:                      |       |
                                                                                          | src_port=dst_port -> drop |       |
                                                                                          | FG1:                      |       |
                                                                                          | VLAN X -> pop, goto port  |       |
                                                                                          | ...                       |       |
                                                                                          |                           |       |
                                                                                          | FG3:                      |       |
                                                                                          | matchall -> goto port     +-------+
                                                                                          |                           |
                                                                                          +---------------------------+

Patches overview:

- Patch 1 adds hardware definition bits for capabilities required to replicate
  multicast packets to multiple per-port tables. These bits are used by
  following patches to only attempt multicast offload if firmware and hardware
  provide necessary support.

- Pathces 2-4 patches are preparations and refactoring.

- Patch 5 implements necessary infrastructure to toggle multicast offload
  via SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED port object attribute notification.
  This also enabled IGMP and MLD snooping.

- Patch 6 implements per-port multicast replication tables. It only supports
  filtering of loopback packets.

- Patch 7 extends per-port multicast tables with VLAN pop support for 'untagged'
  VLANs.

- Patch 8 handles SWITCHDEV_OBJ_ID_PORT_MDB port object notifications. It
  creates MDB replication rules in egress table that can replicate packets to
  multiple per-port multicast tables.

- Patch 9 adds tracepoints for MDB events.

==============

2) Parav Create a new allocation profile for SFs, to save on memory

3) Yevgeny provides some initial patches for upcoming software steering
   support new pattern/arguments type of modify_header actions.

Starting with ConnectX-6 DX, we use a new design of modify_header FW object.
The current modify_header object allows for having only limited number of
these FW objects, which means that we are limited in the number of offloaded
flows that require modify_header action.

As a preparation Yevgeny provides the following 4 patches:
 - Patch 1: Add required mlx5_ifc HW bits
 - Patch 2, 3: Add new WQE type and opcode that is required for pattern/arg
   support and adds appropriate support in dr_send.c
 - Patch 4: Add ICM pool for modify-header-pattern objects and implement
   patterns cache, allowing patterns reuse for different flows

* tag 'mlx5-updates-2023-04-11' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5: DR, Add modify-header-pattern ICM pool
  net/mlx5: DR, Prepare sending new WQE type
  net/mlx5: Add new WQE for updating flow table
  net/mlx5: Add mlx5_ifc bits for modify header argument
  net/mlx5: DR, Set counter ID on the last STE for STEv1 TX
  net/mlx5: Create a new profile for SFs
  net/mlx5: Bridge, add tracepoints for multicast
  net/mlx5: Bridge, implement mdb offload
  net/mlx5: Bridge, support multicast VLAN pop
  net/mlx5: Bridge, add per-port multicast replication tables
  net/mlx5: Bridge, snoop igmp/mld packets
  net/mlx5: Bridge, extract code to lookup parent bridge of port
  net/mlx5: Bridge, move additional data structures to priv header
  net/mlx5: Bridge, increase bridge tables sizes
  net/mlx5: Add mlx5_ifc definitions for bridge multicast support
====================

Link: https://lore.kernel.org/r/20230412040752.14220-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
index 2b769dcbd453..5b9faa714f42 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
@@ -26,6 +26,8 @@
 #define mlx5dr_info(dmn, arg...) mlx5_core_info((dmn)->mdev, ##arg)
 #define mlx5dr_dbg(dmn, arg...) mlx5_core_dbg((dmn)->mdev, ##arg)
 
+struct mlx5dr_ptrn_mgr;
+
 static inline bool dr_is_flex_parser_0_id(u8 parser_id)
 {
 	return parser_id <= DR_STE_MAX_FLEX_0_ID;
@@ -66,6 +68,7 @@ enum mlx5dr_icm_chunk_size {
 enum mlx5dr_icm_type {
 	DR_ICM_TYPE_STE,
 	DR_ICM_TYPE_MODIFY_ACTION,
+	DR_ICM_TYPE_MODIFY_HDR_PTRN,
 };
 
 static inline enum mlx5dr_icm_chunk_size
@@ -861,6 +864,8 @@ struct mlx5dr_cmd_caps {
 	u64 esw_tx_drop_address;
 	u32 log_icm_size;
 	u64 hdr_modify_icm_addr;
+	u32 log_modify_pattern_icm_size;
+	u64 hdr_modify_pattern_icm_addr;
 	u32 flex_protocols;
 	u8 flex_parser_id_icmp_dw0;
 	u8 flex_parser_id_icmp_dw1;
@@ -910,6 +915,7 @@ struct mlx5dr_domain_info {
 	u32 max_send_wr;
 	u32 max_log_sw_icm_sz;
 	u32 max_log_action_icm_sz;
+	u32 max_log_modify_hdr_pattern_icm_sz;
 	struct mlx5dr_domain_rx_tx rx;
 	struct mlx5dr_domain_rx_tx tx;
 	struct mlx5dr_cmd_caps caps;
@@ -928,6 +934,7 @@ struct mlx5dr_domain {
 	struct mlx5dr_send_info_pool *send_info_pool_tx;
 	struct kmem_cache *chunks_kmem_cache;
 	struct kmem_cache *htbls_kmem_cache;
+	struct mlx5dr_ptrn_mgr *ptrn_mgr;
 	struct mlx5dr_send_ring *send_ring;
 	struct mlx5dr_domain_info info;
 	struct xarray csum_fts_xa;
@@ -1526,4 +1533,8 @@ static inline bool mlx5dr_supp_match_ranges(struct mlx5_core_dev *dev)
 			(1ULL << MLX5_IFC_DEFINER_FORMAT_ID_SELECT));
 }
 
+bool mlx5dr_domain_is_support_ptrn_arg(struct mlx5dr_domain *dmn);
+struct mlx5dr_ptrn_mgr *mlx5dr_ptrn_mgr_create(struct mlx5dr_domain *dmn);
+void mlx5dr_ptrn_mgr_destroy(struct mlx5dr_ptrn_mgr *mgr);
+
 #endif  /* _DR_TYPES_H_ */