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mlxsw: spectrum_fid: Introduce emulated 802.1Q FIDs 

The driver uses 802.1Q FIDs when offloading a VLAN-aware bridge.
Unfortunately, it is not possible to assign a VNI to such FIDs, which
prompts the driver to forbid the enslavement of VxLAN devices to a
VLAN-aware bridge.

Workaround this hardware limitation by creating a new family of FIDs,
emulated 802.1Q FIDs. These FIDs are emulated using 802.1D FIDs, which
can be assigned a VNI.

The downside of this approach is that multiple {Port, VID}->FID entries
are required, whereas only a single VID->FID is required with "true"
802.1Q FIDs.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2018-11-25 09:43:57 +00:00 committed by David S. Miller
parent 7c4a729221
commit d62dd8a0c8
1 changed files with 33 additions and 0 deletions
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33
drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c
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@ -801,6 +801,39 @@ static const struct mlxsw_sp_fid_family mlxsw_sp_fid_8021d_family = {
.lag_vid_valid = 1,
};
static const struct mlxsw_sp_fid_ops mlxsw_sp_fid_8021q_emu_ops = {
.setup = mlxsw_sp_fid_8021q_setup,
.configure = mlxsw_sp_fid_8021d_configure,
.deconfigure = mlxsw_sp_fid_8021d_deconfigure,
.index_alloc = mlxsw_sp_fid_8021d_index_alloc,
.compare = mlxsw_sp_fid_8021q_compare,
.flood_index = mlxsw_sp_fid_8021d_flood_index,
.port_vid_map = mlxsw_sp_fid_8021d_port_vid_map,
.port_vid_unmap = mlxsw_sp_fid_8021d_port_vid_unmap,
.vni_set = mlxsw_sp_fid_8021d_vni_set,
.vni_clear = mlxsw_sp_fid_8021d_vni_clear,
.nve_flood_index_set = mlxsw_sp_fid_8021d_nve_flood_index_set,
.nve_flood_index_clear = mlxsw_sp_fid_8021d_nve_flood_index_clear,
};
/* There are 4K-2 emulated 802.1Q FIDs, starting right after the 802.1D FIDs */
#define MLXSW_SP_FID_8021Q_EMU_START (VLAN_N_VID + MLXSW_SP_FID_8021D_MAX)
#define MLXSW_SP_FID_8021Q_EMU_END (MLXSW_SP_FID_8021Q_EMU_START + \
VLAN_VID_MASK - 2)
/* Range and flood configuration must match mlxsw_config_profile */
static const struct mlxsw_sp_fid_family mlxsw_sp_fid_8021q_emu_family = {
.type = MLXSW_SP_FID_TYPE_8021Q,
.fid_size = sizeof(struct mlxsw_sp_fid_8021q),
.start_index = MLXSW_SP_FID_8021Q_EMU_START,
.end_index = MLXSW_SP_FID_8021Q_EMU_END,
.flood_tables = mlxsw_sp_fid_8021d_flood_tables,
.nr_flood_tables = ARRAY_SIZE(mlxsw_sp_fid_8021d_flood_tables),
.rif_type = MLXSW_SP_RIF_TYPE_VLAN,
.ops = &mlxsw_sp_fid_8021q_emu_ops,
.lag_vid_valid = 1,
};
static int mlxsw_sp_fid_rfid_configure(struct mlxsw_sp_fid *fid)
{
/* rFIDs are allocated by the device during init */