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Commit d62dd8a0 authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

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: default avatarIdo Schimmel <idosch@mellanox.com>
Reviewed-by: default avatarPetr Machata <petrm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7c4a7292

drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c

+33 −0
Original line number Diff line number Diff line
@@ -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 */