netdev - [PATCH net-next 06/13] mlxsw: reg: Add SMPE related fields to SFMR register

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Date:   Sun, 19 Jun 2022 13:29:14 +0300
From:   Ido Schimmel <idosch@...dia.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, petrm@...dia.com, amcohen@...dia.com,
        mlxsw@...dia.com, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 06/13] mlxsw: reg: Add SMPE related fields to SFMR register

From: Amit Cohen <amcohen@...dia.com>

SFMR register creates and configures FIDs. As preparation unified bridge
model, add some required fields for future use.

The device includes two main tables to support layer 2 multicast (i.e.,
MDB and flooding). These are the PGT (Port Group Table) and the
MPE (Multicast Port Egress) table.
- PGT is {MID -> (bitmap of local_port, SPME index)}
- MPE is {(Local port, SMPE index) -> eVID}

In Spectrum-2 and later ASICs, the SMPE index is an attribute of the FID
and programmed via new fields in SFMR register - 'smpe_valid' and 'smpe'.

Add the two mentioned fields for future use and increase the length of
the register accordingly.

Signed-off-by: Amit Cohen <amcohen@...dia.com>
Reviewed-by: Danielle Ratson <danieller@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 62e1c2ffb27f..d30b32c02cfb 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -1761,7 +1761,7 @@ static inline void mlxsw_reg_svpe_pack(char *payload, u16 local_port,
  * Creates and configures FIDs.
  */
 #define MLXSW_REG_SFMR_ID 0x201F
-#define MLXSW_REG_SFMR_LEN 0x18
+#define MLXSW_REG_SFMR_LEN 0x30
 
 MLXSW_REG_DEFINE(sfmr, MLXSW_REG_SFMR_ID, MLXSW_REG_SFMR_LEN);
 
@@ -1858,6 +1858,25 @@ MLXSW_ITEM32(reg, sfmr, irif_v, 0x14, 24, 1);
  */
 MLXSW_ITEM32(reg, sfmr, irif, 0x14, 0, 16);
 
+/* reg_sfmr_smpe_valid
+ * SMPE is valid.
+ * Access: RW
+ *
+ * Note: Reserved when legacy bridge model is used, when flood_rsp=1 and on
+ * Spectrum-1.
+ */
+MLXSW_ITEM32(reg, sfmr, smpe_valid, 0x28, 20, 1);
+
+/* reg_sfmr_smpe
+ * Switch multicast port to egress VID.
+ * Range is 0..cap_max_rmpe-1
+ * Access: RW
+ *
+ * Note: Reserved when legacy bridge model is used, when flood_rsp=1 and on
+ * Spectrum-1.
+ */
+MLXSW_ITEM32(reg, sfmr, smpe, 0x28, 0, 16);
+
 static inline void mlxsw_reg_sfmr_pack(char *payload,
 				       enum mlxsw_reg_sfmr_op op, u16 fid,
 				       u16 fid_offset)
-- 
2.36.1