[PATCH net-next 09/10] mlxsw: spectrum: Add Spectrum-2 ASIC port type-speed operations

[Ido Schimmel <idosch@mellanox.com>]

From: Shalom Toledo <shalomt@mellanox.com>

Add Spectrum-2 ASIC port type-speed operations.

Since multiple ethtool link modes are represented using a single bit in the
ASIC, the driver forces the user to configure all types per a specific
speed. For example, if the user wants to advertise 100Gbps 4-lanes speed,
he should advertise all the types of 100Gbps 4-lanes speed that are
supported by the ASIC as shown below:

  Supported ethtool bits for 100Gbps 4-lanes:
      0x1000000000      100000baseKR4 Full
      0x2000000000      100000baseSR4 Full
      0x4000000000      100000baseCR4 Full
      0x8000000000      100000baseLR4_ER4 Full

  Command for advertising 100Gbps 4-lanes:
      ethtool -s enp3s0np1 advertise 0xF000000000

Signed-off-by: Shalom Toledo <shalomt@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
---
 .../net/ethernet/mellanox/mlxsw/spectrum.c    | 330 +++++++++++++++++-
 .../net/ethernet/mellanox/mlxsw/spectrum.h    |   1 +
 2 files changed, 330 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index fc0e7924233e..c55b478e48e9 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -2607,6 +2607,334 @@ mlxsw_sp1_port_type_speed_ops = {
 	.reg_ptys_eth_unpack		= mlxsw_sp1_reg_ptys_eth_unpack,
 };
 
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_sgmii_100m[] = {
+	ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_SGMII_100M_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_sgmii_100m)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_1000base_x_sgmii[] = {
+	ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_1000BASE_X_SGMII_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_1000base_x_sgmii)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_2_5gbase_x_2_5gmii[] = {
+	ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_2_5GBASE_X_2_5GMII_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_2_5gbase_x_2_5gmii)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_5gbase_r[] = {
+	ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_5GBASE_R_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_5gbase_r)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_xfi_xaui_1_10g[] = {
+	ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
+	ETHTOOL_LINK_MODE_10000baseCR_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseSR_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseLR_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseER_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_XFI_XAUI_1_10G_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_xfi_xaui_1_10g)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_xlaui_4_xlppi_4_40g[] = {
+	ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
+	ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
+	ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
+	ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_XLAUI_4_XLPPI_4_40G_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_xlaui_4_xlppi_4_40g)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_25gaui_1_25gbase_cr_kr[] = {
+	ETHTOOL_LINK_MODE_25000baseCR_Full_BIT,
+	ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
+	ETHTOOL_LINK_MODE_25000baseSR_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_25GAUI_1_25GBASE_CR_KR_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_25gaui_1_25gbase_cr_kr)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_50gaui_2_laui_2_50gbase_cr2_kr2[] = {
+	ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT,
+	ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT,
+	ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_50GAUI_2_LAUI_2_50GBASE_CR2_KR2_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_50gaui_2_laui_2_50gbase_cr2_kr2)
+
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_caui_4_100gbase_cr4_kr4[] = {
+	ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
+	ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT,
+	ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
+	ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_CAUI_4_100GBASE_CR4_KR4_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_caui_4_100gbase_cr4_kr4)
+
+struct mlxsw_sp2_port_link_mode {
+	const enum ethtool_link_mode_bit_indices *mask_ethtool;
+	int m_ethtool_len;
+	u32 mask;
+	u32 speed;
+};
+
+static const struct mlxsw_sp2_port_link_mode mlxsw_sp2_port_link_mode[] = {
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_SGMII_100M,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_sgmii_100m,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_SGMII_100M_LEN,
+		.speed		= SPEED_100,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_1000BASE_X_SGMII,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_1000base_x_sgmii,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_1000BASE_X_SGMII_LEN,
+		.speed		= SPEED_1000,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_2_5GBASE_X_2_5GMII,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_2_5gbase_x_2_5gmii,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_2_5GBASE_X_2_5GMII_LEN,
+		.speed		= SPEED_2500,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_5GBASE_R,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_5gbase_r,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_5GBASE_R_LEN,
+		.speed		= SPEED_5000,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_XFI_XAUI_1_10G,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_xfi_xaui_1_10g,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_XFI_XAUI_1_10G_LEN,
+		.speed		= SPEED_10000,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_XLAUI_4_XLPPI_4_40G,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_xlaui_4_xlppi_4_40g,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_XLAUI_4_XLPPI_4_40G_LEN,
+		.speed		= SPEED_40000,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_25GAUI_1_25GBASE_CR_KR,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_25gaui_1_25gbase_cr_kr,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_25GAUI_1_25GBASE_CR_KR_LEN,
+		.speed		= SPEED_25000,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_50GAUI_2_LAUI_2_50GBASE_CR2_KR2,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_50gaui_2_laui_2_50gbase_cr2_kr2,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_50GAUI_2_LAUI_2_50GBASE_CR2_KR2_LEN,
+		.speed		= SPEED_50000,
+	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_CAUI_4_100GBASE_CR4_KR4,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_caui_4_100gbase_cr4_kr4,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_CAUI_4_100GBASE_CR4_KR4_LEN,
+		.speed		= SPEED_100000,
+	},
+};
+
+#define MLXSW_SP2_PORT_LINK_MODE_LEN ARRAY_SIZE(mlxsw_sp2_port_link_mode)
+
+static void
+mlxsw_sp2_from_ptys_supported_port(struct mlxsw_sp *mlxsw_sp,
+				   u32 ptys_eth_proto,
+				   struct ethtool_link_ksettings *cmd)
+{
+	ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
+	ethtool_link_ksettings_add_link_mode(cmd, supported, Backplane);
+}
+
+static void
+mlxsw_sp2_set_bit_ethtool(const struct mlxsw_sp2_port_link_mode *link_mode,
+			  unsigned long *mode)
+{
+	int i;
+
+	for (i = 0; i < link_mode->m_ethtool_len; i++)
+		__set_bit(link_mode->mask_ethtool[i], mode);
+}
+
+static void
+mlxsw_sp2_from_ptys_link(struct mlxsw_sp *mlxsw_sp, u32 ptys_eth_proto,
+			 unsigned long *mode)
+{
+	int i;
+
+	for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+		if (ptys_eth_proto & mlxsw_sp2_port_link_mode[i].mask)
+			mlxsw_sp2_set_bit_ethtool(&mlxsw_sp2_port_link_mode[i],
+						  mode);
+	}
+}
+
+static void
+mlxsw_sp2_from_ptys_speed_duplex(struct mlxsw_sp *mlxsw_sp, bool carrier_ok,
+				 u32 ptys_eth_proto,
+				 struct ethtool_link_ksettings *cmd)
+{
+	u32 speed = SPEED_UNKNOWN;
+	u8 duplex = DUPLEX_UNKNOWN;
+	int i;
+
+	if (!carrier_ok)
+		goto out;
+
+	for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+		if (ptys_eth_proto & mlxsw_sp2_port_link_mode[i].mask) {
+			speed = mlxsw_sp2_port_link_mode[i].speed;
+			duplex = DUPLEX_FULL;
+			break;
+		}
+	}
+out:
+	cmd->base.speed = speed;
+	cmd->base.duplex = duplex;
+}
+
+static bool
+mlxsw_sp2_test_bit_ethtool(const struct mlxsw_sp2_port_link_mode *link_mode,
+			   const unsigned long *mode)
+{
+	int cnt = 0;
+	int i;
+
+	for (i = 0; i < link_mode->m_ethtool_len; i++) {
+		if (test_bit(link_mode->mask_ethtool[i], mode))
+			cnt++;
+	}
+
+	return cnt == link_mode->m_ethtool_len;
+}
+
+static u32
+mlxsw_sp2_to_ptys_advert_link(struct mlxsw_sp *mlxsw_sp,
+			      const struct ethtool_link_ksettings *cmd)
+{
+	u32 ptys_proto = 0;
+	int i;
+
+	for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+		if (mlxsw_sp2_test_bit_ethtool(&mlxsw_sp2_port_link_mode[i],
+					       cmd->link_modes.advertising))
+			ptys_proto |= mlxsw_sp2_port_link_mode[i].mask;
+	}
+	return ptys_proto;
+}
+
+static u32 mlxsw_sp2_to_ptys_speed(struct mlxsw_sp *mlxsw_sp, u32 speed)
+{
+	u32 ptys_proto = 0;
+	int i;
+
+	for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+		if (speed == mlxsw_sp2_port_link_mode[i].speed)
+			ptys_proto |= mlxsw_sp2_port_link_mode[i].mask;
+	}
+	return ptys_proto;
+}
+
+static u32
+mlxsw_sp2_to_ptys_upper_speed(struct mlxsw_sp *mlxsw_sp, u32 upper_speed)
+{
+	u32 ptys_proto = 0;
+	int i;
+
+	for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+		if (mlxsw_sp2_port_link_mode[i].speed <= upper_speed)
+			ptys_proto |= mlxsw_sp2_port_link_mode[i].mask;
+	}
+	return ptys_proto;
+}
+
+static int
+mlxsw_sp2_port_speed_base(struct mlxsw_sp *mlxsw_sp, u8 local_port,
+			  u32 *base_speed)
+{
+	char ptys_pl[MLXSW_REG_PTYS_LEN];
+	u32 eth_proto_cap;
+	int err;
+
+	/* In Spectrum-2, the speed of 1x can change from port to port, so query
+	 * it from firmware.
+	 */
+	mlxsw_reg_ptys_ext_eth_pack(ptys_pl, local_port, 0, false);
+	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
+	if (err)
+		return err;
+	mlxsw_reg_ptys_ext_eth_unpack(ptys_pl, &eth_proto_cap, NULL, NULL);
+
+	if (eth_proto_cap &
+	    MLXSW_REG_PTYS_EXT_ETH_SPEED_50GAUI_1_LAUI_1_50GBASE_CR_KR) {
+		*base_speed = MLXSW_SP_PORT_BASE_SPEED_50G;
+		return 0;
+	}
+
+	if (eth_proto_cap &
+	    MLXSW_REG_PTYS_EXT_ETH_SPEED_25GAUI_1_25GBASE_CR_KR) {
+		*base_speed = MLXSW_SP_PORT_BASE_SPEED_25G;
+		return 0;
+	}
+
+	return -EIO;
+}
+
+static void
+mlxsw_sp2_reg_ptys_eth_pack(struct mlxsw_sp *mlxsw_sp, char *payload,
+			    u8 local_port, u32 proto_admin,
+			    bool autoneg)
+{
+	mlxsw_reg_ptys_ext_eth_pack(payload, local_port, proto_admin, autoneg);
+}
+
+static void
+mlxsw_sp2_reg_ptys_eth_unpack(struct mlxsw_sp *mlxsw_sp, char *payload,
+			      u32 *p_eth_proto_cap, u32 *p_eth_proto_admin,
+			      u32 *p_eth_proto_oper)
+{
+	mlxsw_reg_ptys_ext_eth_unpack(payload, p_eth_proto_cap,
+				      p_eth_proto_admin, p_eth_proto_oper);
+}
+
+static const struct mlxsw_sp_port_type_speed_ops
+mlxsw_sp2_port_type_speed_ops = {
+	.from_ptys_supported_port	= mlxsw_sp2_from_ptys_supported_port,
+	.from_ptys_link			= mlxsw_sp2_from_ptys_link,
+	.from_ptys_speed_duplex		= mlxsw_sp2_from_ptys_speed_duplex,
+	.to_ptys_advert_link		= mlxsw_sp2_to_ptys_advert_link,
+	.to_ptys_speed			= mlxsw_sp2_to_ptys_speed,
+	.to_ptys_upper_speed		= mlxsw_sp2_to_ptys_upper_speed,
+	.port_speed_base		= mlxsw_sp2_port_speed_base,
+	.reg_ptys_eth_pack		= mlxsw_sp2_reg_ptys_eth_pack,
+	.reg_ptys_eth_unpack		= mlxsw_sp2_reg_ptys_eth_unpack,
+};
+
 static void
 mlxsw_sp_port_get_link_supported(struct mlxsw_sp *mlxsw_sp, u32 eth_proto_cap,
 				 struct ethtool_link_ksettings *cmd)
@@ -4189,7 +4517,7 @@ static int mlxsw_sp2_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->mac_mask = mlxsw_sp2_mac_mask;
 	mlxsw_sp->rif_ops_arr = mlxsw_sp2_rif_ops_arr;
 	mlxsw_sp->sb_vals = &mlxsw_sp2_sb_vals;
-	mlxsw_sp->port_type_speed_ops = &mlxsw_sp1_port_type_speed_ops;
+	mlxsw_sp->port_type_speed_ops = &mlxsw_sp2_port_type_speed_ops;
 
 	return mlxsw_sp_init(mlxsw_core, mlxsw_bus_info);
 }
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index d4f53632b24c..a61c1130d9e3 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -34,6 +34,7 @@
 #define MLXSW_SP_PORTS_PER_CLUSTER_MAX 4
 
 #define MLXSW_SP_PORT_BASE_SPEED_25G 25000 /* Mb/s */
+#define MLXSW_SP_PORT_BASE_SPEED_50G 50000 /* Mb/s */
 
 #define MLXSW_SP_KVD_LINEAR_SIZE 98304 /* entries */
 #define MLXSW_SP_KVD_GRANULARITY 128
-- 
2.20.1