1 files changed, 121 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
index 160d6cd164f4..7a15e932ed2f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
@@ -41,6 +41,47 @@ static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id,
 	return 0;
 }
 
+static int
+mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
+			      u16 offset, u16 size, void *data,
+			      unsigned int *p_read_size)
+{
+	char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
+	char mcia_pl[MLXSW_REG_MCIA_LEN];
+	u16 i2c_addr;
+	int status;
+	int err;
+
+	size = min_t(u16, size, MLXSW_REG_MCIA_EEPROM_SIZE);
+
+	if (offset < MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH &&
+	    offset + size > MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH)
+		/* Cross pages read, read until offset 256 in low page */
+		size = MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH - offset;
+
+	i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_LOW;
+	if (offset >= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH) {
+		i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_HIGH;
+		offset -= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH;
+	}
+
+	mlxsw_reg_mcia_pack(mcia_pl, module, 0, 0, offset, size, i2c_addr);
+
+	err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcia), mcia_pl);
+	if (err)
+		return err;
+
+	status = mlxsw_reg_mcia_status_get(mcia_pl);
+	if (status)
+		return -EIO;
+
+	mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
+	memcpy(data, eeprom_tmp, size);
+	*p_read_size = size;
+
+	return 0;
+}
+
 int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
 					 int off, int *temp)
 {
@@ -115,3 +156,83 @@ int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
 
 	return 0;
 }
+
+int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
+			      struct ethtool_modinfo *modinfo)
+{
+	u8 module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE];
+	u16 offset = MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE;
+	u8 module_rev_id, module_id;
+	unsigned int read_size;
+	int err;
+
+	err = mlxsw_env_query_module_eeprom(mlxsw_core, module, 0, offset,
+					    module_info, &read_size);
+	if (err)
+		return err;
+
+	if (read_size < offset)
+		return -EIO;
+
+	module_rev_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID];
+	module_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID];
+
+	switch (module_id) {
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP:
+		modinfo->type       = ETH_MODULE_SFF_8436;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
+		break;
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
+		if (module_id == MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28 ||
+		    module_rev_id >=
+		    MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID_8636) {
+			modinfo->type       = ETH_MODULE_SFF_8636;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8636_LEN;
+		} else {
+			modinfo->type       = ETH_MODULE_SFF_8436;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
+		}
+		break;
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP:
+		modinfo->type       = ETH_MODULE_SFF_8472;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(mlxsw_env_get_module_info);
+
+int mlxsw_env_get_module_eeprom(struct net_device *netdev,
+				struct mlxsw_core *mlxsw_core, int module,
+				struct ethtool_eeprom *ee, u8 *data)
+{
+	int offset = ee->offset;
+	unsigned int read_size;
+	int i = 0;
+	int err;
+
+	if (!ee->len)
+		return -EINVAL;
+
+	memset(data, 0, ee->len);
+
+	while (i < ee->len) {
+		err = mlxsw_env_query_module_eeprom(mlxsw_core, module, offset,
+						    ee->len - i, data + i,
+						    &read_size);
+		if (err) {
+			netdev_err(netdev, "Eeprom query failed\n");
+			return err;
+		}
+
+		i += read_size;
+		offset += read_size;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(mlxsw_env_get_module_eeprom);