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Date: Wed, 14 Jun 2017 09:27:40 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, idosch@...lanox.com, arkadis@...lanox.com,
mlxsw@...lanox.com
Subject: [patch net-next 2/2] mlxsw: spectrum: Add support for access cable info via ethtool
From: Arkadi Sharshevsky <arkadis@...lanox.com>
Add support for access cable info via ethtool.
Signed-off-by: Arkadi Sharshevsky <arkadis@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 131 +++++++++++++++++++++++++
1 file changed, 131 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 0e51c36..60bf8f2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -2519,6 +2519,135 @@ static int mlxsw_sp_flash_device(struct net_device *dev,
return err;
}
+#define MLXSW_SP_QSFP_I2C_ADDR 0x50
+
+static int mlxsw_sp_query_module_eeprom(struct mlxsw_sp_port *mlxsw_sp_port,
+ u16 offset, u16 size, void *data,
+ unsigned int *p_read_size)
+{
+ struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+ char eeprom_tmp[MLXSW_SP_REG_MCIA_EEPROM_SIZE];
+ char mcia_pl[MLXSW_REG_MCIA_LEN];
+ int status;
+ int err;
+
+ size = min_t(u16, size, MLXSW_SP_REG_MCIA_EEPROM_SIZE);
+ mlxsw_reg_mcia_pack(mcia_pl, mlxsw_sp_port->mapping.module,
+ 0, 0, offset, size, MLXSW_SP_QSFP_I2C_ADDR);
+
+ err = mlxsw_reg_query(mlxsw_sp->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;
+}
+
+enum mlxsw_sp_eeprom_module_info_rev_id {
+ MLXSW_SP_EEPROM_MODULE_INFO_REV_ID_UNSPC = 0x00,
+ MLXSW_SP_EEPROM_MODULE_INFO_REV_ID_8436 = 0x01,
+ MLXSW_SP_EEPROM_MODULE_INFO_REV_ID_8636 = 0x03,
+};
+
+enum mlxsw_sp_eeprom_module_info_id {
+ MLXSW_SP_EEPROM_MODULE_INFO_ID_SFP = 0x03,
+ MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP = 0x0C,
+ MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP_PLUS = 0x0D,
+ MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP28 = 0x11,
+};
+
+enum mlxsw_sp_eeprom_module_info {
+ MLXSW_SP_EEPROM_MODULE_INFO_ID,
+ MLXSW_SP_EEPROM_MODULE_INFO_REV_ID,
+ MLXSW_SP_EEPROM_MODULE_INFO_SIZE,
+};
+
+static int mlxsw_sp_get_module_info(struct net_device *netdev,
+ struct ethtool_modinfo *modinfo)
+{
+ struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(netdev);
+ u8 module_info[MLXSW_SP_EEPROM_MODULE_INFO_SIZE];
+ u8 module_rev_id, module_id;
+ unsigned int read_size;
+ int err;
+
+ err = mlxsw_sp_query_module_eeprom(mlxsw_sp_port, 0,
+ MLXSW_SP_EEPROM_MODULE_INFO_SIZE,
+ module_info, &read_size);
+ if (err)
+ return err;
+
+ if (read_size < MLXSW_SP_EEPROM_MODULE_INFO_SIZE)
+ return -EIO;
+
+ module_rev_id = module_info[MLXSW_SP_EEPROM_MODULE_INFO_REV_ID];
+ module_id = module_info[MLXSW_SP_EEPROM_MODULE_INFO_ID];
+
+ switch (module_id) {
+ case MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP:
+ modinfo->type = ETH_MODULE_SFF_8436;
+ modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
+ break;
+ case MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP_PLUS:
+ case MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP28:
+ if (module_id == MLXSW_SP_EEPROM_MODULE_INFO_ID_QSFP28 ||
+ module_rev_id >= MLXSW_SP_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_SP_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;
+}
+
+static int mlxsw_sp_get_module_eeprom(struct net_device *netdev,
+ struct ethtool_eeprom *ee,
+ u8 *data)
+{
+ struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(netdev);
+ 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_sp_query_module_eeprom(mlxsw_sp_port, offset,
+ ee->len - i, data + i,
+ &read_size);
+ if (err) {
+ netdev_err(mlxsw_sp_port->dev, "Eeprom query failed\n");
+ return err;
+ }
+
+ i += read_size;
+ offset += read_size;
+ }
+
+ return 0;
+}
+
static const struct ethtool_ops mlxsw_sp_port_ethtool_ops = {
.get_drvinfo = mlxsw_sp_port_get_drvinfo,
.get_link = ethtool_op_get_link,
@@ -2531,6 +2660,8 @@ static const struct ethtool_ops mlxsw_sp_port_ethtool_ops = {
.get_link_ksettings = mlxsw_sp_port_get_link_ksettings,
.set_link_ksettings = mlxsw_sp_port_set_link_ksettings,
.flash_device = mlxsw_sp_flash_device,
+ .get_module_info = mlxsw_sp_get_module_info,
+ .get_module_eeprom = mlxsw_sp_get_module_eeprom,
};
static int
--
2.9.3
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