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mlxsw: core: Extend QSFP EEPROM size for ethtool

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Extend the size of QSFP EEPROM for the cable types SSF8436 and SFF8636
from 256 to 640 bytes in order to expose all the EEPROM pages by
ethtool.

For SFF-8636 and SFF-8436 specifications, the driver exposes 256 bytes
of data for ethtool's get_module_eeprom() callback. This is because the
driver uses the below defines to specify SFF module length in ethtool's
get_module_info() callback:
'ETH_MODULE_SFF_8636_LEN' and 'ETH_MODULE_SFF_8436_LEN' (both are 256).

As a result of exposing 256 bytes only, ethtool shows wrong "zero" info
for pages 1, 2, 3.

The patch changes the length returned by callback for get_module_info()
to the values from the next defines: 'ETH_MODULE_SFF_8636_MAX_LEN' and
'ETH_MODULE_SFF_8436_MAX_LEN' (both are 640) to allow exposing of upper
page 1, 2 and 3.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
This commit is contained in:
Vadim Pasternak 2019-10-21 13:30:31 +03:00 committed by Jakub Kicinski
parent f366cd2a2e
commit a45bfb5a50
1 changed files with 17 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/net/ethernet/mellanox/mlxsw/core_env.c
View File

@ -50,6 +50,7 @@ mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
char mcia_pl[MLXSW_REG_MCIA_LEN];
u16 i2c_addr;
u8 page = 0;
int status;
int err;
@ -62,11 +63,21 @@ mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
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;
page = MLXSW_REG_MCIA_PAGE_GET(offset);
offset -= MLXSW_REG_MCIA_EEPROM_UP_PAGE_LENGTH * page;
/* When reading upper pages 1, 2 and 3 the offset starts at
* 128. Please refer to "QSFP+ Memory Map" figure in SFF-8436
* specification for graphical depiction.
* MCIA register accepts buffer size <= 48. Page of size 128
* should be read by chunks of size 48, 48, 32. Align the size
* of the last chunk to avoid reading after the end of the
* page.
*/
if (offset + size > MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH)
size = MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH - offset;
}
mlxsw_reg_mcia_pack(mcia_pl, module, 0, 0, offset, size, i2c_addr);
mlxsw_reg_mcia_pack(mcia_pl, module, 0, page, offset, size, i2c_addr);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcia), mcia_pl);
if (err)
@ -168,7 +179,7 @@ int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
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;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
@ -176,10 +187,10 @@ int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
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;
modinfo->eeprom_len = ETH_MODULE_SFF_8636_MAX_LEN;
} else {
modinfo->type = ETH_MODULE_SFF_8436;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
}
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP: