Commit bb64143e authored by Gal Pressman's avatar Gal Pressman Committed by David S. Miller

net/mlx5e: Add ethtool support for dump module EEPROM

Add query MCIA, PMLP registers infrastructure and commands.
Add ethtool support for get_module_info() and get_module_eeprom()
callbacks.
Signed-off-by: default avatarGal Pressman <galp@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent da54d24e
......@@ -1159,6 +1159,84 @@ static int mlx5e_set_phys_id(struct net_device *dev,
return mlx5_set_port_beacon(mdev, beacon_duration);
}
static int mlx5e_get_module_info(struct net_device *netdev,
struct ethtool_modinfo *modinfo)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
struct mlx5_core_dev *dev = priv->mdev;
int size_read = 0;
u8 data[4];
size_read = mlx5_query_module_eeprom(dev, 0, 2, data);
if (size_read < 2)
return -EIO;
/* data[0] = identifier byte */
switch (data[0]) {
case MLX5_MODULE_ID_QSFP:
modinfo->type = ETH_MODULE_SFF_8436;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
break;
case MLX5_MODULE_ID_QSFP_PLUS:
case MLX5_MODULE_ID_QSFP28:
/* data[1] = revision id */
if (data[0] == MLX5_MODULE_ID_QSFP28 || data[1] >= 0x3) {
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 MLX5_MODULE_ID_SFP:
modinfo->type = ETH_MODULE_SFF_8472;
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
break;
default:
netdev_err(priv->netdev, "%s: cable type not recognized:0x%x\n",
__func__, data[0]);
return -EINVAL;
}
return 0;
}
static int mlx5e_get_module_eeprom(struct net_device *netdev,
struct ethtool_eeprom *ee,
u8 *data)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
struct mlx5_core_dev *mdev = priv->mdev;
int offset = ee->offset;
int size_read;
int i = 0;
if (!ee->len)
return -EINVAL;
memset(data, 0, ee->len);
while (i < ee->len) {
size_read = mlx5_query_module_eeprom(mdev, offset, ee->len - i,
data + i);
if (!size_read)
/* Done reading */
return 0;
if (size_read < 0) {
netdev_err(priv->netdev, "%s: mlx5_query_eeprom failed:0x%x\n",
__func__, size_read);
return 0;
}
i += size_read;
offset += size_read;
}
return 0;
}
const struct ethtool_ops mlx5e_ethtool_ops = {
.get_drvinfo = mlx5e_get_drvinfo,
.get_link = ethtool_op_get_link,
......@@ -1186,4 +1264,6 @@ const struct ethtool_ops mlx5e_ethtool_ops = {
.set_phys_id = mlx5e_set_phys_id,
.get_wol = mlx5e_get_wol,
.set_wol = mlx5e_set_wol,
.get_module_info = mlx5e_get_module_info,
.get_module_eeprom = mlx5e_get_module_eeprom,
};
......@@ -310,6 +310,82 @@ void mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, int *oper_mtu,
}
EXPORT_SYMBOL_GPL(mlx5_query_port_oper_mtu);
static int mlx5_query_module_num(struct mlx5_core_dev *dev, int *module_num)
{
u32 out[MLX5_ST_SZ_DW(pmlp_reg)];
u32 in[MLX5_ST_SZ_DW(pmlp_reg)];
int module_mapping;
int err;
memset(in, 0, sizeof(in));
MLX5_SET(pmlp_reg, in, local_port, 1);
err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out),
MLX5_REG_PMLP, 0, 0);
if (err)
return err;
module_mapping = MLX5_GET(pmlp_reg, out, lane0_module_mapping);
*module_num = module_mapping & MLX5_EEPROM_IDENTIFIER_BYTE_MASK;
return 0;
}
int mlx5_query_module_eeprom(struct mlx5_core_dev *dev,
u16 offset, u16 size, u8 *data)
{
u32 out[MLX5_ST_SZ_DW(mcia_reg)];
u32 in[MLX5_ST_SZ_DW(mcia_reg)];
int module_num;
u16 i2c_addr;
int status;
int err;
void *ptr = MLX5_ADDR_OF(mcia_reg, out, dword_0);
err = mlx5_query_module_num(dev, &module_num);
if (err)
return err;
memset(in, 0, sizeof(in));
size = min_t(int, size, MLX5_EEPROM_MAX_BYTES);
if (offset < MLX5_EEPROM_PAGE_LENGTH &&
offset + size > MLX5_EEPROM_PAGE_LENGTH)
/* Cross pages read, read until offset 256 in low page */
size -= offset + size - MLX5_EEPROM_PAGE_LENGTH;
i2c_addr = MLX5_I2C_ADDR_LOW;
if (offset >= MLX5_EEPROM_PAGE_LENGTH) {
i2c_addr = MLX5_I2C_ADDR_HIGH;
offset -= MLX5_EEPROM_PAGE_LENGTH;
}
MLX5_SET(mcia_reg, in, l, 0);
MLX5_SET(mcia_reg, in, module, module_num);
MLX5_SET(mcia_reg, in, i2c_device_address, i2c_addr);
MLX5_SET(mcia_reg, in, page_number, 0);
MLX5_SET(mcia_reg, in, device_address, offset);
MLX5_SET(mcia_reg, in, size, size);
err = mlx5_core_access_reg(dev, in, sizeof(in), out,
sizeof(out), MLX5_REG_MCIA, 0, 0);
if (err)
return err;
status = MLX5_GET(mcia_reg, out, status);
if (status) {
mlx5_core_err(dev, "query_mcia_reg failed: status: 0x%x\n",
status);
return -EIO;
}
memcpy(data, ptr, size);
return size;
}
EXPORT_SYMBOL_GPL(mlx5_query_module_eeprom);
static int mlx5_query_port_pvlc(struct mlx5_core_dev *dev, u32 *pvlc,
int pvlc_size, u8 local_port)
{
......
......@@ -113,9 +113,10 @@ enum {
MLX5_REG_PELC = 0x500e,
MLX5_REG_PVLC = 0x500f,
MLX5_REG_PCMR = 0x5041,
MLX5_REG_PMLP = 0, /* TBD */
MLX5_REG_PMLP = 0x5002,
MLX5_REG_NODE_DESC = 0x6001,
MLX5_REG_HOST_ENDIANNESS = 0x7004,
MLX5_REG_MCIA = 0x9014,
MLX5_REG_MLCR = 0x902b,
};
......
......@@ -40,6 +40,19 @@ enum mlx5_beacon_duration {
MLX5_BEACON_DURATION_INF = 0xffff,
};
enum mlx5_module_id {
MLX5_MODULE_ID_SFP = 0x3,
MLX5_MODULE_ID_QSFP = 0xC,
MLX5_MODULE_ID_QSFP_PLUS = 0xD,
MLX5_MODULE_ID_QSFP28 = 0x11,
};
#define MLX5_EEPROM_MAX_BYTES 32
#define MLX5_EEPROM_IDENTIFIER_BYTE_MASK 0x000000ff
#define MLX5_I2C_ADDR_LOW 0x50
#define MLX5_I2C_ADDR_HIGH 0x51
#define MLX5_EEPROM_PAGE_LENGTH 256
int mlx5_set_port_caps(struct mlx5_core_dev *dev, u8 port_num, u32 caps);
int mlx5_query_port_ptys(struct mlx5_core_dev *dev, u32 *ptys,
int ptys_size, int proto_mask, u8 local_port);
......@@ -93,5 +106,7 @@ int mlx5_query_port_wol(struct mlx5_core_dev *mdev, u8 *wol_mode);
int mlx5_set_port_fcs(struct mlx5_core_dev *mdev, u8 enable);
void mlx5_query_port_fcs(struct mlx5_core_dev *mdev, bool *supported,
bool *enabled);
int mlx5_query_module_eeprom(struct mlx5_core_dev *dev,
u16 offset, u16 size, u8 *data);
#endif /* __MLX5_PORT_H__ */
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