diff options
| -rw-r--r-- | net/ethtool/eeprom.c | 62 |
1 files changed, 61 insertions, 1 deletions
diff --git a/net/ethtool/eeprom.c b/net/ethtool/eeprom.c index 8536dd905da5..1a49c133d401 100644 --- a/net/ethtool/eeprom.c +++ b/net/ethtool/eeprom.c @@ -25,6 +25,66 @@ struct eeprom_reply_data { #define MODULE_EEPROM_REPDATA(__reply_base) \ container_of(__reply_base, struct eeprom_reply_data, base) +static int fallback_set_params(struct eeprom_req_info *request, + struct ethtool_modinfo *modinfo, + struct ethtool_eeprom *eeprom) +{ + u32 offset = request->offset; + u32 length = request->length; + + if (request->page) + offset = request->page * ETH_MODULE_EEPROM_PAGE_LEN + offset; + + if (modinfo->type == ETH_MODULE_SFF_8079 && + request->i2c_address == 0x51) + offset += ETH_MODULE_EEPROM_PAGE_LEN * 2; + + if (offset >= modinfo->eeprom_len) + return -EINVAL; + + eeprom->cmd = ETHTOOL_GMODULEEEPROM; + eeprom->len = length; + eeprom->offset = offset; + + return 0; +} + +static int eeprom_fallback(struct eeprom_req_info *request, + struct eeprom_reply_data *reply, + struct genl_info *info) +{ + struct net_device *dev = reply->base.dev; + struct ethtool_modinfo modinfo = {0}; + struct ethtool_eeprom eeprom = {0}; + u8 *data; + int err; + + modinfo.cmd = ETHTOOL_GMODULEINFO; + err = ethtool_get_module_info_call(dev, &modinfo); + if (err < 0) + return err; + + err = fallback_set_params(request, &modinfo, &eeprom); + if (err < 0) + return err; + + data = kmalloc(eeprom.len, GFP_KERNEL); + if (!data) + return -ENOMEM; + err = ethtool_get_module_eeprom_call(dev, &eeprom, data); + if (err < 0) + goto err_out; + + reply->data = data; + reply->length = eeprom.len; + + return 0; + +err_out: + kfree(data); + return err; +} + static int eeprom_prepare_data(const struct ethnl_req_info *req_base, struct ethnl_reply_data *reply_base, struct genl_info *info) @@ -36,7 +96,7 @@ static int eeprom_prepare_data(const struct ethnl_req_info *req_base, int ret; if (!dev->ethtool_ops->get_module_eeprom_by_page) - return -EOPNOTSUPP; + return eeprom_fallback(request, reply, info); page_data.offset = request->offset; page_data.length = request->length; |