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ethtool: Add fallback to get_module_eeprom from netlink command
In case netlink get_module_eeprom_by_page() callback is not implemented by the driver, try to call old get_module_info() and get_module_eeprom() pair. Recalculate parameters to get_module_eeprom() offset and len using page number and their sizes. Return error if this can't be done. Signed-off-by: Vladyslav Tarasiuk <vladyslavt@nvidia.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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parent
95dfc7effd
commit
96d971e307
@ -25,6 +25,66 @@ struct eeprom_reply_data {
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#define MODULE_EEPROM_REPDATA(__reply_base) \
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container_of(__reply_base, struct eeprom_reply_data, base)
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static int fallback_set_params(struct eeprom_req_info *request,
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struct ethtool_modinfo *modinfo,
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struct ethtool_eeprom *eeprom)
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{
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u32 offset = request->offset;
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u32 length = request->length;
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if (request->page)
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offset = request->page * ETH_MODULE_EEPROM_PAGE_LEN + offset;
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if (modinfo->type == ETH_MODULE_SFF_8079 &&
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request->i2c_address == 0x51)
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offset += ETH_MODULE_EEPROM_PAGE_LEN * 2;
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if (offset >= modinfo->eeprom_len)
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return -EINVAL;
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eeprom->cmd = ETHTOOL_GMODULEEEPROM;
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eeprom->len = length;
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eeprom->offset = offset;
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return 0;
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}
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static int eeprom_fallback(struct eeprom_req_info *request,
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struct eeprom_reply_data *reply,
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struct genl_info *info)
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{
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struct net_device *dev = reply->base.dev;
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struct ethtool_modinfo modinfo = {0};
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struct ethtool_eeprom eeprom = {0};
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u8 *data;
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int err;
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modinfo.cmd = ETHTOOL_GMODULEINFO;
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err = ethtool_get_module_info_call(dev, &modinfo);
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if (err < 0)
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return err;
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err = fallback_set_params(request, &modinfo, &eeprom);
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if (err < 0)
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return err;
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data = kmalloc(eeprom.len, GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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err = ethtool_get_module_eeprom_call(dev, &eeprom, data);
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if (err < 0)
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goto err_out;
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reply->data = data;
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reply->length = eeprom.len;
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return 0;
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err_out:
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kfree(data);
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return err;
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}
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static int eeprom_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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struct genl_info *info)
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@ -36,7 +96,7 @@ static int eeprom_prepare_data(const struct ethnl_req_info *req_base,
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int ret;
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if (!dev->ethtool_ops->get_module_eeprom_by_page)
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return -EOPNOTSUPP;
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return eeprom_fallback(request, reply, info);
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page_data.offset = request->offset;
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page_data.length = request->length;
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