nfp: flower: change get/set_eeprom logic and enable for flower reps

The changes in this patch are as follows:

- Alter the logic of get/set_eeprom functions to use the helper function
nfp_app_from_netdev() which handles differentiating between an nfp_net
and a nfp_repr. This allows us to get an agnostic backpointer to the
pdev.

- Enable the various eeprom commands by adding the 'get_eeprom_len',
'get_eeprom', 'set_eeprom' callbacks to the nfp_port_ethtool_ops struct.
This allows the eeprom commands to work on representor interfaces,
similar to a previous patch which added it to the vnics.
Currently these are being used to configure persistent MAC addresses for
the physical ports on the nfp.
Signed-off-by: James Hershaw <james.hershaw@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230123134135.293278-1-simon.horman@corigine.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c

@@ -1905,7 +1905,7 @@ static int
 nfp_net_get_eeprom(struct net_device *netdev,
 		   struct ethtool_eeprom *eeprom, u8 *bytes)
 {
-	struct nfp_net *nn = netdev_priv(netdev);
+	struct nfp_app *app = nfp_app_from_netdev(netdev);
 	u8 buf[NFP_EEPROM_LEN] = {};
 
 	if (eeprom->len == 0)
@@ -1914,7 +1914,7 @@ nfp_net_get_eeprom(struct net_device *netdev,
 	if (nfp_net_get_port_mac_by_hwinfo(netdev, buf))
 		return -EOPNOTSUPP;
 
-	eeprom->magic = nn->pdev->vendor | (nn->pdev->device << 16);
+	eeprom->magic = app->pdev->vendor | (app->pdev->device << 16);
 	memcpy(bytes, buf + eeprom->offset, eeprom->len);
 
 	return 0;
@@ -1924,13 +1924,13 @@ static int
 nfp_net_set_eeprom(struct net_device *netdev,
 		   struct ethtool_eeprom *eeprom, u8 *bytes)
 {
-	struct nfp_net *nn = netdev_priv(netdev);
+	struct nfp_app *app = nfp_app_from_netdev(netdev);
 	u8 buf[NFP_EEPROM_LEN] = {};
 
 	if (eeprom->len == 0)
 		return -EINVAL;
 
-	if (eeprom->magic != (nn->pdev->vendor | nn->pdev->device << 16))
+	if (eeprom->magic != (app->pdev->vendor | app->pdev->device << 16))
 		return -EINVAL;
 
 	if (nfp_net_get_port_mac_by_hwinfo(netdev, buf))
@@ -1995,6 +1995,9 @@ const struct ethtool_ops nfp_port_ethtool_ops = {
 	.set_dump		= nfp_app_set_dump,
 	.get_dump_flag		= nfp_app_get_dump_flag,
 	.get_dump_data		= nfp_app_get_dump_data,
+	.get_eeprom_len         = nfp_net_get_eeprom_len,
+	.get_eeprom             = nfp_net_get_eeprom,
+	.set_eeprom             = nfp_net_set_eeprom,
 	.get_module_info	= nfp_port_get_module_info,
 	.get_module_eeprom	= nfp_port_get_module_eeprom,
 	.get_link_ksettings	= nfp_net_get_link_ksettings,