Switches supporting LLDP can communicate port attributes to connected devices. Device drivers capable of accessing this information from the devices can use the new callback get_switch_port_attrs() to report supported and enabled settings in the card's adjacent switch port for display in ethtool. Implementors have to use the respective SUPPORTED_SP_* and ENABLED_SP_* defines to indicate the current settings. Signed-off-by: Stefan Raspl --- include/linux/ethtool.h | 3 +++ include/uapi/linux/ethtool.h | 35 +++++++++++++++++++++++++++++++++++ net/core/ethtool.c | 22 ++++++++++++++++++++++ 3 files changed, 60 insertions(+) --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -177,6 +177,7 @@ static inline u32 ethtool_rxfh_indir_def * @get_module_eeprom: Get the eeprom information from the plug-in module * @get_eee: Get Energy-Efficient (EEE) supported and status. * @set_eee: Set EEE status (enable/disable) as well as LPI timers. + * @get_switch_port_attrs: Get adjacent switch port attributes. * * All operations are optional (i.e. the function pointer may be set * to %NULL) and callers must take this into account. Callers must @@ -245,6 +246,8 @@ struct ethtool_ops { struct ethtool_eeprom *, u8 *); int (*get_eee)(struct net_device *, struct ethtool_eee *); int (*set_eee)(struct net_device *, struct ethtool_eee *); + int (*get_switch_port_attrs)(struct net_device *, + struct ethtool_swport_attrs *); }; --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -136,6 +136,22 @@ struct ethtool_eeprom { }; /** + * struct ethtool_swport_attrs - query adjacent switch port attributes + * @cmd: ETHTOOL_GPORT + * @port_rc: Use GPORT_RC_* as appropriate. + * @supported: Forwarding modes and capabilities supported by the switch port, + * see SUPPORTED_SP_* flags. + * @enabled: Forwarding modes and capabilities currently activated at the + * adjacent switch port, see ENABLED_SP_* flags. + */ +struct ethtool_swport_attrs { + __u32 cmd; + __u32 port_rc; + __u32 supported; + __u32 enabled; +}; + +/** * struct ethtool_eee - Energy Efficient Ethernet information * @cmd: ETHTOOL_{G,S}EEE * @supported: Mask of %SUPPORTED_* flags for the speed/duplex combinations @@ -900,6 +916,7 @@ enum ethtool_sfeatures_retval_bits { #define ETHTOOL_GMODULEEEPROM 0x00000043 /* Get plug-in module eeprom */ #define ETHTOOL_GEEE 0x00000044 /* Get EEE settings */ #define ETHTOOL_SEEE 0x00000045 /* Set EEE settings */ +#define ETHTOOL_GPORT 0x00000046 /* Get switch port attributes */ /* compatibility with older code */ #define SPARC_ETH_GSET ETHTOOL_GSET @@ -1067,6 +1084,24 @@ enum ethtool_sfeatures_retval_bits { #define ETH_MODULE_SFF_8472 0x2 #define ETH_MODULE_SFF_8472_LEN 512 +/* Bad return codes for switch ports */ +#define GPORT_RC_LLDP_UNSUP 1 /* switch port doesn't support */ + /* required LLDP EVB TLV */ + +/* Indicates what features the adjacent switch port supports. */ +#define SUPPORTED_SP_FWD_802_1 (1 << 0) +#define SUPPORTED_SP_FWD_RR (1 << 1) +#define SUPPORTED_SP_CAP_RTE (1 << 9) +#define SUPPORTED_SP_CAP_ECP (1 << 10) +#define SUPPORTED_SP_CAP_VDP (1 << 11) + +/* Indicates what features the adjacent switch port has enabled. */ +#define ENABLED_SP_FWD_802_1 (1 << 0) +#define ENABLED_SP_FWD_RR (1 << 1) +#define ENABLED_SP_CAP_RTE (1 << 9) +#define ENABLED_SP_CAP_ECP (1 << 10) +#define ENABLED_SP_CAP_VDP (1 << 11) + /* Reset flags */ /* The reset() operation must clear the flags for the components which * were actually reset. On successful return, the flags indicate the --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1446,6 +1446,25 @@ static int ethtool_get_module_eeprom(str modinfo.eeprom_len); } +static int ethtool_get_switch_port_attrs(struct net_device *dev, + void __user *useraddr) +{ + struct ethtool_swport_attrs attrs = { ETHTOOL_GPORT }; + int rc; + + if (!dev->ethtool_ops->get_switch_port_attrs) + return -EOPNOTSUPP; + + rc = dev->ethtool_ops->get_switch_port_attrs(dev, &attrs); + if (rc) + return rc; + + if (copy_to_user(useraddr, &attrs, sizeof(attrs))) + return -EFAULT; + + return 0; +} + /* The main entry point in this file. Called from net/core/dev_ioctl.c */ int dev_ethtool(struct net *net, struct ifreq *ifr) @@ -1675,6 +1694,9 @@ int dev_ethtool(struct net *net, struct case ETHTOOL_GMODULEEEPROM: rc = ethtool_get_module_eeprom(dev, useraddr); break; + case ETHTOOL_GPORT: + rc = ethtool_get_switch_port_attrs(dev, useraddr); + break; default: rc = -EOPNOTSUPP; } -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html