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This lanes > configuration is applicable only when the nic is forced to fixed > speeds. In Autonegiation mode, the hardware automatically > negotiates the number of lanes. > > These are the new commands. > > testpmd> show port 0 speed_lanes capabilities > > Supported speeds Valid lanes > ----------------------------------- > 10 Gbps 1 > 25 Gbps 1 > 40 Gbps 4 > 50 Gbps 1 2 > 100 Gbps 1 2 4 > 200 Gbps 2 4 > 400 Gbps 4 8 > testpmd> > > testpmd> > testpmd> port stop 0 > testpmd> port config 0 speed_lanes 4 > testpmd> port config 0 speed 200000 duplex full > testpmd> port start 0 > testpmd> > testpmd> show port info 0 > > ********************* Infos for port 0 ********************* > MAC address: 14:23:F2:C3:BA:D2 > Device name: 0000:b1:00.0 > Driver name: net_bnxt > Firmware-version: 228.9.115.0 > Connect to socket: 2 > memory allocation on the socket: 2 > Link status: up > Link speed: 200 Gbps > Active Lanes: 4 > Link duplex: full-duplex > Autoneg status: Off > > Signed-off-by: Damodharam Ammepalli > --- > app/test-pmd/cmdline.c | 248 ++++++++++++++++++++++++++++++++++++- > app/test-pmd/config.c | 4 + > lib/ethdev/ethdev_driver.h | 91 ++++++++++++++ > lib/ethdev/rte_ethdev.c | 52 ++++++++ > lib/ethdev/rte_ethdev.h | 95 ++++++++++++++ > lib/ethdev/version.map | 5 + > 6 files changed, 494 insertions(+), 1 deletion(-) > > diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c > index b7759e38a8..643102032e 100644 > --- a/app/test-pmd/cmdline.c > +++ b/app/test-pmd/cmdline.c > @@ -284,6 +284,9 @@ static void cmd_help_long_parsed(void *parsed_result, > > "dump_log_types\n" > " Dumps the log level for all the dpdk modules\n\n" > + > + "show port (port_id) speed_lanes capabilities" > + " Show speed lanes capabilities of a port.\n\n" > ); > } > > @@ -823,6 +826,9 @@ static void cmd_help_long_parsed(void *parsed_result, > "port config (port_id) txq (queue_id) affinity (value)\n" > " Map a Tx queue with an aggregated port " > "of the DPDK port\n\n" > + > + "port config (port_id|all) speed_lanes (0|1|4|8)\n" > This help string, and the implementation, implies there has to be fixed lane values, like 1, 4, 8. Why not leave this part to the capability reporting, and not limit (and worry) those values in the command, so from command's perspective it can be only . > + " Set number of lanes for all ports or port_id for a forced speed\n\n" > ); > } > > @@ -1560,6 +1566,244 @@ static cmdline_parse_inst_t cmd_config_speed_specific = { > }, > }; > > +static int > +parse_speed_lanes_cfg(portid_t pid, uint32_t lanes) > +{ > + int ret; > + > + ret = rte_eth_speed_lanes_set(pid, lanes); > As a sample application usage, I think it is better if it gets the capability and verify that 'lanes' is withing the capability and later set it, what do you think? <...> > diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h> index 548fada1c7..9444e0a836 100644 > --- a/lib/ethdev/rte_ethdev.h > +++ b/lib/ethdev/rte_ethdev.h > @@ -357,6 +357,27 @@ struct rte_eth_link { > #define RTE_ETH_LINK_MAX_STR_LEN 40 /**< Max length of default link string. */ > /**@}*/ > > +/** > + * Constants used to indicate the possible link speed lanes of an ethdev port. > + */ > +#define RTE_ETH_SPEED_LANE_UNKNOWN 0 /**< speed lanes unsupported mode or default */ > +#define RTE_ETH_SPEED_LANE_1 1 /**< Link speed lane 1 */ > +#define RTE_ETH_SPEED_LANE_2 2 /**< Link speed lanes 2 */ > +#define RTE_ETH_SPEED_LANE_4 4 /**< Link speed lanes 4 */ > +#define RTE_ETH_SPEED_LANE_8 8 /**< Link speed lanes 8 */ > + > +/* Translate from link speed lanes to speed lanes capa */ > +#define RTE_ETH_SPEED_LANES_TO_CAPA(x) RTE_BIT32(x) > + > +/* This macro indicates link speed lanes capa mask */ > +#define RTE_ETH_SPEED_LANES_CAPA_MASK(x) RTE_BIT32(RTE_ETH_SPEED_ ## x) > + > I am not clear why we need these macros, why not use lane number as unsigned integer, instead of macro (RTE_ETH_SPEED_LANE_2), it will be more flexible. Probably all we need is 'RTE_ETH_SPEED_LANES_TO_CAPA' one to use as helper in drivers. Again not sure about the ..CAPA_MASK one, does it actually produce a mask value?