On Mon, Mar 25, 2024 at 2:30 AM Thomas Monjalon <tho...@monjalon.net> wrote: > > 25/03/2024 07:24, huangdengdui: > > > > On 2024/3/22 21:58, Thomas Monjalon wrote: > > > 22/03/2024 08:09, Dengdui Huang: > > >> -#define RTE_ETH_LINK_SPEED_10G RTE_BIT32(8) /**< 10 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_20G RTE_BIT32(9) /**< 20 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_25G RTE_BIT32(10) /**< 25 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_40G RTE_BIT32(11) /**< 40 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_50G RTE_BIT32(12) /**< 50 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_56G RTE_BIT32(13) /**< 56 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_100G RTE_BIT32(14) /**< 100 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_200G RTE_BIT32(15) /**< 200 Gbps */ > > >> -#define RTE_ETH_LINK_SPEED_400G RTE_BIT32(16) /**< 400 Gbps */ > > >> +#define RTE_ETH_LINK_SPEED_10G RTE_BIT32(8) /**< 10 Gbps */ > > >> +#define RTE_ETH_LINK_SPEED_20G RTE_BIT32(9) /**< 20 Gbps > > >> 2lanes */ > > >> +#define RTE_ETH_LINK_SPEED_25G RTE_BIT32(10) /**< 25 Gbps */ > > >> +#define RTE_ETH_LINK_SPEED_40G RTE_BIT32(11) /**< 40 Gbps > > >> 4lanes */ > > >> +#define RTE_ETH_LINK_SPEED_50G RTE_BIT32(12) /**< 50 Gbps */ > > >> +#define RTE_ETH_LINK_SPEED_56G RTE_BIT32(13) /**< 56 Gbps > > >> 4lanes */ > > >> +#define RTE_ETH_LINK_SPEED_100G RTE_BIT32(14) /**< 100 Gbps */ > > >> +#define RTE_ETH_LINK_SPEED_200G RTE_BIT32(15) /**< 200 Gbps > > >> 4lanes */ > > >> +#define RTE_ETH_LINK_SPEED_400G RTE_BIT32(16) /**< 400 Gbps > > >> 4lanes */ > > >> +#define RTE_ETH_LINK_SPEED_10G_4LANES RTE_BIT32(17) /**< 10 Gbps > > >> 4lanes */ > > >> +#define RTE_ETH_LINK_SPEED_50G_2LANES RTE_BIT32(18) /**< 50 Gbps 2 > > >> lanes */ > > >> +#define RTE_ETH_LINK_SPEED_100G_2LANES RTE_BIT32(19) /**< 100 Gbps 2 > > >> lanes */ > > >> +#define RTE_ETH_LINK_SPEED_100G_4LANES RTE_BIT32(20) /**< 100 Gbps > > >> 4lanes */ > > >> +#define RTE_ETH_LINK_SPEED_200G_2LANES RTE_BIT32(21) /**< 200 Gbps > > >> 2lanes */ > > >> +#define RTE_ETH_LINK_SPEED_400G_8LANES RTE_BIT32(22) /**< 400 Gbps > > >> 8lanes */ > > > > > > I don't think it is a good idea to make this more complex. > > > It brings nothing as far as I can see, compared to having speed and lanes > > > separated. > > > Can we have lanes information a separate value? no need for bitmask. > > > > > Hi,Thomas, Ajit, roretzla, damodharam > > > > I also considered the option at the beginning of the design. > > But this option is not used due to the following reasons: > > 1. For the user, ethtool couples speed and lanes. > > The result of querying the NIC capability is as follows: > > Supported link modes: > > 100000baseSR4/Full > > 100000baseSR2/Full > > The NIC capability is configured as follows: > > ethtool -s eth1 speed 100000 lanes 4 autoneg off > > ethtool -s eth1 speed 100000 lanes 2 autoneg off > > > > Therefore, users are more accustomed to the coupling of speed and lanes. > > > > 2. For the PHY, When the physical layer capability is configured through > > the MDIO, > > the speed and lanes are also coupled. > > For example: > > Table 45–7—PMA/PMD control 2 register bit definitions[1] > > PMA/PMD type selection > > 1 0 0 1 0 1 0 = 100GBASE-SR2 PMA/PMD > > 0 1 0 1 1 1 1 = 100GBASE-SR4 PMA/PMD > > > > Therefore, coupling speeds and lanes is easier to understand. > > And it is easier for the driver to report the support lanes. > > > > In addition, the code implementation is compatible with the old version. > > When the driver does not support the lanes setting, the code does not need > > to be modified. > > > > So I think the speed and lanes coupling is better. > > I don't think so. > You are mixing hardware implementation, user tool, and API. > Having a separate and simple API is cleaner and not more difficult to handle > in some get/set style functions. > > >
Agree with Thomas. DPDK lib/apps should be independent of HW implementation. -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it.
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