[dpdk-dev] [PATCH v3 1/2] ethdev: add callback to get register size in bytes

[Thomas Monjalon]

2016-06-22 10:19, Zyta Szpak:
> Note that if we remove rte_eth_dev_get_reg_length() then it will break 
> all of the drivers that implement it. Shall I remove it all leave it and 
> modify only ethtool to use rte_eth_dev_get_regs() to get reg size? In 
> the end the drivers will have to implement the part of setting the size 
> in reg_info struct. rte_eth_dev_get_regs() itself wouldn't change at all.
> Or do you have different opinion?

igb, ixgbe and i40e must be updated in the same patch to comply with the
new behaviour of rte_eth_dev_get_regs.
rte_eth_dev_get_reg_length can be deprecated and removed in the next release.


> On 21.06.2016 11:55, Zyta Szpak wrote:
> > OK, I will do the v4.
> >
> > On 17.06.2016 12:20, Thomas Monjalon wrote:
> >> 2016-06-13 16:51, Remy Horton:
> >>> On 12/06/2016 15:51, Zyta Szpak wrote:
> >>>>      I would prefer having only one function rte_eth_dev_get_regs()
> >>>>      which returns length and width if data is NULL.
> >>>>      The first call is a parameter request before buffer allocation,
> >>>>      and the second call fills the buffer.
> >>>>
> >>>>      We can deprecate the old API and introduce this new one.
> >>>>
> >>>>      Opinions?
> >>>>
> >>>> In my opinion as it is now it works fine. Gathering all parameters in
> >>>> one callback might be a good idea if the maintainer also agrees to 
> >>>> that
> >>>> because as I mentioned, it interferes.
> >>>   From my perspective changing rte_eth_dev_get_regs() isn't a 
> >>> problem, as
> >>> it isn't used directly rather than through rte_ethtool_get_regs()..
> >> Zyta, would you like to make a v4?
> >
>