On Fri, 16 Oct 2020 08:59:43 +0530 sundeep subbaraya wrote:
> On Thu, Oct 15, 2020 at 9:02 PM Jakub Kicinski <k...@kernel.org> wrote:
> > On Thu, 15 Oct 2020 17:53:07 +0530 sundeep subbaraya wrote:
> > > Hi Jakub,
> > >
> > > On Thu, Oct 15, 2020 at 8:18 AM Jakub Kicinski <k...@kernel.org> wrote:
> > > >
> > > > On Tue, 13 Oct 2020 15:56:28 +0530 sundeep.l...@gmail.com wrote:
> > > > > -static const struct npc_mcam_kex npc_mkex_default = {
> > > > > +static struct npc_mcam_kex npc_mkex_default = {
> > > > > .mkex_sign = MKEX_SIGN,
> > > > > .name = "default",
> > > > > .kpu_version = NPC_KPU_PROFILE_VER,
> > > >
> > > > Why is this no longer constant? Are you modifying global data based
> > > > on the HW discovered in the system?
> > >
> > > Yes. Due to an errata present on earlier silicons
> > > npc_mkex_default.keyx_cfg[NIX_INTF_TX]
> > > and npc_mkex_default.keyx_cfg[NIX_INTF_RX] needs to be identical.
> >
> > Does this run on the SoC? Is there no possibility that the same kernel
> > will have to drive two different pieces of hardware?
>
> If kernel runs on SoC with errata present then
> npc_mkex_default.keyx_cfg[NIX_INTF_TX]
> is modified to be same as npc_mkex_default.keyx_cfg[NIX_INTF_RX]. And if
> errata
> is not applicable to SoC then npc_mkex_default.keyx_cfg[NIX_INTF_TX]
> is unchanged and the values present in TX and RX are programmed to TX and RX
> interface registers.
Let me rephrase the question - can the AF driver only run on the SoC
or are there configurations in which host can control the AF?
I see that Kconfig depends on ARM64 but is that what you choose
to support or a HW limitation?
