[PATCH v5 23/23] gpu: nova-core: load and run FWSEC-FRTS

[Danilo Krummrich]

On Wed, Jun 18, 2025 at 10:23:15PM +0200, Danilo Krummrich wrote:
> On Thu, Jun 12, 2025 at 11:01:51PM +0900, Alexandre Courbot wrote:
> > @@ -237,6 +237,67 @@ pub(crate) fn new(
> >              },
> >          )?;
> >  
> > +        // Check that the WPR2 region does not already exists - if it does, the GPU needs to be
> > +        // reset.
> > +        if regs::NV_PFB_PRI_MMU_WPR2_ADDR_HI::read(bar).hi_val() != 0 {
> > +            dev_err!(
> > +                pdev.as_ref(),
> > +                "WPR2 region already exists - GPU needs to be reset to proceed\n"
> > +            );
> > +            return Err(EBUSY);
> > +        }
> > +
> > +        // Reset falcon, load FWSEC-FRTS, and run it.
> > +        gsp_falcon
> > +            .reset(bar)
> > +            .inspect_err(|e| dev_err!(pdev.as_ref(), "Failed to reset GSP falcon: {:?}\n", e))?;
> > +        gsp_falcon
> > +            .dma_load(bar, &fwsec_frts)
> > +            .inspect_err(|e| dev_err!(pdev.as_ref(), "Failed to load FWSEC-FRTS: {:?}\n", e))?;
> > +        let (mbox0, _) = gsp_falcon
> > +            .boot(bar, Some(0), None)
> > +            .inspect_err(|e| dev_err!(pdev.as_ref(), "Failed to boot FWSEC-FRTS: {:?}\n", e))?;
> > +        if mbox0 != 0 {
> > +            dev_err!(pdev.as_ref(), "FWSEC firmware returned error {}\n", mbox0);
> > +            return Err(EIO);
> > +        }
> > +
> > +        // SCRATCH_E contains FWSEC-FRTS' error code, if any.
> > +        let frts_status = regs::NV_PBUS_SW_SCRATCH_0E::read(bar).frts_err_code();
> > +        if frts_status != 0 {
> > +            dev_err!(
> > +                pdev.as_ref(),
> > +                "FWSEC-FRTS returned with error code {:#x}",
> > +                frts_status
> > +            );
> > +            return Err(EIO);
> > +        }
> > +
> > +        // Check the WPR2 has been created as we requested.
> > +        let (wpr2_lo, wpr2_hi) = (
> > +            (regs::NV_PFB_PRI_MMU_WPR2_ADDR_LO::read(bar).lo_val() as u64) << 12,
> > +            (regs::NV_PFB_PRI_MMU_WPR2_ADDR_HI::read(bar).hi_val() as u64) << 12,
> > +        );
> > +        if wpr2_hi == 0 {
> > +            dev_err!(
> > +                pdev.as_ref(),
> > +                "WPR2 region not created after running FWSEC-FRTS\n"
> > +            );
> > +
> > +            return Err(EIO);
> > +        } else if wpr2_lo != fb_layout.frts.start {
> > +            dev_err!(
> > +                pdev.as_ref(),
> > +                "WPR2 region created at unexpected address {:#x}; expected {:#x}\n",
> > +                wpr2_lo,
> > +                fb_layout.frts.start,
> > +            );
> > +            return Err(EIO);
> > +        }
> > +
> > +        dev_dbg!(pdev.as_ref(), "WPR2: {:#x}-{:#x}\n", wpr2_lo, wpr2_hi);
> > +        dev_dbg!(pdev.as_ref(), "GPU instance built\n");
> > +
> 
> This makes Gpu::new() quite messy, can we move this to a separate function
> please?

Actually, can't this just be a method of FwsecFirmware?