Commit f77be04d authored by Joel Fernandes's avatar Joel Fernandes Committed by Alexandre Courbot
Browse files

gpu: nova-core: gsp: Add support for checking if GSP reloaded 



During the sequencer process, we need to check if GSP was successfully
reloaded. Add functionality to check for the same.

Reviewed-by: default avatarLyude Paul <lyude@redhat.com>
Signed-off-by: default avatarJoel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: default avatarAlexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251114195552.739371-6-joelagnelf@nvidia.com>
parent 0f2c8e27

drivers/gpu/nova-core/falcon/gsp.rs

+18 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



use kernel::{

    io::poll::read_poll_timeout,

    prelude::*,

    time::Delta, //

};



use crate::{

    driver::Bar0,

    falcon::{
@@ -37,4 +43,16 @@ pub(crate) fn clear_swgen0_intr(&self, bar: &Bar0) { 
            .set_swgen0(true)

            .write(bar, &Gsp::ID);

    }



    /// Checks if GSP reload/resume has completed during the boot process.

    #[expect(dead_code)]

    pub(crate) fn check_reload_completed(&self, bar: &Bar0, timeout: Delta) -> Result<bool> {

        read_poll_timeout(

            || Ok(regs::NV_PGC6_BSI_SECURE_SCRATCH_14::read(bar)),

            |val| val.boot_stage_3_handoff(),

            Delta::ZERO,

            timeout,

        )

        .map(|_| true)

    }

}

drivers/gpu/nova-core/regs.rs

+6 −0
Original line number Diff line number Diff line
@@ -138,6 +138,12 @@ pub(crate) fn higher_bound(self) -> u64 { 
// These scratch registers remain powered on even in a low-power state and have a designated group

// number.



// Boot Sequence Interface (BSI) register used to determine

// if GSP reload/resume has completed during the boot process.

register!(NV_PGC6_BSI_SECURE_SCRATCH_14 @ 0x001180f8 {

    26:26   boot_stage_3_handoff as bool;

});



// Privilege level mask register. It dictates whether the host CPU has privilege to access the

// `PGC6_AON_SECURE_SCRATCH_GROUP_05` register (which it needs to read GFW_BOOT).

register!(NV_PGC6_AON_SECURE_SCRATCH_GROUP_05_PRIV_LEVEL_MASK @ 0x00118128,