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Add functionality to check for the same. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes --- drivers/gpu/nova-core/falcon/gsp.rs | 18 ++++++++++++++++++ drivers/gpu/nova-core/regs.rs | 6 ++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/gpu/nova-core/falcon/gsp.rs b/drivers/gpu/nova-core/falcon/gsp.rs index 93d4eca65631..9ef1fbae141f 100644 --- a/drivers/gpu/nova-core/falcon/gsp.rs +++ b/drivers/gpu/nova-core/falcon/gsp.rs @@ -1,5 +1,11 @@ // 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 { + read_poll_timeout( + || Ok(regs::NV_PGC6_BSI_SECURE_SCRATCH_14::read(bar)), + |val| val.boot_stage_3_handoff(), + Delta::ZERO, + timeout, + ) + .map(|_| true) + } } diff --git a/drivers/gpu/nova-core/regs.rs b/drivers/gpu/nova-core/regs.rs index 274e53a1a44d..b32c07092f93 100644 --- a/drivers/gpu/nova-core/regs.rs +++ b/drivers/gpu/nova-core/regs.rs @@ -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, -- 2.34.1