[PATCH v8 06/13] gpu: nova-core: move some functions into the HAL

[Timur Tabi <ttabi@nvidia.com>]

A few Falcon methods are actually GPU-specific, so move them
into the HAL.

Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
---
 drivers/gpu/nova-core/falcon.rs           | 45 ++---------------------
 drivers/gpu/nova-core/falcon/hal.rs       | 10 +++++
 drivers/gpu/nova-core/falcon/hal/ga102.rs | 41 +++++++++++++++++++++
 3 files changed, 54 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/nova-core/falcon.rs b/drivers/gpu/nova-core/falcon.rs
index 3629422e7a52..344354ed50b8 100644
--- a/drivers/gpu/nova-core/falcon.rs
+++ b/drivers/gpu/nova-core/falcon.rs
@@ -16,7 +16,6 @@
     prelude::*,
     sync::aref::ARef,
     time::{
-        delay::fsleep,
         Delta, //
     },
 };
@@ -398,48 +397,11 @@ pub(crate) fn dma_reset(&self, bar: &Bar0) {
         regs::NV_PFALCON_FALCON_DMACTL::default().write(bar, &E::ID);
     }
 
-    /// Wait for memory scrubbing to complete.
-    fn reset_wait_mem_scrubbing(&self, bar: &Bar0) -> Result {
-        // TIMEOUT: memory scrubbing should complete in less than 20ms.
-        read_poll_timeout(
-            || Ok(regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID)),
-            |r| r.mem_scrubbing_done(),
-            Delta::ZERO,
-            Delta::from_millis(20),
-        )
-        .map(|_| ())
-    }
-
-    /// Reset the falcon engine.
-    fn reset_eng(&self, bar: &Bar0) -> Result {
-        let _ = regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID);
-
-        // According to OpenRM's `kflcnPreResetWait_GA102` documentation, HW sometimes does not set
-        // RESET_READY so a non-failing timeout is used.
-        let _ = read_poll_timeout(
-            || Ok(regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID)),
-            |r| r.reset_ready(),
-            Delta::ZERO,
-            Delta::from_micros(150),
-        );
-
-        regs::NV_PFALCON_FALCON_ENGINE::update(bar, &E::ID, |v| v.set_reset(true));
-
-        // TIMEOUT: falcon engine should not take more than 10us to reset.
-        fsleep(Delta::from_micros(10));
-
-        regs::NV_PFALCON_FALCON_ENGINE::update(bar, &E::ID, |v| v.set_reset(false));
-
-        self.reset_wait_mem_scrubbing(bar)?;
-
-        Ok(())
-    }
-
     /// Reset the controller, select the falcon core, and wait for memory scrubbing to complete.
     pub(crate) fn reset(&self, bar: &Bar0) -> Result {
-        self.reset_eng(bar)?;
+        self.hal.reset_eng(bar)?;
         self.hal.select_core(self, bar)?;
-        self.reset_wait_mem_scrubbing(bar)?;
+        self.hal.reset_wait_mem_scrubbing(bar)?;
 
         regs::NV_PFALCON_FALCON_RM::default()
             .set_value(regs::NV_PMC_BOOT_0::read(bar).into())
@@ -673,8 +635,7 @@ pub(crate) fn signature_reg_fuse_version(
     ///
     /// Returns `true` if the RISC-V core is active, `false` otherwise.
     pub(crate) fn is_riscv_active(&self, bar: &Bar0) -> bool {
-        let cpuctl = regs::NV_PRISCV_RISCV_CPUCTL::read(bar, &E::ID);
-        cpuctl.active_stat()
+        self.hal.is_riscv_active(bar)
     }
 
     /// Write the application version to the OS register.
diff --git a/drivers/gpu/nova-core/falcon/hal.rs b/drivers/gpu/nova-core/falcon/hal.rs
index 8dc56a28ad65..c77a1568ea96 100644
--- a/drivers/gpu/nova-core/falcon/hal.rs
+++ b/drivers/gpu/nova-core/falcon/hal.rs
@@ -37,6 +37,16 @@ fn signature_reg_fuse_version(
 
     /// Program the boot ROM registers prior to starting a secure firmware.
     fn program_brom(&self, falcon: &Falcon<E>, bar: &Bar0, params: &FalconBromParams) -> Result;
+
+    /// Check if the RISC-V core is active.
+    /// Returns `true` if the RISC-V core is active, `false` otherwise.
+    fn is_riscv_active(&self, bar: &Bar0) -> bool;
+
+    /// Wait for memory scrubbing to complete.
+    fn reset_wait_mem_scrubbing(&self, bar: &Bar0) -> Result;
+
+    /// Reset the falcon engine.
+    fn reset_eng(&self, bar: &Bar0) -> Result;
 }
 
 /// Returns a boxed falcon HAL adequate for `chipset`.
diff --git a/drivers/gpu/nova-core/falcon/hal/ga102.rs b/drivers/gpu/nova-core/falcon/hal/ga102.rs
index 0bdfe45a2d03..61cc3d261196 100644
--- a/drivers/gpu/nova-core/falcon/hal/ga102.rs
+++ b/drivers/gpu/nova-core/falcon/hal/ga102.rs
@@ -6,6 +6,7 @@
     device,
     io::poll::read_poll_timeout,
     prelude::*,
+    time::delay::fsleep,
     time::Delta, //
 };
 
@@ -117,4 +118,44 @@ fn signature_reg_fuse_version(
     fn program_brom(&self, _falcon: &Falcon<E>, bar: &Bar0, params: &FalconBromParams) -> Result {
         program_brom_ga102::<E>(bar, params)
     }
+
+    fn is_riscv_active(&self, bar: &Bar0) -> bool {
+        let cpuctl = regs::NV_PRISCV_RISCV_CPUCTL::read(bar, &E::ID);
+        cpuctl.active_stat()
+    }
+
+    fn reset_wait_mem_scrubbing(&self, bar: &Bar0) -> Result {
+        // TIMEOUT: memory scrubbing should complete in less than 20ms.
+        read_poll_timeout(
+            || Ok(regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID)),
+            |r| r.mem_scrubbing_done(),
+            Delta::ZERO,
+            Delta::from_millis(20),
+        )
+        .map(|_| ())
+    }
+
+    fn reset_eng(&self, bar: &Bar0) -> Result {
+        let _ = regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID);
+
+        // According to OpenRM's `kflcnPreResetWait_GA102` documentation, HW sometimes does not set
+        // RESET_READY so a non-failing timeout is used.
+        let _ = read_poll_timeout(
+            || Ok(regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID)),
+            |r| r.reset_ready(),
+            Delta::ZERO,
+            Delta::from_micros(150),
+        );
+
+        regs::NV_PFALCON_FALCON_ENGINE::update(bar, &E::ID, |v| v.set_reset(true));
+
+        // TIMEOUT: falcon engine should not take more than 10us to reset.
+        fsleep(Delta::from_micros(10));
+
+        regs::NV_PFALCON_FALCON_ENGINE::update(bar, &E::ID, |v| v.set_reset(false));
+
+        self.reset_wait_mem_scrubbing(bar)?;
+
+        Ok(())
+    }
 }
-- 
2.52.0