[PATCH v9 4/9] gpu: nova-core: falcon: remove FalconFirmware's dependency on FalconDmaLoadable

[Alexandre Courbot <acourbot@nvidia.com>]

Not all firmware is necessarily loaded by DMA. Remove the requirement
for `FalconFirmware` to implement `FalconDmaLoadable`, and adapt
`Falcon`'s methods constraints accordingly.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
 drivers/gpu/nova-core/falcon.rs | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/nova-core/falcon.rs b/drivers/gpu/nova-core/falcon.rs
index 35744f7c9cb2..5eed48226bd5 100644
--- a/drivers/gpu/nova-core/falcon.rs
+++ b/drivers/gpu/nova-core/falcon.rs
@@ -373,7 +373,7 @@ pub(crate) trait FalconDmaLoadable: Deref<Target = DmaObject> {
 ///
 /// A falcon firmware can be loaded on a given engine, and is presented in the form of a DMA
 /// object.
-pub(crate) trait FalconFirmware: FalconDmaLoadable {
+pub(crate) trait FalconFirmware {
     /// Engine on which this firmware is to be loaded.
     type Target: FalconEngine;
 }
@@ -516,7 +516,11 @@ fn dma_wr(
     }
 
     /// Perform a DMA load into `IMEM` and `DMEM` of `fw`, and prepare the falcon to run it.
-    fn dma_load<F: FalconFirmware<Target = E>>(&self, bar: &Bar0, fw: &F) -> Result {
+    fn dma_load<F: FalconFirmware<Target = E> + FalconDmaLoadable>(
+        &self,
+        bar: &Bar0,
+        fw: &F,
+    ) -> Result {
         // The Non-Secure section only exists on firmware used by Turing and GA100, and
         // those platforms do not use DMA.
         if fw.imem_ns_load_params().is_some() {
@@ -642,7 +646,11 @@ pub(crate) fn is_riscv_active(&self, bar: &Bar0) -> bool {
     }
 
     // Load a firmware image into Falcon memory
-    pub(crate) fn load<F: FalconFirmware<Target = E>>(&self, bar: &Bar0, fw: &F) -> Result {
+    pub(crate) fn load<F: FalconFirmware<Target = E> + FalconDmaLoadable>(
+        &self,
+        bar: &Bar0,
+        fw: &F,
+    ) -> Result {
         match self.hal.load_method() {
             LoadMethod::Dma => self.dma_load(bar, fw),
             LoadMethod::Pio => Err(ENOTSUPP),

-- 
2.53.0