gpu: nova-core: rename Imem to ImemSecure

Rename FalconMem::Imem to ImemSecure to indicate that it references
Secure Instruction Memory.  This change has no functional impact.

On Falcon cores, pages in instruction memory can be tagged as Secure
or Non-Secure.  For GA102 and later, only Secure is used, which is why
FalconMem::Imem seems appropriate.  However, Turing firmware images
can also contain non-secure sections, and so FalconMem needs to support
that.  By renaming Imem to ImemSec now, future patches for Turing support
will be simpler.

Nouveau uses the term "IMEM" to refer both to the Instruction Memory
block on Falcon cores as well as to the images of secure firmware
uploaded to part of IMEM.  OpenRM uses the terms "ImemSec" and "ImemNs"
instead, and uses "IMEM" just to refer to the physical memory device.

Renaming these terms allows us to align with OpenRM, avoid confusion
between IMEM and ImemSec, and makes future patches simpler.

Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20260122222848.2555890-2-ttabi@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>

Author: ttabi

drivers/gpu/nova-core/falcon.rs

@@ -240,8 +240,8 @@ impl From<PeregrineCoreSelect> for bool {
 /// Different types of memory present in a falcon core.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub(crate) enum FalconMem {
-    /// Instruction Memory.
-    Imem,
+    /// Secure Instruction Memory.
+    ImemSecure,
     /// Data Memory.
     Dmem,
 }
@@ -348,8 +348,8 @@ pub(crate) struct FalconBromParams {
 
 /// Trait for providing load parameters of falcon firmwares.
 pub(crate) trait FalconLoadParams {
-    /// Returns the load parameters for `IMEM`.
-    fn imem_load_params(&self) -> FalconLoadTarget;
+    /// Returns the load parameters for Secure `IMEM`.
+    fn imem_sec_load_params(&self) -> FalconLoadTarget;
 
     /// Returns the load parameters for `DMEM`.
     fn dmem_load_params(&self) -> FalconLoadTarget;
@@ -460,7 +460,7 @@ impl<E: FalconEngine + 'static> Falcon<E> {
         //
         // For DMEM we can fold the start offset into the DMA handle.
         let (src_start, dma_start) = match target_mem {
-            FalconMem::Imem => (load_offsets.src_start, fw.dma_handle()),
+            FalconMem::ImemSecure => (load_offsets.src_start, fw.dma_handle()),
             FalconMem::Dmem => (
                 0,
                 fw.dma_handle_with_offset(load_offsets.src_start.into_safe_cast())?,
@@ -517,7 +517,7 @@ impl<E: FalconEngine + 'static> Falcon<E> {
 
         let cmd = regs::NV_PFALCON_FALCON_DMATRFCMD::default()
             .set_size(DmaTrfCmdSize::Size256B)
-            .set_imem(target_mem == FalconMem::Imem)
+            .set_imem(target_mem == FalconMem::ImemSecure)
             .set_sec(if sec { 1 } else { 0 });
 
         for pos in (0..num_transfers).map(|i| i * DMA_LEN) {
@@ -552,7 +552,13 @@ impl<E: FalconEngine + 'static> Falcon<E> {
                 .set_mem_type(FalconFbifMemType::Physical)
         });
 
-        self.dma_wr(bar, fw, FalconMem::Imem, fw.imem_load_params(), true)?;
+        self.dma_wr(
+            bar,
+            fw,
+            FalconMem::ImemSecure,
+            fw.imem_sec_load_params(),
+            true,
+        )?;
         self.dma_wr(bar, fw, FalconMem::Dmem, fw.dmem_load_params(), true)?;
 
         self.hal.program_brom(self, bar, &fw.brom_params())?;

drivers/gpu/nova-core/firmware/booter.rs

@@ -251,8 +251,8 @@ impl<'a> FirmwareSignature<BooterFirmware> for BooterSignature<'a> {}
 
 /// The `Booter` loader firmware, responsible for loading the GSP.
 pub(crate) struct BooterFirmware {
-    // Load parameters for `IMEM` falcon memory.
-    imem_load_target: FalconLoadTarget,
+    // Load parameters for Secure `IMEM` falcon memory.
+    imem_sec_load_target: FalconLoadTarget,
     // Load parameters for `DMEM` falcon memory.
     dmem_load_target: FalconLoadTarget,
     // BROM falcon parameters.
@@ -354,7 +354,7 @@ impl BooterFirmware {
         };
 
         Ok(Self {
-            imem_load_target: FalconLoadTarget {
+            imem_sec_load_target: FalconLoadTarget {
                 src_start: app0.offset,
                 dst_start: 0,
                 len: app0.len,
@@ -371,8 +371,8 @@ impl BooterFirmware {
 }
 
 impl FalconLoadParams for BooterFirmware {
-    fn imem_load_params(&self) -> FalconLoadTarget {
-        self.imem_load_target.clone()
+    fn imem_sec_load_params(&self) -> FalconLoadTarget {
+        self.imem_sec_load_target.clone()
     }
 
     fn dmem_load_params(&self) -> FalconLoadTarget {
@@ -384,7 +384,7 @@ impl FalconLoadParams for BooterFirmware {
     }
 
     fn boot_addr(&self) -> u32 {
-        self.imem_load_target.src_start
+        self.imem_sec_load_target.src_start
     }
 }
 

drivers/gpu/nova-core/firmware/fwsec.rs

@@ -224,7 +224,7 @@ pub(crate) struct FwsecFirmware {
 }
 
 impl FalconLoadParams for FwsecFirmware {
-    fn imem_load_params(&self) -> FalconLoadTarget {
+    fn imem_sec_load_params(&self) -> FalconLoadTarget {
         FalconLoadTarget {
             src_start: 0,
             dst_start: self.desc.imem_phys_base,