[PATCH 15/18] gpu: nova-core: falcon: add distinct base address for PFALCON2

[Alexandre Courbot]

Falcon engines have two distinct register bases: `PFALCON` and
`PFALCON2`. So far we assumed that `PFALCON2` was located at `PFALCON +
0x1000` because that is the case of most engines, but there are
exceptions (NVDEC uses `0x1c00`).

Fix this shortcoming by leveraging the redesigned relative registers
definitions to assign a distinct `PFalcon2Base` base address to each
falcon engine.

Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
---
 drivers/gpu/nova-core/falcon.rs      |  7 ++++++-
 drivers/gpu/nova-core/falcon/gsp.rs  |  6 +++++-
 drivers/gpu/nova-core/falcon/sec2.rs |  6 +++++-
 drivers/gpu/nova-core/regs.rs        | 12 +++++++-----
 4 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/nova-core/falcon.rs b/drivers/gpu/nova-core/falcon.rs
index 66400d07d186938735f705c116d7c7df5fb77fca..23a4ff591c8db8d4600ec43dfaa42233cbf65c0e 100644
--- a/drivers/gpu/nova-core/falcon.rs
+++ b/drivers/gpu/nova-core/falcon.rs
@@ -263,11 +263,16 @@ fn from(value: bool) -> Self {
 /// Type used to represent the `PFALCON` registers address base for a given falcon engine.
 pub(crate) struct PFalconBase(());
 
+/// Type used to represent the `PFALCON2` registers address base for a given falcon engine.
+pub(crate) struct PFalcon2Base(());
+
 /// Trait defining the parameters of a given Falcon engine.
 ///
 /// Each engine provides one base for `PFALCON` and `PFALCON2` registers. The `ID` constant is used
 /// to identify a given Falcon instance with register I/O methods.
-pub(crate) trait FalconEngine: Sync + RegisterBase<PFalconBase> + Sized {
+pub(crate) trait FalconEngine:
+    Sync + RegisterBase<PFalconBase> + RegisterBase<PFalcon2Base> + Sized
+{
     /// Singleton of the engine, used to identify it with register I/O methods.
     const ID: Self;
 }
diff --git a/drivers/gpu/nova-core/falcon/gsp.rs b/drivers/gpu/nova-core/falcon/gsp.rs
index 0db9f94036a6a7ced5a461aec2cff2ce246a5e0e..f17599cb49fa1e5077a554dc14b3715aa62a4ebd 100644
--- a/drivers/gpu/nova-core/falcon/gsp.rs
+++ b/drivers/gpu/nova-core/falcon/gsp.rs
@@ -2,7 +2,7 @@
 
 use crate::{
     driver::Bar0,
-    falcon::{Falcon, FalconEngine, PFalconBase},
+    falcon::{Falcon, FalconEngine, PFalcon2Base, PFalconBase},
     regs::{self, macros::RegisterBase},
 };
 
@@ -13,6 +13,10 @@ impl RegisterBase<PFalconBase> for Gsp {
     const BASE: usize = 0x00110000;
 }
 
+impl RegisterBase<PFalcon2Base> for Gsp {
+    const BASE: usize = 0x00111000;
+}
+
 impl FalconEngine for Gsp {
     const ID: Self = Gsp(());
 }
diff --git a/drivers/gpu/nova-core/falcon/sec2.rs b/drivers/gpu/nova-core/falcon/sec2.rs
index dbc486a712ffce30efa3a4264b0757974962302e..815786c8480db6cb74541d7ab574112baeb816fe 100644
--- a/drivers/gpu/nova-core/falcon/sec2.rs
+++ b/drivers/gpu/nova-core/falcon/sec2.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
-use crate::falcon::{FalconEngine, PFalconBase};
+use crate::falcon::{FalconEngine, PFalcon2Base, PFalconBase};
 use crate::regs::macros::RegisterBase;
 
 /// Type specifying the `Sec2` falcon engine. Cannot be instantiated.
@@ -10,6 +10,10 @@ impl RegisterBase<PFalconBase> for Sec2 {
     const BASE: usize = 0x00840000;
 }
 
+impl RegisterBase<PFalcon2Base> for Sec2 {
+    const BASE: usize = 0x00841000;
+}
+
 impl FalconEngine for Sec2 {
     const ID: Self = Sec2(());
 }
diff --git a/drivers/gpu/nova-core/regs.rs b/drivers/gpu/nova-core/regs.rs
index 4e047fc4947b6dc09dbd34e26eeda1ff14dff4ad..e6382c116adf699ab24de097c15ddca08017b36d 100644
--- a/drivers/gpu/nova-core/regs.rs
+++ b/drivers/gpu/nova-core/regs.rs
@@ -9,7 +9,7 @@
 
 use crate::falcon::{
     DmaTrfCmdSize, FalconCoreRev, FalconCoreRevSubversion, FalconFbifMemType, FalconFbifTarget,
-    FalconModSelAlgo, FalconSecurityModel, PFalconBase, PeregrineCoreSelect,
+    FalconModSelAlgo, FalconSecurityModel, PFalcon2Base, PFalconBase, PeregrineCoreSelect,
 };
 use crate::gpu::{Architecture, Chipset};
 use kernel::prelude::*;
@@ -282,20 +282,22 @@ pub(crate) fn mem_scrubbing_done(self) -> bool {
     7:7     allow_phys_no_ctx as bool;
 });
 
-register!(NV_PFALCON2_FALCON_MOD_SEL @ PFalconBase[0x00001180] {
+/* PFALCON2 */
+
+register!(NV_PFALCON2_FALCON_MOD_SEL @ PFalcon2Base[0x00000180] {
     7:0     algo as u8 ?=> FalconModSelAlgo;
 });
 
-register!(NV_PFALCON2_FALCON_BROM_CURR_UCODE_ID @ PFalconBase[0x00001198] {
+register!(NV_PFALCON2_FALCON_BROM_CURR_UCODE_ID @ PFalcon2Base[0x00000198] {
     7:0    ucode_id as u8;
 });
 
-register!(NV_PFALCON2_FALCON_BROM_ENGIDMASK @ PFalconBase[0x0000119c] {
+register!(NV_PFALCON2_FALCON_BROM_ENGIDMASK @ PFalcon2Base[0x0000019c] {
     31:0    value as u32;
 });
 
 // TODO[REGA]: this is an array of registers.
-register!(NV_PFALCON2_FALCON_BROM_PARAADDR @ PFalconBase[0x00001210] {
+register!(NV_PFALCON2_FALCON_BROM_PARAADDR @ PFalcon2Base[0x00000210] {
     31:0    value as u32;
 });
 

-- 
2.50.0