[PATCH v2 5/7] rust: drm: Pass bound parent device to ioctl handlers

[Danilo Krummrich]

Pass &Self::ParentDevice<Bound> as the second argument to ioctl
handlers. This gives ioctl handlers direct access to the bound parent
bus device.

Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
---
 drivers/gpu/drm/nova/file.rs | 5 +++++
 drivers/gpu/drm/tyr/file.rs  | 3 +++
 rust/kernel/drm/ioctl.rs     | 7 ++++---
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nova/file.rs b/drivers/gpu/drm/nova/file.rs
index a3b7bd36792c..d43f92ee181d 100644
--- a/drivers/gpu/drm/nova/file.rs
+++ b/drivers/gpu/drm/nova/file.rs
@@ -4,6 +4,8 @@
 use crate::gem::NovaObject;
 use kernel::{
     alloc::flags::*,
+    auxiliary,
+    device::Bound,
     drm::{self, gem::BaseObject},
     pci,
     prelude::*,
@@ -24,6 +26,7 @@ impl File {
     /// IOCTL: get_param: Query GPU / driver metadata.
     pub(crate) fn get_param(
         dev: &NovaDevice,
+        _adev: &auxiliary::Device<Bound>,
         getparam: &mut uapi::drm_nova_getparam,
         _file: &drm::File<File>,
     ) -> Result<u32> {
@@ -44,6 +47,7 @@ pub(crate) fn get_param(
     /// IOCTL: gem_create: Create a new DRM GEM object.
     pub(crate) fn gem_create(
         dev: &NovaDevice,
+        _adev: &auxiliary::Device<Bound>,
         req: &mut uapi::drm_nova_gem_create,
         file: &drm::File<File>,
     ) -> Result<u32> {
@@ -57,6 +61,7 @@ pub(crate) fn gem_create(
     /// IOCTL: gem_info: Query GEM metadata.
     pub(crate) fn gem_info(
         _dev: &NovaDevice,
+        _adev: &auxiliary::Device<Bound>,
         req: &mut uapi::drm_nova_gem_info,
         file: &drm::File<File>,
     ) -> Result<u32> {
diff --git a/drivers/gpu/drm/tyr/file.rs b/drivers/gpu/drm/tyr/file.rs
index 31411da203c5..181475f18c18 100644
--- a/drivers/gpu/drm/tyr/file.rs
+++ b/drivers/gpu/drm/tyr/file.rs
@@ -1,7 +1,9 @@
 // SPDX-License-Identifier: GPL-2.0 or MIT
 
 use kernel::{
+    device,
     drm,
+    platform,
     prelude::*,
     uaccess::UserSlice,
     uapi, //
@@ -29,6 +31,7 @@ fn open(_dev: &drm::Device<Self::Driver>) -> Result<Pin<KBox<Self>>> {
 impl TyrDrmFileData {
     pub(crate) fn dev_query(
         ddev: &TyrDrmDevice,
+        _pdev: &platform::Device<device::Bound>,
         devquery: &mut uapi::drm_panthor_dev_query,
         _file: &TyrDrmFile,
     ) -> Result<u32> {
diff --git a/rust/kernel/drm/ioctl.rs b/rust/kernel/drm/ioctl.rs
index 8ee6e8ea0ff6..2229dc55764b 100644
--- a/rust/kernel/drm/ioctl.rs
+++ b/rust/kernel/drm/ioctl.rs
@@ -83,6 +83,7 @@ pub mod internal {
 ///
 /// ```ignore
 /// fn foo(device: &kernel::drm::Device<Self>,
+///        parent: &Self::ParentDevice<kernel::device::Bound>,
 ///        data: &mut uapi::argument_type,
 ///        file: &kernel::drm::File<Self::File>,
 /// ) -> Result<u32>
@@ -145,9 +146,9 @@ macro_rules! declare_drm_ioctls {
                             // type to `$func`'s first parameter, which the compiler cannot infer
                             // through method resolution and associated-type projections alone.
                             #[allow(unreachable_code)]
-                            let _ = || $func(dev, unreachable!(), unreachable!());
+                            let _ = || $func(dev, unreachable!(), unreachable!(), unreachable!());
 
-                            let Some(_guard) = dev.unbind_guard() else {
+                            let Some(guard) = dev.unbind_guard() else {
                                 return $crate::error::code::ENODEV.to_errno();
                             };
                             // SAFETY: The ioctl argument has size `_IOC_SIZE(cmd)`, which we
@@ -162,7 +163,7 @@ macro_rules! declare_drm_ioctls {
                             // SAFETY: This is just the DRM file structure
                             let file = unsafe { $crate::drm::File::from_raw(raw_file) };
 
-                            match $func(dev, data, file) {
+                            match $func(dev, &*guard, data, file) {
                                 Err(e) => e.to_errno(),
                                 Ok(i) => i.try_into()
                                             .unwrap_or($crate::error::code::ERANGE.to_errno()),
-- 
2.54.0