[PATCH v5 11/11] drm: nova: Report GPU GID in GPU info

[Alistair Popple]

Add GPU GID to the reported GPU info.

Signed-off-by: Alistair Popple <apopple@xxxxxxxxxx>

---

Changes since v4:

 - New for v5
---
 drivers/gpu/drm/nova/file.rs             | 1 +
 drivers/gpu/nova-core/api.rs             | 5 +++++
 drivers/gpu/nova-core/gsp/commands.rs    | 7 +++++++
 drivers/gpu/nova-core/gsp/fw/commands.rs | 7 +++++++
 include/uapi/drm/nova_drm.h              | 5 +++++
 5 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/nova/file.rs b/drivers/gpu/drm/nova/file.rs
index 64d9f68c7cf0..e1223a29f8b1 100644
--- a/drivers/gpu/drm/nova/file.rs
+++ b/drivers/gpu/drm/nova/file.rs
@@ -38,6 +38,7 @@ fn new(reg_data: &DrmRegData<'_>) -> Self {
             vram_size: reg_data.api.vram_size(),
             gpu_name: reg_data.api.gpu_name(),
             gpu_short_name: reg_data.api.gpu_short_name(),
+            gpu_gid: reg_data.api.gpu_gid(),
         })
     }
 }
diff --git a/drivers/gpu/nova-core/api.rs b/drivers/gpu/nova-core/api.rs
index c18fa1766892..ad4b62db1e5f 100644
--- a/drivers/gpu/nova-core/api.rs
+++ b/drivers/gpu/nova-core/api.rs
@@ -34,6 +34,11 @@ impl NovaCoreApi<'_> {
         *self.gpu.gsp_static_info.gpu_short_name_bytes()
     }
 
+    /// Returns the 16-byte SHA-1 GPU identifier supplied by GSP-RM.
+    pub fn gpu_gid(&self) -> [u8; 16] {
+        *self.gpu.gsp_static_info.gpu_gid()
+    }
+
     /// Obtain a [`NovaCoreApi`] handle from an auxiliary device registered
     /// by nova-core.
     pub fn of(adev: &auxiliary::Device<Bound>) -> Result<Pin<&NovaCoreApi<'_>>> {
diff --git a/drivers/gpu/nova-core/gsp/commands.rs b/drivers/gpu/nova-core/gsp/commands.rs
index b9f19be9b29c..c01b978f46d2 100644
--- a/drivers/gpu/nova-core/gsp/commands.rs
+++ b/drivers/gpu/nova-core/gsp/commands.rs
@@ -215,6 +215,7 @@ fn init(&self) -> impl Init<Self::Command, Self::InitError> {
 pub(crate) struct GetGspStaticInfoReply {
     gpu_name: [u8; 64],
     gpu_short_name: [u8; 64],
+    gpu_gid: [u8; 16],
     /// Usable FB (VRAM) regions for driver memory allocation.
     pub(crate) usable_fb_regions: KVec<Range<u64>>,
 }
@@ -236,6 +237,7 @@ fn read(
         Ok(GetGspStaticInfoReply {
             gpu_name: msg.gpu_name_str(),
             gpu_short_name: msg.gpu_short_name_str(),
+            gpu_gid: msg.gpu_gid(),
             usable_fb_regions,
         })
     }
@@ -263,6 +265,11 @@ impl GetGspStaticInfoReply {
         &self.gpu_short_name
     }
 
+    /// Returns the 16-byte SHA-1 GPU identifier.
+    pub(crate) fn gpu_gid(&self) -> &[u8; 16] {
+        &self.gpu_gid
+    }
+
     /// Returns the name of the GPU as a string.
     ///
     /// Returns an error if the string given by the GSP does not contain a null terminator or
diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs b/drivers/gpu/nova-core/gsp/fw/commands.rs
index 8dddd0876145..1020de51a83c 100644
--- a/drivers/gpu/nova-core/gsp/fw/commands.rs
+++ b/drivers/gpu/nova-core/gsp/fw/commands.rs
@@ -136,6 +136,13 @@ impl GspStaticConfigInfo {
         self.0.gpuShortNameString
     }
 
+    /// Returns the 16-byte SHA-1 GPU identifier.
+    pub(crate) fn gpu_gid(&self) -> [u8; 16] {
+        let mut gid = [0; 16];
+        gid.copy_from_slice(&self.0.gidInfo.data[..16]);
+        gid
+    }
+
     /// Returns an iterator over valid FB regions from GSP firmware data.
     fn fb_regions(
         &self,
diff --git a/include/uapi/drm/nova_drm.h b/include/uapi/drm/nova_drm.h
index f912c5bf3b4f..3bd9db27c665 100644
--- a/include/uapi/drm/nova_drm.h
+++ b/include/uapi/drm/nova_drm.h
@@ -152,6 +152,11 @@ struct drm_nova_gpu_info {
 	 * @gpu_short_name: NUL-terminated short GPU name.
 	 */
 	__u8 gpu_short_name[64];
+
+	/**
+	 * @gpu_gid: 16-byte SHA-1 GPU identifier supplied by GSP-RM.
+	 */
+	__u8 gpu_gid[16];
 };
 
 #define DRM_NOVA_GETPARAM		0x00
-- 
2.54.0