gpu: nova-core: gsp: Retrieve GSP static info to gather GPU information

After GSP initialization is complete, retrieve the static configuration
information from GSP-RM. This information includes GPU name, capabilities,
memory configuration, and other properties. On some GPU variants, it is
also required to do this for initialization to complete.

Signed-off-by: Alistair Popple <apopple@nvidia.com>
Co-developed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
[acourbot@nvidia.com: properly abstract the command's bindings, add
relevant methods, make str_from_null_terminated return an Option, fix
size of GPU name array.]
Co-developed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251114195552.739371-14-joelagnelf@nvidia.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs b/drivers/gpu/nova-core/gsp/fw/commands.rs
index e5aab4032175..21be44199693 100644
--- a/drivers/gpu/nova-core/gsp/fw/commands.rs
+++ b/drivers/gpu/nova-core/gsp/fw/commands.rs
@@ -104,3 +104,25 @@ unsafe impl AsBytes for PackedRegistryTable {}
 // SAFETY: This struct only contains integer types for which all bit patterns
 // are valid.
 unsafe impl FromBytes for PackedRegistryTable {}
+
+/// Payload of the `GetGspStaticInfo` command and message.
+#[repr(transparent)]
+pub(crate) struct GspStaticConfigInfo(bindings::GspStaticConfigInfo_t);
+
+impl GspStaticConfigInfo {
+    /// Returns a bytes array containing the (hopefully) zero-terminated name of this GPU.
+    pub(crate) fn gpu_name_str(&self) -> [u8; 64] {
+        self.0.gpuNameString
+    }
+}
+
+// SAFETY: Padding is explicit and will not contain uninitialized data.
+unsafe impl AsBytes for GspStaticConfigInfo {}
+
+// SAFETY: This struct only contains integer types for which all bit patterns
+// are valid.
+unsafe impl FromBytes for GspStaticConfigInfo {}
+
+// SAFETY: This struct only contains integer types and fixed-size arrays for which
+// all bit patterns are valid.
+unsafe impl Zeroable for GspStaticConfigInfo {}