nvdrv: serve Switch 2 nvsrv with Eden's nvdrv; Ampere characteristics

- gsv 1402's nvsrv session speaks the nvdrv INvDrvServices protocol;
  serve it with an NVDRV on the shared module, initialised for the
  calling process (Switch 2 doesn't call Initialize).
- GetCharacteristics3 callers asking for the 0xD0-byte Switch 2 layout
  get chip 0x17E (Ampere; the Switch 2 NvRm rejects Maxwell for NVN),
  Ampere classes, and s16 interface versions at 0x70..0x80.
- After that, unknown nvhost-ctrl-gpu Ioctl3 commands from such callers
  return a zeroed success (logged).

1 files changed, 9 insertions, 0 deletions

diff --git a/src/core/hle/service/nvdrv/nvdrv_interface.cpp b/src/core/hle/service/nvdrv/nvdrv_interface.cpp
index 5fae68adbb..020036d74b 100644
--- a/src/core/hle/service/nvdrv/nvdrv_interface.cpp
+++ b/src/core/hle/service/nvdrv/nvdrv_interface.cpp
@@ -34,6 +34,7 @@ void NVDRV::Open(HLERequestContext& ctx) {
 
     const auto& buffer = ctx.ReadBuffer();
     const std::string device_name(Common::StringFromBuffer(buffer));
+    LOG_DEBUG(Service_NVDRV, "device_name={}", device_name);
 
     if (device_name == "/dev/nvhost-prof-gpu") {
         rb.Push<DeviceFD>(0);
@@ -181,6 +182,14 @@ void NVDRV::Initialize(HLERequestContext& ctx) {
     is_initialized = true;
 }
 
+void NVDRV::InitializeForProcess(Kernel::KProcess* process) {
+    if (is_initialized) {
+        return;
+    }
+    session_id = nvdrv->GetContainer().OpenSession(process);
+    is_initialized = true;
+}
+
 void NVDRV::QueryEvent(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
     const auto fd = rp.Pop<DeviceFD>();