Initial commit: Open-IOV vGPU-IO complete stack

- Firmware decompilation: GSP 570.144W (28.5MB ELF, RV64IMAC), 132 decompiled C files
- Kernel modules: nvidia.ko (34MB, OpenRM), open-iov-vfio.ko (2.8MB, VFIO mdev), gsp-vgpu.ko (1.8MB, guest driver)
- Userspace: libiov.so/libvgpu.so (76KB), example_vgpu (28KB), rpc_emulator.c
- PCI config space emulation (256B with PM, MSI, MSI-X, PCIe caps)
- 12 RPC types fully mapped from firmware decompilation
- BAR trap, WPR, scheduling, notification, migration emulation
- Helper scripts: load_vgpu_stack, create_mdev, launch_qemu_vgpu, test_vgpu_stack, setup_guest_driver, unload_vgpu_stack
- Architecture documentation
- Wiki: 10 technical documents
- Git LFS for large binaries (.ko, .bin, .iso, .img, .o, ghidra repos)
- nvidia-open-gpu-kernel-modules as submodule

1 files changed, 53 insertions, 0 deletions

diff --git a/userspace/lib/rpc_emulator.h b/userspace/lib/rpc_emulator.h
new file mode 100644
index 0000000..1b641bf
--- /dev/null
+++ b/userspace/lib/rpc_emulator.h
@@ -0,0 +1,53 @@
+/*
+ * GSP vGPU-IO Userspace RPC Emulator - Header
+ */
+
+#ifndef _RPC_EMULATOR_H_
+#define _RPC_EMULATOR_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "libvgpu.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Emulation mode control */
+void rpc_emu_enable(bool enable);
+bool rpc_emu_is_enabled(void);
+
+/* BAR Emulation */
+int rpc_emu_bar_config(uint32_t vf_id, uint64_t offset, uint64_t size);
+int rpc_emu_bar_force_access(uint32_t vf_id, bool enable);
+int rpc_emu_bar_save(uint32_t vf_id, void *buf, size_t *size);
+int rpc_emu_bar_restore(uint32_t vf_id, const void *buf, size_t size);
+int rpc_emu_bar_get_state(uint32_t vf_id, uint64_t *offset, uint64_t *size);
+
+/* WPR Emulation */
+int rpc_emu_wpr_protect_write(uint32_t vf_id, uint64_t base, uint64_t size);
+int rpc_emu_wpr_protect_read(uint32_t vf_id, uint64_t base, uint64_t size);
+int rpc_emu_wpr_protect(uint32_t vf_id, uint64_t base, uint64_t size, uint32_t flags);
+int rpc_emu_wpr_unprotect(uint32_t vf_id, uint64_t base);
+int rpc_emu_wpr_set_timeout(uint32_t vf_id, uint64_t timeout_ns);
+int rpc_emu_wpr_check_access(uint32_t vf_id, uint64_t addr, uint32_t access_type);
+
+/* Scheduling Emulation */
+int rpc_emu_schedule(uint32_t vf_id, uint64_t work_handle, uint64_t callback, uint64_t arg, uint32_t priority, uint32_t flags);
+int rpc_emu_yield(uint32_t vf_id);
+
+/* Notification Emulation */
+typedef void (*rpc_emu_notify_cb_t)(uint32_t vf_id, uint32_t type, void *data, size_t size, void *ctx);
+int rpc_emu_notify_register(uint32_t vf_id, uint32_t type, rpc_emu_notify_cb_t cb, void *ctx);
+int rpc_emu_notify_unregister(uint32_t vf_id, uint32_t type);
+int rpc_emu_notify_send(uint32_t vf_id, uint32_t type, void *data, size_t size);
+
+/* Init/Fini */
+int rpc_emu_init(void);
+void rpc_emu_fini(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RPC_EMULATOR_H_ */