Open-IOV: initial public release

Open-IOV virtualizes NVIDIA GPUs so that unmodified guest drivers run with
real GPU functionality - CUDA first, 3D and video to follow - on unmodified
hosts, without a proprietary vGPU license and without patching any driver,
firmware or hypervisor.

Core principle: emulate the interface, pass through the work.

  kernel/     open-iov-vfio.ko - host VFIO mdev driver: virtual GPU device
              (PCI config space, BAR shadows, MSI-X), GSP boot emulation,
              GSP-RM message-queue/RPC emulation, memory model (GPU-VA to
              guest-PA discovery) and the semaphore-completion service that
              advances guest UVM progress.
  userspace/  libiov.so management API and examples.
  tools/      guest diagnostics, firmware analysis wrappers, RM probes.
  scripts/    stack manager, VM harness, build/load/test automation.
  config/     hardware/version profiles (the portability surface).
  docs/       documentation tree - start at docs/README.md.
  wiki/       long-form firmware and protocol deep dives.

Status: initialization works end to end for a stock 570.144 Linux guest on
Turing (TU104): driver probe, nvidia-smi, the full GSP-RM control battery,
object creation and the early CUDA/UVM start-up path. GPU work forwarding -
the step that makes CUDA kernels execute on real hardware - is the active
work item; see docs/04-implementation/01-known-knowns-and-unknowns.md.

License: BSD-3-Clause for the project; GPL-2.0 for kernel modules that link
GPL-only kernel interfaces. See LICENSE and docs/09-reference/legal-and-licensing.md.

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_ */