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, 49 insertions, 0 deletions

diff --git a/kernel/architecture/architecture.h b/kernel/architecture/architecture.h
new file mode 100644
index 0000000..3745bf8
--- /dev/null
+++ b/kernel/architecture/architecture.h
@@ -0,0 +1,49 @@
+#ifndef _ARCHITECTURE_H_
+#define _ARCHITECTURE_H_
+
+#include <linux/types.h>
+
+/* BAR configuration */
+struct hw_bar_config {
+    u64 bar0;
+    u64 bar1;
+    u64 bar2;
+    u64 bar3;
+};
+
+/* Hardware architecture definition */
+struct hw_architecture {
+    const char *name;
+    u32 pci_vendor_id;
+    u32 *pci_device_ids;
+    int num_device_ids;
+    struct hw_bar_config bar_sizes;
+    u64 doorbell_offset;
+    u64 shared_mem_offset;
+    u32 shared_mem_size;
+    u64 msix_table_offset;
+    u64 msix_pba_offset;
+    u32 msix_vectors;
+    u32 max_vfs;
+    u64 vram_size;
+    u32 page_size;
+    bool supports_mig;
+    bool supports_sriov;
+    const char *gsp_version;
+};
+
+/* Architecture registry */
+struct hw_architecture *arch_get_by_name(const char *name);
+struct hw_architecture *arch_get_by_pci_id(u32 vendor_id, u32 device_id);
+struct hw_architecture *arch_get_default(void);
+
+/* Architecture queries */
+const struct hw_bar_config *arch_get_bar_config(struct hw_architecture *arch);
+u64 arch_get_doorbell_offset(struct hw_architecture *arch);
+u64 arch_get_shared_mem_offset(struct hw_architecture *arch);
+u32 arch_get_msix_vectors(struct hw_architecture *arch);
+bool arch_supports_mig(struct hw_architecture *arch);
+bool arch_supports_sriov(struct hw_architecture *arch);
+const char *arch_get_gsp_version(struct hw_architecture *arch);
+
+#endif /* _ARCHITECTURE_H_ */
\ No newline at end of file