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| // An interface allowing to compute ggml_cgraph with Metal | |
| // | |
| // This is a fully functional interface that extends ggml with GPU support for Apple devices. | |
| // A similar interface can be created for other GPU backends (e.g. Vulkan, CUDA, OpenCL, etc.) | |
| // | |
| // How it works? | |
| // | |
| // As long as your program can create and evaluate a ggml_cgraph on the CPU, you can use this | |
| // interface to evaluate the same graph on the GPU. Instead of using ggml_graph_compute(), you | |
| // use ggml_metal_graph_compute() (or ggml_vulkan_graph_compute(), etc.) | |
| // | |
| // You only need to make sure that all memory buffers that you used during the graph creation | |
| // are mapped to the device memory with the ggml_metal_add_buffer() function. This mapping is | |
| // used during the graph evaluation to determine the arguments of the compute kernels. | |
| // | |
| // Synchronization between device and host memory (for example for input and output tensors) | |
| // is done with the ggml_metal_set_tensor() and ggml_metal_get_tensor() functions. | |
| // | |
| // max memory buffers that can be mapped to the device | |
| struct ggml_tensor; | |
| struct ggml_cgraph; | |
| extern "C" { | |
| // | |
| // backend API | |
| // user-code should use only these functions | |
| // | |
| GGML_API void ggml_backend_metal_log_set_callback(ggml_log_callback log_callback, void * user_data); | |
| GGML_API ggml_backend_t ggml_backend_metal_init(void); | |
| GGML_API bool ggml_backend_is_metal(ggml_backend_t backend); | |
| GGML_API GGML_CALL ggml_backend_buffer_t ggml_backend_metal_buffer_from_ptr(void * data, size_t size, size_t max_size); | |
| GGML_API void ggml_backend_metal_set_n_cb(ggml_backend_t backend, int n_cb); | |
| GGML_API GGML_CALL ggml_backend_buffer_type_t ggml_backend_metal_buffer_type(void); | |
| // helper to check if the device supports a specific family | |
| // ideally, the user code should be doing these checks | |
| // ref: https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf | |
| GGML_API bool ggml_backend_metal_supports_family(ggml_backend_t backend, int family); | |
| // capture all command buffers committed the next time `ggml_backend_graph_compute` is called | |
| GGML_API void ggml_backend_metal_capture_next_compute(ggml_backend_t backend); | |
| } | |