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68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
// An interface allowing to compute ggml_cgraph with Metal
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//
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// This is a fully functional interface that extends ggml with GPU support for Apple devices.
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// A similar interface can be created for other GPU backends (e.g. Vulkan, CUDA, etc.)
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//
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// How it works?
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//
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// As long as your program can create and evaluate a ggml_cgraph on the CPU, you can use this
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// interface to evaluate the same graph on the GPU. Instead of using ggml_graph_compute(), you
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// use ggml_metal_graph_compute() (or ggml_vulkan_graph_compute(), etc.)
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//
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// You only need to make sure that all memory buffers that you used during the graph creation
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// are mapped to the device memory with the ggml_metal_add_buffer() function. This mapping is
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// used during the graph evaluation to determine the arguments of the compute kernels.
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//
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// Synchronization between device and host memory (for example for input and output tensors)
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// is done with the ggml_metal_set_tensor() and ggml_metal_get_tensor() functions.
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//
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#pragma once
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#include "ggml.h"
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#include "ggml-backend.h"
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#include <stddef.h>
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#include <stdbool.h>
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// max memory buffers that can be mapped to the device
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#define GGML_METAL_MAX_BUFFERS 64
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struct ggml_tensor;
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struct ggml_cgraph;
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#ifdef __cplusplus
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extern "C" {
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#endif
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//
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// backend API
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// user-code should use only these functions
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//
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GGML_API void ggml_backend_metal_log_set_callback(ggml_log_callback cb, void * cb_ctx);
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GGML_API ggml_backend_t ggml_backend_metal_init(void);
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GGML_API bool ggml_backend_is_metal(ggml_backend_t backend);
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GGML_API GGML_CALL ggml_backend_buffer_t ggml_backend_metal_buffer_from_ptr(void * data, size_t size, size_t max_size);
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GGML_API void ggml_backend_metal_set_n_cb(ggml_backend_t backend, int n_cb);
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GGML_API void ggml_backend_metal_set_abort_callback(ggml_backend_t backend, ggml_abort_callback cb, void * cb_ctx);
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GGML_API GGML_CALL ggml_backend_buffer_type_t ggml_backend_metal_buffer_type(void);
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// helper to check if the device supports a specific family
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// ideally, the user code should be doing these checks
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// ref: https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf
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GGML_API bool ggml_backend_metal_supports_family(ggml_backend_t backend, int family);
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// capture all command buffers committed the next time `ggml_backend_graph_compute` is called
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GGML_API void ggml_backend_metal_capture_next_compute(ggml_backend_t backend);
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#ifdef __cplusplus
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}
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#endif
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