diff --git a/ggml/include/ggml-cann.h b/ggml/include/ggml-cann.h index ca73211fea736..031ad1ce24e44 100644 --- a/ggml/include/ggml-cann.h +++ b/ggml/include/ggml-cann.h @@ -80,6 +80,13 @@ ggml_backend_cann_buffer_type(int32_t device); */ GGML_API GGML_CALL int32_t ggml_backend_cann_get_device_count(void); +/** + * @brief pinned host buffer for use with the CPU backend for faster copies between CPU and NPU. + * + * @return A pointer to the host buffer type interface. + */ +GGML_API GGML_CALL ggml_backend_buffer_type_t ggml_backend_cann_host_buffer_type(void); + /** * @brief Retrieves the description of a specific CANN device. * diff --git a/ggml/src/ggml-cann.cpp b/ggml/src/ggml-cann.cpp index e9c370b9b1b8d..aa315b83f77aa 100644 --- a/ggml/src/ggml-cann.cpp +++ b/ggml/src/ggml-cann.cpp @@ -1221,6 +1221,116 @@ ggml_backend_cann_buffer_type(int32_t device) { return &ggml_backend_cann_buffer_types[device]; } +/** + * @brief Retrieves the name associated with a CANN host buffer type. + * + * This function returns the descriptive name associated with the specified + * CANN host buffer type context. + * + * @param buft Pointer to the host buffer type context. + * @return Const pointer to the C-style string containing the name. + */ +GGML_CALL static const char * ggml_backend_cann_host_buffer_type_name(ggml_backend_buffer_type_t buft) { + return "CANN_Host"; + + GGML_UNUSED(buft); +} + +/** + * @brief Retrieves the name associated with a CANN host buffer. + * + * This function returns the descriptive name associated with the specified + * CANN host buffer context. + * + * @param buft Pointer to the host buffer context. + * @return Const pointer to the C-style string containing the name. + */ +GGML_CALL static const char * ggml_backend_cann_host_buffer_name(ggml_backend_buffer_t buffer) { + return "CANN_Host"; + + GGML_UNUSED(buffer); +} + +/** + * @brief Free resources associated with a CANN host buffer. + * + * This function frees the resources associated with a CANN host buffer, including + * its context. + * + * @param buffer The CANN host buffer to free. + */ +GGML_CALL static void ggml_backend_cann_host_buffer_free(ggml_backend_buffer_t buffer) { + ACL_CHECK(aclrtFreeHost(buffer->context)); +} + +/** + * @brief Allocates a new CANN host buffer of the specified size. + * + * This function allocates a new CANN host buffer with the given size. + * @param size Size in bytes of the host buffer to allocate. + * @return Pointer to the allocated host buffer, or nullptr if allocation fails. + */ +static void * ggml_cann_host_malloc(size_t size) { + if (getenv("GGML_CANN_NO_PINNED") != nullptr) { + return nullptr; + } + + void * hostPtr = nullptr; + aclError err = aclrtMallocHost((void **) &hostPtr, size); + if (err != ACL_SUCCESS) { + + GGML_CANN_LOG_WARN("%s: failed to allocate %.2f MiB of pinned memory: %s\n", __func__, + size / 1024.0 / 1024.0, aclGetRecentErrMsg()); + return nullptr; + } + return hostPtr; +} + +/** + * @brief Allocates a new CANN host buffer of the specified type and size. + * + * @param buft Pointer to the host buffer type context. + * @param size Size in bytes of the host buffer to allocate. + * @return Pointer to the allocated host buffer, or CPU buffer pointer if allocation fails. + */ +GGML_CALL static ggml_backend_buffer_t ggml_backend_cann_host_buffer_type_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size) { + void * hostPtr = ggml_cann_host_malloc(size); + + if (hostPtr == nullptr) { + // fallback to cpu buffer + return ggml_backend_buft_alloc_buffer(ggml_backend_cpu_buffer_type(), size); + } + + ggml_backend_buffer_t buffer = ggml_backend_cpu_buffer_from_ptr(hostPtr, size); + buffer->buft = buft; + buffer->iface.get_name = ggml_backend_cann_host_buffer_name; + buffer->iface.free_buffer = ggml_backend_cann_host_buffer_free; + + return buffer; +} + +/** + * @brief Interface for managing CANN host buffer types in the GGML backend. + * + * Provides function pointers for allocating, querying properties, and managing + * memory for CANN buffer types in the GGML backend. + */ +GGML_CALL ggml_backend_buffer_type_t ggml_backend_cann_host_buffer_type() { + static struct ggml_backend_buffer_type ggml_backend_cann_buffer_type_host = { + /* .iface = */ { + /* .get_name = */ ggml_backend_cann_host_buffer_type_name, + /* .alloc_buffer = */ ggml_backend_cann_host_buffer_type_alloc_buffer, + /* .get_alignment = */ ggml_backend_cpu_buffer_type()->iface.get_alignment, + /* .get_max_size = */ NULL, // defaults to SIZE_MAX + /* .get_alloc_size = */ ggml_backend_cpu_buffer_type()->iface.get_alloc_size, + /* .is_host = */ ggml_backend_cpu_buffer_type()->iface.is_host, + }, + /* .context = */ nullptr, + }; + + return &ggml_backend_cann_buffer_type_host; +} + /** * @brief Computes the forward operation for a given tensor using CANN * operations. diff --git a/src/llama.cpp b/src/llama.cpp index acda9e235c040..cdc3f18561dde 100644 --- a/src/llama.cpp +++ b/src/llama.cpp @@ -2156,6 +2156,10 @@ static ggml_backend_buffer_type_t llama_default_buffer_type_cpu(bool host_buffer if (host_buffer) { buft = ggml_backend_sycl_host_buffer_type(); } +#elif defined(GGML_USE_CANN) + if (host_buffer) { + buft = ggml_backend_cann_host_buffer_type(); + } #elif defined(GGML_USE_CPU_HBM) buft = ggml_backend_cpu_hbm_buffer_type(); #elif defined(GGML_USE_VULKAN)