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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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12345678910111213141516171819202122232425262728293031323334/* SPDX-License-Identifier: GPL-2.0-or-later *//* Copyright (c) 2024 NVIDIA Corporation & Affiliates */#ifndef LINUX_HMM_DMA_H#define LINUX_HMM_DMA_H
#include <linux/dma-mapping.h>
struct dma_iova_state;struct pci_p2pdma_map_state;
/* * struct hmm_dma_map - array of PFNs and DMA addresses * * @state: DMA IOVA state * @pfns: array of PFNs * @dma_list: array of DMA addresses * @dma_entry_size: size of each DMA entry in the array */struct hmm_dma_map { struct dma_iova_state state; unsigned long *pfn_list; dma_addr_t *dma_list; size_t dma_entry_size;};
int hmm_dma_map_alloc(struct device *dev, struct hmm_dma_map *map, size_t nr_entries, size_t dma_entry_size);void hmm_dma_map_free(struct device *dev, struct hmm_dma_map *map);dma_addr_t hmm_dma_map_pfn(struct device *dev, struct hmm_dma_map *map, size_t idx, struct pci_p2pdma_map_state *p2pdma_state);bool hmm_dma_unmap_pfn(struct device *dev, struct hmm_dma_map *map, size_t idx);#endif /* LINUX_HMM_DMA_H */