34 lines
1012 B
C
34 lines
1012 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
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#ifndef LINUX_HMM_DMA_H
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#define LINUX_HMM_DMA_H
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#include <linux/dma-mapping.h>
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struct dma_iova_state;
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struct pci_p2pdma_map_state;
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/*
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* struct hmm_dma_map - array of PFNs and DMA addresses
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*
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* @state: DMA IOVA state
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* @pfns: array of PFNs
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* @dma_list: array of DMA addresses
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* @dma_entry_size: size of each DMA entry in the array
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*/
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struct hmm_dma_map {
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struct dma_iova_state state;
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unsigned long *pfn_list;
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dma_addr_t *dma_list;
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size_t dma_entry_size;
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};
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int hmm_dma_map_alloc(struct device *dev, struct hmm_dma_map *map,
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size_t nr_entries, size_t dma_entry_size);
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void hmm_dma_map_free(struct device *dev, struct hmm_dma_map *map);
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dma_addr_t hmm_dma_map_pfn(struct device *dev, struct hmm_dma_map *map,
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size_t idx,
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struct pci_p2pdma_map_state *p2pdma_state);
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bool hmm_dma_unmap_pfn(struct device *dev, struct hmm_dma_map *map, size_t idx);
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#endif /* LINUX_HMM_DMA_H */
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