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81 lines
2.2 KiB
81 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* MMU-based software IOTLB. |
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* |
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* Copyright (C) 2020-2021 Bytedance Inc. and/or its affiliates. All rights reserved. |
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* |
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* Author: Xie Yongji <[email protected]> |
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* |
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*/ |
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#ifndef _VDUSE_IOVA_DOMAIN_H |
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#define _VDUSE_IOVA_DOMAIN_H |
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#include <linux/iova.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/vhost_iotlb.h> |
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#include <linux/rwlock.h> |
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#define IOVA_START_PFN 1 |
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#define INVALID_PHYS_ADDR (~(phys_addr_t)0) |
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struct vduse_bounce_map { |
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struct page *bounce_page; |
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u64 orig_phys; |
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}; |
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struct vduse_iova_domain { |
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struct iova_domain stream_iovad; |
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struct iova_domain consistent_iovad; |
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struct vduse_bounce_map *bounce_maps; |
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size_t bounce_size; |
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unsigned long iova_limit; |
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int bounce_map; |
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struct vhost_iotlb *iotlb; |
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spinlock_t iotlb_lock; |
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struct file *file; |
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bool user_bounce_pages; |
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rwlock_t bounce_lock; |
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}; |
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int vduse_domain_set_map(struct vduse_iova_domain *domain, |
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struct vhost_iotlb *iotlb); |
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void vduse_domain_clear_map(struct vduse_iova_domain *domain, |
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struct vhost_iotlb *iotlb); |
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dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain, |
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struct page *page, unsigned long offset, |
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size_t size, enum dma_data_direction dir, |
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unsigned long attrs); |
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void vduse_domain_unmap_page(struct vduse_iova_domain *domain, |
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dma_addr_t dma_addr, size_t size, |
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enum dma_data_direction dir, unsigned long attrs); |
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void *vduse_domain_alloc_coherent(struct vduse_iova_domain *domain, |
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size_t size, dma_addr_t *dma_addr, |
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gfp_t flag, unsigned long attrs); |
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void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size, |
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void *vaddr, dma_addr_t dma_addr, |
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unsigned long attrs); |
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void vduse_domain_reset_bounce_map(struct vduse_iova_domain *domain); |
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int vduse_domain_add_user_bounce_pages(struct vduse_iova_domain *domain, |
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struct page **pages, int count); |
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void vduse_domain_remove_user_bounce_pages(struct vduse_iova_domain *domain); |
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void vduse_domain_destroy(struct vduse_iova_domain *domain); |
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struct vduse_iova_domain *vduse_domain_create(unsigned long iova_limit, |
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size_t bounce_size); |
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int vduse_domain_init(void); |
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void vduse_domain_exit(void); |
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#endif /* _VDUSE_IOVA_DOMAIN_H */
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