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ƒu 9Ä¿Ì î -/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2007 Cisco Systems. All rights reserved.
* Copyright (c) 2020 Intel Corporation. All rights reserved.
*/
#ifndef IB_UMEM_H
#define IB_UMEM_H
#include
#include
#include
#include
struct ib_ucontext;
struct ib_umem_odp;
struct dma_buf_attach_ops;
struct ib_umem {
struct ib_device *ibdev;
struct mm_struct *owning_mm;
u64 iova;
size_t length;
unsigned long address;
u32 writable : 1;
u32 is_odp : 1;
u32 is_dmabuf : 1;
struct sg_append_table sgt_append;
};
struct ib_umem_dmabuf {
struct ib_umem umem;
struct dma_buf_attachment *attach;
struct sg_table *sgt;
struct scatterlist *first_sg;
struct scatterlist *last_sg;
unsigned long first_sg_offset;
unsigned long last_sg_trim;
void *private;
u8 pinned : 1;
u8 revoked : 1;
};
static inline struct ib_umem_dmabuf *to_ib_umem_dmabuf(struct ib_umem *umem)
{
return container_of(umem, struct ib_umem_dmabuf, umem);
}
/* Returns the offset of the umem start relative to the first page. */
static inline int ib_umem_offset(struct ib_umem *umem)
{
return umem->address & ~PAGE_MASK;
}
static inline dma_addr_t ib_umem_start_dma_addr(struct ib_umem *umem)
{
return sg_dma_address(umem->sgt_append.sgt.sgl) + i