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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright(c) 2020 - Cornelis Networks, Inc.
* Copyright(c) 2015 - 2017 Intel Corporation.
*/
#ifndef _HFI1_USER_EXP_RCV_H
#define _HFI1_USER_EXP_RCV_H
#include "hfi.h"
#include "exp_rcv.h"
struct tid_pageset {
u16 idx;
u16 count;
};
struct tid_user_buf {
struct mmu_interval_notifier notifier;
struct mutex cover_mutex;
unsigned long vaddr;
unsigned long length;
unsigned int npages;
struct page **pages;
struct tid_pageset *psets;
unsigned int n_psets;
};
struct tid_rb_node {
struct mmu_interval_notifier notifier;
struct hfi1_filedata *fdata;
struct mutex invalidate_mutex; /* covers hw removal */
unsigned long phys;
struct tid_group *grp;
u32 rcventry;
dma_addr_t dma_addr;
bool freed;
unsigned int npages;
struct page *pages[] __counted_by(npages);
};
static inline int num_user_pages(unsigned long addr,
unsigned long len)
{
const unsigned long spage = addr & PAGE_MASK;
const unsigned long epage = (addr + len - 1) & PAGE_MASK;
return 1 + ((epage - spage) >> PAGE_SHIFT);
}
int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
struct hfi1_ctxtdata *uctxt);
void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
struct hfi1_tid_info *tinfo);
int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
struct hfi1_tid_info *tinfo);
int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
struct hfi1_tid_info *tinfo);
static inline struct mm_struct *mm_from_tid_node(struct tid_rb_node *node)
{
return node->notifier.mm;
}
#endif /* _HFI1_USER_EXP_RCV_H */
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