1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
2 /*
3  * Copyright(c) 2020 - Cornelis Networks, Inc.
4  * Copyright(c) 2015 - 2017 Intel Corporation.
5  */
6 
7 #ifndef _HFI1_USER_EXP_RCV_H
8 #define _HFI1_USER_EXP_RCV_H
9 
10 #include "hfi.h"
11 #include "exp_rcv.h"
12 
13 struct tid_pageset {
14 	u16 idx;
15 	u16 count;
16 };
17 
18 struct tid_user_buf {
19 	struct mmu_interval_notifier notifier;
20 	struct mutex cover_mutex;
21 	unsigned long vaddr;
22 	unsigned long length;
23 	unsigned int npages;
24 	struct page **pages;
25 	struct tid_pageset *psets;
26 	unsigned int n_psets;
27 };
28 
29 struct tid_rb_node {
30 	struct mmu_interval_notifier notifier;
31 	struct hfi1_filedata *fdata;
32 	struct mutex invalidate_mutex; /* covers hw removal */
33 	unsigned long phys;
34 	struct tid_group *grp;
35 	u32 rcventry;
36 	dma_addr_t dma_addr;
37 	bool freed;
38 	unsigned int npages;
39 	struct page *pages[];
40 };
41 
42 static inline int num_user_pages(unsigned long addr,
43 				 unsigned long len)
44 {
45 	const unsigned long spage = addr & PAGE_MASK;
46 	const unsigned long epage = (addr + len - 1) & PAGE_MASK;
47 
48 	return 1 + ((epage - spage) >> PAGE_SHIFT);
49 }
50 
51 int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
52 			   struct hfi1_ctxtdata *uctxt);
53 void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
54 int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
55 			    struct hfi1_tid_info *tinfo);
56 int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
57 			    struct hfi1_tid_info *tinfo);
58 int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
59 			      struct hfi1_tid_info *tinfo);
60 
61 static inline struct mm_struct *mm_from_tid_node(struct tid_rb_node *node)
62 {
63 	return node->notifier.mm;
64 }
65 
66 #endif /* _HFI1_USER_EXP_RCV_H */
67