drivers/infiniband/hw/hfi1/user_exp_rcv.h

   1 #ifndef _HFI1_USER_EXP_RCV_H
   2 #define _HFI1_USER_EXP_RCV_H
   3 /*
   4  * Copyright(c) 2020 - Cornelis Networks, Inc.
   5  * Copyright(c) 2015 - 2017 Intel Corporation.
   6  *
   7  * This file is provided under a dual BSD/GPLv2 license.  When using or
   8  * redistributing this file, you may do so under either license.
   9  *
  10  * GPL LICENSE SUMMARY
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * BSD LICENSE
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  *
  27  *  - Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  *  - Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in
  31  *    the documentation and/or other materials provided with the
  32  *    distribution.
  33  *  - Neither the name of Intel Corporation nor the names of its
  34  *    contributors may be used to endorse or promote products derived
  35  *    from this software without specific prior written permission.
  36  *
  37  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  38  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  39  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  40  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  41  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  44  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  45  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  46  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  47  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  48  *
  49  */
  50
  51 #include "hfi.h"
  52 #include "exp_rcv.h"
  53
  54 struct tid_pageset {
  55         u16 idx;
  56         u16 count;
  57 };
  58
  59 struct tid_user_buf {
  60         unsigned long vaddr;
  61         unsigned long length;
  62         unsigned int npages;
  63         struct page **pages;
  64         struct tid_pageset *psets;
  65         unsigned int n_psets;
  66 };
  67
  68 struct tid_rb_node {
  69         struct mmu_interval_notifier notifier;
  70         struct hfi1_filedata *fdata;
  71         unsigned long phys;
  72         struct tid_group *grp;
  73         u32 rcventry;
  74         dma_addr_t dma_addr;
  75         bool freed;
  76         unsigned int npages;
  77         struct page *pages[];
  78 };
  79
  80 static inline int num_user_pages(unsigned long addr,
  81                                  unsigned long len)
  82 {
  83         const unsigned long spage = addr & PAGE_MASK;
  84         const unsigned long epage = (addr + len - 1) & PAGE_MASK;
  85
  86         return 1 + ((epage - spage) >> PAGE_SHIFT);
  87 }
  88
  89 int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
  90                            struct hfi1_ctxtdata *uctxt);
  91 void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
  92 int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
  93                             struct hfi1_tid_info *tinfo);
  94 int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
  95                             struct hfi1_tid_info *tinfo);
  96 int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
  97                               struct hfi1_tid_info *tinfo);
  98
  99 static inline struct mm_struct *mm_from_tid_node(struct tid_rb_node *node)
 100 {
 101         return node->notifier.mm;
 102 }
 103
 104 #endif /* _HFI1_USER_EXP_RCV_H */