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) 2015 - 2017 Intel Corporation.
   5  *
   6  * This file is provided under a dual BSD/GPLv2 license.  When using or
   7  * redistributing this file, you may do so under either license.
   8  *
   9  * GPL LICENSE SUMMARY
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * BSD LICENSE
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  *
  26  *  - Redistributions of source code must retain the above copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  *  - Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in
  30  *    the documentation and/or other materials provided with the
  31  *    distribution.
  32  *  - Neither the name of Intel Corporation nor the names of its
  33  *    contributors may be used to endorse or promote products derived
  34  *    from this software without specific prior written permission.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  37  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  38  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  39  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  40  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  43  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  44  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  45  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  46  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  47  *
  48  */
  49
  50 #include "hfi.h"
  51 #include "exp_rcv.h"
  52
  53 struct tid_pageset {
  54         u16 idx;
  55         u16 count;
  56 };
  57
  58 struct tid_user_buf {
  59         unsigned long vaddr;
  60         unsigned long length;
  61         unsigned int npages;
  62         struct page **pages;
  63         struct tid_pageset *psets;
  64         unsigned int n_psets;
  65 };
  66
  67 struct tid_rb_node {
  68         struct mmu_interval_notifier notifier;
  69         struct hfi1_filedata *fdata;
  70         unsigned long phys;
  71         struct tid_group *grp;
  72         u32 rcventry;
  73         dma_addr_t dma_addr;
  74         bool freed;
  75         unsigned int npages;
  76         struct page *pages[0];
  77 };
  78
  79 static inline int num_user_pages(unsigned long addr,
  80                                  unsigned long len)
  81 {
  82         const unsigned long spage = addr & PAGE_MASK;
  83         const unsigned long epage = (addr + len - 1) & PAGE_MASK;
  84
  85         return 1 + ((epage - spage) >> PAGE_SHIFT);
  86 }
  87
  88 int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
  89                            struct hfi1_ctxtdata *uctxt);
  90 void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
  91 int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
  92                             struct hfi1_tid_info *tinfo);
  93 int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
  94                             struct hfi1_tid_info *tinfo);
  95 int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
  96                               struct hfi1_tid_info *tinfo);
  97
  98 #endif /* _HFI1_USER_EXP_RCV_H */