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 54struct tid_pageset { 55 u16 idx; 56 u16 count; 57}; 58 59struct 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 68struct 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 80static 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 89int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd, 90 struct hfi1_ctxtdata *uctxt); 91void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd); 92int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd, 93 struct hfi1_tid_info *tinfo); 94int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd, 95 struct hfi1_tid_info *tinfo); 96int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd, 97 struct hfi1_tid_info *tinfo); 98 99static 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 */ 105