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 53struct tid_pageset { 54 u16 idx; 55 u16 count; 56}; 57 58struct 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 67struct tid_rb_node { 68 struct mmu_rb_node mmu; 69 unsigned long phys; 70 struct tid_group *grp; 71 u32 rcventry; 72 dma_addr_t dma_addr; 73 bool freed; 74 unsigned int npages; 75 struct page *pages[0]; 76}; 77 78static inline int num_user_pages(unsigned long addr, 79 unsigned long len) 80{ 81 const unsigned long spage = addr & PAGE_MASK; 82 const unsigned long epage = (addr + len - 1) & PAGE_MASK; 83 84 return 1 + ((epage - spage) >> PAGE_SHIFT); 85} 86 87int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd, 88 struct hfi1_ctxtdata *uctxt); 89void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd); 90int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd, 91 struct hfi1_tid_info *tinfo); 92int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd, 93 struct hfi1_tid_info *tinfo); 94int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd, 95 struct hfi1_tid_info *tinfo); 96 97#endif /* _HFI1_USER_EXP_RCV_H */ 98