1/* 2 * Copyright(c) 2015, 2016 Intel Corporation. 3 * 4 * This file is provided under a dual BSD/GPLv2 license. When using or 5 * redistributing this file, you may do so under either license. 6 * 7 * GPL LICENSE SUMMARY 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * BSD LICENSE 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 24 * - Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * - Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in 28 * the documentation and/or other materials provided with the 29 * distribution. 30 * - Neither the name of Intel Corporation nor the names of its 31 * contributors may be used to endorse or promote products derived 32 * from this software without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 * 46 */ 47#include <linux/device.h> 48#include <linux/wait.h> 49 50#include "common.h" 51#include "iowait.h" 52#include "user_exp_rcv.h" 53 54extern uint extended_psn; 55 56struct hfi1_user_sdma_pkt_q { 57 struct list_head list; 58 unsigned ctxt; 59 unsigned subctxt; 60 u16 n_max_reqs; 61 atomic_t n_reqs; 62 u16 reqidx; 63 struct hfi1_devdata *dd; 64 struct kmem_cache *txreq_cache; 65 struct user_sdma_request *reqs; 66 unsigned long *req_in_use; 67 struct iowait busy; 68 unsigned state; 69 wait_queue_head_t wait; 70 unsigned long unpinned; 71 struct mmu_rb_handler *handler; 72 atomic_t n_locked; 73 struct mm_struct *mm; 74}; 75 76struct hfi1_user_sdma_comp_q { 77 u16 nentries; 78 struct hfi1_sdma_comp_entry *comps; 79}; 80 81int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *, struct file *); 82int hfi1_user_sdma_free_queues(struct hfi1_filedata *); 83int hfi1_user_sdma_process_request(struct file *, struct iovec *, unsigned long, 84 unsigned long *); 85