drivers/staging/rdma/hfi1/user_sdma.h

   1 /*
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2015 Intel Corporation.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * BSD LICENSE
  20  *
  21  * Copyright(c) 2015 Intel Corporation.
  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 #include <linux/device.h>
  51 #include <linux/wait.h>
  52
  53 #include "common.h"
  54 #include "iowait.h"
  55 #include "user_exp_rcv.h"
  56
  57 extern uint extended_psn;
  58
  59 struct hfi1_user_sdma_pkt_q {
  60         struct list_head list;
  61         unsigned ctxt;
  62         unsigned subctxt;
  63         u16 n_max_reqs;
  64         atomic_t n_reqs;
  65         u16 reqidx;
  66         struct hfi1_devdata *dd;
  67         struct kmem_cache *txreq_cache;
  68         struct user_sdma_request *reqs;
  69         struct iowait busy;
  70         unsigned state;
  71         wait_queue_head_t wait;
  72         struct mm_struct *user_mm;
  73 };
  74
  75 struct hfi1_user_sdma_comp_q {
  76         u16 nentries;
  77         struct hfi1_sdma_comp_entry *comps;
  78 };
  79
  80 int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *, struct file *);
  81 int hfi1_user_sdma_free_queues(struct hfi1_filedata *);
  82 int hfi1_user_sdma_process_request(struct file *, struct iovec *, unsigned long,
  83                                    unsigned long *);