drivers/infiniband/hw/hfi1/user_sdma.h

   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
  54 extern uint extended_psn;
  55
  56 struct 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         struct iowait busy;
  67         unsigned state;
  68         wait_queue_head_t wait;
  69         unsigned long unpinned;
  70         struct rb_root sdma_rb_root;
  71         u32 n_locked;
  72         struct list_head evict;
  73         spinlock_t evict_lock; /* protect evict and n_locked */
  74 };
  75
  76 struct hfi1_user_sdma_comp_q {
  77         u16 nentries;
  78         struct hfi1_sdma_comp_entry *comps;
  79 };
  80
  81 int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *, struct file *);
  82 int hfi1_user_sdma_free_queues(struct hfi1_filedata *);
  83 int hfi1_user_sdma_process_request(struct file *, struct iovec *, unsigned long,
  84                                    unsigned long *);