drivers/staging/rdma/hfi1/qp.h

   1 #ifndef _QP_H
   2 #define _QP_H
   3 /*
   4  * Copyright(c) 2015, 2016 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 <linux/hash.h>
  51 #include <rdma/rdmavt_qp.h>
  52 #include "verbs.h"
  53 #include "sdma.h"
  54
  55 extern unsigned int hfi1_qp_table_size;
  56
  57 /*
  58  * free_ahg - clear ahg from QP
  59  */
  60 static inline void clear_ahg(struct rvt_qp *qp)
  61 {
  62         struct hfi1_qp_priv *priv = qp->priv;
  63
  64         priv->s_hdr->ahgcount = 0;
  65         qp->s_flags &= ~(RVT_S_AHG_VALID | RVT_S_AHG_CLEAR);
  66         if (priv->s_sde && qp->s_ahgidx >= 0)
  67                 sdma_ahg_free(priv->s_sde, qp->s_ahgidx);
  68         qp->s_ahgidx = -1;
  69 }
  70
  71 /**
  72  * hfi1_compute_aeth - compute the AETH (syndrome + MSN)
  73  * @qp: the queue pair to compute the AETH for
  74  *
  75  * Returns the AETH.
  76  */
  77 __be32 hfi1_compute_aeth(struct rvt_qp *qp);
  78
  79 /**
  80  * hfi1_create_qp - create a queue pair for a device
  81  * @ibpd: the protection domain who's device we create the queue pair for
  82  * @init_attr: the attributes of the queue pair
  83  * @udata: user data for libibverbs.so
  84  *
  85  * Returns the queue pair on success, otherwise returns an errno.
  86  *
  87  * Called by the ib_create_qp() core verbs function.
  88  */
  89 struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd,
  90                              struct ib_qp_init_attr *init_attr,
  91                              struct ib_udata *udata);
  92 /**
  93  * hfi1_get_credit - flush the send work queue of a QP
  94  * @qp: the qp who's send work queue to flush
  95  * @aeth: the Acknowledge Extended Transport Header
  96  *
  97  * The QP s_lock should be held.
  98  */
  99 void hfi1_get_credit(struct rvt_qp *qp, u32 aeth);
 100
 101 /**
 102  * hfi1_qp_wakeup - wake up on the indicated event
 103  * @qp: the QP
 104  * @flag: flag the qp on which the qp is stalled
 105  */
 106 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
 107
 108 struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
 109 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
 110
 111 struct qp_iter;
 112
 113 /**
 114  * qp_iter_init - initialize the iterator for the qp hash list
 115  * @dev: the hfi1_ibdev
 116  */
 117 struct qp_iter *qp_iter_init(struct hfi1_ibdev *dev);
 118
 119 /**
 120  * qp_iter_next - Find the next qp in the hash list
 121  * @iter: the iterator for the qp hash list
 122  */
 123 int qp_iter_next(struct qp_iter *iter);
 124
 125 /**
 126  * qp_iter_print - print the qp information to seq_file
 127  * @s: the seq_file to emit the qp information on
 128  * @iter: the iterator for the qp hash list
 129  */
 130 void qp_iter_print(struct seq_file *s, struct qp_iter *iter);
 131
 132 /**
 133  * qp_comm_est - handle trap with QP established
 134  * @qp: the QP
 135  */
 136 void qp_comm_est(struct rvt_qp *qp);
 137
 138 void _hfi1_schedule_send(struct rvt_qp *qp);
 139 void hfi1_schedule_send(struct rvt_qp *qp);
 140
 141 void hfi1_migrate_qp(struct rvt_qp *qp);
 142
 143 /*
 144  * Functions provided by hfi1 driver for rdmavt to use
 145  */
 146 void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp,
 147                     gfp_t gfp);
 148 void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 149 unsigned free_all_qps(struct rvt_dev_info *rdi);
 150 void notify_qp_reset(struct rvt_qp *qp);
 151 int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
 152                        struct ib_qp_attr *attr);
 153 void flush_qp_waiters(struct rvt_qp *qp);
 154 void notify_error_qp(struct rvt_qp *qp);
 155 void stop_send_queue(struct rvt_qp *qp);
 156 void quiesce_qp(struct rvt_qp *qp);
 157 u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
 158 int mtu_to_path_mtu(u32 mtu);
 159 void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
 160 #endif /* _QP_H */