drivers/infiniband/hw/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 extern const struct rvt_operation_params hfi1_post_parms[];
  58
  59 /*
  60  * free_ahg - clear ahg from QP
  61  */
  62 static inline void clear_ahg(struct rvt_qp *qp)
  63 {
  64         struct hfi1_qp_priv *priv = qp->priv;
  65
  66         priv->s_ahg->ahgcount = 0;
  67         qp->s_flags &= ~(RVT_S_AHG_VALID | RVT_S_AHG_CLEAR);
  68         if (priv->s_sde && qp->s_ahgidx >= 0)
  69                 sdma_ahg_free(priv->s_sde, qp->s_ahgidx);
  70         qp->s_ahgidx = -1;
  71 }
  72
  73 /**
  74  * hfi1_create_qp - create a queue pair for a device
  75  * @ibpd: the protection domain who's device we create the queue pair for
  76  * @init_attr: the attributes of the queue pair
  77  * @udata: user data for libibverbs.so
  78  *
  79  * Returns the queue pair on success, otherwise returns an errno.
  80  *
  81  * Called by the ib_create_qp() core verbs function.
  82  */
  83 struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd,
  84                              struct ib_qp_init_attr *init_attr,
  85                              struct ib_udata *udata);
  86
  87 /**
  88  * hfi1_qp_wakeup - wake up on the indicated event
  89  * @qp: the QP
  90  * @flag: flag the qp on which the qp is stalled
  91  */
  92 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
  93
  94 struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
  95 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
  96
  97 struct qp_iter;
  98
  99 /**
 100  * qp_iter_init - initialize the iterator for the qp hash list
 101  * @dev: the hfi1_ibdev
 102  */
 103 struct qp_iter *qp_iter_init(struct hfi1_ibdev *dev);
 104
 105 /**
 106  * qp_iter_next - Find the next qp in the hash list
 107  * @iter: the iterator for the qp hash list
 108  */
 109 int qp_iter_next(struct qp_iter *iter);
 110
 111 /**
 112  * qp_iter_print - print the qp information to seq_file
 113  * @s: the seq_file to emit the qp information on
 114  * @iter: the iterator for the qp hash list
 115  */
 116 void qp_iter_print(struct seq_file *s, struct qp_iter *iter);
 117
 118 void _hfi1_schedule_send(struct rvt_qp *qp);
 119 void hfi1_schedule_send(struct rvt_qp *qp);
 120
 121 void hfi1_migrate_qp(struct rvt_qp *qp);
 122
 123 /*
 124  * Functions provided by hfi1 driver for rdmavt to use
 125  */
 126 void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 127 void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 128 unsigned free_all_qps(struct rvt_dev_info *rdi);
 129 void notify_qp_reset(struct rvt_qp *qp);
 130 int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
 131                        struct ib_qp_attr *attr);
 132 void flush_qp_waiters(struct rvt_qp *qp);
 133 void notify_error_qp(struct rvt_qp *qp);
 134 void stop_send_queue(struct rvt_qp *qp);
 135 void quiesce_qp(struct rvt_qp *qp);
 136 u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
 137 int mtu_to_path_mtu(u32 mtu);
 138 void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
 139 #endif /* _QP_H */