drivers/infiniband/hw/hfi1/qp.h

   1 #ifndef _QP_H
   2 #define _QP_H
   3 /*
   4  * Copyright(c) 2015 - 2018 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 #include "verbs_txreq.h"
  55
  56 extern unsigned int hfi1_qp_table_size;
  57
  58 extern const struct rvt_operation_params hfi1_post_parms[];
  59
  60 /*
  61  * Driver specific s_flags starting at bit 31 down to HFI1_S_MIN_BIT_MASK
  62  *
  63  * HFI1_S_AHG_VALID - ahg header valid on chip
  64  * HFI1_S_AHG_CLEAR - have send engine clear ahg state
  65  * HFI1_S_WAIT_PIO_DRAIN - qp waiting for PIOs to drain
  66  * HFI1_S_WAIT_TID_SPACE - a QP is waiting for TID resource
  67  * HFI1_S_WAIT_TID_RESP - waiting for a TID RDMA WRITE response
  68  * HFI1_S_WAIT_HALT - halt the first leg send engine
  69  * HFI1_S_MIN_BIT_MASK - the lowest bit that can be used by hfi1
  70  */
  71 #define HFI1_S_AHG_VALID         0x80000000
  72 #define HFI1_S_AHG_CLEAR         0x40000000
  73 #define HFI1_S_WAIT_PIO_DRAIN    0x20000000
  74 #define HFI1_S_WAIT_TID_SPACE    0x10000000
  75 #define HFI1_S_WAIT_TID_RESP     0x08000000
  76 #define HFI1_S_WAIT_HALT         0x04000000
  77 #define HFI1_S_MIN_BIT_MASK      0x01000000
  78
  79 /*
  80  * overload wait defines
  81  */
  82
  83 #define HFI1_S_ANY_WAIT_IO (RVT_S_ANY_WAIT_IO | HFI1_S_WAIT_PIO_DRAIN)
  84 #define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
  85 #define HFI1_S_ANY_TID_WAIT_SEND (RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA)
  86
  87 /*
  88  * Send if not busy or waiting for I/O and either
  89  * a RC response is pending or we can process send work requests.
  90  */
  91 static inline int hfi1_send_ok(struct rvt_qp *qp)
  92 {
  93         struct hfi1_qp_priv *priv = qp->priv;
  94
  95         return !(qp->s_flags & (RVT_S_BUSY | HFI1_S_ANY_WAIT_IO)) &&
  96                 (verbs_txreq_queued(iowait_get_ib_work(&priv->s_iowait)) ||
  97                 (qp->s_flags & RVT_S_RESP_PENDING) ||
  98                  !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
  99 }
 100
 101 /*
 102  * free_ahg - clear ahg from QP
 103  */
 104 static inline void clear_ahg(struct rvt_qp *qp)
 105 {
 106         struct hfi1_qp_priv *priv = qp->priv;
 107
 108         priv->s_ahg->ahgcount = 0;
 109         qp->s_flags &= ~(HFI1_S_AHG_VALID | HFI1_S_AHG_CLEAR);
 110         if (priv->s_sde && qp->s_ahgidx >= 0)
 111                 sdma_ahg_free(priv->s_sde, qp->s_ahgidx);
 112         qp->s_ahgidx = -1;
 113 }
 114
 115 /**
 116  * hfi1_create_qp - create a queue pair for a device
 117  * @ibpd: the protection domain who's device we create the queue pair for
 118  * @init_attr: the attributes of the queue pair
 119  * @udata: user data for libibverbs.so
 120  *
 121  * Returns the queue pair on success, otherwise returns an errno.
 122  *
 123  * Called by the ib_create_qp() core verbs function.
 124  */
 125 struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd,
 126                              struct ib_qp_init_attr *init_attr,
 127                              struct ib_udata *udata);
 128
 129 /**
 130  * hfi1_qp_wakeup - wake up on the indicated event
 131  * @qp: the QP
 132  * @flag: flag the qp on which the qp is stalled
 133  */
 134 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
 135
 136 struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
 137 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
 138
 139 void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
 140
 141 bool _hfi1_schedule_send(struct rvt_qp *qp);
 142 bool hfi1_schedule_send(struct rvt_qp *qp);
 143
 144 void hfi1_migrate_qp(struct rvt_qp *qp);
 145
 146 /*
 147  * Functions provided by hfi1 driver for rdmavt to use
 148  */
 149 void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 150 void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 151 unsigned free_all_qps(struct rvt_dev_info *rdi);
 152 void notify_qp_reset(struct rvt_qp *qp);
 153 int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
 154                        struct ib_qp_attr *attr);
 155 void flush_qp_waiters(struct rvt_qp *qp);
 156 void notify_error_qp(struct rvt_qp *qp);
 157 void stop_send_queue(struct rvt_qp *qp);
 158 void quiesce_qp(struct rvt_qp *qp);
 159 u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
 160 int mtu_to_path_mtu(u32 mtu);
 161 void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
 162 void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait);
 163 #endif /* _QP_H */