1 #ifndef _QP_H 2 #define _QP_H 3 /* 4 * Copyright(c) 2015 - 2017 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 * Send if not busy or waiting for I/O and either 62 * a RC response is pending or we can process send work requests. 63 */ 64 static inline int hfi1_send_ok(struct rvt_qp *qp) 65 { 66 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && 67 (verbs_txreq_queued(qp) || 68 (qp->s_flags & RVT_S_RESP_PENDING) || 69 !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); 70 } 71 72 /* 73 * free_ahg - clear ahg from QP 74 */ 75 static inline void clear_ahg(struct rvt_qp *qp) 76 { 77 struct hfi1_qp_priv *priv = qp->priv; 78 79 priv->s_ahg->ahgcount = 0; 80 qp->s_flags &= ~(RVT_S_AHG_VALID | RVT_S_AHG_CLEAR); 81 if (priv->s_sde && qp->s_ahgidx >= 0) 82 sdma_ahg_free(priv->s_sde, qp->s_ahgidx); 83 qp->s_ahgidx = -1; 84 } 85 86 /** 87 * hfi1_create_qp - create a queue pair for a device 88 * @ibpd: the protection domain who's device we create the queue pair for 89 * @init_attr: the attributes of the queue pair 90 * @udata: user data for libibverbs.so 91 * 92 * Returns the queue pair on success, otherwise returns an errno. 93 * 94 * Called by the ib_create_qp() core verbs function. 95 */ 96 struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd, 97 struct ib_qp_init_attr *init_attr, 98 struct ib_udata *udata); 99 100 /** 101 * hfi1_qp_wakeup - wake up on the indicated event 102 * @qp: the QP 103 * @flag: flag the qp on which the qp is stalled 104 */ 105 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag); 106 107 struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5); 108 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5); 109 110 void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter); 111 112 void _hfi1_schedule_send(struct rvt_qp *qp); 113 void hfi1_schedule_send(struct rvt_qp *qp); 114 115 void hfi1_migrate_qp(struct rvt_qp *qp); 116 117 /* 118 * Functions provided by hfi1 driver for rdmavt to use 119 */ 120 void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp); 121 void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp); 122 unsigned free_all_qps(struct rvt_dev_info *rdi); 123 void notify_qp_reset(struct rvt_qp *qp); 124 int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp, 125 struct ib_qp_attr *attr); 126 void flush_qp_waiters(struct rvt_qp *qp); 127 void notify_error_qp(struct rvt_qp *qp); 128 void stop_send_queue(struct rvt_qp *qp); 129 void quiesce_qp(struct rvt_qp *qp); 130 u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu); 131 int mtu_to_path_mtu(u32 mtu); 132 void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl); 133 #endif /* _QP_H */ 134