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_MIN_BIT_MASK - the lowest bit that can be used by hfi1 69 */ 70 #define HFI1_S_AHG_VALID 0x80000000 71 #define HFI1_S_AHG_CLEAR 0x40000000 72 #define HFI1_S_WAIT_PIO_DRAIN 0x20000000 73 #define HFI1_S_WAIT_TID_SPACE 0x10000000 74 #define HFI1_S_WAIT_TID_RESP 0x08000000 75 #define HFI1_S_MIN_BIT_MASK 0x01000000 76 77 /* 78 * overload wait defines 79 */ 80 81 #define HFI1_S_ANY_WAIT_IO (RVT_S_ANY_WAIT_IO | HFI1_S_WAIT_PIO_DRAIN) 82 #define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND) 83 84 /* 85 * Send if not busy or waiting for I/O and either 86 * a RC response is pending or we can process send work requests. 87 */ 88 static inline int hfi1_send_ok(struct rvt_qp *qp) 89 { 90 struct hfi1_qp_priv *priv = qp->priv; 91 92 return !(qp->s_flags & (RVT_S_BUSY | HFI1_S_ANY_WAIT_IO)) && 93 (verbs_txreq_queued(iowait_get_ib_work(&priv->s_iowait)) || 94 (qp->s_flags & RVT_S_RESP_PENDING) || 95 !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); 96 } 97 98 /* 99 * free_ahg - clear ahg from QP 100 */ 101 static inline void clear_ahg(struct rvt_qp *qp) 102 { 103 struct hfi1_qp_priv *priv = qp->priv; 104 105 priv->s_ahg->ahgcount = 0; 106 qp->s_flags &= ~(HFI1_S_AHG_VALID | HFI1_S_AHG_CLEAR); 107 if (priv->s_sde && qp->s_ahgidx >= 0) 108 sdma_ahg_free(priv->s_sde, qp->s_ahgidx); 109 qp->s_ahgidx = -1; 110 } 111 112 /** 113 * hfi1_create_qp - create a queue pair for a device 114 * @ibpd: the protection domain who's device we create the queue pair for 115 * @init_attr: the attributes of the queue pair 116 * @udata: user data for libibverbs.so 117 * 118 * Returns the queue pair on success, otherwise returns an errno. 119 * 120 * Called by the ib_create_qp() core verbs function. 121 */ 122 struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd, 123 struct ib_qp_init_attr *init_attr, 124 struct ib_udata *udata); 125 126 /** 127 * hfi1_qp_wakeup - wake up on the indicated event 128 * @qp: the QP 129 * @flag: flag the qp on which the qp is stalled 130 */ 131 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag); 132 133 struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5); 134 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5); 135 136 void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter); 137 138 bool _hfi1_schedule_send(struct rvt_qp *qp); 139 bool 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 void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp); 148 unsigned free_all_qps(struct rvt_dev_info *rdi); 149 void notify_qp_reset(struct rvt_qp *qp); 150 int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp, 151 struct ib_qp_attr *attr); 152 void flush_qp_waiters(struct rvt_qp *qp); 153 void notify_error_qp(struct rvt_qp *qp); 154 void stop_send_queue(struct rvt_qp *qp); 155 void quiesce_qp(struct rvt_qp *qp); 156 u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu); 157 int mtu_to_path_mtu(u32 mtu); 158 void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl); 159 void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait); 160 #endif /* _QP_H */ 161