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 56extern unsigned int hfi1_qp_table_size; 57 58extern 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 */ 91static 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 */ 104static 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_qp_wakeup - wake up on the indicated event 117 * @qp: the QP 118 * @flag: flag the qp on which the qp is stalled 119 */ 120void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag); 121 122struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5); 123struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5); 124 125void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter); 126 127bool _hfi1_schedule_send(struct rvt_qp *qp); 128bool hfi1_schedule_send(struct rvt_qp *qp); 129 130void hfi1_migrate_qp(struct rvt_qp *qp); 131 132/* 133 * Functions provided by hfi1 driver for rdmavt to use 134 */ 135void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp); 136void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp); 137unsigned free_all_qps(struct rvt_dev_info *rdi); 138void notify_qp_reset(struct rvt_qp *qp); 139int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp, 140 struct ib_qp_attr *attr); 141void flush_qp_waiters(struct rvt_qp *qp); 142void notify_error_qp(struct rvt_qp *qp); 143void stop_send_queue(struct rvt_qp *qp); 144void quiesce_qp(struct rvt_qp *qp); 145u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu); 146int mtu_to_path_mtu(u32 mtu); 147void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl); 148void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait); 149#endif /* _QP_H */ 150