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1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2/*
3 * Copyright(c) 2015 - 2018 Intel Corporation.
4 */
5
6#ifndef _QP_H
7#define _QP_H
8#include <linux/hash.h>
9#include <rdma/rdmavt_qp.h>
10#include "verbs.h"
11#include "sdma.h"
12#include "verbs_txreq.h"
13
14extern unsigned int hfi1_qp_table_size;
15
16extern const struct rvt_operation_params hfi1_post_parms[];
17
18/*
19 * Driver specific s_flags starting at bit 31 down to HFI1_S_MIN_BIT_MASK
20 *
21 * HFI1_S_AHG_VALID - ahg header valid on chip
22 * HFI1_S_AHG_CLEAR - have send engine clear ahg state
23 * HFI1_S_WAIT_PIO_DRAIN - qp waiting for PIOs to drain
24 * HFI1_S_WAIT_TID_SPACE - a QP is waiting for TID resource
25 * HFI1_S_WAIT_TID_RESP - waiting for a TID RDMA WRITE response
26 * HFI1_S_WAIT_HALT - halt the first leg send engine
27 * HFI1_S_MIN_BIT_MASK - the lowest bit that can be used by hfi1
28 */
29#define HFI1_S_AHG_VALID 0x80000000
30#define HFI1_S_AHG_CLEAR 0x40000000
31#define HFI1_S_WAIT_PIO_DRAIN 0x20000000
32#define HFI1_S_WAIT_TID_SPACE 0x10000000
33#define HFI1_S_WAIT_TID_RESP 0x08000000
34#define HFI1_S_WAIT_HALT 0x04000000
35#define HFI1_S_MIN_BIT_MASK 0x01000000
36
37/*
38 * overload wait defines
39 */
40
41#define HFI1_S_ANY_WAIT_IO (RVT_S_ANY_WAIT_IO | HFI1_S_WAIT_PIO_DRAIN)
42#define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
43#define HFI1_S_ANY_TID_WAIT_SEND (RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA)
44
45/*
46 * Send if not busy or waiting for I/O and either
47 * a RC response is pending or we can process send work requests.
48 */
49static inline int hfi1_send_ok(struct rvt_qp *qp)
50{
51 struct hfi1_qp_priv *priv = qp->priv;
52
53 return !(qp->s_flags & (RVT_S_BUSY | HFI1_S_ANY_WAIT_IO)) &&
54 (verbs_txreq_queued(iowait_get_ib_work(&priv->s_iowait)) ||
55 (qp->s_flags & RVT_S_RESP_PENDING) ||
56 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
57}
58
59/*
60 * free_ahg - clear ahg from QP
61 */
62static 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 &= ~(HFI1_S_AHG_VALID | HFI1_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_qp_wakeup - wake up on the indicated event
75 * @qp: the QP
76 * @flag: flag the qp on which the qp is stalled
77 */
78void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
79
80struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
81struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
82
83void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
84
85bool _hfi1_schedule_send(struct rvt_qp *qp);
86bool hfi1_schedule_send(struct rvt_qp *qp);
87
88void hfi1_migrate_qp(struct rvt_qp *qp);
89
90/*
91 * Functions provided by hfi1 driver for rdmavt to use
92 */
93void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
94void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
95unsigned free_all_qps(struct rvt_dev_info *rdi);
96void notify_qp_reset(struct rvt_qp *qp);
97int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
98 struct ib_qp_attr *attr);
99void flush_qp_waiters(struct rvt_qp *qp);
100void notify_error_qp(struct rvt_qp *qp);
101void stop_send_queue(struct rvt_qp *qp);
102void quiesce_qp(struct rvt_qp *qp);
103u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
104int mtu_to_path_mtu(u32 mtu);
105void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
106void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait);
107#endif /* _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
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_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 */
125struct 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 */
134void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
135
136struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
137struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
138
139void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
140
141bool _hfi1_schedule_send(struct rvt_qp *qp);
142bool hfi1_schedule_send(struct rvt_qp *qp);
143
144void hfi1_migrate_qp(struct rvt_qp *qp);
145
146/*
147 * Functions provided by hfi1 driver for rdmavt to use
148 */
149void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
150void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
151unsigned free_all_qps(struct rvt_dev_info *rdi);
152void notify_qp_reset(struct rvt_qp *qp);
153int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
154 struct ib_qp_attr *attr);
155void flush_qp_waiters(struct rvt_qp *qp);
156void notify_error_qp(struct rvt_qp *qp);
157void stop_send_queue(struct rvt_qp *qp);
158void quiesce_qp(struct rvt_qp *qp);
159u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
160int mtu_to_path_mtu(u32 mtu);
161void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
162void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait);
163#endif /* _QP_H */