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 */